作者:乔山办公网日期:
返回目录:word文档
在选项里面找到文件保存的选项,如有这个可以保存到指定格式的话,应该是在这里面的。
首先要搞清楚Http中Get/Post请求区别:copy (1)get是从服务器上百获取数据,post是向服务器传送数据。 (1)在度客户端,Get方式在知通过URL提交数据,数据在URL中可以看到;POST方式,数据放置在HTML HEADER内提交。 (2)对道于get方式,服务器端用Reque
(1)在spring mvc的配置文件中配置:
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
<property name="uploadTempDir" value="/tmp" /> <!-- 临时目录 -->
<property name="maxUploadSize" value="10485760"/> <!-- 10M -->
</bean>
(2)文件上传表单和结果展示页fileupload.jsp:
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib prefix="mvc" uri="http:///jsp/jstl/core"%>
<html>
<head>
<title>Spring MVC文件上传</title>
</head>
<body>
<h2>图片文件上传</h2>
<mvc:form modelAttribute="user" action="upload.html"
7a686964616fe78988e69d83332enctype="multipart/form-data">
<table>
<tr>
<td>用户名:</td>
<td><mvc:input path="userName" /></td>
</tr>
<tr>
<td>选择头像:</td>
<td><input type="file" name="file" /></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="Submit" /></td>
</tr>
</table>
</mvc:form>
<c:if test="${u !=null }">
<h2>上传结果</h2>
<table>
<c:if test="${u.userName != null }">
<tr>
<td>用户名:</td>
<td>${u.userName}</td>
</tr>
</c:if>
<c:if test="${u.logoSrc != null }">
<tr>
<td>头像:</td>
<td><img src="${u.logoSrc}" width="100px" height="100px"></td>
</tr>
</c:if>
</table>
</c:if>
</body>
</html>
(3)后台处理UploadController.java:
package cn.zifangsky.controller;
import java.io.File;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.io.FileUtils;
import org.springframework.stereotype.Controller;
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.multipart.MultipartFile;
import org.springframework.web.servlet.ModelAndView;
import cn.zifangsky.model.User;
import cn.zifangsky.utils.StringUtile;
@Controller
public class UploadController {
@RequestMapping(value = "/form")
public ModelAndView form() {
ModelAndView modelAndView = new ModelAndView("fileupload", "user", new User());
return modelAndView;
}
@RequestMapping(value = "/upload", method = RequestMethod.POST)
public ModelAndView upload(User user, @RequestParam("file") MultipartFile tmpFile, HttpServletRequest request) {
ModelAndView modelAndView = new ModelAndView("fileupload");
if (tmpFile != null) {
// 获取物理路径
String targetDirectory = request.getSession().getServletContext().getRealPath("/uploads");
String tmpFileName = tmpFile.getOriginalFilename(); // 上传的文件名
int dot = tmpFileName.lastIndexOf('.');
String ext = ""; //文件后缀名
if ((dot > -1) && (dot < (tmpFileName.length() - 1))) {
ext = tmpFileName.substring(dot + 1);
}
// 其他文件格式不处理
if ("png".equalsIgnoreCase(ext) || "jpg".equalsIgnoreCase(ext) || "gif".equalsIgnoreCase(ext)) {
// 重命名上传的文件名
String targetFileName = StringUtile.renameFileName(tmpFileName);
// 保存的新文件
File target = new File(targetDirectory, targetFileName);
try {
// 保存文件
FileUtils.copyInputStreamToFile(tmpFile.getInputStream(), target);
} catch (IOException e) {
e.printStackTrace();
}
User u = new User();
u.setUserName(user.getUserName());
u.setLogoSrc(request.getContextPath() + "/uploads/" + targetFileName);
modelAndView.addObject("u", u);
}
return modelAndView;
}
return modelAndView;
}
}
在上面的upload方法中,为了接收上传的文件,因此使用了一个MultipartFile类型的变量来接收上传的临时文件,同时为了给文件进行重命名,我调用了一个renameFileName方法,这个方法的具体内容如下:
/**
* 文件重命名
*/
public static String renameFileName(String fileName) {
String formatDate = new SimpleDateFormat("yyMMddHHmmss").format(new Date()); // 当前时间字符串
int random = new Random().nextInt(10000);
String extension = fileName.substring(fileName.lastIndexOf(".")); // 文件后缀
return formatDate + random + extension;
}
注:上面用到的model——User.java:
package cn.zifangsky.model;
public class User {
private String userName; // 用户名
private String logoSrc; // 头像地址
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getLogoSrc() {
return logoSrc;
}
public void setLogoSrc(String logoSrc) {
this.logoSrc = logoSrc;
}
}
至此全部结束
效果如下:
(PS:纯手打,望采纳)
你好!
