Springmvc 生成并且下载文件--直接在浏览器下载。

来源：互联网发布：重庆指尖网络编辑：程序博客网时间：2024/05/29 14:25

首先，我有一个jsp页面：

<%@ page contentType="text/html;charset=UTF-8" language="java" %><html><head>    <title>Title</title></head><script type="application/javascript">    function download(){        var url="http://localhost:8080/wdxend/excelexport/testDownload";        window.open(url);    }</script><body><input type="button" value="导出数据" onclick="download()"/></body></html>

很久不玩，都不记得jsp怎么配得了。

<bean id="jspViewResolver"  class="org.springframework.web.servlet.view.InternalResourceViewResolver"><property name="prefix" value="/WEB-INF/views/static/"/><property name="suffix" value=".jsp"/></bean>

这是一个访问用的Controller：用来跳转到下载页面。

@RequestMapping("testjsp")    public ModelAndView test(){        ModelAndView modelAndView = new ModelAndView();        modelAndView.setViewName("status");        return modelAndView;    }

这是一个下载的Controller

@RequestMapping("testDownload")    public String testDownload(HttpServletRequest request, HttpServletResponse response/*, @RequestBody PieceCostParam pieceCostParam*/) throws Exception{        PieceCostParam pieceCostParam = new PieceCostParam();        PieceCostQuery pieceCostQuery = new PieceCostQuery();        pieceCostQuery.setCompanyName("杭州电子放假大学");        pieceCostParam.setPieceCostQuery(pieceCostQuery);        return excelExportService.testDownload(request, response, pieceCostParam);    }

这是service：

@Override    public String testDownload(HttpServletRequest request, HttpServletResponse response, PieceCostParam pieceCostParam) throws Exception{        String fileName="excel文件";        //填充projects数据        List<PieceCostVO> projects=costRelatedService.getAllPieceCost(pieceCostParam);        List<Map<String,Object>> list=createExcelRecord(projects);        String columnNames[]={"序号","机构名称","购买时间","数据包名称","购买线索条数","线索单价","线索收费"};//列名        String keys[]    =     {"id","name","purcahseTime","packName","num","cost","sumcost"};//map中的key        ByteArrayOutputStream os = new ByteArrayOutputStream();        try {            ExcelUtil.createWorkBook(list,keys,columnNames).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(), "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();        }        return null;    }    private List<Map<String, Object>> createExcelRecord(List<PieceCostVO> projects) {        List<Map<String, Object>> listmap = new ArrayList<Map<String, Object>>();        Map<String, Object> map = new HashMap<String, Object>();        map.put("sheetName", "sheet1");        listmap.add(map);        PieceCostVO project=null;        for (int j = 0; j < projects.size(); j++) {            project=projects.get(j);            Map<String, Object> mapValue = new HashMap<String, Object>();            mapValue.put("id", j);            mapValue.put("name", project.getCompanyName());            mapValue.put("purcahseTime", project.getPurchaseTime());            mapValue.put("packName", project.getDataPackName());            mapValue.put("num", project.getDataSum());            mapValue.put("cost", project.getDataCost());            mapValue.put("sumcost", project.getCostSum());            listmap.add(mapValue);        }        return listmap;    }

这是ExcelUtil类：

/** * 导出Excel文档工具类 * [@author](http://my.oschina.net/arthor) 那位先生 * [@date](http://my.oschina.net/u/2504391) 2014-8-6 * */public class ExcelUtil {    /**     * 创建excel文档，     * [@param](http://my.oschina.net/u/2303379) list 数据     * @param keys list中map的key数组集合     * @param columnNames excel的列名     * */    public static Workbook createWorkBook(List<Map<String, Object>> list, String []keys, String columnNames[]) {        // 创建excel工作簿        Workbook wb = new HSSFWorkbook();        // 创建第一个sheet（页），并命名        Sheet sheet = wb.createSheet(list.get(0).get("sheetName").toString());        // 手动设置列宽。第一个参数表示要为第几列设；，第二个参数表示列的宽度，n为列高的像素数。        for(int i=0;i<keys.length;i++){            sheet.setColumnWidth((short) i, (short) (35.7 * 150));        }        // 创建第一行        Row row = sheet.createRow((short) 0);        // 创建两种单元格格式        CellStyle cs = wb.createCellStyle();        CellStyle cs2 = wb.createCellStyle();        // 创建两种字体        Font f = wb.createFont();        Font f2 = wb.createFont();        // 创建第一种字体样式（用于列名）        f.setFontHeightInPoints((short) 10);        f.setColor(IndexedColors.BLACK.getIndex());        f.setBoldweight(Font.BOLDWEIGHT_BOLD);        // 创建第二种字体样式（用于值）        f2.setFontHeightInPoints((short) 10);        f2.setColor(IndexedColors.BLACK.getIndex());//        Font f3=wb.createFont();//        f3.setFontHeightInPoints((short) 10);//        f3.setColor(IndexedColors.RED.getIndex());        // 设置第一种单元格的样式（用于列名）        cs.setFont(f);        cs.setBorderLeft(CellStyle.BORDER_THIN);        cs.setBorderRight(CellStyle.BORDER_THIN);        cs.setBorderTop(CellStyle.BORDER_THIN);        cs.setBorderBottom(CellStyle.BORDER_THIN);        cs.setAlignment(CellStyle.ALIGN_CENTER);        // 设置第二种单元格的样式（用于值）        cs2.setFont(f2);        cs2.setBorderLeft(CellStyle.BORDER_THIN);        cs2.setBorderRight(CellStyle.BORDER_THIN);        cs2.setBorderTop(CellStyle.BORDER_THIN);        cs2.setBorderBottom(CellStyle.BORDER_THIN);        cs2.setAlignment(CellStyle.ALIGN_CENTER);        //设置列名        for(int i=0;i<columnNames.length;i++){            Cell cell = row.createCell(i);            cell.setCellValue(columnNames[i]);            cell.setCellStyle(cs);        }        //设置每行每列的值        for (short i = 1; i < list.size(); i++) {            // Row 行,Cell 方格 , Row 和 Cell 都是从0开始计数的            // 创建一行，在页sheet上            Row row1 = sheet.createRow((short) i);            // 在row行上创建一个方格            for(short j=0;j<keys.length;j++){                Cell cell = row1.createCell(j);                cell.setCellValue(list.get(i).get(keys[j]) == null?" ": list.get(i).get(keys[j]).toString());                cell.setCellStyle(cs2);            }        }        return wb;    }}

差不多就是这样啦，你要是直接把代码拷过去肯定会报错啦，因为你没有我的实体类，在你找到我的代码之前肯定知道excel的操作啦，那这些你应该也能看懂，要是不知道，建议还是先看看excel的操作吧。

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