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struts2.0简单页面（不带拦截器和带拦截器案例）

做一个不带拦截器的struts 登录验证不带拦截器，用户能直接访问action页面访问到数据，起不到登录验证的作用

1.使用c3p0 连接 mysql ,数据库字段与 java 字段一致

c3p0默认加载 c3p0-config.xml 配置文件

<c3p0-config>
<default-config>
<property name="jdbcUrl">jdbc:mysql:///hib_demo
</property>
<property name="driverClass">com.mysql.jdbc.Driver</property>
<property name="user">root</property>
<property name="password">root</property>
<property name="initialPoolSize">3</property>
<property name="maxPoolSize">6</property>
<property name="maxIdleTime">1000</property>
</default-config>


<named-config name="oracle_config">
<property name="jdbcUrl">jdbc:mysql:///hib_demo</property>
<property name="driverClass">com.mysql.jdbc.Driver</property>
<property name="user">root</property>
<property name="password">root</property>
<property name="initialPoolSize">3</property>
<property name="maxPoolSize">6</property>
<property name="maxIdleTime">1000</property>
</named-config>


</c3p0-config>

jdbcutils.java cn.itcast.utils包

package cn.itcast.utils;
import javax.sql.DataSource;

import org.apache.commons.dbutils.QueryRunner;

import com.mchange.v2.c3p0.ComboPooledDataSource;


public class jdbcutils {
private static DataSource datasource;
static{
    datasource =new ComboPooledDataSource();
    
}
public static DataSource getdatasource(){
    return datasource;
}
public static QueryRunner getquerrrunner(){
    return new     QueryRunner(datasource);
}
}

=====================================================================

2.项目中加载的jar包：

struts-jar( commons-fileupload-1.2.2;commons-io-2.0.1;commons-lang3-3.1;freemarker-2.3.19;javassist-3.11.0.GA;ognl-3.0.5;struts2-core-2.3.4.1;xwork-core-2.3.4.1)

c3p0-0.9.1.2;commons-dbutils-1.6;mysql-connector-java5.1.12

3. login.jsp 登录页面

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

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>My JSP 'index.jsp' starting page</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
  </head>
  
  <body>
       <form method="post" action="${pageContext.request.contextPath }/user_login.action">
           用户名：<input type="text" name="admin.username"><br/>                        //存放值    
           密码：<input type="text" name="admin.pwd"><br/>
           <input type="submit" value="登陆"><br/>
       </form>
  </body>
</html>

list.jsp 显示页面位置放置于 webrootweb-inf

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

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <title>list</title>
    <meta http-equiv="pragma" content="no-cache">
    <meta http-equiv="cache-control" content="no-cache">
    <meta http-equiv="expires" content="0">    
  </head>
  
  <body>
      <h1>欢迎你，${userinfo.username }</h1>
      <table align="center" border="1">
          <tr>
              <td>序号</td>
              <td>编号</td>
              <td>用户名</td>
              <td>密码</td>
          </tr>
      
          <%@taglib uri="/struts-tags" prefix="s" %>
          <s:iterator var="admin" value="#request.listadmin" status="st">
              <tr>
                  <td>
                      <s:property value="#st.count"/>                             //ognl表达式取值
                  </td>
                  <td>
                      <s:property value="#admin.id"/>
                  </td>
                  <td>
                      <s:property value="#admin.username"/>
                  </td>
                  <td>
                      <s:property value="#admin.pwd"/>
                  </td>
              </tr>
          </s:iterator>
          
      </table>
  </body>
</html>

web.xml struts拦截所有请求

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
    xmlns="http://java.sun.com/xml/ns/javaee" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
    http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <display-name></display-name>    
  
  
        <filter>
        <filter-name>struts2</filter-name>
        <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>struts2</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

4. admin.java 跟数据库字段一致

package cn.itcast.entity;

public class admin {
    private int id;
    private String username;
    private String pwd;
    public int getId() {
        return id;
    }
    public void setId(int id) {
        this.id = id;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPwd() {
        return pwd;
    }
    public void setPwd(String pwd) {
        this.pwd = pwd;
    }    
}

admindao.java

package cn.itcast.dao;

import java.sql.SQLException;
import java.util.List;

import org.apache.commons.dbutils.handlers.BeanHandler;
import org.apache.commons.dbutils.handlers.BeanListHandler;
import org.junit.Test;

import cn.itcast.entity.admin;
import cn.itcast.utils.jdbcutils;

public class admindao {
    
    
    
    
public admin  login(admin admin){
    String sql="select * from admin where username=? and pwd=?";

    try {
        return  jdbcutils.getquerrrunner().query(sql,new BeanHandler<admin>(admin.class),admin.getUsername(),admin.getPwd());
        
