Struts2.0上传初步学习

   这两天看了一下struts2.0的上传，实现一个简单的例子很简单，我是从strtus2.0自带的一个例子看的，也没有经过修改就可以实现上传了，但下载还是出现了一些问题。最开始接触的时候出现了一个问题，也就是包的问题或者说是配置的问题，在web.xml里面仅仅是配置了struts的映射，导致每次启动的时候说找不着一个东西，然后又发现包存在问题，因为使用的是myEclipse，在里面选的加入自定义的一个userLibery库，貌似这样是不行，以前也碰到这种情况，那个时候还不清楚，像这一次，我把那几个需要的包直接添加进去之后就可以运行了。其实也有可能触发此问题的是和其它的一些包起冲突，没有去证明这个推断的正确性。
     下面就说一下怎么实现这上传的功能吧。
      首先是把包给加入进去，参考了一下网上的例子，因此就只加入了一下几个包

xwork-2.04.jar 
commons-loggin-1.0.4.jar
ognl-2.6.11.jar
struts2-core-1.011.jar
commons-fileupload-1.1.1.jar
commons-io-1.1.jar 

web.xml的配置如下：

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_9" version="2.4" 
	xmlns="http://java.sun.com/xml/ns/j2ee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
    </filter>
 	<filter>
        <filter-name>struts-cleanup</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ActionContextCleanUp</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
	<filter-mapping>
        <filter-name>struts-cleanup</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.jsp</welcome-file>
        <welcome-file>index.html</welcome-file>
    </welcome-file-list>

</web-app>

struts.xml的配置如下：

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<!-- START SNIPPET: xworkSample -->
<struts>
    <include file="struts-fileupload.xml" />
</struts>

struts-fileupload.xml配置如下：

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
	<package name="fileupload" extends="struts-default" namespace="/fileupload">
        
        <action name="upload" class="com.struts.fileupload.FileUploadAction" method="input">
        	<result>upload.jsp</result>
		</action>

        <action name="doUpload" class="com.struts.fileupload.FileUploadAction" method="upload">        	  
        	<result name="input">upload.jsp</result>
			<result>upload-success.jsp</result>
		</action>
		
		<action name="multipleUploadUsingList">
			<interceptor-ref name="fileUpload">
	              <!-- 配置允许上传的文件类型，多个用","分隔 -->
	              <param name="allowedTypes">
	    　　　　　　image/bmp,image/png,image/gif,image/jpeg,image/jpg 
	,image/x-png, image/pjpeg
	              </param>
	              <!-- 配置允许上传的文件大小，单位字节 -->
	              <param name="maximumSize">1024000000</param>
	           </interceptor-ref>
	            <param name="savePath">/temp</param> 
			<result>multipleUploadUsingList.jsp</result>
		</action>
		
		<action name="doMultipleUploadUsingList" class="com.struts.fileupload.MultipleFileUploadUsingListAction" method="upload">
			<result>multipleUploadUsingList-success.jsp</result>
		</action>


		<action name="multipleUploadUsingArray">
			<result>multipleUploadUsingArray.jsp</result>
		</action>

		<action name="doMultipleUploadUsingArray" class="com.struts.fileupload.MultipleFileUploadUsingArrayAction" method="upload">
			<result>multipleUploadUsingArray-success.jsp</result>
		</action>


    </package>
</struts>

fileUploadAction.java如下：

package com.struts.fileupload;

import java.io.File;

import com.opensymphony.xwork2.ActionSupport;

/**
 * Show case File Upload example's action. <code>FileUploadAction</code>
 *
 */
public class FileUploadAction extends ActionSupport {

    private static final long serialVersionUID = 5156288255337069381L;

    private String contentType;
    private File upload;
    private String fileName;
    private String caption;

    // since we are using <s:file name="upload" .../> the file name will be
    // obtained through getter/setter of <file-tag-name>FileName
    public String getUploadFileName() {
        return fileName;
    }
    public void setUploadFileName(String fileName) {
        this.fileName = fileName;
    }


    // since we are using <s:file name="upload" ... /> the content type will be
    // obtained through getter/setter of <file-tag-name>ContentType
    public String getUploadContentType() {
        return contentType;
    }
    public void setUploadContentType(String contentType) {
        this.contentType = contentType;
    }


    // since we are using <s:file name="upload" ... /> the File itself will be
    // obtained through getter/setter of <file-tag-name>
    public File getUpload() {
        return upload;
    }
    public void setUpload(File upload) {
        this.upload = upload;
    }


    public String getCaption() {
        return caption;
    }
    public void setCaption(String caption) {
        this.caption = caption;
    }

    public String input() throws Exception {
        return SUCCESS;
    }

    public String upload() throws Exception  {
        return SUCCESS;
    }

}

upload.jsp如下：

<%@ page 
	language="java" 
	contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
    <title>Showcase</title>
</head>

