Browse Source

Merge branch 'master' into 2.1.0-beta1

# Conflicts:
#	abouteasyexcel.md
#	pom.xml
#	quickstart.md
#	src/main/java/com/alibaba/excel/write/metadata/holder/WriteWorkbookHolder.java
#	src/test/java/com/alibaba/easyexcel/test/temp/simple/HgTest.java
#	update.md
bugfix
Jiaju Zhuang 5 years ago
parent
commit
46f35cecec
  1. 22
      docs/LARGEREAD.md
  2. 1
      quickstart.md
  3. 2
      src/main/java/com/alibaba/excel/analysis/ExcelAnalyserImpl.java
  4. 32
      src/main/java/com/alibaba/excel/analysis/v03/XlsSaxAnalyser.java
  5. 37
      src/main/java/com/alibaba/excel/analysis/v07/XlsxSaxAnalyser.java
  6. 177
      src/main/java/com/alibaba/excel/cache/Ehcache.java
  7. 23
      src/main/java/com/alibaba/excel/cache/selector/EternalReadCacheSelector.java
  8. 21
      src/main/java/com/alibaba/excel/cache/selector/ReadCacheSelector.java
  9. 82
      src/main/java/com/alibaba/excel/cache/selector/SimpleReadCacheSelector.java
  10. 25
      src/main/java/com/alibaba/excel/read/builder/ExcelReaderBuilder.java
  11. 27
      src/main/java/com/alibaba/excel/read/metadata/ReadWorkbook.java
  12. 16
      src/main/java/com/alibaba/excel/read/metadata/holder/AbstractReadHolder.java
  13. 49
      src/main/java/com/alibaba/excel/read/metadata/holder/ReadWorkbookHolder.java
  14. 62
      src/test/java/com/alibaba/easyexcel/test/temp/cache/CacheTest.java
  15. 60
      src/test/java/com/alibaba/easyexcel/test/temp/large/LargeData.java
  16. 33
      src/test/java/com/alibaba/easyexcel/test/temp/large/LargeDataListener.java
  17. 28
      src/test/java/com/alibaba/easyexcel/test/temp/large/TempLargeDataTest.java
  18. 4
      src/test/java/com/alibaba/easyexcel/test/temp/simple/HgTest.java
  19. 6
      update.md

22
docs/LARGEREAD.md

@ -0,0 +1,22 @@
# 10M以上文件读取说明
03版没有办法处理,相对内存占用大很多。excel 07版本有个共享字符串[共享字符串](https://docs.microsoft.com/zh-cn/office/open-xml/working-with-the-shared-string-table)的概念,这个会非常占用内存,如果全部读取到内存的话,大概是excel文件的大小的3-10倍,所以easyexcel用存储文件的,然后再反序列化去读取的策略来节约内存。当然需要通过文件反序列化以后,效率会降低,大概降低30-50%(不一定,也看命中率,可能会超过100%)
## 如果对读取效率感觉还能接受,就用默认的,永久占用(单个excel读取整个过程)一般不会超过50M(大概率就30M),剩下临时的GC会很快回收
## 默认大文件处理
默认大文件处理会自动判断,共享字符串5M以下会使用内存存储,大概占用15-50M的内存,超过5M则使用文件存储,然后文件存储也要设置多内存M用来存放临时的共享字符串,默认20M。除了共享字符串占用内存外,其他占用较少,所以可以预估10M,所以默认大概30M就能读取一个超级大的文件。
## 根据实际需求配置内存
想自定义设置,首先要确定你大概愿意花多少内存来读取一个超级大的excel,比如希望读取excel最多占用100M内存(是读取过程中永久占用,新生代马上回收的不算),那就设置使用文件来存储共享字符串的大小判断为20M(小于20M存内存,大于存临时文件),然后设置文件存储时临时共享字符串占用内存大小90M差不多
### 如果最大文件条数也就十几二十万,然后excel也就是十几二十M,而且不会有很高的并发,并且内存也较大
```java
// 强制使用内存存储,这样大概一个20M的excel使用150M(很多临时对象,所以100M会一直GC)的内存
// 这样效率会比上面的复杂的策略高很多
EasyExcel.read().readCache(new MapCache());
```
### 对并发要求较高,而且都是经常有超级大文件
```java
// 第一个参数的意思是 多少M共享字符串以后 采用文件存储 单位MB 默认5M
// 第二个参数 文件存储时,内存存放多少M缓存数据 默认20M
// 比如 你希望用100M内存(这里说的是解析过程中的永久占用,临时对象不算)来解析excel,前面算过了 大概是 20M+90M 所以设置参数为:20 和 90
EasyExcel.read().readCacheSelector(new SimpleReadCacheSelector(5, 20));
```
### 关于maxCacheActivateSize 也就是前面第二个参数的详细说明
easyexcel在使用文件存储的时候,会把共享字符串拆分成1000条一批,然后放到文件存储。然后excel来读取共享字符串大概率是按照顺序的,所以默认20M的1000条的数据放在内存,命中后直接返回,没命中去读文件。所以不能设置太小,太小了,很难命中,一直去读取文件,太大了的话会占用过多的内存。

