WEB文件上传二 （Struts 文件上传）

Struts文件长传

 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
 2 <%
 3 String path = request.getContextPath();
 4 String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
 5 %>
 6 
 7 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
 8 <html>
 9   <head>
10     <base href="<%=basePath%>">
11     
12     <title>My JSP 'fileUpLoad.jsp' starting page</title>
13     
14     <meta http-equiv="pragma" content="no-cache">
15     <meta http-equiv="cache-control" content="no-cache">
16     <meta http-equiv="expires" content="0">    
17     <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
18     <meta http-equiv="description" content="This is my page">
19     <!--
20     <link rel="stylesheet" type="text/css" href="styles.css">
21     -->
22 
23   </head>
24   
25   <body>
26 
27   <!-- method="post" enctype="multipart/from-data"必须这样的 -->
28     <form action="FileUpload" method="post" enctype="multipart/form-data">
29     username:<input type="text" name="username"><br>
30     file:<input type="file" name="file"><br>
31         <input type="submit" value="submit">
32     </form>
33   </body>
34 </html>
fileupload.jsp

FileUpload.action

 1 package fileupload;
 2 
 3 import java.io.File;
 4 import java.io.FileInputStream;
 5 import java.io.FileOutputStream;
 6 import java.io.InputStream;
 7 import java.io.OutputStream;
 8 
 9 import org.apache.struts2.ServletActionContext;
10 
11 import com.opensymphony.xwork2.ActionSupport;
12 
13 public class FileUpload extends ActionSupport
14 {
15     private String username;
16     private File file;
17     private String fileContentType;
18     private String fileFileName;
19     public String getUsername()
20     {
21         return username;
22     }
23     public void setUsername(String username)
24     {
25         this.username = username;
26     }
27     public File getFile()
28     {
29         return file;
30     }
31     public void setFile(File file)
32     {
33         this.file = file;
34     }
35     public String getFileContentType()
36     {
37         return fileContentType;
38     }
39     public void setFileContentType(String fileContentType)
40     {
41         this.fileContentType = fileContentType;
42     }
43     public String getFileFileName()
44     {
45         return fileFileName;
46     }
47     public void setFileFileName(String fileFileName)
48     {
49         this.fileFileName = fileFileName;
50     }
51     
52     @Override
53     public String execute() throws Exception
54     {
55         String root = ServletActionContext.getRequest().getRealPath("/upload");
56         System.out.println("存储的路径是：" + root);
57         InputStream in = new FileInputStream(file);
58         System.out.println(fileFileName);
59         File file2 = new File(root,fileFileName);
60         OutputStream os = new FileOutputStream(file2);
61         int length = 0;
62         byte[] buffer = new byte[400];
63         while(-1!=(length = in.read(buffer)))
64         {
65             os.write(buffer, 0, length);
66         }
67         in.close();
68         os.close();
69         
70         return SUCCESS;
71     }
72     
73     
74     
75     
76     
77     
78     
79     
80     
81     
82     
83     
84     
85     
86     
87     
88     
89     
90     
91     
92     
93     
94     
95     
96     
97     
98 }
FileUpLoad.java

这里的三个属性要注意

private File file;
private String fileContentType;
private String fileFileName;  这三个属性分别得是用来封装 上传文件 名字 类型的。

名字都是固定的，再表单里要上传的File的名字是什么就因该命名为什么  例如 ：file:<input type="file" name="abc"><br>,

则三个属性的名为为：

private File abc;
private String abcContentType;
private String abcFileName;

最后莫忘记再struts.xml配置action信息

1         <action name="FileUpload" class="fileupload.FileUpload">
2             <result name="success">
3                 /FileUpLoadResult.jsp
4             </result>
5         </action>
FileUpLoadResult.jsp页面展示文件名以及文件类型。

<s:property value="fileFileName"/><br>
<s:property value = "fileContentType"/>

多个文件长传与上面的单个文件上传的方式相差无几，就是把封装文件，文件名，文件雷系的三个的属性改为LIST

 1 package fileupload;
 2 
 3 import java.io.File;
 4 import java.io.FileInputStream;
 5 import java.io.FileOutputStream;
 6 import java.io.InputStream;
 7 import java.io.OutputStream;
 8 import java.util.List;
 9 
10 import org.apache.struts2.ServletActionContext;
11 
12 import com.opensymphony.xwork2.ActionSupport;
13 
14 public class MultiFileUpLoad extends ActionSupport
15 {
16     /**
17      * 
18      */
19     private static final long serialVersionUID = 3691843913552291529L;
20     private String username;
21     private List<File> file;
22     private List<String> fileFileName;
23     private List<String> fileContentType;
24     public String getUsername()
25     {
26         return username;
27     }
28     public void setUsername(String username)
29     {
30         this.username = username;
31     }
32     public List<File> getFile()
33     {
34         return file;
35     }
36     public void setFile(List<File> file)
37     {
38         this.file = file;
39     }
40     public List<String> getFileFileName()
41     {
42         return fileFileName;
43     }
44     public void setFileFileName(List<String> fileFileName)
45     {
46         this.fileFileName = fileFileName;
47     }
48     public List<String> getFileContentType()
49     {
50         return fileContentType;
51     }
52     public void setFileContentType(List<String> fileContentType)
53     {
54         this.fileContentType = fileContentType;
55     }
56     
57     @Override
58     public String execute() throws Exception
59     {
60         String root = ServletActionContext.getRequest().getRealPath("/upload");
61         
62         for(int i = 0;i<file.size();i++)
63         {
64             File out = new File(root,fileFileName.get(i));
65             InputStream in = new FileInputStream(file.get(i));
66             OutputStream os = new FileOutputStream(out);
67             byte[] b = new byte[400];
68             int length = 0;
69             while(-1!=(length = in.read(b)))
70             {
71                 os.write(b, 0, length);
72             }
73             os.close();
74             in.close();
75         }
76         
77         return SUCCESS;
78     }
79 }
MultiFileUpLoad

结果页的展示与上面一样

莫忘记配置struts.xml

1 <action name="multlfileupload" class="fileupload.MultiFileUpLoad">
2             <result name="success">
3                 /FileUpLoadResult.jsp
4             </result>
5             <interceptor-ref name="fileUpload">
6                 <param name="maximumSize">99999999999</param>
7             </interceptor-ref>
8             <interceptor-ref name="defaultStack"></interceptor-ref>
9         </action>
5             <interceptor-ref name="fileUpload"> struts 再处理文件上传的拦截器 fileUpload 可去strurs-....core.jar 中查看下源码
 6 <param name="maximumSize">99999999999</param> 制定默认上传问价大小的最大值。 7 </interceptor-ref> 8 <interceptor-ref name="defaultStack"></interceptor-ref>
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原文地址：https://www.cnblogs.com/mauiie/p/3750995.html