<body>
    <h1>Fileupload sample</h1>

	<s:actionerror />
	<s:fielderror />
    <s:form action="doUpload" method="POST" enctype="multipart/form-data">
    	<s:fielderror></s:fielderror>
        <s:file name="upload" label="File"/>
        <s:textfield name="caption" label="Caption"/>
        <s:submit />
    </s:form>
</body>
</html>

upload-success.jsp如下：

<%@ page 
	language="java" 
	contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
    <title>Showcase</title>
</head>

<body>
<h1>Fileupload sample</h1>


    <ul>
        <li>ContentType: <s:property value="uploadContentType" /></li>
        <li>FileName: <s:property value="uploadFileName" /></li>
        <li>File: <s:property value="upload" /></li>
        <li>Caption:<s:property value="caption" /></li>
    </ul>


</body>
</html>

这样单一的上传文件就好了。
下面是多文件上传的代码，MultipleFileUploadUsingListAction.java代码如下：

package com.struts.fileupload;
import java.io.File;
import java.util.ArrayList;
import java.util.List;

import com.opensymphony.xwork2.ActionSupport;

/**
 * Showcase action - multiple file upload using List
 * @version $Date: 2006-11-23 12:31:52 -0500 (Thu, 23 Nov 2006) $ $Id: MultipleFileUploadUsingListAction.java 478625 2006-11-23 17:31:52Z wsmoak $
 */
public class MultipleFileUploadUsingListAction extends ActionSupport {

    private List<File> uploads = new ArrayList<File>();
    private List<String> uploadFileNames = new ArrayList<String>();
    private List<String> uploadContentTypes = new ArrayList<String>();


    public List<File> getUpload() {
        return this.uploads;
    }
    public void setUpload(List<File> uploads) {
        this.uploads = uploads;
    }

    public List<String> getUploadFileName() {
        return this.uploadFileNames;
    }
    public void setUploadFileName(List<String> uploadFileNames) {
        this.uploadFileNames = uploadFileNames;
    }

    public List<String> getUploadContentType() {
        return this.uploadContentTypes;
    }
    public void setUploadContentType(List<String> contentTypes) {
        this.uploadContentTypes = contentTypes;
    }




    public String upload() throws Exception {

        System.out.println("\n\n upload1");
        System.out.println("files:");
        for (File u: uploads) {
            System.out.println("*** "+u+"\t"+u.length());
        }
        System.out.println("filenames:");
        for (String n: uploadFileNames) {
            System.out.println("*** "+n);
        }
        System.out.println("content types:");
        for (String c: uploadContentTypes) {
            System.out.println("*** "+c);
        }
        System.out.println("\n\n");
        return SUCCESS;
    }


}

multipleFileUploadUsingList.jsp如下：

<%@ page 
	language="java" 
	contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@ taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>Showcase - fileupload - multiple fileupload using List</title>
</head>
<body>

<s:form action="doMultipleUploadUsingList" method="POST" enctype="multipart/form-data">
	<s:file label="File (1)" name="upload" />
	<s:file label="File (2)" name="upload" />
	<s:file label="FIle (3)" name="upload" />
	<s:submit />
</s:form>

</body>
</html>

multipleFileUploadUsingList-success.jsp如下：

<%@taglib prefix="s" uri="/struts-tags" %>
<html>
<head>
<title>Insert title here</title>
</head>
<body>

<table border="1">
<s:iterator value="upload" status="stat">
<tr>
	<td>File <s:property value="%{#stat.index}" /></td>
	<td><s:property value="%{upload[#stat.index]}" /></td>
</tr>
</s:iterator>
</table>


<table border="1">
<s:iterator value="uploadFileName" status="stat">
<tr>
	<td>File Name <s:property value="%{#stat.index}" /></td>
	<td><s:property value="%{uploadFileName[#stat.index]}" /></td>
</tr>	
</s:iterator>
</table>

<table border="1">
<s:iterator value="uploadContentType" status="stat">
<tr>
	<td>Content Type <s:property value="%{#stat.index}" /></td>
	<td><s:property value="%{uploadContentType[#stat.index]}" /></td>
</tr>
</s:iterator>
</table>

</body>
</html>

这样就可以了。
现在还存在着一些问题，不知道怎么去限制文件上传类型，确定上传目录，限制上传的大小这个还不知道怎么设置，在相应的action里面做如下配置就是不行，也不知道为啥。

<interceptor-ref name="fileUpload">
	              <!-- 配置允许上传的文件类型，多个用","分隔 -->
	              <param name="allowedTypes">
	    　　　　　　image/bmp,image/png,image/gif,image/jpeg,image/jpg 
	,image/x-png, image/pjpeg
	              </param>
	              <!-- 配置允许上传的文件大小，单位字节 -->
	              <param name="maximumSize">1024000000</param>
	           </interceptor-ref>

不知道是不是和tomcat6有关。

评论

2 楼 dd350356750 2008-09-22  

下载了学习下。放入 了。

“上传的功能可以使用，下载的那个功能还缺少images文件下的两个文件 ”

这句话没听懂。

1 楼 vtegymtd888 2008-08-02