Struts文件上传机制

 

 

单文件上传

1.Action类

 

 1 package FileUpload;
 2 
 3 import java.io.File;
 4 import java.io.FileInputStream;
 5 import java.io.FileNotFoundException;
 6 import java.io.FileOutputStream;
 7 
 8 import javax.servlet.ServletContext;
 9 
10 import org.apache.struts2.ServletActionContext;
11 
12 import com.opensymphony.xwork2.ActionSupport;
13 
14 public class FileUpload  extends ActionSupport{
15 
16     private File fileName;
17     private String fileNameContentType;
18     private String fileNameFileName;
19     
20     public String execute() throws Exception{
21         
22         ServletContext servletContext = ServletActionContext.getServletContext();
23         String dir = servletContext.getRealPath("/files/"+fileNameFileName);
24         System.out.println(dir);


25         FileOutputStream outputStream = new FileOutputStream(dir);
26         FileInputStream inputStream = new FileInputStream(fileName);
27         byte[] buffer = new byte[1024];
28         int len = 0;
29 //        从此输入流中将最多 b.length 个字节的数据读入一个 byte 数组中.读入缓冲区的字节总数，如果因为已经到达文件末尾而没有更多的数据，则返回 -1。
30         while((len = inputStream.read(buffer))!=-1){
31 //            将指定 byte 数组中从偏移量 off 开始的 len 个字节写入此文件输出流。
32             outputStream.write(buffer, 0, len);
33         }
34         inputStream.close();
35         outputStream.close();


36         return SUCCESS;
37     }
38 
39     public File getFileName() {
40         return fileName;
41     }
42 
43     public void setFileName(File fileName) {
44         this.fileName = fileName;
45     }
46 
47     public String getFileNameContentType() {
48         return fileNameContentType;
49     }
50 
51     public void setFileNameContentType(String fileNameContentType) {
52         this.fileNameContentType = fileNameContentType;
53     }
54 
55     public String getFileNameFileName() {
56         return fileNameFileName;
57     }
58 
59     public void setFileNameFileName(String fileNameFileName) {
60         this.fileNameFileName = fileNameFileName;
61     }
62 
63 
64     
65 }

 2.

 1 <!DOCTYPE html>
 2 <html>
 3 <head>
 4 <meta charset="UTF-8">
 5 <title>Insert title here</title>
 6 </head>
 7 <body>
 8 
 9 <form action="/Struts2FileUpload/fileUp.action" method="post" enctype ="multipart/form-data">
10 
11 <input type="file" name="fileName" >
12 <input type="submit" value="提交">
13 </form>
14 
15 </body>
16 </html>

 3.

 <action name="fileUp" class="FileUpload.FileUpload">
            <result>/message.jsp</result>
 </action>

 

 

 

多文件上传

可以用数组，也可以用list集合

1.HTML

 1 <!DOCTYPE html>
 2 <html>
 3 <head>
 4 <meta charset="UTF-8">
 5 <title>Insert title here</title>
 6 </head>
 7 <body>
 8 
 9 <form action="/Struts2FileUpload/filesUp.action" method="post" enctype ="multipart/form-data">
10 
11 <input type="file" name="fileName" >
12 <input type="file" name="fileName" >
13 <input type="file" name="fileName" >
14 <input type="submit" value="提交">
15 </form>
16 
17 </body>
18 </html>

注意：input的name名字一样

 

2.Action接收请求

可以用数组接收，也可以用集合接收

 1 package FileUpload;
 2 
 3 import java.io.File;
 4 import java.io.FileInputStream;
 5 import java.io.FileNotFoundException;
 6 import java.io.FileOutputStream;
 7 
 8 import javax.servlet.ServletContext;
 9 
10 import org.apache.struts2.ServletActionContext;
11 
12 import com.opensymphony.xwork2.ActionSupport;
13 
14 public class FilesUpload  extends ActionSupport{
15 
16     private File[] fileName;
17     private String[] fileNameContentType;
18     private String[] fileNameFileName;
19     
20     public String execute() throws Exception{
21         
22         for(int i=0;i<fileName.length;i++){
23             ServletContext servletContext = ServletActionContext.getServletContext();
24             String dir = servletContext.getRealPath("/files/"+fileNameFileName[i]);
25             System.out.println(dir);
26             FileOutputStream outputStream = new FileOutputStream(dir);
27             FileInputStream inputStream = new FileInputStream(fileName[i]);
28             byte[] buffer = new byte[1024];
29             int len = 0;
30 //        从此输入流中将最多 b.length 个字节的数据读入一个 byte 数组中.读入缓冲区的字节总数，如果因为已经到达文件末尾而没有更多的数据，则返回 -1。
31             while((len = inputStream.read(buffer))!=-1){
32 //            将指定 byte 数组中从偏移量 off 开始的 len 个字节写入此文件输出流。
33                 outputStream.write(buffer, 0, len);
34             }
35             inputStream.close();
36             outputStream.close();
37         }
38         return SUCCESS;
39     }
40 
41     public File[] getFileName() {
42         return fileName;
43     }
44 
45     public void setFileName(File[] fileName) {
46         this.fileName = fileName;
47     }
48 
49     public String[] getFileNameContentType() {
50         return fileNameContentType;
51     }
52 
53     public void setFileNameContentType(String[] fileNameContentType) {
54         this.fileNameContentType = fileNameContentType;
55     }
56 
57     public String[] getFileNameFileName() {
58         return fileNameFileName;
59     }
60 
61     public void setFileNameFileName(String[] fileNameFileName) {
62         this.fileNameFileName = fileNameFileName;
63     }
64 
65 
66 
67     
68 }

 

3.测试结果

 

 

3.通过配置设置文件上传类型，大小，后缀名

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
 4     "http://struts.apache.org/dtds/struts-2.3.dtd">
 5 
 6 <struts>
 7 
 8     <constant name="struts.devMode" value="true"></constant>
 9     
10     
11     <!-- package命名空间 -->
12     <package name="test" namespace="/" extends="struts-default">
13     
14     <!-- 配置允许文件上传类型与大小的配置 -->
15     <interceptors>
16             
17             <!-- 配置拦截器 -->
18             <interceptor-stack name="atguigustack">
19                 <interceptor-ref name="defaultStack">
20                     <!-- 设置单个文件上传大小 -->
21                     <param name="fileUpload.maximumSize">5000000</param>
22                     <!-- 设置文件类型，可以先上传一个，打印出contentType -->
23                     <param name="fileUpload.allowedTypes">text/html,text/xml,application/pdf</param>
24                     <!-- 设置允许上传的文件后缀名 -->
25                     <param name="fileUpload.allowedExtensions">html,dtd,xml,zip,pdf</param> 
26                 </interceptor-ref>
27             </interceptor-stack>
28         </interceptors>
29         
30         <!-- 应用拦截器 -->
31         <default-interceptor-ref name="atguigustack"></default-interceptor-ref>
32     
33         <action name="fileUpload" class="fileUpload">
34             <result>/index.jsp</result>
35         </action>
36         
37          <action name="fileUpload2" class="fileUpload2">
38             <result>/index.jsp</result>
39         </action>
40         
41         
42         <action name="fileUp" class="FileUpload.FileUpload">
43             <result>/message.jsp</result>
44         </action>
45         
46         <action name="filesUp" class="FileUpload.FilesUpload">
47             <result>/message.jsp</result>
48         </action>
49         
50         
51         
52     </package>
53     
54   </struts>

 

posted @ 2017-07-15 17:01  QiaoZhi  阅读(316)  评论(0)  编辑  收藏  举报