基于Struts2文件下载

struts.xml文件配置：↓

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
"http://struts.apache.org/dtds/struts-2.3.dtd">
<struts>
<constant name="struts.i18n.encoding" value="utf-8" />
<constant name="struts.serve.static.browserCache" value="false" />
<constant name="struts.devMode" value="true"/>
<constant name="struts.configuration.xml" value="true" />
<constant name="struts.objectFactory" value="spring"/>
<package name="default" namespace="/" extends="struts-default">
<!-- 这里将action扔个spring管理 -->
<action name="down" class="download">

<result type="stream">
<!-- 下载的文件类型，视图页面对应的类型可以通过tomcat里的web.xml搜索相应的文件类型 -->
<!--通过ognl表达式读取业务控制器Action的属性-->
<param name="contentType">${resType}</param>
<!-- 下载文件的关键返回方法 get方法 -->
<param name="inputName">inp</param>
<!-- 自定义被下载的文件名 -->
<param name="contentDispostion">fileName=${resName}</param>

</result>
</action>

<action name="*">
<result>/WEB-INF/view/{1}.jsp</result>
</action>
</package>
</struts>

DownloadAction.java↓

package com.ssh4.download;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionSupport;
@SuppressWarnings("serial")
public class DownloadAction extends ActionSupport {
private String res;    //资源文件，
private String resName;  //自定义被下载的文件名；
private String resType;  //文件类型
public String getRes() {
return res;
}
public void setRes(String res) throws UnsupportedEncodingException {
//处理中文资源文件
this.res = new String(res.getBytes("iso-8859-1"),"utf-8");
}
public String getResName() {
return resName;
}
public void setResName(String resName) {
this.resName = resName;
}
public String getResType() {
return resType;
}
public void setResType(String resType) {
this.resType = resType;
}
//下载文件必须有此方法
public InputStream getInp() throws FileNotFoundException{
//资源文件的路径
String path = ServletActionContext.getServletContext().getRealPath("/") +"WEB-INF\\download\\"+ res;
System.out.println(path);
return new FileInputStream(path);

}
}

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