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：

　　

　　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>
【推广】 免费学中医，健康全家人
原文地址：https://www.cnblogs.com/kuangzhisen/p/7354748.html