Struts文件上传与下载详解_文件的下载

<a href="downLoad.action?fileName=1111.jpg">下载文件</a>

package org.web;
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
public class DownLoadAction extends ActionSupport {
  private String inputPath;
  private String fileName;
  private String contentType;
  private InputStream inputStream;
  
  
  public String excute(){
    
    return SUCCESS;
  }
  public String getInputPath() {
    return inputPath;
  }
  public void setInputPath(String inputPath) {
    this.inputPath = inputPath;
  }
  public String getFileName() {
    return fileName;
  }
  public void setFileName(String fileName) {
    this.fileName = fileName;
  }
  public String getContentType() {
    return contentType;
  }
  public void setContentType(String contentType) {
    this.contentType = contentType;
  }
  public InputStream getInputStream() throws FileNotFoundException {
    String path=ServletActionContext.getServletContext().getRealPath(inputPath);
    return new BufferedInputStream(new FileInputStream(path+"/"+fileName));
  }
  public void setInputStream(InputStream inputStream) {
    this.inputStream = inputStream;
  }
    
  
}

<!-- 文件下载 -->
    <action name="downLoad" class="org.web.DownLoadAction">
      <param name="inputPath">/upload</param>
      <result name="success" type="stream">
        <param name="contentType">application/octet-stream</param>
        <param name="inputName">inputStream</param>
        <param name="contentDisposition">
          
          attachment;filename="${fileName}"
        </param>
        <param name="bufferSize">4096</param>
      </result>
    </action>