吴裕雄--天生自然轻量级JAVA EE企业应用开发Struts2Sping4Hibernate整合开发学习笔记：struts2拦截器实现文件过滤

<?xml version="1.0" encoding="GBK"?>
<project name="struts" basedir="." default="">
    <property name="dist" value="classes"/>
    <property name="src" value="src"/>
    
    <path id="classpath">
        <fileset dir="lib">
            <include name="*.jar"/>
        </fileset>
        <pathelement path="${dist}"/>
    </path>

    <target name="compile" description="Compile all source code">
        <delete dir="${dist}"/>
        <mkdir dir="${dist}"/>
        <copy todir="${dist}">
            <fileset dir="${src}">
                <exclude name="**/*.java"/>
            </fileset>        
        </copy>
        <javac destdir="classes" debug="true" includeantruntime="yes"
            deprecation="false" optimize="false" failonerror="true">
            <src path="${src}"/>
            <classpath refid="classpath"/>
        </javac>
    </target>

</project>

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

<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
    http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1">
    <!-- 定义Struts 2的核心Filter -->
    <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <!-- 让Struts 2的核心Filter拦截所有请求 -->
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

<%--
网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
author  yeeku.H.lee kongyeeku@163.com
version  1.0
Copyright (C), 2001-2016, yeeku.H.Lee
This program is protected by copyright laws.
Program Name:
Date: 
--%>

<%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>
<%@taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>上传成功</title>
</head>
<body>
    上传成功!<br/>
    文件标题:<s:property value=" + title"/><br/>
    文件为：<img src="<s:property value="'uploadFiles/' 
        + uploadFileName"/>"/><br/>
</body>
</html>

<%--
网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
author  yeeku.H.lee kongyeeku@163.com
version  1.0
Copyright (C), 2001-2016, yeeku.H.Lee
This program is protected by copyright laws.
Program Name:
Date: 
--%>

<%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %>
<%@taglib prefix="s" uri="/struts-tags"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>利用拦截器实现文件过滤</title>
    <s:head/>
</head>
<body>
<s:form action="upload"
    enctype="multipart/form-data">
    <s:textfield name="title" label="文件标题"/>
    <s:file name="upload" label="选择文件"/>
    <s:submit value="上传"/>
</s:form>
</body>
</html>

#改变文件类型不允许的提示信息
struts.messages.error.content.type.not.allowed=您上传的文件类型只能是图片文件！
请重新选择！
#改变上传文件太大的提示信息
struts.messages.error.file.too.large=您要上传的文件太大，请重新选择！

#\u6539\u53d8\u6587\u4ef6\u7c7b\u578b\u4e0d\u5141\u8bb8\u7684\u63d0\u793a\u4fe1\u606f
struts.messages.error.content.type.not.allowed=\u60a8\u4e0a\u4f20\u7684\u6587\u4ef6\u7c7b\u578b\u53ea\u80fd\u662f\u56fe\u7247\u6587\u4ef6\uff01
\u8bf7\u91cd\u65b0\u9009\u62e9\uff01
#\u6539\u53d8\u4e0a\u4f20\u6587\u4ef6\u592a\u5927\u7684\u63d0\u793a\u4fe1\u606f
struts.messages.error.file.too.large=\u60a8\u8981\u4e0a\u4f20\u7684\u6587\u4ef6\u592a\u5927\uff0c\u8bf7\u91cd\u65b0\u9009\u62e9\uff01

<?xml version="1.0" encoding="GBK"?>
<!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.custom.i18n.resources" value="mess"/>
    <!-- 设置该应用使用的字符集 -->
    <constant name="struts.i18n.encoding" value="GBK"/>
    <package name="lee" extends="struts-default">
        <!-- 配置处理文件上传的Action -->
        <action name="upload" class="org.crazyit.app.action.UploadAction">
            <!-- 配置fileUpload的拦截器 -->
            <interceptor-ref name="fileUpload">
                <!-- 配置允许上传的文件类型 -->
                <param name="allowedTypes">image/png
                    ,image/gif,image/jpeg</param>
                <!-- 配置允许上传的文件大小 -->
                <param name="maximumSize">2000</param> 
            </interceptor-ref> 
            <!-- 配置系统默认的拦截器 -->
            <interceptor-ref name="defaultStack"/>
            <!-- 动态设置Action的属性值 -->
            <param name="savePath">/uploadFiles</param>
            <!-- 配置Struts 2默认的视图页面 -->
            <result>/WEB-INF/content/succ.jsp</result>
            <result name="input">/WEB-INF/content/uploadForm.jsp</result>
        </action>
        <action name="*">
            <result>/WEB-INF/content/{1}.jsp</result>    
        </action>
    </package>
</struts>

package org.crazyit.app.action;

import com.opensymphony.xwork2.Action;
import com.opensymphony.xwork2.ActionSupport;
import org.apache.struts2.ServletActionContext;

import java.io.File;
import java.io.*;

/**
 * Description:
 * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a>
 * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee kongyeeku@163.com
 * @version  1.0
 */

public class UploadAction extends ActionSupport
{
    //封装文件标题请求参数的属性
    private String title;
    //封装上传文件域的属性
    private File upload;
    //封装上传文件类型的属性
    private String uploadContentType;
    //封装上传文件名的属性
    private String uploadFileName;
    //直接在struts.xml文件中配置的属性
    private String savePath;
    //接受struts.xml文件配置值的方法
    public void setSavePath(String value)
    {
        this.savePath = value;
    }
    //返回上传文件的保存位置
    private String getSavePath() throws Exception
    {
        return ServletActionContext.getServletContext()
            .getRealPath(savePath);
    }

    //文件标题的setter和getter方法
    public void setTitle(String title)
    {
        this.title = title;
    }
    public String getTitle()
    {
        return (this.title);
    }

    //上传文件对应文件内容的setter和getter方法
    public void setUpload(File upload)
    {
        this.upload = upload;
    }
    public File getUpload()
    {
        return (this.upload);
    }

    //上传文件的文件类型的setter和getter方法
    public void setUploadContentType(String uploadContentType)
    {
        this.uploadContentType = uploadContentType;
    }
    public String getUploadContentType()
    {
        return (this.uploadContentType);
    }

    //上传文件的文件名的setter和getter方法
    public void setUploadFileName(String uploadFileName)
    {
        this.uploadFileName = uploadFileName;
    }
    public String getUploadFileName()
    {
        return (this.uploadFileName);
    }

    @Override
    public String execute() throws Exception
    {
        //以服务器的文件保存地址和原文件名建立上传文件输出流
        FileOutputStream fos = new FileOutputStream(getSavePath()
            + "\\" + getUploadFileName());
        FileInputStream fis = new FileInputStream(getUpload());
        byte[] buffer = new byte[1024];
        int len = 0;
        while ((len = fis.read(buffer)) > 0)
        {
            fos.write(buffer , 0 , len);
        }
        fos.close();
        return SUCCESS;
    }
}

来源：https://www.cnblogs.com/tszr/p/12366797.html

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