1.form的enctype=”multipart/form-data” 这个是上传文件必搜磨须的
2.applicationContext.xml中 <bean id=”multipartResolver” class=”org.springframework.web.multipart.commons.CommonsMultipartResolver”/>关于文件上传的配置不能少
大家可以看具体代码如下:
web.xml
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<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>webtest</display-name>
<凳则listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/config/applicationContext.xml
/WEB-INF/config/codeifAction.xml
</param-value>
</context-param>
<servlet>
<servlet-name>dispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/config/codeifAction.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- 拦截所有以do结尾的请求 -->
<servlet-mapping>
<servlet-name>dispatcherServlet</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>枣漏棚
<welcome-file-list>
<welcome-file>index.do</welcome-file>
</welcome-file-list>
</web-app>
applicationContext.xml
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<?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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"
default-lazy-init="true">
<!-- 启动Spring MVC的注解功能,完成请求和注解POJO的映射 -->
<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" lazy-init="false" />
<!-- 另外最好还要加入DefaultAnnotationHandlerMapping,不然会被 XML或其它的映射覆盖! -->
<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
<!-- 对模型视图名称的解析,即在模型视图名称添加前后缀 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
<!-- 支持上传文件 -->
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>
</beans>
codeifAction.xml
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<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd"
default-lazy-init="true">
<bean id="uploadAction" class="com.codeif.action.UploadAction" />
</beans>
UploadAction.java
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package com.codeif.action
import java.io.File
import java.util.Date
import javax.servlet.http.HttpServletRequest
import org.springframework.stereotype.Controller
import org.springframework.ui.ModelMap
import org.springframework.web.bind.annotation.RequestMapping
import org.springframework.web.bind.annotation.RequestParam
import org.springframework.web.multipart.MultipartFile
@Controller
public class UploadAction {
@RequestMapping(value = "/upload.do")
public String upload(@RequestParam(value = "file", required = false) MultipartFile file, HttpServletRequest request, ModelMap model) {
System.out.println("开始")
String path = request.getSession().getServletContext().getRealPath("upload")
String fileName = file.getOriginalFilename()
//String fileName = new Date().getTime()+".jpg"
System.out.println(path)
File targetFile = new File(path, fileName)
if(!targetFile.exists()){
targetFile.mkdirs()
}
//保存
try {
file.transferTo(targetFile)
} catch (Exception e) {
e.printStackTrace()
}
model.addAttribute("fileUrl", request.getContextPath()+"/upload/"+fileName)
return "result"
}
}
index.jsp
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<%@ page pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>上传图片</title>
</head>
<body>
<form action="upload.do" method="post" enctype="multipart/form-data">
<input type="file" name="file" /><input type="submit" value="Submit" /></form>
</body>
</html>
WEB-INF/jsp/下的result.jsp
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<%@ page pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>上传结果</title>
</head>
<body>
<img alt="" src="${fileUrl }" />
</body>
</html>
springmvc文核枯或件上传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,存放上传的文败敬件
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"/><br>
8 age: <sf:input path="age"/><br>
9 photo: <input type="file" name="photo"/><br>
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、文件上传改伍功能实现 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>
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