java通过查询结果导出Excel

1.前端发送请求：

$("#exp").click(function() {
	var state = $(" ").val();//根据自己命名的标签获取值
	var address = $(" ").val();
	var netname = $(" ").text(); 
	window.location.href = encodeURI("${APP_PATH }/re?state="+state+"&ad="+address+"&n="+netname);
});

2.controller接收请求

@RequestMapping("/re")
	public String getmsg(HttpServletRequest request,HttpServletResponse response) throws UnsupportedEncodingException{
		request.setCharacterEncoding("utf-8");
		String re = request.getParameter("state");
		String ad = request.getParameter("ad");
		String n = request.getParameter("n");
		String state = new String(re.getBytes("ISO-8859-1"),"UTF-8");	
		String address = new String(ad.getBytes("ISO-8859-1"),"UTF-8");
		String netname = new String(n.getBytes("ISO-8859-1"),"UTF-8");
	
		Record record  = new Record(address, null, null, netname, state, null);
		List list = irs.recordsByCheck(record);		
		List title = new ArrayList();
		title.add(" ");//这里添加的是你的table里面所有里的值
		title.add(" ");
		title.add(" ");
		title.add(" ");
		title.add(" ");
		title.add(" ");
		title.add(" ");
		ExcelUtil.createExcel(request, response, list, "命名Excel", title);
		return null;
		
	}

3.这里用到一个封装类ExcelUtil

package com.aobo.util;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.List;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import com.aobo.entity.Record;

public class ExcelUtil {

	public static void createExcel(HttpServletRequest request, HttpServletResponse response,
			List list, String fileName, List title){
		try {
			// 创建Excel的工作书册 Workbook,对应到一个excel文档
			HSSFWorkbook workbook = new HSSFWorkbook();
			HSSFCellStyle style = workbook.createCellStyle();
			// 生成一个字体
			HSSFFont font = workbook.createFont();
			// 字体增粗
			//font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
			font.setFontHeightInPoints((short) 11);
			style.setFont(font);
			// 创建Excel的工作sheet,对应到一个excel文档的tab
			HSSFSheet sheet = workbook.createSheet("sheet1");
			// 创建Excel的sheet的一行 (表头)
			HSSFRow row = sheet.createRow(0);
			// 表头内容填充
			for (int i = 0; i < title.size(); i++) {
				// 设置excel每列宽度
				sheet.setColumnWidth(i, 5000);
				HSSFCell cell = row.createCell(i);
				cell.setCellValue(title.get(i));
				cell.setCellStyle(style);
			}
			// 创建内容行
			HSSFCellStyle cellStyle = workbook.createCellStyle();
			cellStyle.setWrapText(true);// 自动换行
			cellStyle.setDataFormat(HSSFDataFormat.getBuiltinFormat("0.00"));
			for (int j = 0; j < list.size(); j++) {
				HSSFRow contentRow = sheet.createRow(j + 1);
				for (int k = 0; k < title.size(); k++) {
					HSSFCell cell = contentRow.createCell(k);
					switch (k) {
					case 0:
						if (list.get(j).getAddress() != null) {// 每一列的名称
							cell.setCellValue(list.get(j).getAddress());
						}
						break;
					case 1:
					if (list.get(j).getShake() != null) {//每一列的名称
							cell.setCellValue(list.get(j).getShake() );
						}
						break;
					case 2:
					if (list.get(j).getNetname() != null) {//每一列的名称
							cell.setCellValue(list.get(j).getNetname());						
						}
						break;
					case 3:
					if (list.get(j).getNet() != null) {//
							cell.setCellValue(list.get(j).getNet());						
						}
						break;
					case 4:
						if (list.get(j).getState() != null) {//
							cell.setCellValue(list.get(j).getState());						
						}
						break;
					case 5:
						if (list.get(j).getUsetime() >0 ) {//
							cell.setCellValue(list.get(j).getUsetime());						
						}
						break;
					case 6:
						if (list.get(j).getTime() != null) {/
							cell.setCellValue(list.get(j).getTime());						
						}
						break;
					default:
						break;
					}
					cell.setCellStyle(cellStyle);
				}
			}

			ByteArrayOutputStream os = new ByteArrayOutputStream();
			try {
				workbook.write(os);
			} catch (IOException e) {
				e.printStackTrace();
			}
			byte[] content = os.toByteArray();
			InputStream is = new ByteArrayInputStream(content);
			// 设置response参数，可以打开下载页面
			response.reset();
			response.setContentType("application/vnd.ms-excel;charset=utf-8");
			response.setHeader("Content-Disposition", "attachment;filename=" + new String((fileName + ".xls").getBytes("gb2312"), "iso-8859-1"));
			ServletOutputStream out = response.getOutputStream();
			BufferedInputStream bis = null;
			BufferedOutputStream bos = null;
			try {
				bis = new BufferedInputStream(is);
				bos = new BufferedOutputStream(out);
				byte[] buff = new byte[2048];
				int bytesRead;
				// Simple read/write loop.
				while (-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
					bos.write(buff, 0, bytesRead);
				}
			} catch (final IOException e) {
				throw e;
			} finally {
				if (bis != null)
					bis.close();
				if (bos != null)
					bos.close();
			}
		} catch (Exception e) {
				e.printStackTrace();
		}
	}
}

最后的效果，点击导出，浏览器左下角出现：