1
quickstart.md

@ -13,6 +13,7 @@
* 出现`NoSuchMethodException`,`ClassNotFoundException`,`NoClassDefFoundError`极大概率是jar冲突,建议`clean`项目,或者统一`poi` 的版本,理论上来说`easyexcel`兼容poi的`3.17`,`4.0.1`,`4.1.0`所有较新版本 * 出现`NoSuchMethodException`,`ClassNotFoundException`,`NoClassDefFoundError`极大概率是jar冲突,建议`clean`项目,或者统一`poi` 的版本,理论上来说`easyexcel`兼容poi的`3.17`,`4.0.1`,`4.1.0`所有较新版本
* 如果在读的时候`Listener`里面需要使用spring的`@Autowired`,给`Listener`创建成员变量,然后在构造方法里面传进去。而别必须不让spring管理`Listener`,每次读取都要`new`一个。 * 如果在读的时候`Listener`里面需要使用spring的`@Autowired`,给`Listener`创建成员变量,然后在构造方法里面传进去。而别必须不让spring管理`Listener`,每次读取都要`new`一个。
* 如果用`String`去接收数字,出现小数点等情况,这个是BUG,但是很难修复,后续版本会修复这个问题。目前请使用`@NumberFormat`注解,里面的参数就是调用了java自带的`NumberFormat.format`方法,不知道怎么入参的可以自己网上查询。 * 如果用`String`去接收数字,出现小数点等情况,这个是BUG,但是很难修复,后续版本会修复这个问题。目前请使用`@NumberFormat`注解,里面的参数就是调用了java自带的`NumberFormat.format`方法,不知道怎么入参的可以自己网上查询。
* 10M以上xlsx读取很慢或者内存占用大 请先阅读[10M以上文件读取说明](/docs/LARGEREAD.md)
#### 详细参数介绍 #### 详细参数介绍
有些参数不知道怎么用,或者有些功能不知道用什么参数,参照:[详细参数介绍](/docs/API.md) 有些参数不知道怎么用,或者有些功能不知道用什么参数,参照:[详细参数介绍](/docs/API.md)
#### 开源项目不容易,如果觉得本项目对您的工作还是有帮助的话,请在右上角帮忙点个★Star。 #### 开源项目不容易,如果觉得本项目对您的工作还是有帮助的话,请在右上角帮忙点个★Star。

2
src/main/java/com/alibaba/excel/analysis/ExcelAnalyserImpl.java

@ -119,7 +119,7 @@ public class ExcelAnalyserImpl implements ExcelAnalyser {
} }
try { try {
if (readWorkbookHolder.getOpcPackage() != null) { if (readWorkbookHolder.getOpcPackage() != null) {
readWorkbookHolder.getOpcPackage().close(); readWorkbookHolder.getOpcPackage().revert();
} }
} catch (Throwable t) { } catch (Throwable t) {
throwCanNotCloseIo(t); throwCanNotCloseIo(t);

32
src/main/java/com/alibaba/excel/analysis/v03/XlsSaxAnalyser.java

@ -2,7 +2,6 @@ package com.alibaba.excel.analysis.v03;
import java.io.IOException; import java.io.IOException;
import java.util.ArrayList; import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections; import java.util.Collections;
import java.util.List; import java.util.List;
import java.util.Map; import java.util.Map;
@ -60,11 +59,9 @@ import com.alibaba.excel.util.CollectionUtils;
public class XlsSaxAnalyser implements HSSFListener, ExcelExecutor { public class XlsSaxAnalyser implements HSSFListener, ExcelExecutor {
private static final Logger LOGGER = LoggerFactory.getLogger(XlsSaxAnalyser.class); private static final Logger LOGGER = LoggerFactory.getLogger(XlsSaxAnalyser.class);
private boolean outputFormulaValues = true;
private POIFSFileSystem poifsFileSystem; private POIFSFileSystem poifsFileSystem;
private int lastRowNumber; private int lastRowNumber;
private int lastColumnNumber; private int lastColumnNumber;
private boolean notAllEmpty = false;
/** /**
* For parsing Formulas * For parsing Formulas
*/ */
@ -105,11 +102,7 @@ public class XlsSaxAnalyser implements HSSFListener, ExcelExecutor {
init(); init();
HSSFEventFactory factory = new HSSFEventFactory(); HSSFEventFactory factory = new HSSFEventFactory();
HSSFRequest request = new HSSFRequest(); HSSFRequest request = new HSSFRequest();
if (outputFormulaValues) { request.addListenerForAllRecords(formatListener);
request.addListenerForAllRecords(formatListener);
} else {
request.addListenerForAllRecords(workbookBuildingListener);
}
try { try {
factory.processWorkbookEvents(request, poifsFileSystem); factory.processWorkbookEvents(request, poifsFileSystem);
} catch (IOException e) { } catch (IOException e) {
@ -145,20 +138,17 @@ public class XlsSaxAnalyser implements HSSFListener, ExcelExecutor {
cellData = handler.getCellData(); cellData = handler.getCellData();
if (cellData != null) { if (cellData != null) {
cellData.checkEmpty(); cellData.checkEmpty();
records.put(thisColumn, cellData); if (CellDataTypeEnum.EMPTY != cellData.getType()) {
records.put(thisColumn, cellData);
}
} }
break; break;
} }
} }
// If we got something to print out, do so // If we got something to print out, do so
if (cellData != null) { if (cellData != null && analysisContext.currentReadHolder().globalConfiguration().getAutoTrim()
if (analysisContext.currentReadHolder().globalConfiguration().getAutoTrim() && CellDataTypeEnum.STRING == cellData.getType()) {
&& CellDataTypeEnum.STRING == cellData.getType()) { cellData.setStringValue(cellData.getStringValue().trim());
cellData.setStringValue(cellData.getStringValue().trim());
}
if (CellDataTypeEnum.EMPTY != cellData.getType()) {
notAllEmpty = true;
}
} }
// Handle new row // Handle new row
@ -193,11 +183,9 @@ public class XlsSaxAnalyser implements HSSFListener, ExcelExecutor {
if (lastColumnNumber == -1) { if (lastColumnNumber == -1) {
lastColumnNumber = 0; lastColumnNumber = 0;
} }
if (notAllEmpty) { analysisContext.readRowHolder(
analysisContext.readRowHolder( new ReadRowHolder(lastRowNumber, analysisContext.readSheetHolder().getGlobalConfiguration()));
new ReadRowHolder(lastRowNumber, analysisContext.readSheetHolder().getGlobalConfiguration())); analysisContext.readSheetHolder().notifyEndOneRow(new EachRowAnalysisFinishEvent(records), analysisContext);
analysisContext.readSheetHolder().notifyEndOneRow(new EachRowAnalysisFinishEvent(records), analysisContext);
}
records.clear(); records.clear();
lastColumnNumber = -1; lastColumnNumber = -1;
} }

