forked from github/easyexcel
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3.1 KiB
3.1 KiB
JAVA解析Excel工具easyexcel
Java解析、生成Excel比较有名的框架有Apache poi、jxl。但他们都存在一个严重的问题就是非常的耗内存,poi有一套SAX模式的API可以一定程度的解决一些内存溢出的问题,但POI还是有一些缺陷,比如07版Excel解压缩以及解压后存储都是在内存中完成的,内存消耗依然很大。easyexcel重写了poi对07版Excel的解析,能够原本一个3M的excel用POI sax依然需要100M左右内存降低到KB级别,并且再大的excel不会出现内存溢出,03版依赖POI的sax模式。在上层做了模型转换的封装,让使用者更加简单方便
相关文档
二方包
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>easyexcel</artifactId>
<version>{latestVersion}</version>
</dependency>
最新版本
VERSION : 1.0.1
维护者
姬朋飞(玉霄)
快速开始
读Excel
public void noModelMultipleSheet() {
InputStream inputStream = getInputStream("2007NoModelMultipleSheet.xlsx");
try {
ExcelReader reader = new ExcelReader(inputStream, ExcelTypeEnum.XLSX, null,
new AnalysisEventListener<List<String>>() {
@Override
public void invoke(List<String> object, AnalysisContext context) {
System.out.println(
"当前sheet:" + context.getCurrentSheet().getSheetNo() + " 当前行:" + context.getCurrentRowNum()
+ " data:" + object);
}
@Override
public void doAfterAllAnalysed(AnalysisContext context) {
}
});
reader.read();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
写Excel
@Test
public void test1() throws FileNotFoundException {
OutputStream out = new FileOutputStream("/Users/jipengfei/78.xlsx");
try {
ExcelWriter writer = new ExcelWriter(out, ExcelTypeEnum.XLSX);
//写第一个sheet, sheet1 数据全是List<String> 无模型映射关系
Sheet sheet1 = new Sheet(1, 0,ExcelPropertyIndexModel.class);
writer.write(getData(), sheet1);
writer.finish();
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}