添加了javadoc和对method的测试

src/main/java/com/alibaba/excel/util/NumberUtils.java

@@ -95,11 +95,11 @@ public class NumberUtils {
     }
 
     /**
-     * parse
+     * parse Integer from string
      *
-     * @param string
-     * @param contentProperty
-     * @return
+     * @param string An integer read in string format
+     * @param contentProperty Properties of the content read in
+     * @return An integer converted from a string
      */
     public static Integer parseInteger(String string, ExcelContentProperty contentProperty) throws ParseException {
         if (!hasFormat(contentProperty)) {

src/test/java/com/alibaba/easyexcel/test/temp/issue2443/Issue2443Test.java

@@ -1,14 +1,17 @@
 package com.alibaba.easyexcel.test.temp.issue2443;
 
 import com.alibaba.easyexcel.test.util.TestFileUtil;
+import com.alibaba.excel.metadata.property.ExcelContentProperty;
+import com.alibaba.excel.util.NumberUtils;
 import com.alibaba.excel.EasyExcel;
 import com.alibaba.excel.read.listener.PageReadListener;
 import com.alibaba.fastjson.JSON;
 import lombok.extern.slf4j.Slf4j;
 import org.junit.Ignore;
 import org.junit.Test;
-
+import static org.junit.Assert.*;
 import java.io.File;
+import java.text.ParseException;
 
 @Ignore
 @Slf4j
@@ -33,4 +36,21 @@ public class Issue2443Test {
             }
         })).sheet().doRead();
     }
+
+    @Test
+    public void parseIntegerTest1() throws ParseException {
+        String string = "1.00";
+        ExcelContentProperty contentProperty = null;
+        int Int = NumberUtils.parseInteger(string,contentProperty);
+        assertEquals(1, Int);
+    }
+
+    @Test
+    public void parseIntegerTest2() throws ParseException {
+        String string = "2.00";
+        ExcelContentProperty contentProperty = null;
+        int Int = NumberUtils.parseInteger(string,contentProperty);
+        assertEquals(2, Int);
+    }
+
 }