37
src/main/java/com/alibaba/excel/analysis/v07/XlsxSaxAnalyser.java

@ -20,15 +20,12 @@ import org.apache.poi.xssf.usermodel.XSSFRelation;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorkbook; import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorkbook;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorkbookPr; import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorkbookPr;
import org.openxmlformats.schemas.spreadsheetml.x2006.main.WorkbookDocument; import org.openxmlformats.schemas.spreadsheetml.x2006.main.WorkbookDocument;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.xml.sax.ContentHandler; import org.xml.sax.ContentHandler;
import org.xml.sax.InputSource; import org.xml.sax.InputSource;
import org.xml.sax.XMLReader; import org.xml.sax.XMLReader;
import com.alibaba.excel.analysis.ExcelExecutor; import com.alibaba.excel.analysis.ExcelExecutor;
import com.alibaba.excel.cache.Ehcache; import com.alibaba.excel.cache.ReadCache;
import com.alibaba.excel.cache.MapCache;
import com.alibaba.excel.context.AnalysisContext; import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.exception.ExcelAnalysisException; import com.alibaba.excel.exception.ExcelAnalysisException;
import com.alibaba.excel.read.metadata.ReadSheet; import com.alibaba.excel.read.metadata.ReadSheet;
@ -41,11 +38,7 @@ import com.alibaba.excel.util.FileUtils;
* @author jipengfei * @author jipengfei
*/ */
public class XlsxSaxAnalyser implements ExcelExecutor { public class XlsxSaxAnalyser implements ExcelExecutor {
private static final Logger LOGGER = LoggerFactory.getLogger(XlsxSaxAnalyser.class);
/**
* If it's less than 5M, use map cache, or use ehcache.
*/
private static final long USE_MAP_CACHE_SIZE = 5 * 1000 * 1000L;
private AnalysisContext analysisContext; private AnalysisContext analysisContext;
private List<ReadSheet> sheetList; private List<ReadSheet> sheetList;
private Map<Integer, InputStream> sheetMap; private Map<Integer, InputStream> sheetMap;
@ -93,28 +86,10 @@ public class XlsxSaxAnalyser implements ExcelExecutor {
} }
} }
private void defaultReadCache(ReadWorkbookHolder readWorkbookHolder, PackagePart sharedStringsTablePackagePart) private void defaultReadCache(ReadWorkbookHolder readWorkbookHolder, PackagePart sharedStringsTablePackagePart) {
throws IOException { ReadCache readCache = readWorkbookHolder.getReadCacheSelector().readCache(sharedStringsTablePackagePart);
if (readWorkbookHolder.getReadCache() != null) { readWorkbookHolder.setReadCache(readCache);
readWorkbookHolder.getReadCache().init(analysisContext); readCache.init(analysisContext);
return;
}
long size = sharedStringsTablePackagePart.getSize();
if (size < 0) {
size = sharedStringsTablePackagePart.getInputStream().available();
}
if (size < USE_MAP_CACHE_SIZE) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Use map cache.size:{}", size);
}
readWorkbookHolder.setReadCache(new MapCache());
} else {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Use ehcache.size:{}", size);
}
readWorkbookHolder.setReadCache(new Ehcache());
}
readWorkbookHolder.getReadCache().init(analysisContext);
} }
private void analysisUse1904WindowDate(XSSFReader xssfReader, ReadWorkbookHolder readWorkbookHolder) private void analysisUse1904WindowDate(XSSFReader xssfReader, ReadWorkbookHolder readWorkbookHolder)

