struts2上传文件

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#struts2上传文件

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1.配置struts.xml

<?xml version="1.0"encoding="gbk"?>

<!DOCTYPE struts PUBLIC

"-//Apache Software Foundation//DTD StrutsConfiguration 2.0//EN"

"http://struts.apache.org/dtds/struts-2.0.dtd">

<paramname="allowedTypes">image/bmp,image/png,image/gif,image/jpeg,image/jpg,image/x-png

</param>

</interceptor-ref>

<interceptor-refname="defaultStack" />

<result>/WEB-INF/jsp/uploadSuccess.jsp</result>

<resultname="input">/WEB-INF/jsp/upload.jsp</result>

</action>

<actionname="*">

</action>

</package>

</struts>

<!-----------------------------配置上传Action----------------------------------------------!>

package com.book.struts.action;

import java.io.File;

import java.io.IOException;

import org.apache.commons.io.FileUtils;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.ModelDriven;

import com.pojo.FileInfo;

public class UploadAction extends ActionSupport implementsModelDriven<FileInfo> {

private FileInfo model = new FileInfo();

public String upload(){

// 获得服务器上保存上传文件的目录updfile的绝对路径

String realpath =ServletActionContext.getServletContext().getRealPath(

"/uploadfile");

// 设置保存文件的目录

model.setTargetdir(realpath);

// 设置目标文件名

model.setTargetfilename(generateFileName(model.getDocFileName()));

// 把doc内容复制到target

try {

FileUtils.copyFile(model.getDoc(), newFile(model.getTargetdir(),

model.getTargetfilename()));

} catch (IOException e) {

e.printStackTrace();

}

return SUCCESS;

}

// 产生唯一的文件名

private synchronized String generateFileName(String filename){

int position = filename.lastIndexOf(".");

String ext = filename.substring(position);

return System.nanoTime() + ext;

}

public FileInfo getModel() {

return model;

}

package com.pojo;

import java.io.File;

public class FileInfo {

private File doc; // 封装上传文件的属性

private String docFileName; // 封装上传文件的名称属性

private String docContentType; // 封装上传文件的类型属性

private String targetdir; // 保存路径

private String targetfilename; // 保存的文件名

public File getDoc() {

return doc;

}

public void setDoc(File doc) {

this.doc = doc;

}

public String getDocContentType() {

return docContentType;

}

public void setDocContentType(String docContentType) {

this.docContentType = docContentType;

}

public String getDocFileName() {

return docFileName;

}

public void setDocFileName(String docFileName) {

this.docFileName = docFileName;

}

public String getTargetdir() {

return targetdir;

}

public void setTargetdir(String targetdir) {

this.targetdir = targetdir;

}

public String getTargetfilename() {

return targetfilename;

}

public void setTargetfilename(String targetfilename) {

this.targetfilename = targetfilename;

}

<%@ page language="java" import="java.util.*"pageEncoding="utf-8"%>

<%@taglib prefix="s" uri="/struts-tags"%>

String path = request.getContextPath();

String basePath = request.getScheme() + "://"

+ request.getServerName() + ":" +request.getServerPort()

+ path + "/";

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01Transitional//EN">

<html>

<head>

<basehref="<%=basePath%>">

<title>Success</title>

</head>

<body>

上传文件类型：<s:propertyvalue="docContentType"/><br>

上传成功后文件位置：<s:propertyvalue="targetdir"/><br>

上传图片：<imgwidth=200 height=200 src="<s:propertyvalue="'uploadfile/'+targetfilename"/>"><br>

</body>

</html>

<!---------------------------上传页面upload.jsp-----------------------------------！>

<%@ page language="java" import="java.util.*"pageEncoding="utf-8"%>

<%@taglib prefix="s" uri="/struts-tags"%>

String path = request.getContextPath();

String basePath = request.getScheme() + "://"

+ request.getServerName() + ":" +request.getServerPort()

+ path + "/";

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01Transitional//EN">

<html>

<head>

<basehref="<%=basePath%>">

<title>upload</title>

</head>

<body>

<s:form action="uploadFile.action"method="post" enctype="multipart/form-data">

上传文件：<s:filename="doc"/><br/>

<s:fielderrorname="file"></s:fielderror>

<s:submit value="上传"/>

</s:form>

</body>

</html>

----------------------------------完成------------------------------------

上传文件注意事项

1.在上传页面form表单中enctype属性要设置成enctype="multipart/form-data"

2.在上传参数文件Fileinfo.java中

<1>类型为File的xxx属性封装了该文件域对应文件内容

<2> 类型为String的xxxFileName属性封装了该文件域对应的文件名

<3> 类型为String的xxxContentType属性封装了该文件域对应的文件类型