- 配置
- web.
- SpringMVC配置文件 applicationContext.
- 文件上传 Controller
- 上传实现一
- 上传实现二
- 测试
- 依赖
配置
上传文件的核心配置类：CommonsMultipartResolver，注意id="multipartResolver"不要写错<?
文件上传 Controller
上传实现一
package com.pro.controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.multipart.commons.CommonsMultipartFile;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.*;import java.net.URLEncoder;import java.util.HashMap;import java.util.Map;@RestControllerpublic class FileController { /* * 采用file.transferTo 来保存上传的文件 */ @RequestMapping("/upload2") public Map fileUpload2(@RequestParam("file") CommonsMultipartFile file, HttpServletRequest request) throws IOException { //上传路径保存设置 String path = request.getServletContext().getRealPath("/upload"); File realPath = new File(path); if (!realPath.exists()){ realPath.mkdir(); } //上传文件地址 System.out.println("上传文件保存地址 --> "+realPath); //通过CommonsMultipartFile的方法直接写文件（注意这个时候） file.transferTo(new File(realPath +"/"+ file.getOriginalFilename())); Map<Object, Object> hashMap = new HashMap<>(); hashMap.put("code", 0); hashMap.put("msg", "上传成功"); return hashMap; }}
上传实现二
<?package com.pro.controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.multipart.commons.CommonsMultipartFile;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.*;import java.net.URLEncoder;import java.util.HashMap;import java.util.Map;@RestControllerpublic class FileController { /* * 采用file.transferTo 来保存上传的文件 */ @RequestMapping("/upload2") public Map fileUpload2(@RequestParam("file") CommonsMultipartFile file, HttpServletRequest request) throws IOException { //上传路径保存设置 String path = request.getServletContext().getRealPath("/upload"); File realPath = new File(path); if (!realPath.exists()){ realPath.mkdir(); } //上传文件地址 System.out.println("上传文件保存地址 --> "+realPath); //通过CommonsMultipartFile的方法直接写文件（注意这个时候） file.transferTo(new File(realPath +"/"+ file.getOriginalFilename())); Map<Object, Object> hashMap = new HashMap<>(); hashMap.put("code", 0); hashMap.put("msg", "上传成功"); return hashMap; }}这里的文件名称没有使用 UUID组合名称 为了方便测试
package com.pro.controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestParam;import org.springframework.web.bind.annotation.RestController;import org.springframework.web.multipart.commons.CommonsMultipartFile;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.io.*;import java.net.URLEncoder;import java.util.HashMap;import java.util.Map;@RestControllerpublic class FileController { // @RequestParam("file") 将 name=file 控件得到的文件封装成 CommonsMultipartFile 对象 // 批量上传把 CommonsMultipartFile 改为数组即可 @RequestMapping("/upload") public String upload(@RequestParam("file") CommonsMultipartFile file, HttpServletRequest request) throws IOException { // 获取文件名称 String uploadFileName = file.getOriginalFilename(); // 如果文件名为空, 直接返回首页 if ("".equals(uploadFileName)) { return "file upload error"; } System.out.println("上传文件名 --> " + uploadFileName); // 设置文件的保存位置 String path = request.getServletContext().getRealPath("/upload"); // 判断路径是否存在 File realPath = new File(path); if (!realPath.exists()) { // 如果不存在就创建 realPath.mkdir(); } System.out.println("文件保存路径 --> " + realPath); // 获取文件输入流 InputStream is = file.getInputStream(); // 获取文件输出流 FileOutputStream os = new FileOutputStream(new File(realPath, uploadFileName)); // 缓冲区读写文件 byte[] buffer = new byte[1024]; int len; while ((len = is.read(buffer)) != -1) { os.write(buffer, 0, len); os.flush(); } // 关闭流 os.close(); is.close(); return "file upload success"; }}测试
<%@ page contentType="text/html;charset=UTF-8" language="java" %><html> <head> <title>$Title$</title> </head> <body> <form enctype="multipart/form-data" action="${pageContext.request.contextPath}/upload2" method="post"> <input type="file" name="file"> <input type="submit" value="上传实现一"> </form> <form enctype="multipart/form-data" action="${pageContext.request.contextPath}/upload" method="post"> <input type="file" name="file"> <input type="submit" value="上传实现二"> </form> </body></html>依赖
核心依赖就是 commons-fileupload
<!--导入依赖--><dependencies> <!--单元测试--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.13</version> </dependency> <!--spring--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.2.0.RELEASE</version> </dependency> <!--文件上传--> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.3</version> </dependency> <!--servlet-api导入高版本的--> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>4.0.1</version> </dependency> <!--jsp--> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> </dependency> <!--jstl表达式--> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency></dependencies>原文转载：http://www.shaoqun.com/a/521227.html
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目录配置web.SpringMVC配置文件applicationContext.文件上传Controller上传实现一上传实现二测试依赖配置<?上传文件的核心配置类：CommonsMultipartResolver，注意id="multipartResolver"不要写错<?文件上传Controller上传实现一packagecom.pro.controller;i
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