177
src/main/java/com/alibaba/excel/cache/Ehcache.java vendored

@ -2,15 +2,10 @@ package com.alibaba.excel.cache;
import java.io.File; import java.io.File;
import java.util.HashMap; import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Map;
import java.util.Set;
import java.util.UUID; import java.util.UUID;
import org.ehcache.CacheManager; import org.ehcache.CacheManager;
import org.ehcache.PersistentCacheManager; import org.ehcache.config.CacheConfiguration;
import org.ehcache.config.builders.CacheConfigurationBuilder; import org.ehcache.config.builders.CacheConfigurationBuilder;
import org.ehcache.config.builders.CacheManagerBuilder; import org.ehcache.config.builders.CacheManagerBuilder;
import org.ehcache.config.builders.ResourcePoolsBuilder; import org.ehcache.config.builders.ResourcePoolsBuilder;
@ -19,8 +14,8 @@ import org.slf4j.Logger;
import org.slf4j.LoggerFactory; import org.slf4j.LoggerFactory;
import com.alibaba.excel.context.AnalysisContext; import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.util.CollectionUtils;
import com.alibaba.excel.util.FileUtils; import com.alibaba.excel.util.FileUtils;
import com.alibaba.excel.util.StringUtils;
/** /**
* Default cache * Default cache
@ -30,79 +25,64 @@ import com.alibaba.excel.util.StringUtils;
public class Ehcache implements ReadCache { public class Ehcache implements ReadCache {
private static final Logger LOGGER = LoggerFactory.getLogger(Ehcache.class); private static final Logger LOGGER = LoggerFactory.getLogger(Ehcache.class);
private static final int BATCH_COUNT = 1000; private static final int BATCH_COUNT = 1000;
private static final int CHECK_INTERVAL = 500;
private static final int MAX_CACHE_ACTIVATE = 10;
private static final String CACHE = "cache";
private static final String DATA_SEPARATOR = "@";
private static final String KEY_VALUE_SEPARATOR = "!";
private static final String SPECIAL_SEPARATOR = "&";
private static final String ESCAPED_DATA_SEPARATOR = "&d;";
private static final String ESCAPED_KEY_VALUE_SEPARATOR = "&kv;";
private static final String ESCAPED_SPECIAL_SEPARATOR = "&s;";
private static final int DEBUG_WRITE_SIZE = 100 * 10000; private static final int DEBUG_WRITE_SIZE = 100 * 10000;
private static final int DEBUG_CACHE_MISS_SIZE = 1000; private static final int DEBUG_CACHE_MISS_SIZE = 1000;
/** /**
* Key index * Key index
*/ */
private int index = 0; private int index = 0;
private StringBuilder data = new StringBuilder(); private HashMap<Integer, String> dataMap = new HashMap<Integer, String>(BATCH_COUNT * 4 / 3 + 1);
private CacheManager cacheManager; private static CacheManager fileCacheManager;
private static CacheConfiguration<Integer, HashMap> fileCacheConfiguration;
private static CacheManager activeCacheManager;
private CacheConfiguration<Integer, HashMap> activeCacheConfiguration;
/** /**
* Bulk storage data * Bulk storage data
*/ */
private org.ehcache.Cache<Integer, String> cache; private org.ehcache.Cache<Integer, HashMap> fileCache;
/** /**
* Currently active cache * Currently active cache
*/ */
private Map<Integer, Map<Integer, String>> cacheMap = new HashMap<Integer, Map<Integer, String>>(); private org.ehcache.Cache<Integer, HashMap> activeCache;
/** private String cacheAlias;
* Count how many times get
*/
private int getCount = 0;
/**
* Count active cache
*
*/
private LinkedList<Integer> countList = new LinkedList<Integer>();
/**
* Count the last {@link #CHECK_INTERVAL} used
*/
private Set<Integer> lastCheckIntervalUsedSet = new HashSet<Integer>();
/** /**
* Count the number of cache misses * Count the number of cache misses
*/ */
private int cacheMiss = 0; private int cacheMiss = 0;
public Ehcache(int maxCacheActivateSize) {
activeCacheConfiguration = CacheConfigurationBuilder
.newCacheConfigurationBuilder(Integer.class, HashMap.class,
ResourcePoolsBuilder.newResourcePoolsBuilder().heap(maxCacheActivateSize, MemoryUnit.MB))
.withSizeOfMaxObjectGraph(1000 * 1000L).withSizeOfMaxObjectSize(maxCacheActivateSize, MemoryUnit.MB)
.build();
}
static {
File cacheFile = FileUtils.createCacheTmpFile();
fileCacheManager =
CacheManagerBuilder.newCacheManagerBuilder().with(CacheManagerBuilder.persistence(cacheFile)).build(true);
activeCacheManager = CacheManagerBuilder.newCacheManagerBuilder().build(true);
fileCacheConfiguration = CacheConfigurationBuilder
.newCacheConfigurationBuilder(Integer.class, HashMap.class,
ResourcePoolsBuilder.newResourcePoolsBuilder().disk(10, MemoryUnit.GB))
.withSizeOfMaxObjectGraph(1000 * 1000L).withSizeOfMaxObjectSize(10, MemoryUnit.GB).build();
}
@Override @Override
public void init(AnalysisContext analysisContext) { public void init(AnalysisContext analysisContext) {
File readTempFile = analysisContext.readWorkbookHolder().getTempFile(); cacheAlias = UUID.randomUUID().toString();
if (readTempFile == null) { fileCache = fileCacheManager.createCache(cacheAlias, fileCacheConfiguration);
readTempFile = FileUtils.createCacheTmpFile(); activeCache = activeCacheManager.createCache(cacheAlias, activeCacheConfiguration);
analysisContext.readWorkbookHolder().setTempFile(readTempFile);
}
File cacheFile = new File(readTempFile.getPath(), UUID.randomUUID().toString());
PersistentCacheManager persistentCacheManager =
CacheManagerBuilder.newCacheManagerBuilder().with(CacheManagerBuilder.persistence(cacheFile))
.withCache(CACHE, CacheConfigurationBuilder.newCacheConfigurationBuilder(Integer.class, String.class,
ResourcePoolsBuilder.newResourcePoolsBuilder().disk(10, MemoryUnit.GB)))
.build(true);
cacheManager = persistentCacheManager;
cache = persistentCacheManager.getCache(CACHE, Integer.class, String.class);
} }
@Override @Override
public void put(String value) { public void put(String value) {
data.append(index).append(KEY_VALUE_SEPARATOR).append(escape(value)).append(DATA_SEPARATOR); dataMap.put(index, value);
if ((index + 1) % BATCH_COUNT == 0) { if ((index + 1) % BATCH_COUNT == 0) {
cache.put(index / BATCH_COUNT, data.toString()); fileCache.put(index / BATCH_COUNT, dataMap);
data = new StringBuilder(); dataMap = new HashMap<Integer, String>(BATCH_COUNT * 4 / 3 + 1);
} }
index++; index++;
if (LOGGER.isDebugEnabled()) { if (LOGGER.isDebugEnabled()) {
@ -112,102 +92,37 @@ public class Ehcache implements ReadCache {
} }
} }
private String escape(String str) {
if (StringUtils.isEmpty(str)) {
return str;
}
str = str.replaceAll(SPECIAL_SEPARATOR, ESCAPED_SPECIAL_SEPARATOR);
str = str.replaceAll(DATA_SEPARATOR, ESCAPED_DATA_SEPARATOR);
str = str.replaceAll(KEY_VALUE_SEPARATOR, ESCAPED_KEY_VALUE_SEPARATOR);
return str;
}
private String unescape(String str) {
if (StringUtils.isEmpty(str)) {
return str;
}
str = str.replaceAll(ESCAPED_KEY_VALUE_SEPARATOR, KEY_VALUE_SEPARATOR);
str = str.replaceAll(ESCAPED_DATA_SEPARATOR, DATA_SEPARATOR);
str = str.replaceAll(ESCAPED_SPECIAL_SEPARATOR, SPECIAL_SEPARATOR);
return str;
}
@Override @Override
public String get(Integer key) { public String get(Integer key) {
if (key == null || key < 0) { if (key == null || key < 0) {
return null; return null;
} }
getCount++;
int route = key / BATCH_COUNT; int route = key / BATCH_COUNT;
if (cacheMap.containsKey(route)) { HashMap<Integer, String> dataMap = activeCache.get(route);
lastCheckIntervalUsedSet.add(route); if (dataMap == null) {
String value = cacheMap.get(route).get(key); dataMap = fileCache.get(route);
checkClear(); activeCache.put(route, dataMap);
return value;
}
Map<Integer, String> tempCacheMap = new HashMap<Integer, String>(BATCH_COUNT / 3 * 4 + 1);
String batchData = cache.get(route);
String[] dataStrings = batchData.split(DATA_SEPARATOR);
for (String dataString : dataStrings) {
String[] keyValue = dataString.split(KEY_VALUE_SEPARATOR);
tempCacheMap.put(Integer.valueOf(keyValue[0]), unescape(keyValue[1]));
}
countList.add(route);
cacheMap.put(route, tempCacheMap);
if (LOGGER.isDebugEnabled()) {
if (cacheMiss++ % DEBUG_CACHE_MISS_SIZE == 0) {
LOGGER.debug("Cache misses count:{}", cacheMiss);
}
}
lastCheckIntervalUsedSet.add(route);
String value = tempCacheMap.get(key);
checkClear();
return value;
}
private void checkClear() {
if (countList.size() > MAX_CACHE_ACTIVATE) {
Integer route = countList.getFirst();
countList.removeFirst();
cacheMap.remove(route);
}
if (getCount++ % CHECK_INTERVAL != 0) {
return;
}
Iterator<Map.Entry<Integer, Map<Integer, String>>> iterator = cacheMap.entrySet().iterator();
while (iterator.hasNext()) {
Map.Entry<Integer, Map<Integer, String>> entry = iterator.next();
if (lastCheckIntervalUsedSet.contains(entry.getKey())) {
continue;
}
// Last 'CHECK_INTERVAL' not use
iterator.remove();
if (LOGGER.isDebugEnabled()) { if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Cache remove because {} times unused.", CHECK_INTERVAL); if (cacheMiss++ % DEBUG_CACHE_MISS_SIZE == 0) {
} LOGGER.debug("Cache misses count:{}", cacheMiss);
Iterator<Integer> countIterator = countList.iterator();
while (countIterator.hasNext()) {
Integer route = countIterator.next();
if (route.equals(entry.getKey())) {
countIterator.remove();
break;
} }
} }
} }
lastCheckIntervalUsedSet.clear(); return dataMap.get(key);
} }
@Override @Override
public void putFinished() { public void putFinished() {
if (StringUtils.isEmpty(data.toString())) { if (CollectionUtils.isEmpty(dataMap)) {
return; return;
} }
cache.put(index / BATCH_COUNT, data.toString()); fileCache.put(index / BATCH_COUNT, dataMap);
} }
@Override @Override
public void destroy() { public void destroy() {
cacheManager.close(); fileCacheManager.removeCache(cacheAlias);
activeCacheManager.removeCache(cacheAlias);
} }
} }

