Struts2 文件上传和下载

首先我们写一个单文件长传的fileupload.jsp：

1 <body>
2     <s:fielderror></s:fielderror> <!-- 报错信息 -->
3     <s:form action="upload" method="post" enctype="multipart/form-data">//以二进制格式格式
4         文件：<s:file label="文件上传" name="java1234"></s:file> //文件
5               <s:submit value="提交"></s:submit>
6     </s:form>
7 </body>

写一个单文件上传FileuploadAction:

 1 public class FileuploadAction extends ActionSupport{
 2     private static final long serialVersionUID = 1L;
 3     private File java1234;//文件
 4     private String java1234FileName;//文件名称
 5     private String java1234ContentType;//文件类型
 6     public File getJava1234() {
 7         return java1234;
 8     }
 9     public void setJava1234(File java1234) {
10         this.java1234 = java1234;
11     }
12     public String getJava1234FileName() {
13         return java1234FileName;
14     }
15     public void setJava1234FileName(String java1234FileName) {
16         this.java1234FileName = java1234FileName;
17     }
18     public String getJava1234ContentType() {
19         return java1234ContentType;
20     }
21     public void setJava1234ContentType(String java1234ContentType) {
22         this.java1234ContentType = java1234ContentType;
23     }
24     @Override
25     public String execute() throws Exception {
26         System.out.println("文件名称："+java1234FileName);
27         System.out.println("文件类型"+java1234ContentType);
28         File destFile=new File("D:/"+java1234FileName);
29         FileUtils.copyFile(java1234, destFile);
30         return SUCCESS;
31     }
32 }

配置struts.xml：

 1 <?xml version="1.0" encoding="UTF-8" ?>
 2 <!DOCTYPE struts PUBLIC
 3     "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
 4     "http://struts.apache.org/dtds/struts-2.0.dtd">
 5 <struts>
 6     <constant name="struts.multipart.maxSize" value="520000000"></constant>//文件的最大为520M
 7     <package name="manager" extends="struts-default">
 8         <action name="upload" class="com.java1234.action.FileuploadAction">
 9             <result name="input">/fileupload.jsp</result>
10             <result name="success">/success.jsp</result>
11             <!-- <interceptor-ref name="fileUpload">可以设置拦截器对长传的文件进行拦截处理。
12                 <param name="allowedTypes">image/bmp,image/x-png,image/gif,image/jpg,image/jpeg,audio/mp3</param>
13                 <param name="maximumSize">15728640</param>15MB
14             </interceptor-ref>
15             <interceptor-ref name="defaultStack"></interceptor-ref> -->
16         </action>
17     </package>
18 </struts>

效果：

多文件上传：

filesupload.Jsp

1 <body>
2     <s:fielderror></s:fielderror> <!-- 报错信息 -->
3         <s:form action="uploads" method="post" enctype="multipart/form-data">
4             <s:file label="文件上传1" name="java1234"></s:file>
5             <s:file label="文件上传2" name="java1234"></s:file>
6             <s:file label="文件上传3" name="java1234"></s:file>
7             <s:submit value="提交"></s:submit>
8         </s:form>
9 </body>

FilesUploadAction代码：

 1 public class FilesuploadAction extends ActionSupport{
 2     private static final long serialVersionUID = 1L;
 3     private File[] java1234;//文件
 4     private String[] java1234FileName;//文件名称
 5     private String[] java1234ContentType;//文件类型
 6     public File[] getJava1234() {
 7         return java1234;
 8     }
 9     public void setJava1234(File[] java1234) {
10         this.java1234 = java1234;
11     }
12 
13     public String[] getJava1234FileName() {
14         return java1234FileName;
15     }
16 
17     public void setJava1234FileName(String[] java1234FileName) {
18         this.java1234FileName = java1234FileName;
19     }
20     public String[] getJava1234ContentType() {
21         return java1234ContentType;
22     }
23     public void setJava1234ContentType(String[] java1234ContentType) {
24         this.java1234ContentType = java1234ContentType;
25     }
26     @Override
27     public String execute() throws Exception {
28         for(int i=0;i<java1234.length;i++){
29             System.out.println("文件名称："+java1234FileName[i]);
30             System.out.println("文件类型"+java1234ContentType[i]);
31             File destFile=new File("D:/"+java1234FileName[i]);
32             FileUtils.copyFile(java1234[i], destFile);
33         }
34         return SUCCESS;
35     }
36 }

使用数组进行处理。

下载文件jsp：

1 <body>
2     <a href="download">文件下载</a>
3 </body>

FiledownloadAction代码：

 1 public class FiledownloadAction extends ActionSupport{
 2     private static final long serialVersionUID = 1L;
 3     private String fileName;
 4     public String getFileName() throws Exception{
 5         fileName=new String(fileName.getBytes(),"IOS8859-1");
 6         return fileName;
 7     }
 8     public void setFileName(String fileName) {
 9         this.fileName = fileName;
10     }
11     public InputStream getInputStream()throws Exception{
12         File newfile=new File("D:/文件名.jpg");
13         this.fileName="文件名";
14         return new FileInputStream(newfile);
15     }
16 }

Struts.xml文件配置：

 1 <struts>
 2     <constant name="struts.multipart.maxSize" value="520000000"></constant>
 3     <package name="manager" extends="struts-default">
 4         <action name="uploads" class="com.java1234.action.FilesuploadAction">
 5             <result name="input">/filesupload.jsp</result>
 6             <result name="success">/success.jsp</result>
 7         </action>
 8         <action name="download" class="com.java1234.action.FiledownloadAction">
 9             <result type="stream">
10                 <param name="contentDisposition">attachment;filename=${fileName}</param>
11             </result>
12         </action>
13     </package>
14 </struts>