Struts2文件上传和下载
上传
index.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'upload.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!-- <link rel="stylesheet" type="text/css" href="styles.css"> -->
<script type="text/javascript" src="js/jquery-1.8.3.js"></script>
<script type="text/javascript"> $(function() { $("#btn_upd").click( function() { // alert($("#file").val().substring($("#file").val().lastIndexOf("\\")+1) ); $("#fname").val( $("#file").val().substring( $("#file").val().lastIndexOf("\\") + 1)); //提交 $("#upld").attr("action", "Upload.action").submit(); }); }); </script>
</head>
<body>
红色的地方需要注意
<p>struts2上传文件</p>
<form id="upld" method="post" enctype="multipart/form-data">
<input name="fname" id="fname" type="hidden">
这个type类型表示这个文件的File类型的
文件资料:<input type="file" id="file" name="upfile"><br> <input type="button" id="btn_upd" value="上传">
</form>
${msg }
</body>
</html>upload.jsp
<body>
<s:iterator var="fileName" value="fileNames" status="status">
<a href="downFile.action?fno=<s:property value="#status.count" />">
<s:property value="#fileName" /> </a>
<br>
</s:iterator>
</body>对应的Action处理类
package com.act;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.Result;
import com.opensymphony.xwork2.ActionSupport;
public class uploadFile extends ActionSupport{
private String fname;
private File upfile;
private String msg;
@Override
@Action(value = "Upload", results = { @Result(location = "upload.jsp") })
public String execute() throws Exception {
// 标准io流
BufferedInputStream bin = new BufferedInputStream(new FileInputStream(upfile));
BufferedOutputStream bos = new BufferedOutputStream(
//开辟了一个名为c:\\fname的空间来存文件
new FileOutputStream("C:\\" + fname));
byte[] buf = new byte[1024 * 10];
while (bin.read(buf) != -1) {
bos.write(buf);
}
bos.flush();
bos.close();
bin.close();
msg = fname + "上传成功！";
return SUCCESS;}
public String getFname() {
return fname;
}
public void setFname(String fname) {
this.fname = fname;
}
public File getUpfile() {
return upfile;
}
public void setUpfile(File upfile) {
this.upfile = upfile;
}
public String getMsg() {
return msg;
}
public void setMsg(String msg) {
this.msg = msg;
}
}
上传
文件下载也是前面的index.jsp,然后来个upload.jsp
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<% String path = request.getContextPath(); String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/"; %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'upload.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!-- <link rel="stylesheet" type="text/css" href="styles.css"> -->
<script type="text/javascript" src="js/jquery-1.8.3.js"></script>
<script type="text/javascript"> $(function() { $("#btn_upd").click( function() { // alert($("#file").val().substring($("#file").val().lastIndexOf("\\")+1) ); $("#fname").val( $("#file").val().substring( $("#file").val().lastIndexOf("\\") + 1)); //提交 $("#upld").attr("action", "Upload.action").submit(); }); }); </script>
</head>
<body>
<p>struts2上传文件</p>
<form id="upld" method="post" enctype="multipart/form-data">
<input name="fname" id="fname" type="hidden">
文件资料:<input type="file" id="file" name="upfile"><br> <input type="button" id="btn_upd" value="上传">
</form>
${msg }
</body>
</html>
对应的action处理
package com.act;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import com.opensymphony.xwork2.ActionSupport;
@ParentPackage("down")
public class DownAction extends ActionSupport {
private String[] fileNames;
private Integer fno;
private String fname;
private String tmp;
private final static String downPath = "F:\\test";
private String mimeType;
@Action(value = "toDown", results = { @Result(location = "down.jsp") })
public String execute() throws Exception {
// TODO Auto-generated method stub
File file = new File(downPath);
//默认放到值栈里面
fileNames = file.list();
return SUCCESS;
}
public String downFile() throws Exception {
HttpServletRequest request = ServletActionContext.getRequest();
// 文件编号 -->文件名
fileNames = new File(downPath).list();
tmp = fileNames[fno - 1];
fname = tmp;
// fname = java.net.URLEncoder.encode(fname, "UTF-8");
try {
String path = downPath + "//"
+ new String(fname.getBytes("ISO8859-1"), "utf-8");
System.out.println(path);
mimeType = ServletActionContext.getServletContext().getMimeType(
path)
+ ";charset=UTF-8";
System.out.println("mimeType:" + mimeType);
String agent = request.getHeader("USER-AGENT");
System.out.println(agent);
if (null != agent) {
if (-1 != agent.indexOf("Firefox")) {// Firefox
mimeType = mimeType.replace("UTF-8", "ISO8859-1");
fname = new String(fname.getBytes("GB2312"), "ISO-8859-1");
} else {// IE7+ Chrome
System.out.println("IE,Chrome");
// fname = new String(fname.getBytes("ISO8859-1"), "utf-8");
System.out.println("--------------->" + fname);
fname = java.net.URLEncoder.encode(fname, "UTF-8");
System.out.println("--------------->" + fname);
}
}
System.out.println(fname);
} catch (Exception e) {
System.out.println("下载文件信息出错。");
}
return SUCCESS;
}
public String getFname() {
return fname;
}
public void setFname(String fname) {
this.fname = fname;
}
// ///真正操作下载的逻辑
public InputStream getDownFile() throws FileNotFoundException {
return new FileInputStream(new File(downPath, tmp));
}
public Integer getFno() {
return fno;
}
public void setFno(Integer fno) {
this.fno = fno;
}
public String[] getFileNames() {
return fileNames;
}
public void setFileNames(String[] fileNames) {
this.fileNames = fileNames;
}
}