23
src/main/java/com/alibaba/excel/cache/selector/EternalReadCacheSelector.java vendored

@ -0,0 +1,23 @@
package com.alibaba.excel.cache.selector;
import org.apache.poi.openxml4j.opc.PackagePart;
import com.alibaba.excel.cache.ReadCache;
/**
* Choose a eternal cache
*
* @author Jiaju Zhuang
**/
public class EternalReadCacheSelector implements ReadCacheSelector {
private ReadCache readCache;
public EternalReadCacheSelector(ReadCache readCache) {
this.readCache = readCache;
}
@Override
public ReadCache readCache(PackagePart sharedStringsTablePackagePart) {
return readCache;
}
}

21
src/main/java/com/alibaba/excel/cache/selector/ReadCacheSelector.java vendored

@ -0,0 +1,21 @@
package com.alibaba.excel.cache.selector;
import org.apache.poi.openxml4j.opc.PackagePart;
import com.alibaba.excel.cache.ReadCache;
/**
* Select the cache
*
* @author Jiaju Zhuang
**/
public interface ReadCacheSelector {
/**
* Select a cache
*
* @param sharedStringsTablePackagePart
* @return
*/
ReadCache readCache(PackagePart sharedStringsTablePackagePart);
}

82
src/main/java/com/alibaba/excel/cache/selector/SimpleReadCacheSelector.java vendored

@ -0,0 +1,82 @@
package com.alibaba.excel.cache.selector;
import java.io.IOException;
import org.apache.poi.openxml4j.opc.PackagePart;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.alibaba.excel.cache.Ehcache;
import com.alibaba.excel.cache.MapCache;
import com.alibaba.excel.cache.ReadCache;
/**
* Simple cache selector
*
* @author Jiaju Zhuang
**/
public class SimpleReadCacheSelector implements ReadCacheSelector {
private static final Logger LOGGER = LoggerFactory.getLogger(SimpleReadCacheSelector.class);
/**
* Convert bytes to megabytes
*/
private static final long B2M = 1000 * 1000L;
/**
* If it's less than 5M, use map cache, or use ehcache.unit MB.
*/
private static final int DEFAULT_MAX_USE_MAP_CACHE_SIZE = 5;
/**
* Maximum size of cache activation.unit MB.
*/
private static final int DEFAULT_MAX_EHCACHE_ACTIVATE_SIZE = 20;
/**
* Shared strings exceeding this value will use {@link Ehcache},or use {@link MapCache}.unit MB.
*/
private long maxUseMapCacheSize;
/**
* Maximum size of cache activation.unit MB.
*/
private int maxCacheActivateSize;
public SimpleReadCacheSelector() {
this(DEFAULT_MAX_USE_MAP_CACHE_SIZE, DEFAULT_MAX_EHCACHE_ACTIVATE_SIZE);
}
public SimpleReadCacheSelector(long maxUseMapCacheSize, int maxCacheActivateSize) {
if (maxUseMapCacheSize <= 0) {
this.maxUseMapCacheSize = DEFAULT_MAX_USE_MAP_CACHE_SIZE;
} else {
this.maxUseMapCacheSize = maxUseMapCacheSize;
}
if (maxCacheActivateSize <= 0) {
this.maxCacheActivateSize = DEFAULT_MAX_EHCACHE_ACTIVATE_SIZE;
} else {
this.maxCacheActivateSize = maxCacheActivateSize;
}
}
@Override
public ReadCache readCache(PackagePart sharedStringsTablePackagePart) {
long size = sharedStringsTablePackagePart.getSize();
if (size < 0) {
try {
size = sharedStringsTablePackagePart.getInputStream().available();
} catch (IOException e) {
LOGGER.warn("Unable to get file size, default used MapCache");
return new MapCache();
}
}
if (size < maxUseMapCacheSize * B2M) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Use map cache.size:{}", size);
}
return new MapCache();
}
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Use ehcache.size:{}", size);
}
return new Ehcache(maxCacheActivateSize);
}
}

