spring mvc(注解)上传文件的简单例子

超、凢脫俗 2022-08-07 03:56 133阅读 0赞

# [        spring mvc(注解)上传文件的简单例子        ][spring mvc_] #

分类：            [ spring][spring][mvc][] 2011-12-19 16:25 30998人阅读 [评论][Link 1](7) 收藏 [举报][Link 2]

[spring][spring 1] [mvc][mvc 1] [bean][] [encoding][] [class][] [string][]

spring mvc(注解)上传文件的简单例子,这有几个需要注意的地方  
1.form的enctype=”multipart/form-data” 这个是上传文件必须的  
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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1.  <?xml version="1.0" encoding="UTF-8"?> 
2.  <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"> 
3.    <display-name>webtest</display-name> 
4.   
5.    <listener> 
6.          <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 
7.      </listener> 
8.      <context-param> 
9.          <param-name>contextConfigLocation</param-name> 
10.         <param-value> 
11.             /WEB-INF/config/applicationContext.xml 
12.             /WEB-INF/config/codeifAction.xml 
13.         </param-value> 
14.     </context-param> 
15.  
16.     <servlet> 
17.         <servlet-name>dispatcherServlet</servlet-name> 
18.         <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
19.         <init-param> 
20.             <param-name>contextConfigLocation</param-name> 
21.             <param-value>/WEB-INF/config/codeifAction.xml</param-value> 
22.         </init-param> 
23.         <load-on-startup>1</load-on-startup> 
24.     </servlet> 
25.      
26.     <servlet-mapping> 
27.         <servlet-name>dispatcherServlet</servlet-name> 
28.         <url-pattern>\*.do</url-pattern> 
29.     </servlet-mapping> 
30.  
31.   <welcome-file-list> 
32.     <welcome-file>index.do</welcome-file> 
33.   </welcome-file-list> 
34. </web-app>

<?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>
    
      <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>
        
        <servlet-mapping>
            <servlet-name>dispatcherServlet</servlet-name>
            <url-pattern>*.do</url-pattern>
        </servlet-mapping>
    
      <welcome-file-list>
        <welcome-file>index.do</welcome-file>
      </welcome-file-list>
    </web-app>

applicationContext.xml

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1.  <?xml version="1.0" encoding="UTF-8"?> 
2.  <beans xmlns="http://www.springframework.org/schema/beans" 
3.      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p" 
4.      xmlns:context="http://www.springframework.org/schema/context" 
5.      xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
6.      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd" 
7.      default-lazy-init="true"> 
8.   
9.       
10.     <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" lazy-init="false" /> 
11.  
12.      
13.     <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" /> 
14.  
15.      
16.     <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" /> 
17.  
18.      
19.     <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/> 
20.  
21. </beans>

<?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">
    
        
        <bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" lazy-init="false" />
    
        
        <bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping" />
    
        
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver" p:prefix="/WEB-INF/jsp/" p:suffix=".jsp" />
    
        
        <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"/>
    
    </beans>

codeifAction.xml

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UploadAction.java

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1.  package com.codeif.action; 
2.   
3.  import java.io.File; 
4.  import java.util.Date; 
5.   
6.  import javax.servlet.http.HttpServletRequest; 
7.   
8.  import org.springframework.stereotype.Controller; 
9.  import org.springframework.ui.ModelMap; 
10. import org.springframework.web.bind.annotation.RequestMapping; 
11. import org.springframework.web.bind.annotation.RequestParam; 
12. import org.springframework.web.multipart.MultipartFile; 
13.  
14. @Controller 
15. public class UploadAction \{ 
16.  
17.     @RequestMapping(value = "/upload.do") 
18.     public String upload(@RequestParam(value = "file", required = false) MultipartFile file, HttpServletRequest request, ModelMap model) \{ 
19.  
20.         System.out.println("开始"); 
21.         String path = request.getSession().getServletContext().getRealPath("upload"); 
22.         String fileName = file.getOriginalFilename(); 
23. //        String fileName = new Date().getTime()+".jpg"; 
24.         System.out.println(path); 
25.         File targetFile = new File(path, fileName); 
26.         if(!targetFile.exists())\{ 
27.             targetFile.mkdirs(); 
28.         \} 
29.  
30.         //保存 
31.         try \{ 
32.             file.transferTo(targetFile); 
33.         \} catch (Exception e) \{ 
34.             e.printStackTrace(); 
35.         \} 
36.         model.addAttribute("fileUrl", request.getContextPath()+"/upload/"\+fileName); 
37.  
38.         return "result"; 
39.     \} 
40.  
41. \}

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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1.  <%@ page pageEncoding="utf-8"%> 
2.  <!DOCTYPE html> 
3.  <html> 
4.  <head> 
5.  <meta charset="utf-8"> 
6.  <title>上传图片</title> 
7.  </head> 
8.  <body> 
9.  <form action="upload.do" method="post" enctype="multipart/form-data"> 
10. <input type="file" name="file" /> <input type="submit" value="Submit" /></form> 
11. </body> 
12. </html>

<%@ 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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1.  <%@ page pageEncoding="utf-8"%> 
2.  <!DOCTYPE html> 
3.  <html> 
4.  <head> 
5.  <meta charset="utf-8"> 
6.  <title>上传结果</title> 
7.  </head> 
8.  <body> 
9.  <img alt="" src="$\{fileUrl \}" /> 
10. </body> 
11. </html>

<%@ 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>

[spring mvc_]: http://blog.csdn.net/cheung1021/article/details/7084673
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[mvc]: http://blog.csdn.net/Cheung1021/article/category/934030
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[mvc 1]: http://www.csdn.net/tag/mvc
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