java：struts框架3（自定义拦截器，token令牌，文件上传和下载（单/多））

时间：2023-03-09 05:34:40
java：struts框架3（自定义拦截器，token令牌，文件上传和下载（单/多））

1.自定义拦截器：

java：struts框架3（自定义拦截器，token令牌，文件上传和下载（单/多））

　　java：struts框架3（自定义拦截器，token令牌，文件上传和下载（单/多））

　　struts.xml:

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

<!DOCTYPE struts PUBLIC

    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"

    "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

    <package name="inteceptor" extends="struts-default">

        <interceptors>

            <!-- 配置自定义拦截器 -->

            <interceptor name="myInter" class="cn.zzsxt.interceptor.MyInterceptor"></interceptor>

            <interceptor name="permission" class="cn.zzsxt.interceptor.PermissionInterceptor"></interceptor>

            <!-- 自定义拦截器栈 -->

            <interceptor-stack name="myStack">

                <!-- 引入自定义拦截器 -->

                <interceptor-ref name="myInter"></interceptor-ref>

                <!-- 引入timer拦截器 -->

                <interceptor-ref name="timer"></interceptor-ref>

                <!-- 引入默认拦截器栈 -->

                <interceptor-ref name="defaultStack"></interceptor-ref>

            </interceptor-stack>

            <!-- 自定义访问权限的拦截器栈 -->

            <interceptor-stack name="permissionStack">

                <interceptor-ref name="permission"></interceptor-ref>

                <interceptor-ref name="defaultStack"></interceptor-ref>

            </interceptor-stack>

        </interceptors>

        <action name="timerAction" class="cn.zzsxt.action.TimerAction">

            <result name="success">/success.jsp</result>

            <interceptor-ref name="myStack"></interceptor-ref>

            <interceptor-ref name="permissionStack"></interceptor-ref>

        </action>

        <action name="userAction" class="cn.zzsxt.action.UserAction">

            <result name="success" type="redirectAction">homeAction</result>

            <result name="login">/login.jsp</result>

            <interceptor-ref name="permissionStack"></interceptor-ref>

        </action>

        <action name="homeAction" class="cn.zzsxt.action.HomeAction">

            <result name="success">/list.jsp</result>

            <result name="login" type="redirect">/login.jsp</result>

            <!-- 引入拦截器栈 -->

            <interceptor-ref name="permissionStack"></interceptor-ref>

        </action>

    </package>

</struts>

2.token令牌:

　　struts.xml:

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

<!DOCTYPE struts PUBLIC

    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"

    "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

    <!-- 上传文件最大大小,默认为2097152字节(2M) -->

    <constant name="struts.multipart.maxSize" value="209715200"></constant>

    <!-- 设置编码集 request.setCharacterEncoding("UTF-8")-->

    <constant name="struts.i18n.encoding" value="UTF-8"></constant>

    <package name="tokenDemo" extends="struts-default">

        <action name="user-*" class="cn.zzsxt.action.UserAction" method="{1}">

            <result name="success">/index.jsp</result>

            <!-- token验证失败后跳转的结果视图 -->

            <result name="invalid.token">/error.jsp</result>

            <!-- 引入token拦截器 -->

            <interceptor-ref name="token"></interceptor-ref>

            <!-- 引入默认拦截器栈 -->

            <interceptor-ref name="defaultStack"></interceptor-ref>

        </action>

    </package>

</struts>

　　add.jsp:

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

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

<%

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 'index.jsp' starting page</title>

  </head>

  <body>

      <form action="user-doAdd.action" method="post">

          <!-- token令牌 -->

          <s:token></s:token>

          用户编号:<input type="text" name="user.id"><br>

          用户名称:<input type="text" name="user.userName"><br>

          密码:<input type="text" name="user.password"><br>

          <input type="submit" value="新增"/>

      </form>

  </body>

</html>

　　action:

package cn.zzsxt.action;

import com.opensymphony.xwork2.ActionSupport;

import cn.zzsxt.entity.User;

public class UserAction extends ActionSupport{

    private User user;

    public User getUser() {

        return user;

    }

    public void setUser(User user) {

        this.user = user;

    }

    public String doAdd() throws Exception {

        System.out.println("执行了用户新增,新增了:"+user);

        return this.SUCCESS;

    }

}

　　

3.文件上传和下载（单/多）：

　　struts.xml:

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

<!DOCTYPE struts PUBLIC

    "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"

    "http://struts.apache.org/dtds/struts-2.3.dtd">

<struts>

    <!-- 上传文件最大大小,默认为2097152字节(2M) -->

    <constant name="struts.multipart.maxSize" value="209715200"></constant>

    <!-- 设置编码集 request.setCharacterEncoding("UTF-8")-->

    <constant name="struts.i18n.encoding" value="UTF-8"></constant>

    <package name="upload" extends="struts-default">

        <action name="singleUpload" class="cn.zzsxt.action.SingleUploadAction">

            <!-- result中name属性缺省(默认)为success -->

            <result>/success.jsp</result>

        </action>

        <action name="mutilUpload" class="cn.zzsxt.action.MutilUploadAction">

            <!-- result中name属性缺省(默认)为success -->

            <result>/success.jsp</result>

        </action>

        <action name="download" class="cn.zzsxt.action.DownloadAction">

            <result type="stream">

                <!-- inputName="输入流的名称"，回掉action中getInputStream()方法获取输入流 -->

                <param name="inputName">inputStream</param>

                <!--contentType="文件类型" application/octet-stream代表对下载类型不限制  -->

                <param name="contentType">application/octet-stream</param>

                <!-- attachment:以附件方式保存 filename="保存的文件名称" ${fileName}获取action中fileName属性的值 -->

                <param name="contentDisposition">attachment;filename=${fileName}</param>

            </result>

        </action>

    </package>

</struts>

　　SingleUploadAction:

package cn.zzsxt.action;

import java.io.File;

import javax.servlet.ServletContext;

import org.apache.commons.io.FileUtils;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class SingleUploadAction extends ActionSupport{

    private File upload;//文件

    private String uploadFileName;//文件名称:属性名+FileName

    private String uploadContentType;//文件类型:属性名+ContentType

    public File getUpload() {

        return upload;

