后台生成excel前端下载

后台生成Excel时前端获取下载

Controller控制器：

package com.example.test.controller;

import com.example.test.common.HttpRequest;

import com.example.test.utils.ExcelUtil;

import net.sf.json.JSONArray;

import net.sf.json.JSONObject;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import java.io.OutputStream;

import java.io.UnsupportedEncodingException;

import java.util.List;

@Controller

@RequestMapping(value = "/report")

public class TestController {

    public HttpRequest hr = new HttpRequest();

    /**

     * 导出Excel

     */

    @RequestMapping(value = "/excel", produces = "application/json; charset=utf-8")

    @ResponseBody

    public void findExcel(HttpServletRequest request,HttpServletResponse response) {

        String startTime = request.getParameter("startTime");

        startTime = startTime+" 00:00:00";

        String endTime = request.getParameter("endTime");

        endTime = endTime+" 00:00:00";

        String param = "startTime="+startTime+"&endTime="+endTime;

        String baseURL = "http://localhost:8080";

        String res = hr.sendPost(baseURL+"/getFinancingStat", param);

        System.out.println(res);

        List<JSONObject> list = JSONArray.fromObject(res);

        //excel标题

        String[] title = {"业务员姓名","单量","业务员电话","业务员id"};

        //excel文件名

        String fileName = "业务员数据"+startTime+"至"+endTime+".xls";

        //sheet名

        String sheetName = "业务员数据";

        String[][] content=new String[list.size()][title.length];

        for (int i = 0; i < list.size(); i++) {

            content[i] = new String[title.length];

            JSONObject obj=list.get(i);

            content[i][0] = obj.get("业务员姓名").toString();

            content[i][1] = obj.get("单量").toString();

            content[i][2] = obj.get("业务员电话").toString();

            content[i][3] = obj.get("业务员id").toString();

        }

        //创建HSSFWorkbook

        HSSFWorkbook wb = ExcelUtil.getHSSFWorkbook(sheetName, title, content, null);

        //响应到客户端

        try {

           this.setResponseHeader(response, fileName);

           OutputStream os = response.getOutputStream();

           wb.write(os);

           os.flush();

           os.close();

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

    //发送响应流方法

    public void setResponseHeader(HttpServletResponse response, String fileName) {

        try {

            try {

                fileName = new String(fileName.getBytes(),"ISO8859-1");

            } catch (UnsupportedEncodingException e) {

                // TODO Auto-generated catch block

                e.printStackTrace();

            }

            response.setContentType("application/octet-stream;charset=ISO8859-1");

            response.setHeader("Content-Disposition", "attachment;filename="+ fileName);

            response.addHeader("Pargam", "no-cache");

            response.addHeader("Cache-Control", "no-cache");

        } catch (Exception ex) {

            ex.printStackTrace();

        }

    }

}

ExcelUtil生成Excel的样式：

package com.example.test.utils;

import org.apache.poi.hssf.usermodel.HSSFCell;

import org.apache.poi.hssf.usermodel.HSSFCellStyle;

import org.apache.poi.hssf.usermodel.HSSFRow;

import org.apache.poi.hssf.usermodel.HSSFSheet;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class ExcelUtil {

    /**

     * 导出Excel

     * @param sheetName sheet名称

     * @param title 标题

     * @param values 内容

     * @param wb HSSFWorkbook对象

     * @return

     */

    public static HSSFWorkbook getHSSFWorkbook(String sheetName, String []title, String [][]values, HSSFWorkbook wb){

        // 第一步，创建一个HSSFWorkbook，对应一个Excel文件

        if(wb == null){

            wb = new HSSFWorkbook();

        }

        // 第二步，在workbook中添加一个sheet,对应Excel文件中的sheet

        HSSFSheet sheet = wb.createSheet(sheetName);

        // 第三步，在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制

        HSSFRow row = sheet.createRow(0);

        // 第四步，创建单元格，并设置值表头 设置表头居中

        HSSFCellStyle style = wb.createCellStyle();

        style.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 创建一个居中格式

        //声明列对象

        HSSFCell cell = null;

        //创建标题

        for(int i=0;i<title.length;i++){

            cell = row.createCell(i);

            cell.setCellValue(title[i]);

            cell.setCellStyle(style);

        }

        //创建内容

        for(int i=0;i<values.length;i++){

            row = sheet.createRow(i + 1);

            for(int j=0;j<values[i].length;j++){

                //将内容按顺序赋给对应的列对象

                row.createCell(j).setCellValue(values[i][j]);

            }

        }

        return wb;

    }

}

前端页面：

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

    <script type="text/javascript" src="../js/jquery.js"></script>

</head>

<body>

    开始时间：<input class="form-control" type="date" id="startTime" /><br/><br/>

    结束时间：<input class="form-control" type="date" id="endTime" /><br/><br/>

    <button id="js-export" type="button" class="btn btn-primary">导出Excel</button>

</body>

<script>

    $('#js-export').click(function(){

        var startTime = document.getElementById("startTime").value;

        var endTime = document.getElementById("endTime").value;

        window.location.href="/report/excel?startTime="+startTime+"&endTime="+endTime+"";

    });

</script>

</html>

maven中的配置：

　　　　<dependency>

            <groupId>org.apache.poi</groupId>

            <artifactId>poi</artifactId>

            <version>3.6</version>

        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-examples -->

        <dependency>

            <groupId>org.apache.poi</groupId>

            <artifactId>poi-examples</artifactId>

            <version>3.6</version>

        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-excelant -->

        <dependency>

            <groupId>org.apache.poi</groupId>

            <artifactId>poi-excelant</artifactId>

            <version>3.11</version>

        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml -->

        <dependency>

            <groupId>org.apache.poi</groupId>

            <artifactId>poi-ooxml</artifactId>

            <version>3.6</version>

        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml-schemas -->

        <dependency>

            <groupId>org.apache.poi</groupId>

            <artifactId>poi-ooxml-schemas</artifactId>

            <version>3.6</version>

        </dependency>

        <!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->

        <dependency>

            <groupId>mysql</groupId>

            <artifactId>mysql-connector-java</artifactId>

            <version>5.1.21</version>

        </dependency>

        <dependency>

            <groupId>net.sf.json-lib</groupId>

            <artifactId>json-lib</artifactId>

            <version>2.4</version>

            <classifier>jdk15</classifier>

        </dependency>