/*

* 另存为

*/

@RequestMapping("/saveAs.do")

public @ResponseBody

void saveAs(String filePath, String fileName) {

try {

File file = new File(filePath);

// 设置文件MIME类型

getResponse().setContentType(getMIMEType(file));

// 设置Content-Disposition

getResponse().setHeader(

"Content-Disposition",

"attachment;filename="

+ URLEncoder.encode(fileName, "UTF-8"));

// 获取目标文件的绝对路径

String fullFileName = getRealPath("/upload/" + filePath);

// System.out.println(fullFileName);

// 读取文件

InputStream ins = new FileInputStream(fullFileName);

// 放到缓冲流里面

BufferedInputStream bins = new BufferedInputStream(ins);

// 获取文件输出IO流

// 读取目标文件，通过response将目标文件写到客户端

OutputStream outs = getResponse().getOutputStream();

BufferedOutputStream bouts = new BufferedOutputStream(outs);

// 写文件

int bytesRead = 0;

byte[] buffer = new byte[8192];

// 开始向网络传输文件流

while ((bytesRead = bins.read(buffer, 0, 8192)) != -1) {

bouts.write(buffer, 0, bytesRead);

}

bouts.flush();// 这里一定要调用flush()方法

ins.close();

bins.close();

outs.close();

bouts.close();

} catch (Exception e) {

e.printStackTrace();

}

}

/*

* 批量下载另存为

*/

@RequestMapping("/batDownload.do")

public @ResponseBody

void batDownload(String filePaths, String fileNames) {

String tmpFileName = "work.zip";

byte[] buffer = new byte[1024];

String strZipPath = getRealPath("/upload/work/"+tmpFileName);

try {

ZipOutputStream out = new ZipOutputStream(new FileOutputStream(

strZipPath));

String[] files=filePaths.split("\\|",-1);

String[] names=fileNames.split("\\|",-1);

// 下载的文件集合

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

FileInputStream fis = new FileInputStream(getRealPath("/upload/"+files[i]));

out.putNextEntry(new ZipEntry(names[i]));

//设置压缩文件内的字符编码，不然会变成乱码

out.setEncoding("GBK");

int len;

// 读入需要下载的文件的内容，打包到zip文件

while ((len = fis.read(buffer)) > 0) {

out.write(buffer, 0, len);

}

out.closeEntry();

fis.close();

}

out.close();

saveAs("work/"+tmpFileName, tmpFileName);

} catch (Exception e) {

e.printStackTrace();

}

}

/**

* 根据文件后缀名获得对应的MIME类型。

*

* @param file

*/

private String getMIMEType(File file) {

String type = "*/*";

String fName = file.getName();

// 获取后缀名前的分隔符"."在fName中的位置。

int dotIndex = fName.lastIndexOf(".");

if (dotIndex < 0) {

return type;

}

/* 获取文件的后缀名 */

String end = fName.substring(dotIndex, fName.length()).toLowerCase();

if (end == "")

return type;

// 在MIME和文件类型的匹配表中找到对应的MIME类型。

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

if (end.equals(MIME_MapTable[i][0]))

type = MIME_MapTable[i][1];

}

return type;

}

private final String[][] MIME_MapTable = {

// {后缀名， MIME类型}

{ ".doc", "application/msword" },

{ ".docx",

"application/vnd.openxmlformats-officedocument.wordprocessingml.document" },

{ ".xls", "application/vnd.ms-excel" },

{ ".xlsx",

"application/vnd.openxmlformats-officedocument.spreadsheetml.sheet" },

{ ".pdf", "application/pdf" },

{ ".ppt", "application/vnd.ms-powerpoint" },

{ ".pptx",

"application/vnd.openxmlformats-officedocument.presentationml.presentation" },

{ ".txt", "text/plain" }, { ".wps", "application/vnd.ms-works" },

{ "", "*/*" } };

};

/file/batDownload.do"method="post">

function download(){

var objs=$("#fileFrame").contents().find("input[name='ckFile']:checked");

if(objs.length>0){

var filePaths="";

var fileNames="";

for(var i=0;i

filePaths+=$("#fileFrame").contents().find("#path_"+objs[i].value).val()+"|";

fileNames+=$("#fileFrame").contents().find("#a_"+objs[i].value).html()+"|";

}

filePaths=filePaths.substring(0,filePaths.length-1);

fileNames=fileNames.substring(0,fileNames.length-1);

$("#filePaths").val(filePaths);

$("#fileNames").val(fileNames);

$("#batForm").submit();

}else{

alert("请选择需要下载的文件！");

return false;

}

}

DEMO下载地址：https://dwz.cn/Jw3z6fVq