版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/lixin2151408/article/details/71713712
这几天做了个前台点击查询后，将后台查询的xml进行打包，形成zip（可存在服务器任意位置），并在前台页面可以点击下载进行下载：
打包代码：
public String savexml(List<Map> list) throws IOException{
int i;
Calendar c = Calendar.getInstance();
String year = c.get(Calendar.YEAR)+"";
String month = c.get(Calendar.MONTH)+1+"";
String date = c.get(Calendar.DATE)+"";
String hour = c.get(Calendar.HOUR_OF_DAY)+"";
String minute = c.get(Calendar.MINUTE)+"";
String second = c.get(Calendar.SECOND)+"";
String data = year+month+date+hour+minute+second;
//首先生成一个文件夹，存放此次查询获得的xml;
String path = this.getClass().getResource("/").getPath();
System.err.println(path);
File file = new File("F:\\xml\\"+data+"");
file.mkdirs();
String filename = null;
String xmlcontent = null;
//将查询获得的xml依次存放入此文件夹中;
Map map = new HashMap();
for(i=0;i<list.size();i++){
map = list.get(i);
// System.err.println(map);
if(map.get("FILENAME")!=null){filename=map.get("FILENAME").toString();}
if(map.get("XMLCONTENT")!=null){xmlcontent=map.get("XMLCONTENT").toString();}
FileWriter fw = new FileWriter("F:\\xml\\"+data+"\\"+filename+"");
// System.out.println("~~~~~~~"+xmlcontent);
fw.write(xmlcontent);
fw.flush();
fw.close();
}
String sourceFilePath = "F:\\xml\\"+data+"";
String zipFilePath = "F:\\xml\\"+data+"";
String fileName = data;
boolean flag = fileToZip(sourceFilePath, zipFilePath, fileName);
if(flag){
System.out.println("文件打包成功!");
}else{
System.out.println("文件打包失败!");
}
return zipFilePath+"\\"+fileName;
}
/**
* 将存放在sourceFilePath目录下的源文件，打包成fileName名称的zip文件，并存放到zipFilePath路径下
* @param sourceFilePath :待压缩的文件路径
* @param zipFilePath :压缩后存放路径
* @param fileName :压缩后文件的名称
* @return
*/
public static boolean fileToZip(String sourceFilePath,String zipFilePath,String fileName){
boolean flag = false;
File sourceFile = new File(sourceFilePath);
FileInputStream fis = null;
BufferedInputStream bis = null;
FileOutputStream fos = null;
ZipOutputStream zos = null;
if(sourceFile.exists() == false){
System.out.println("待压缩的文件目录："+sourceFilePath+"不存在.");
}else{
try {
File zipFile = new File(zipFilePath + "/" + fileName +".zip");
if(zipFile.exists()){
System.out.println(zipFilePath + "目录下存在名字为:" + fileName +".zip" +"打包文件.");
}else{
File[] sourceFiles = sourceFile.listFiles();
if(null == sourceFiles || sourceFiles.length<1){
System.out.println("待压缩的文件目录：" + sourceFilePath + "里面不存在文件，无需压缩.");
}else{
fos = new FileOutputStream(zipFile);
zos = new ZipOutputStream(new BufferedOutputStream(fos));
byte[] bufs = new byte[1024*10];
for(int i=0;i<sourceFiles.length;i++){
//创建ZIP实体，并添加进压缩包
ZipEntry zipEntry = new ZipEntry(sourceFiles[i].getName());
zos.putNextEntry(zipEntry);
//读取待压缩的文件并写进压缩包里
fis = new FileInputStream(sourceFiles[i]);
bis = new BufferedInputStream(fis, 1024*10);
int read = 0;
while((read=bis.read(bufs, 0, 1024*10)) != -1){
zos.write(bufs,0,read);
}
}
flag = true;
}
}
} catch (FileNotFoundException e) {
e.printStackTrace();
throw new RuntimeException(e);
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e);
} finally{
//关闭流
try {
if(null != bis) bis.close();
if(null != zos) zos.close();
} catch (IOException e) {
e.printStackTrace();
throw new RuntimeException(e);
}
}
}
return flag;
} 下载代码：controller：
@RequestMapping(value = "/upload", method = RequestMethod.GET)
public void exportZip(HttpServletRequest request, HttpServletResponse response) {
String path = request.getQueryString();
path = path.substring(5);
path = path.replaceAll(";", "\\\\");
File file = new File(path);// path是根据日志路径和文件名拼接出来的
String filename = file.getName();// 获取日志文件名称
response.setCharacterEncoding("utf-8");
response.setContentType("multipart/form-data");
response.setHeader("Content-Disposition", "attachment;fileName=" + filename);
try {
//打开本地文件流
InputStream inputStream = new FileInputStream(path);
//激活下载操作
OutputStream os = response.getOutputStream();
//循环写入输出流
byte[] b = new byte[2048];
int length;
while ((length = inputStream.read(b)) > 0) {
os.write(b, 0, length);
}
// 这里主要关闭。
os.close();
inputStream.close();
} catch (Exception e){
e.printStackTrace();
}
}前台页面JS：
function query()
{
var areacode=$('#areacode').textbox('getValue');
var rectype=$('#rectype').textbox('getValue');
var filename=$('#filename').textbox('getValue');
var bdcdyh=$('#bdcdyh').textbox('getValue');
var kjjd=$("#kjjd").is(":checked");
var page = $("#mylist").datagrid("options").pageNumber;
var rows = $("#mylist").datagrid("options").pageSize;
var status = $("#status option:selected").attr("value");
para = { page : page, rows : rows, areacode : areacode, rectype : rectype, filename : filename, bdcdyh : bdcdyh, kjjd : kjjd , status : status};
$("#mylist").datagrid({
url : "../common/loglist/",
method : 'get',
queryParams : para,
rownumbers : true,
fitColumns : true,
pagination : true,
pageSize:100,
height:screen.availHeight-155,
pageList : [ 100, 150, 200, 400, 500 ],
onLoadSuccess:function(data){
data.urls = data.urls+".zip";
var path = data.urls.replace(/\\/g,';');
$("#export").attr("href","../common/upload?path="+path)
}
});
}有几点需要注意：
①我是将文件位置传给了后台，但是文件名是：F:/XXX/XX.zip；但是浏览器会将/字符当成转义字符，在这里卡住了好久才明白哪里错了。于是我在前台将 / 替换成了；然后再传给后台；
②后台一定要写response属性啊：
response.setCharacterEncoding("utf-8");
response.setContentType("multipart/form-data");
response.setHeader("Content-Disposition", "attachment;fileName=" + filename);
这三句话如果不加上，浏览器会出现自行编译，可能会出现前台response错误；
③下载的时候，直接a标签链接服务器接口地址！