        
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        throw new RuntimeException(e);
    }
    
}
public List<admin> getall(){
    String sql="select * from  admin";
    try {
        return jdbcutils.getquerrrunner().query(sql, new BeanListHandler<admin>(admin.class));
    } catch (SQLException e) {
        // TODO Auto-generated catch block
        throw new RuntimeException(e);
    }
}
}

adminservice.java

package cn.itcast.service;

import java.util.List;

import cn.itcast.dao.admindao;
import cn.itcast.entity.*;
public class adminservice {
private admindao admindao = new admindao();
public admin login(admin admin){
    return admindao.login(admin);
}
public List<admin> getall(){
    return admindao.getall();
}
}

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="user" extends="struts-default">

        <global-results>
            <result name="error">/error.jsp</result>
        </global-results>


        <action name="user_*"  class="cn.itcast.action.useraction" method="{1}">
    
            <!-- 1. 登陆失败 -->
            <result name="input">/login.jsp</result>
            
            <!-- 2. 登陆成功 -->
            <result name="loginSuccess" type="redirectAction">user_list</result>               //设置 跳转  而不是简单的页面跳转，需要传值！
            
            <!-- 3. 列表展示 -->
            <result name="list">/WEB-INF/list.jsp</result>
        </action>
    </package>
</struts>

useraction.java

package cn.itcast.action;

import java.util.List;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import  cn.itcast.entity.*;
import cn.itcast.service.*;

public class useraction extends ActionSupport {
private admin  admin;

public admin getAdmin() {              //注意 如果该处写  getadmin()  setadmin() ;struts是找不到admin数据的；受到struts取值影响，必须使用eclipse习惯用法。
    return admin;
}

public void setAdmin(admin admin) {
    this.admin = admin;
}

private adminservice adminservice= new adminservice();




public String login(){
    try {
        admin userinfo= adminservice.login(admin);
        if(userinfo==null){
            return "input";
        }
        ActionContext.getContext().getSession().put("userinfo", userinfo);
        return "loginSuccess";
    } catch (Exception e) {
        // TODO Auto-generated catch block
        return ERROR;
    }
}

public String list(){
    try {
        List<admin> list=adminservice.getall();
        ActionContext.getContext().getContextMap().put("listadmin", list);
        return "list";
    } catch (Exception e) {
        // TODO Auto-generated catch block
        return ERROR;
        
    }
}
}

设置拦截器：

UserCheckInterceptor.java


package cn.itcast.interceptor;

import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.ActionProxy;
import com.opensymphony.xwork2.interceptor.AbstractInterceptor;

public class UserCheckInterceptor extends AbstractInterceptor{

    /**
     * 拦截器业务处理方法
     */
    public String intercept(ActionInvocation invocation) throws Exception {
        // 拿到当前执行的方法名：判断，只有当前方法名不是login,就进行验证
        
        // 获取ActionContext对象
        ActionContext ac = invocation.getInvocationContext();
        
        // 获取action的代理对象
         ActionProxy proxy = invocation.getProxy();
         // 获取当前执行的方法名
         String methodName = proxy.getMethod();
         // 判断
         if (!"login".equals(methodName)) {
             // 先获取当前登陆的用户
             Object obj = ac.getSession().get("userInfo");
             if (obj == null) {
                 // 没有登陆
                 return "input";
             } else {
                 // 当前用户有登陆
                 return invocation.invoke();
             }
         } else {
             // 说明当前用户正在登陆
             return invocation.invoke();
         }
    }

}

à 配置拦截器

<?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">

<interceptor-stack name="myStack">

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

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

</interceptor-stack>

</interceptors>

<!-- 【执行拦截器:第一种写法：当前包下所有的acntion都执行myStack栈】

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

-->

<global-results>

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

</global-results>

<!--第二种写法：只是在这一个Action中执行myStack栈

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

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

-->

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

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

</action>

</package>

</struts>

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原文地址：https://www.cnblogs.com/yimian/p/7802354.html

struts2.0简单页面 （不带拦截器和带拦截器案例）

struts2.0简单页面（不带拦截器和带拦截器案例）