Struts2文件预览与下载
Struts2文件预览与下载
1、Jar包列表
2、com.efund.read.action.ReadAction
package com.efund.read.action;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.io.InputStreamReader;
import https://www.wendangku.net/doc/7a6493287.html,.URLEncoder;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.interceptor.ServletRequestAware;
import com.opensymphony.xwork2.ActionSupport;
public class ReadAction extends ActionSupport implements ServletRequestAware {
private HttpServletRequest request;
private InputStream inputStream;
private String filename;
public String getFilename() throws Exception {
return URLEncoder.encode(filename,"UTF-8");
}
public void setFilename(String filename) throws Exception{
byte[] buf = filename.getBytes("ISO8859-1");
filename = new String(buf,"UTF-8");
this.filename = filename;
}
public InputStream getInputStream() {
return inputStream;
}
@Override
public void setServletRequest(HttpServletRequest request) { this.request = request;
}
public String readReq(){
String path =
request.getSession().getServletContext().getRealPath("/") +
"file\\request\\Contact.java";
try {
inputStream = new FileInputStream(new File(path));
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
// request.getSession().setAttribute("message", "读取request文件");
return "stream";
}
public String readRes(){
String path =
request.getSession().getServletContext().getRealPath("/") +
"file\\response\\Book.java";
try {
inputStream = new FileInputStream(new File(path));
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
return "stream";
}
public String read(){
//读取request文件
String path =
request.getSession().getServletContext().getRealPath("/") +
"file\\request\\Contact.java";
System.out.println("path-->" + path);
StringBuilder sb = new StringBuilder();
try {
// 字节流
FileInputStream fis = new FileInputStream(path);
// 字符流
InputStreamReader isr = new InputStreamReader(fis,"utf-8");
// 缓冲流
BufferedReader br = new BufferedReader(isr);
String line = null;
//逐行读,每读完一行加
while((line = br.readLine() )!=null) {
sb.append(line);
sb.append("
");
}
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
request.setAttribute("request", sb.toString());
//读取response文件
sb = new StringBuilder();
path = request.getSession().getServletContext().getRealPath("/") + "file\\response\\Book.java";
try {
// 字节流
FileInputStream fis = new FileInputStream(path);
// 字符流
InputStreamReader isr = new InputStreamReader(fis,"utf-8");
// 缓冲流
BufferedReader br = new BufferedReader(isr);
String line = null;
while((line = br.readLine() )!=null) {
sb.append(line);
sb.append("
");
}
} catch (Exception e) {
e.printStackTrace();
throw new RuntimeException(e);
}
request.setAttribute("response", sb.toString());
return "result";
}
public String downReq(){
String path =
request.getSession().getServletContext().getRealPath("/") +
"file\\request\\" + filename;
try {
inputStream = new FileInputStream(path);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return "download";
}
public String downRes(){
String path =
request.getSession().getServletContext().getRealPath("/") +
"file\\response\\" + filename;
try {
inputStream = new FileInputStream(path);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
return "download";
}
}
3、struts.xml
"https://www.wendangku.net/doc/7a6493287.html,/dtds/struts-2.1.dtd">
/index1.jsp
name="contentDisposition">attachment;filename=${filename} inputStream 4、web.xml xmlns="https://www.wendangku.net/doc/7a6493287.html,/xml/ns/javaee" xmlns:xsi="https://www.wendangku.net/doc/7a6493287.html,/2001/XMLSchema-instance" xsi:schemaLocation="https://www.wendangku.net/doc/7a6493287.html,/xml/ns/javaee https://www.wendangku.net/doc/7a6493287.html,/xml/ns/javaee/web-app_2_5.xsd"> org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFi lter 5、预览与下载解决方案 访问http://localhost:8080/项目名/index1.jsp index1.jsp <%@page language="java"import="java.util.*"pageEncoding="UTF-8"%> <%@taglib uri="https://www.wendangku.net/doc/7a6493287.html,/jsp/jstl/core"prefix="c"%>
| request文件 | response文件 |
|---|---|
href="read_downReq.action?filename=Contact.java">下载request文件 | href="read_downRes.action?filename=Book.java">下载response文件 |
| ${requestScope.request} | ${requestScope.response} |
6、预览方案2，frameset标签
访问：http://localhost:8080/项目名
1) index.jsp
<%@page language="java"import="java.util.*"pageEncoding="UTF-8"%> <%@taglib uri="https://www.wendangku.net/doc/7a6493287.html,/jsp/jstl/core"prefix="c"%>
2) top.jsp
<%@page language="java"import="java.util.*"pageEncoding="UTF-8"%> <%@taglib uri="https://www.wendangku.net/doc/7a6493287.html,/jsp/jstl/core"prefix="c"%>
${message}
top
3) Request.jsp
<%@page language="java"import="java.util.*"pageEncoding="UTF-8"%> <%@taglib uri="https://www.wendangku.net/doc/7a6493287.html,/jsp/jstl/core"prefix="c"%>
4)Response.jsp
<%@page language="java"import="java.util.*"pageEncoding="UTF-8"%> <%@taglib uri="https://www.wendangku.net/doc/7a6493287.html,/jsp/jstl/core"prefix="c"%>