采用springmvc框架實現上傳
jar包支持
springMVC配置文件
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd"> <context:component-scan base-package="com.atguigu"></context:component-scan> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/view/"></property> <property name="suffix" value=".jsp"></property> </bean> <!-- 靜態資源需要默認的servlet來處理 --> <mvc:default-servlet-handler/> <mvc:annotation-driven></mvc:annotation-driven> <!-- id為固定的，只能為multipartResolver 作用：將客戶端上傳的file對象轉換成MultipartFile對象， 設置文件解析的編碼一定要與頁面編碼保持一致pageEncoding xml的屬性是純文本，不能寫運算符，屬性 --> <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="defaultEncoding" value="UTF-8"></property> <property name="maxUploadSize" value="888888888"></property> </bean> </beans>
1. file.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>測試上傳與下載</title> </head> <body> <a href="down">down</a> <form action="up" method="post" enctype="multipart/form-data"> 頭像 ：<input type="file" name="uploadFile"> 描述 ：<input type="text" name="desc"> <input type="submit" value="上傳"> </form> </body> </html>
2.UploadController
package com.atguigu.test; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; import java.util.UUID; import javax.servlet.http.HttpSession; import org.springframework.http.HttpHeaders; import org.springframework.http.HttpStatus; import org.springframework.http.ResponseEntity; import org.springframework.stereotype.Controller; import org.springframework.util.MultiValueMap; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.multipart.MultipartFile; @Controller public class UploadAndDown { @RequestMapping("/down") public ResponseEntity<byte[]> down(HttpSession session) throws Exception{ //獲取下載文件的路徑 (獲取tomcat服務器的位置) String realPath = session.getServletContext().getRealPath("img"); String finalPath = realPath+ File.separator +"1.jpg"; //創建字節輸入流 InputStream in = new FileInputStream(finalPath); //available():獲取輸入流所讀取的文件的最大字節數 byte[] body = new byte[in.available()]; //把字節讀取到數組中 in.read(body); //設置請求頭 MultiValueMap<String, String> headers = new HttpHeaders(); headers.add("Content-Disposition", "attachment;filename=aaa.jpg"); //設置響應狀態 HttpStatus statusCode = HttpStatus.OK; in.close(); ResponseEntity<byte[]> entity = new ResponseEntity<byte[]>(body, headers, statusCode); return entity; } @RequestMapping(value="/up_old", method = RequestMethod.POST) public String up_old (String desc,MultipartFile uploadFile,HttpSession session) throws Exception { //獲取上傳文件的名稱 String fileName = uploadFile.getOriginalFilename(); //獲取上傳文件的路徑 String path = session.getServletContext().getRealPath("photo")+File.separator+fileName; //獲取輸入流 InputStream is = uploadFile.getInputStream(); //獲取輸出流 OutputStream os = new FileOutputStream(new File(path)); //開始復制 int i = 0; byte[] bytes = new byte[1024]; while((i = is.read(bytes))!=-1) { os.write(bytes, 0, i); } os.close(); is.close(); return "success"; }
/**
寫法二
* 使用springmvc實現上傳，采用MultipartFile的transfer() * @param desc * @param uploadFile * @param session * @return * @throws Exception */ @RequestMapping(value="/up", method = RequestMethod.POST) public String up (String desc,MultipartFile uploadFile,HttpSession session) throws Exception { //獲取上傳文件的名稱 String fileName = uploadFile.getOriginalFilename(); //解決文件重名問題 String finalFileName = UUID.randomUUID().toString()+fileName.substring(fileName.lastIndexOf(".")); //獲取上傳文件的路徑 String path = session.getServletContext().getRealPath("photo")+File.separator+finalFileName; uploadFile.transferTo(new File(path)); return "success"; } }