springmvc文件上e68a84e8a2ad7a686964616f365传
1.加入jar包:
commons-fileupload-1.2.2.jar
commons-io-2.0.1.jar
lperson.java中加属性,实现get ,set方法
private String photoPath;
2.创建WebRoot/upload目录,存放上传的文件
1 <sf:form id="p" action="saveOrUpdate"
2 method="post"
3 modelAttribute="person"
4 enctype="multipart/form-data">
5
6 <sf:hidden path="id"/>
7 name: <sf:input path="name"/>
8 age: <sf:input path="age"/>
9 photo: <input type="file" name="photo"/>
上面第9行文件上传框,不能和实体对象属性同名,类型不同
controller配置
1 12、文件上传功能实现 配置文件上传解析器
2 @RequestMapping(value={"/saveOrUpdate"},method=RequestMethod.POST)
3 public String saveOrUpdate(Person p,
4 @RequestParam("photo") MultipartFile file,
5 HttpServletRequest request
6 ) throws IOException{
7 if(!file.isEmpty()){
8 ServletContext sc = request.getSession().getServletContext();
9 String dir = sc.getRealPath(“/upload”); //设定文件保存的目录
10
11 String filename = file.getOriginalFilename(); //得到上传时的文件名
12 FileUtils.writeByteArrayToFile(new File(dir,filename), file.getBytes());
13
14 p.setPhotoPath(“/upload/”+filename); //设置图片所在路径
15
16 System.out.println("upload over. "+ filename);
17 }
18 ps.saveOrUpdate(p);
19 return "redirect:/person/list.action"; //重定向
20 }
3.文件上传功能实现 spring-mvc.xml 配置文件上传解析器
1 <!-- 文件上传解析器 id 必须为multipartResolver -->
2 <bean id="multipartResolver"
3 class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
4 <property name="maxUploadSize" value=“10485760"/>
5 </bean>
6
7 maxUploadSize以字节为单位:10485760 =10M id名称必须这样写
1 映射资源目录
2 <mvc:resources location="/upload/" mapping="/upload/**"/>
随即文件名常用的三种方式:
文件上传功能(增强:防止文件重名覆盖)
fileName = UUID.randomUUID().toString() + extName;
fileName = System.nanoTime() + extName;
fileName = System.currentTimeMillis() + extName;
1 if(!file.isEmpty()){
2 ServletContext sc = request.getSession().getServletContext();
3 String dir = sc.getRealPath("/upload");
4 String filename = file.getOriginalFilename();
5
6
7 long _lTime = System.nanoTime();
8 String _ext = filename.substring(filename.lastIndexOf("."));
9 filename = _lTime + _ext;
10
11 FileUtils.writeByteArrayToFile(new File(dir,filename), file.getBytes());
12
13 p.setPhotoPath("/upload/"+filename);
14
15 System.out.println("upload over. "+ filename);
16 }
图片显示 personList.jsp
1 <td><img src="${pageContext.request.contextPath}${p.photoPath}">${p.photoPath}</td>