struts2.0上傳和下載文件

在Struts.xml中的寫法：

 

<action name="upload" class="com.text.action.UpLoadAction">
       <result name="success">/upload/uploadResult.jsp</result>
       <result name="input">/upload/update.jsp</result>
       <interceptor-ref name="fileUpload">
        <param name="maximumSize">409600</param>
        <!--
        <param name="allowedTypes">application/vnd.ms-powerpoint</param>
         -->
        
       </interceptor-ref>
       
       <interceptor-ref name="defaultStack"></interceptor-ref>
       
      </action>

 

在UpLoadAction中：

 

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.List;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

 

public class UpLoadAction extends ActionSupport {

 private String username;
 private List<File> file;
 private List<String> fileFileName;
 private List<String> fileContentType;

 

 public String getUsername() {
  return username;
 }

 

 

 public void setUsername(String username) {
  this.username = username;
 } 

 

 

 public List<File> getFile() {
  return file;
 }

 

 

 public void setFile(List<File> file) {
  this.file = file;
 }

 

 

 public List<String> getFileFileName() {
  return fileFileName;
 }

 

 

 public void setFileFileName(List<String> fileFileName) {
  this.fileFileName = fileFileName;
 }

 

 

 public List<String> getFileContentType() {
  return fileContentType;
 }

 

 

 public void setFileContentType(List<String> fileContentType) {
  this.fileContentType = fileContentType;
 }

 

 

 @Override
 public String execute() throws Exception {

  for(int i=0;i<file.size();i++){
   
   InputStream is = new FileInputStream(file.get(i));

   String root = ServletActionContext.getRequest().getRealPath("/upload");

   File destFile = new File(root, this.getFileFileName().get(i));

   OutputStream os = new FileOutputStream(destFile);

   byte[] buffer = new byte[400];

   int length = 0;

   while ((length = is.read(buffer)) > 0) {
    os.write(buffer, 0, length);
   }
   is.close();
   os.close();
     
  }
  
  return SUCCESS;
 }
}

 

==============================================

 

 

下載文件：

在struts.xml中

 

action name="download" class="com.text.action.DownAction">
       <result name="success" type="stream">
        <param name="contentDisposition">filename="/aqiang.jpg"</param>
        <param name="inputName">downLoadFile</param>
       </result><!-- 這裏的strem專門提供下載,在源文件strtus-default.xml中已經定義 -->
      </action>

 

 

在DownAction中：

 

import java.io.InputStream;

import com.opensymphony.xwork2.ActionSupport;
import org.apache.struts2.ServletActionContext;

public class DownAction extends ActionSupport {

 public InputStream getDownLoadFile() {

  return ServletActionContext.getServletContext().getResourceAsStream(
    "/upload/aqiang.jpg");
 }

 @Override
 public String execute() throws Exception {
  
  return SUCCESS;
  
 }

}