单文件上传
1, 需要使用thymeleaf模板: http://www.cnblogs.com/wenbronk/p/6565834.html
src/main/resource/template/file.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<title>Hello World!</title>
</head>
<body>
<form method="POST" enctype="multipart/form-data" action="/upload">
<p>文件：<input type="file" name="file" /></p>
<p><input type="submit" value="上传" /></p>
</form>
</body>
</html>
文件上传方法
package com.iwhere.main.controller;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.List;
import java.util.UUID;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;
import org.springframework.web.multipart.MultipartHttpServletRequest;
/**
* 文件上传controller
*
* @RestController 相当于同时 @Controller和@ResponseBody两个注解
*
* @author wenbronk
* @time 2017年4月6日 下午2:43:03 2017
*/
@RestController
public class FileUploadController {
/**
* 文件上传
*
* @return
*/
@RequestMapping(value = "/upload", method = RequestMethod.POST)
public String handlFileUpload(@RequestParam("file") MultipartFile file) {
if (file.isEmpty()) {
return "文件是空的";
}
// 读取文件内容并写入 指定目录中
String fileName = file.getOriginalFilename();
// String suffixName = fileName.substring(fileName.lastIndexOf("."));
fileName = UUID.randomUUID() + "|+=|-|" + fileName;
File dest = new File("E:/test/" + fileName);
// 判断目录是否存在
if (!dest.getParentFile().exists()) {
dest.getParentFile().mkdirs();
}
try {
file.transferTo(dest);
} catch (IOException e) {
return "后台也不知道为什么, 反正就是上传失败了";
}
return "上传成功";
}
}
多文件上传:
1, thymeleaf
src/main/resource/template/multifile.html
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<title>Hello World!</title>
</head>
<body>
<form method="POST" enctype="multipart/form-data" action="/batch/upload">
<p>文件1：<input type="file" name="file" /></p>
<p>文件2：<input type="file" name="file" /></p>
<p>文件3：<input type="file" name="file" /></p>
<p><input type="submit" value="上传" /></p>
</form>
</body>
</html>
2, 多文件上传方法
/**
* 多文件上传
* 类似单文件上传, 遍历
* @return
*/
@RequestMapping(value = "multiUpload", method = RequestMethod.POST)
public String handleMultiFileupload(HttpServletRequest request) {
List<MultipartFile> files = ((MultipartHttpServletRequest) request).getFiles("file");
for (MultipartFile multipartFile : files) {
if (multipartFile.isEmpty()) {
return "文件是空的";
}
// 读取文件内容并写入 指定目录中
String fileName = multipartFile.getOriginalFilename();
// String suffixName =
// fileName.substring(fileName.lastIndexOf("."));
fileName = UUID.randomUUID() + "|+=|-|" + fileName;
File dest = new File("E:/test/" + fileName);
// 判断目录是否存在
if (!dest.getParentFile().exists()) {
dest.getParentFile().mkdirs();
}
try {
multipartFile.transferTo(dest);
} catch (IOException e) {
return "后台也不知道为什么, 反正就是上传失败了";
}
}
return "上传成功";
}
文件下载
/**
* 文件下载
*
* @return
*/
@RequestMapping("/download")
public String downLoadFile(HttpServletRequest request, HttpServletResponse response) {
// 文件名可以从request中获取, 这儿为方便, 写死了
String fileName = "rtsch_ex.json";
// String path = request.getServletContext().getRealPath("/");
String path = "E:/test";
File file = new File(path, fileName);
if (file.exists()) {
// 设置强制下载打开
response.setContentType("application/force-download");
// 文件名乱码, 使用new String() 进行反编码
response.addHeader("Content-Disposition", "attachment;fileName=" + fileName);
// 读取文件
BufferedInputStream bi = null;
try {
byte[] buffer = new byte[1024];
bi = new BufferedInputStream(new FileInputStream(new File("")));
ServletOutputStream outputStream = response.getOutputStream();
int i = -1;
while (-1 != (i = bi.read(buffer))) {
outputStream.write(buffer, 0, i);
}
return "下载成功";
} catch (Exception e) {
return "程序猿真不知道为什么, 反正就是下载失败了";
} finally {
if (bi != null) {
try {
bi.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
return "文件不存在";
}
文件下载时, 最容易出现文件名乱码的问题, 这儿使用new String() 进行反编码,
String downname = new String(filename.getBytes("gbk"),"iso8859-1");
当然还有个不太稳的方法:
URLEncoder.encode(fileName, "UTF-8"));
还有一种, 不太奏效
时间： 2024-10-10 08:25:00