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Struts2实现文件下载

2013-05-30 20:20 176 查看

struts.xml

<action name="downloadfile" class="com.pb.action.user.DownloadAction">
<!-- <param name="inputPath">upload/测试.doc</param>
<param name="fileName">测试.doc</param>
-->
<result name="success" type="stream">
<param name="contentType">application/vnd.ms-word</param>
<param name="contentDisposition">attachment;charset=UTF-8;filename="${downloadFileName}"</param>
<param name="inputName">downloadFile</param>
</result>
</action>

Action

import java.io.InputStream;
import java.io.UnsupportedEncodingException;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class DownloadAction extends ActionSupport{
private String fileName;// 初始的通过param指定的文件名属性
private String inputPath;// 指定要被下载的文件路径

public String getFileName() {
return fileName;
}

public void setFileName(String fileName) {
try {
String fm=new String(fileName.getBytes("ISO-8859-1"),"UTF-8");
this.fileName = fm;
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
//this.fileName=fileName;
System.out.println("filename-->"+this.fileName);
}

public InputStream getDownloadFile()
{
return ServletActionContext.getServletContext().getResourceAsStream("upload/"+fileName);
}

/** 提供转换编码后的供下载用的文件名 */
public String getDownloadFileName() {
//this.setFileName("复件测试.doc");
String downFileName = fileName;
/*try {
downFileName = new String(downFileName.getBytes(""), "ISO-8859-1");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}*/
return downFileName;
}

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

jsp:

<body>
<a href="downloadfile?fileName=啊.doc">啊.doc</a><br>
</body>

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