    }

    public void setUpload(File upload) {

        this.upload = upload;

    }

    public String getUploadFileName() {

        return uploadFileName;

    }

    public void setUploadFileName(String uploadFileName) {

        this.uploadFileName = uploadFileName;

    }

    public String getUploadContentType() {

        return uploadContentType;

    }

    public void setUploadContentType(String uploadContentType) {

        this.uploadContentType = uploadContentType;

    }

    /**

     * 执行文件上次

     */

    @Override

    public String execute() throws Exception {

        System.out.println("文件名称:"+uploadFileName);

        System.out.println("文件类型:"+uploadContentType);

        ServletContext servletContext = ServletActionContext.getServletContext();

        String realPath = servletContext.getRealPath("/upload");//获取文件上次的真实目录

        File uploadDir = new File(realPath);

        if(!uploadDir.exists()){

            uploadDir.mkdirs();//创建目录

        }

        //上传

        FileUtils.copyFile(upload, new File(uploadDir,uploadFileName));

        return this.SUCCESS;

    }

}

　　SingleUpload.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>单文件上传</title>

  </head>

  <body>

       <form action="singleUpload.action" method="post" enctype="multipart/form-data">

           文件:<input type="file" name="upload"></br>

           <input type="submit" value="上传"/>

       </form>

  </body>

</html>

　　MutilUploadAction:

package cn.zzsxt.action;

import java.io.File;

import javax.servlet.ServletContext;

import org.apache.commons.io.FileUtils;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class MutilUploadAction extends ActionSupport{

    private File[] upload;//文件

    private String[] uploadFileName;//文件名称:属性名+FileName

    private String[] uploadContentType;//文件类型:属性名+ContentType

    public File[] getUpload() {

        return upload;

    }

    public void setUpload(File[] upload) {

        this.upload = upload;

    }

    public String[] getUploadFileName() {

        return uploadFileName;

    }

    public void setUploadFileName(String[] uploadFileName) {

        this.uploadFileName = uploadFileName;

    }

    public String[] getUploadContentType() {

        return uploadContentType;

    }

    public void setUploadContentType(String[] uploadContentType) {

        this.uploadContentType = uploadContentType;

    }

    /**

     * 执行文件上次

     */

    @Override

    public String execute() throws Exception {

        System.out.println("文件名称:"+uploadFileName);

        System.out.println("文件类型:"+uploadContentType);

        ServletContext servletContext = ServletActionContext.getServletContext();

        String realPath = servletContext.getRealPath("/upload");//获取文件上次的真实目录

        File uploadDir = new File(realPath);

        if(!uploadDir.exists()){

            uploadDir.mkdirs();//创建目录

        }

        //遍历待上传的文件

        for(int i=0;i<upload.length;i++){

            //上传

            FileUtils.copyFile(upload[i], new File(uploadDir,uploadFileName[i]));

        }

        return this.SUCCESS;

    }

}

　　MutilUpload.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>单文件上传</title>

  </head>

  <body>

       <form action="mutilUpload.action" method="post" enctype="multipart/form-data">

           文件1:<input type="file" name="upload"></br>

           文件2:<input type="file" name="upload"></br>

           文件3:<input type="file" name="upload"></br>

           <input type="submit" value="上传"/>

       </form>

  </body>

</html>

　　DownloadAction:

package cn.zzsxt.action;

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStream;

import javax.servlet.ServletContext;

import org.apache.struts2.ServletActionContext;

import com.opensymphony.xwork2.ActionSupport;

public class DownloadAction extends ActionSupport{

    private String fileName;//接受要下载的文件名称

    private InputStream inputStream;

    public String getFileName() {

        return fileName;

    }

    public void setFileName(String fileName) {

        this.fileName = fileName;

    }

    public InputStream getInputStream() {

        return inputStream;

    }

    public void setInputStream(InputStream inputStream) {

        this.inputStream = inputStream;

    }

    /**

     * 文件下载

     */

    @Override

    public String execute() throws Exception {

        //获取服务器端保存文件的目录

        ServletContext servletContext = ServletActionContext.getServletContext();

        String realPath = servletContext.getRealPath("/upload");//获取文件上传的真实目录

        File file = new File(realPath,fileName);

        inputStream = new FileInputStream(file); //将文件转为输入流

        //解决下载时中文名称乱码问题

        String str = new String(fileName.getBytes("UTF-8"),"iso-8859-1");

        fileName = str;

        return this.SUCCESS;

    }

}

　　Download.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>文件下载</title>

  </head>

  <body>

      <a href="download.action?fileName=1.txt">1.txt</a><br>

      <a href="download.action?fileName=mystruts.png">mystruts.png</a><br>

      <a href="download.action?fileName=Log4J详解.docx">Log4J详解.docx</a><br>

  </body>

</html>