首先必须下载Jxl.jar
//传进去的str 为json数据
package com.runlin.analysis.util;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLEncoder;
import java.text.DecimalFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import javax.servlet.http.HttpServletResponse;
import jxl.Workbook;
import jxl.write.Label;
import jxl.write.WritableCellFormat;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;
public class ExcelWriter {
WritableWorkbook wwb = null;
WritableSheet ws = null;
WritableCellFormat cellFormat = null;
String Path = "d:\\";
String fileName;
public ExcelWriter() {
fileName = System.currentTimeMillis() + ".xls";
try {
// 首先要使用Workbook类的工厂方法创建一个可写入的工作薄(Workbook)对象
wwb = Workbook.createWorkbook(new File(Path + fileName));
} catch (IOException e) {
e.printStackTrace();
}
if (wwb != null) {
// 创建一个可写入的工作表
// Workbook的createSheet方法有两个参数,第一个是工作表的名称,第二个是工作表在工作薄中的位置
ws = wwb.createSheet("sheet1", 0);
}
cellFormat = new WritableCellFormat();
try {
cellFormat.setAlignment(jxl.format.Alignment.CENTRE);
} catch (WriteException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 合并单元格并添加内容
*
* @param arg0
* @param arg1
* @param arg2
* @param arg3
* @param str
* @throws RowsExceededException
* @throws WriteException
*/
public void combine(int arg0, int arg1, int arg2, int arg3, String str)
throws RowsExceededException, WriteException {
//合并单元格方法
ws.mergeCells(arg0, arg1, arg2, arg3);
addLabel(arg0, arg1, str);
}
/**
* 添加一个单元格
*
* @param column
* @param row
* @param str
*/
public void addLabel(int column, int row, Object str) {
if (str == null) {
str = "";
}
try {
ws.addCell(new Label(column, row, str.toString(), cellFormat));
} catch (RowsExceededException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (WriteException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 添加一个数字
*
* @param column
* @param row
* @param str
*/
public void addNumberLabel(int column, int row, Object str) {
if (str == null) {
str = "0";
}
try {
ws.addCell(new Label(column, row, str.toString(), cellFormat));
} catch (RowsExceededException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (WriteException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public void addNumberLabel(int column, int row, int i) {
try {
ws.addCell(new Label(column, row, i + "", cellFormat));
} catch (RowsExceededException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (WriteException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 添加一行,row为行号 str为逗号分隔的字符串
*
* @param row
* @param str
*/
public void addRow(int row, String str) {
String[] strArray = str.split(",");
for (int i = 0; i < strArray.length; i++) {
addLabel(i, row, strArray[i]);
}
}
/**
* 保存
*
* @throws IOException
*/
public void commit() throws IOException {
try {
// 从内存中写入文件中
wwb.write();
// 关闭资源,释放内存
wwb.close();
} catch (IOException e) {
e.printStackTrace();
} catch (WriteException e) {
e.printStackTrace();
}
}
}
//创建方法 如下
try {
// 创建Excel文件
ExcelWriter excel = new ExcelWriter();
//月份数和选择的字段
int month = 12;
String select[] = "buynum,retail,dealerstock".split(",");
String selectCn[] = "进货,零售,库存".split(",");
// 打印第一行表头
excel.combine(0, 0, 1, 0, "产品");
for (int i = 0; i < month; i++) {
excel.combine(2+(i*select.length), 0, (2-1)+(i*select.length)+select.length, 0,
(i + 1) + "");
}
// 打印第二行表头
excel.addRow(1, "品牌,车系");
for (int i = 0; i < month; i++)
for (int j = 0; j < select.length; j++) {
excel.addLabel(2+(i*select.length)+j, 1, selectCn[j]);
}
// 遍历结果集
for (int i = 0; i < result.size(); i++) {
// 产品
excel.addLabel(0, 2 + i, result.get(i).get("brand"));
excel.addLabel(1, 2 + i, result.get(i).get("carseries"));
//内容
for (int j = 0; j < month; j++)
for (int k = 0; k < select.length; k++) {
excel.addNumberLabel((2+(j*select.length)+k), 2 + i, result.get(i).get(select[k]+(j+1)));
}
}
excel.commit();
String filename=excel.getFilename();
json1.put("success", "true");
json1.put("filename",filename);
} catch (Exception e) {
// TODO: handle exception
// 出错
json1.put("success", "false");
json1.put("errmsg", "失敗" + e.getMessage());
return json1;
}
return json1;