25
src/main/java/com/alibaba/excel/read/builder/ExcelReaderBuilder.java

@ -7,6 +7,7 @@ import java.util.List;
import com.alibaba.excel.ExcelReader; import com.alibaba.excel.ExcelReader;
import com.alibaba.excel.cache.ReadCache; import com.alibaba.excel.cache.ReadCache;
import com.alibaba.excel.cache.selector.ReadCacheSelector;
import com.alibaba.excel.context.AnalysisContext; import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.converters.Converter; import com.alibaba.excel.converters.Converter;
import com.alibaba.excel.event.AnalysisEventListener; import com.alibaba.excel.event.AnalysisEventListener;
@ -84,6 +85,17 @@ public class ExcelReaderBuilder {
return this; return this;
} }
/**
* Ignore empty rows.Default is true.
*
* @param ignoreEmptyRow
* @return
*/
public ExcelReaderBuilder ignoreEmptyRow(Boolean ignoreEmptyRow) {
readWorkbook.setIgnoreEmptyRow(ignoreEmptyRow);
return this;
}
/** /**
* This object can be read in the Listener {@link AnalysisEventListener#invoke(Object, AnalysisContext)} * This object can be read in the Listener {@link AnalysisEventListener#invoke(Object, AnalysisContext)}
* {@link AnalysisContext#getCustom()} * {@link AnalysisContext#getCustom()}
@ -97,7 +109,7 @@ public class ExcelReaderBuilder {
} }
/** /**
* A cache that stores temp data to save memory.Default use {@link com.alibaba.excel.cache.Ehcache} * A cache that stores temp data to save memory.
* *
* @param readCache * @param readCache
* @return * @return
@ -107,6 +119,17 @@ public class ExcelReaderBuilder {
return this; return this;
} }
/**
* Select the cache.Default use {@link com.alibaba.excel.cache.selector.SimpleReadCacheSelector}
*
* @param readCacheSelector
* @return
*/
public ExcelReaderBuilder readCacheSelector(ReadCacheSelector readCacheSelector) {
readWorkbook.setReadCacheSelector(readCacheSelector);
return this;
}
/** /**
* Count the number of added heads when read sheet. * Count the number of added heads when read sheet.
* *

27
src/main/java/com/alibaba/excel/read/metadata/ReadWorkbook.java

@ -4,6 +4,7 @@ import java.io.File;
import java.io.InputStream; import java.io.InputStream;
import com.alibaba.excel.cache.ReadCache; import com.alibaba.excel.cache.ReadCache;
import com.alibaba.excel.cache.selector.ReadCacheSelector;
import com.alibaba.excel.context.AnalysisContext; import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener; import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.support.ExcelTypeEnum; import com.alibaba.excel.support.ExcelTypeEnum;
@ -47,9 +48,17 @@ public class ReadWorkbook extends ReadBasicParameter {
*/ */
private Object customObject; private Object customObject;
/** /**
* A cache that stores temp data to save memory.Default use {@link com.alibaba.excel.cache.Ehcache} * A cache that stores temp data to save memory.
*/ */
private ReadCache readCache; private ReadCache readCache;
/**
* Ignore empty rows.Default is true.
*/
private Boolean ignoreEmptyRow;
/**
* Select the cache.Default use {@link com.alibaba.excel.cache.selector.SimpleReadCacheSelector}
*/
private ReadCacheSelector readCacheSelector;
/** /**
* The default is all excel objects.Default is true. * The default is all excel objects.Default is true.
* <p> * <p>
@ -139,4 +148,20 @@ public class ReadWorkbook extends ReadBasicParameter {
public void setDefaultReturnMap(Boolean defaultReturnMap) { public void setDefaultReturnMap(Boolean defaultReturnMap) {
this.defaultReturnMap = defaultReturnMap; this.defaultReturnMap = defaultReturnMap;
} }
public Boolean getIgnoreEmptyRow() {
return ignoreEmptyRow;
}
public void setIgnoreEmptyRow(Boolean ignoreEmptyRow) {
this.ignoreEmptyRow = ignoreEmptyRow;
}
public ReadCacheSelector getReadCacheSelector() {
return readCacheSelector;
}
public void setReadCacheSelector(ReadCacheSelector readCacheSelector) {
this.readCacheSelector = readCacheSelector;
}
} }

16
src/main/java/com/alibaba/excel/read/metadata/holder/AbstractReadHolder.java

@ -5,17 +5,18 @@ import java.util.HashMap;
import java.util.List; import java.util.List;
import java.util.Map; import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.alibaba.excel.context.AnalysisContext; import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.converters.Converter; import com.alibaba.excel.converters.Converter;
import com.alibaba.excel.converters.ConverterKeyBuild; import com.alibaba.excel.converters.ConverterKeyBuild;
import com.alibaba.excel.converters.DefaultConverterLoader; import com.alibaba.excel.converters.DefaultConverterLoader;
import com.alibaba.excel.enums.CellDataTypeEnum;
import com.alibaba.excel.enums.HeadKindEnum; import com.alibaba.excel.enums.HeadKindEnum;
import com.alibaba.excel.enums.HolderEnum; import com.alibaba.excel.enums.HolderEnum;
import com.alibaba.excel.event.AnalysisEventListener; import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.excel.exception.ExcelAnalysisException; import com.alibaba.excel.exception.ExcelAnalysisException;
import com.alibaba.excel.exception.ExcelAnalysisStopException; import com.alibaba.excel.exception.ExcelAnalysisStopException;
import com.alibaba.excel.exception.ExcelDataConvertException;
import com.alibaba.excel.metadata.AbstractHolder; import com.alibaba.excel.metadata.AbstractHolder;
import com.alibaba.excel.metadata.CellData; import com.alibaba.excel.metadata.CellData;
import com.alibaba.excel.metadata.Head; import com.alibaba.excel.metadata.Head;
@ -26,6 +27,7 @@ import com.alibaba.excel.read.listener.ReadListenerRegistryCenter;
import com.alibaba.excel.read.listener.event.AnalysisFinishEvent; import com.alibaba.excel.read.listener.event.AnalysisFinishEvent;
import com.alibaba.excel.read.metadata.ReadBasicParameter; import com.alibaba.excel.read.metadata.ReadBasicParameter;
import com.alibaba.excel.read.metadata.property.ExcelReadHeadProperty; import com.alibaba.excel.read.metadata.property.ExcelReadHeadProperty;
import com.alibaba.excel.util.CollectionUtils;
import com.alibaba.excel.util.ConverterUtils; import com.alibaba.excel.util.ConverterUtils;
import com.alibaba.excel.util.StringUtils; import com.alibaba.excel.util.StringUtils;
@ -35,6 +37,8 @@ import com.alibaba.excel.util.StringUtils;
* @author Jiaju Zhuang * @author Jiaju Zhuang
*/ */
public abstract class AbstractReadHolder extends AbstractHolder implements ReadHolder, ReadListenerRegistryCenter { public abstract class AbstractReadHolder extends AbstractHolder implements ReadHolder, ReadListenerRegistryCenter {
private static final Logger LOGGER = LoggerFactory.getLogger(AbstractReadHolder.class);
/** /**
* Count the number of added heads when read sheet. * Count the number of added heads when read sheet.
* *
@ -117,6 +121,14 @@ public abstract class AbstractReadHolder extends AbstractHolder implements ReadH
@Override @Override
public void notifyEndOneRow(AnalysisFinishEvent event, AnalysisContext analysisContext) { public void notifyEndOneRow(AnalysisFinishEvent event, AnalysisContext analysisContext) {
Map<Integer, CellData> cellDataMap = event.getAnalysisResult(); Map<Integer, CellData> cellDataMap = event.getAnalysisResult();
if (CollectionUtils.isEmpty(cellDataMap)) {
if (LOGGER.isDebugEnabled()) {
LOGGER.warn("Empty row!");
}
if (analysisContext.readWorkbookHolder().getIgnoreEmptyRow()) {
return;
}
}
ReadRowHolder readRowHolder = analysisContext.readRowHolder(); ReadRowHolder readRowHolder = analysisContext.readRowHolder();
readRowHolder.setCurrentRowAnalysisResult(cellDataMap); readRowHolder.setCurrentRowAnalysisResult(cellDataMap);
int rowIndex = readRowHolder.getRowIndex(); int rowIndex = readRowHolder.getRowIndex();

49
src/main/java/com/alibaba/excel/read/metadata/holder/ReadWorkbookHolder.java

@ -12,6 +12,9 @@ import org.slf4j.Logger;
import org.slf4j.LoggerFactory; import org.slf4j.LoggerFactory;
import com.alibaba.excel.cache.ReadCache; import com.alibaba.excel.cache.ReadCache;
import com.alibaba.excel.cache.selector.EternalReadCacheSelector;
import com.alibaba.excel.cache.selector.ReadCacheSelector;
import com.alibaba.excel.cache.selector.SimpleReadCacheSelector;
import com.alibaba.excel.context.AnalysisContext; import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.enums.HolderEnum; import com.alibaba.excel.enums.HolderEnum;
import com.alibaba.excel.event.AnalysisEventListener; import com.alibaba.excel.event.AnalysisEventListener;
@ -64,10 +67,17 @@ public class ReadWorkbookHolder extends AbstractReadHolder {
*/ */
private Object customObject; private Object customObject;
/** /**
* A cache that stores temp data to save memory.Default use {@link com.alibaba.excel.cache.Ehcache} * Ignore empty rows.Default is true.
*/
private Boolean ignoreEmptyRow;
/**
* A cache that stores temp data to save memory.
*/ */
private ReadCache readCache; private ReadCache readCache;
/**
* Select the cache.Default use {@link com.alibaba.excel.cache.selector.SimpleReadCacheSelector}
*/
private ReadCacheSelector readCacheSelector;
/** /**
* Temporary files when reading excel * Temporary files when reading excel
*/ */
@ -140,9 +150,22 @@ public class ReadWorkbookHolder extends AbstractReadHolder {
getGlobalConfiguration().setUse1904windowing(Boolean.FALSE); getGlobalConfiguration().setUse1904windowing(Boolean.FALSE);
} }
this.customObject = readWorkbook.getCustomObject(); this.customObject = readWorkbook.getCustomObject();
this.readCache = readWorkbook.getReadCache(); if (readWorkbook.getIgnoreEmptyRow() == null) {
if (readCache != null && ExcelTypeEnum.XLS == excelType) { this.ignoreEmptyRow = Boolean.TRUE;
LOGGER.warn("Xls not support 'readCache'!"); } else {
this.ignoreEmptyRow = readWorkbook.getIgnoreEmptyRow();
}
if (readWorkbook.getReadCache() != null) {
if (readWorkbook.getReadCacheSelector() != null) {
throw new ExcelAnalysisException("'readCache' and 'readCacheSelector' only one choice.");
}
this.readCacheSelector = new EternalReadCacheSelector(readWorkbook.getReadCache());
} else {
if (readWorkbook.getReadCacheSelector() == null) {
this.readCacheSelector = new SimpleReadCacheSelector();
} else {
this.readCacheSelector = readWorkbook.getReadCacheSelector();
}
} }
if (readWorkbook.getDefaultReturnMap() == null) { if (readWorkbook.getDefaultReturnMap() == null) {
this.defaultReturnMap = Boolean.TRUE; this.defaultReturnMap = Boolean.TRUE;
@ -201,6 +224,14 @@ public class ReadWorkbookHolder extends AbstractReadHolder {
this.customObject = customObject; this.customObject = customObject;
} }
public Boolean getIgnoreEmptyRow() {
return ignoreEmptyRow;
}
public void setIgnoreEmptyRow(Boolean ignoreEmptyRow) {
this.ignoreEmptyRow = ignoreEmptyRow;
}
public ReadCache getReadCache() { public ReadCache getReadCache() {
return readCache; return readCache;
} }
@ -209,6 +240,14 @@ public class ReadWorkbookHolder extends AbstractReadHolder {
this.readCache = readCache; this.readCache = readCache;
} }
public ReadCacheSelector getReadCacheSelector() {
return readCacheSelector;
}
public void setReadCacheSelector(ReadCacheSelector readCacheSelector) {
this.readCacheSelector = readCacheSelector;
}
public Boolean getMandatoryUseInputStream() { public Boolean getMandatoryUseInputStream() {
return mandatoryUseInputStream; return mandatoryUseInputStream;
} }

62
src/test/java/com/alibaba/easyexcel/test/temp/cache/CacheTest.java vendored

@ -0,0 +1,62 @@
package com.alibaba.easyexcel.test.temp.cache;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import org.apache.poi.xssf.streaming.SXSSFRow;
import org.apache.poi.xssf.streaming.SXSSFSheet;
import org.apache.poi.xssf.streaming.SXSSFWorkbook;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.ehcache.Cache;
import org.ehcache.PersistentCacheManager;
import org.ehcache.config.builders.CacheConfigurationBuilder;
import org.ehcache.config.builders.CacheManagerBuilder;
import org.ehcache.config.builders.ResourcePoolsBuilder;
import org.ehcache.config.units.MemoryUnit;
import org.junit.Ignore;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.alibaba.easyexcel.test.temp.poi.Poi2Test;
import com.alibaba.excel.util.FileUtils;
import com.alibaba.fastjson.JSON;
/**
*
* @author Jiaju Zhuang
**/
@Ignore
public class CacheTest {
private static final Logger LOGGER = LoggerFactory.getLogger(Poi2Test.class);
@Test
public void cache() throws Exception {
File readTempFile = FileUtils.createCacheTmpFile();
File cacheFile = new File(readTempFile.getPath(), UUID.randomUUID().toString());
PersistentCacheManager persistentCacheManager =
CacheManagerBuilder.newCacheManagerBuilder().with(CacheManagerBuilder.persistence(cacheFile))
.withCache("cache", CacheConfigurationBuilder.newCacheConfigurationBuilder(Integer.class, HashMap.class,
ResourcePoolsBuilder.newResourcePoolsBuilder().disk(10, MemoryUnit.GB)))
.build(true);
Cache<Integer, HashMap> cache = persistentCacheManager.getCache("cache", Integer.class, HashMap.class);
HashMap<Integer, String> map = new HashMap<Integer, String>();
map.put(1, "test");
cache.put(1, map);
LOGGER.info("dd1:{}", JSON.toJSONString(cache.get(1)));
cache.clear();
LOGGER.info("dd2:{}", JSON.toJSONString(cache.get(1)));
}
}

60
src/test/java/com/alibaba/easyexcel/test/temp/large/LargeData.java

@ -0,0 +1,60 @@
package com.alibaba.easyexcel.test.temp.large;
import lombok.Data;
/**
* @author Jiaju Zhuang
*/
@Data
public class LargeData {
private String str1;
private String str2;
private String str3;
private String str4;
private String str5;
private String str6;
private String str7;
private String str8;
private String str9;
private String str10;
private String str11;
private String str12;
private String str13;
private String str14;
private String str15;
private String str16;
private String str17;
private String str18;
private String str19;
private String str20;
private String str21;
private String str22;
private String str23;
private String str24;
private String str25;
}

33
src/test/java/com/alibaba/easyexcel/test/temp/large/LargeDataListener.java

@ -0,0 +1,33 @@
package com.alibaba.easyexcel.test.temp.large;
import org.junit.Assert;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.alibaba.fastjson.JSON;
/**
* @author Jiaju Zhuang
*/
public class LargeDataListener extends AnalysisEventListener<LargeData> {
private static final Logger LOGGER = LoggerFactory.getLogger(LargeDataListener.class);
private int count = 0;
@Override
public void invoke(LargeData data, AnalysisContext context) {
if (count == 0) {
LOGGER.info("First row:{}", JSON.toJSONString(data));
}
count++;
if (count % 100000 == 0) {
LOGGER.info("Already read:{}", count);
}
}
@Override
public void doAfterAllAnalysed(AnalysisContext context) {
LOGGER.info("Large row count:{}", count);
}
}

28
src/test/java/com/alibaba/easyexcel/test/temp/large/TempLargeDataTest.java

@ -0,0 +1,28 @@
package com.alibaba.easyexcel.test.temp.large;
import java.io.FileInputStream;
import org.junit.Ignore;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.alibaba.easyexcel.test.core.large.LargeDataTest;
import com.alibaba.excel.EasyExcel;
/**
*
* @author Jiaju Zhuang
*/
@Ignore
public class TempLargeDataTest {
private static final Logger LOGGER = LoggerFactory.getLogger(LargeDataTest.class);
@Test
public void read() throws Exception {
long start = System.currentTimeMillis();
EasyExcel.read(new FileInputStream("D:\\test\\MRP生产视图(1).xlsx"), LargeData.class, new LargeDataListener())
.headRowNumber(2).sheet().doRead();
LOGGER.info("Large data total time spent:{}", System.currentTimeMillis() - start);
}
}

4
src/test/java/com/alibaba/easyexcel/test/temp/simple/HgTest.java

@ -46,8 +46,8 @@ public class HgTest {
@Test @Test
public void hh2() throws IOException { public void hh2() throws IOException {
EasyExcel.read(new FileInputStream("D:\\test\\商户不匹配工单信息收集表格.xlsx")) EasyExcel.read(new FileInputStream("D:\\test\\商户不匹配工单信息收集表格.xlsx")).registerReadListener(new HgListener())
.registerReadListener(new HgListener()).headRowNumber(0).sheet().doRead(); .headRowNumber(0).sheet().doRead();
} }
} }

6
update.md

@ -3,6 +3,12 @@
* 新增支持读取单元格类型、写入指定单元格类型 * 新增支持读取单元格类型、写入指定单元格类型
* 支持通过模板填充数据 * 支持通过模板填充数据
# 2.0.5
* 优化07版超大文件读取方案
* 支持自己设置超大文件读取参数
* 读取xlsx会改变修改时间的bug [Issue #574](https://github.com/alibaba/easyexcel/issues/574)
* 默认读取忽略空行 根据参数ignoreEmptyRow参数设置
# 2.0.4 # 2.0.4
* 修复07版整个excel仅存在数字时会出现的NPE * 修复07版整个excel仅存在数字时会出现的NPE
* 修复03版 用String接收电话会出现科学计数法的问题 * 修复03版 用String接收电话会出现科学计数法的问题

Loading…
Cancel
Save