夜光带你走进 Java 成神之路--Spring&SSH（四十八）擅长的领域

夜光序言：

 

 放空的心，那是最好的礼物，独走的路，那是最美的风景。

 

 

 

正文：

 

                                             以道御术 / 以术识道

 

我们看一下用ssh来搭建一个登录~~

jdbc:mysql://localhost:3306/testdb?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT

如果出现这个黄条，我们需要配置一下

点击

我们选择下面这个

package com.hy.action;

import com.hy.entity.User;
import com.hy.service.UserService;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionSupport;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Controller;

import javax.annotation.Resource;
import java.util.Map;

//夜光：添加如下注解
@Controller("userAction")
@Scope("prototype")
public class UserAction extends ActionSupport {
    @Resource
    private UserService userService;

    private User user;

    public User getUser() {
        return user;
    }

    public void setUser(User user) {
        this.user = user;
    }

    public String login() {
        if(userService.login(user)) {
            Map session = ActionContext.getContext().getSession();
            session.put("user", user);
            return SUCCESS;
        } else {
            return ERROR;
        }
    }

}

package com.hy.dao.impl;

import com.hy.dao.UserDao;
import com.hy.entity.User;
import org.hibernate.Query;
import org.hibernate.SessionFactory;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import javax.annotation.Resource;
import java.util.Iterator;
import java.util.List;

@Transactional(rollbackFor = Exception.class)
//出现Exception异常回滚
@Repository("userDao") //进行注入
public class UserDaoImpl implements UserDao {
    @Resource(name="sessionFactory")
    private SessionFactory sessionFactory;

    @Override
    public void add(User user) {
        sessionFactory.getCurrentSession().save(user);
    }

    @Override
    public boolean login(User user) {
        Iterator<User> it;
        String hsql="FROM User u where u.username=? and u.password=?";
        System.out.println(hsql);
        Query query = sessionFactory.getCurrentSession().createQuery(hsql);
        query.setString(0, user.getUsername());
        query.setString(1, user.getPassword());
        System.out.println(user.getUsername());
        it=query.iterate();
        if(it.hasNext()) {
            System.out.println("true");
            return true;
        } else {
            System.out.println("false");
            return false;
        }
    }

    @Override
    public List getUser() {
        return sessionFactory.getCurrentSession().createQuery("FROM User").list();
    }

    @Override
    public User getUser(int id) {
        return (User)sessionFactory.getCurrentSession().get(User.class, id);
    }

    @Override
    public void update(User user) {
        sessionFactory.getCurrentSession().update(user);
    }

    @Override
    public void delete(int id) {
        sessionFactory.getCurrentSession().delete(
                sessionFactory.getCurrentSession().get(User.class, id)
        );
    }
}

package com.hy.dao;

import com.hy.entity.User;

import java.util.List;

public interface UserDao {
    /**
     * 添加并保存用户
     * @param user
     */
    public void add(User user);

    /**
     * 进行登录
     */
    public boolean login(User user);


    /**
     * 获取用户列表
     */
    public List getUser();

    /**
     * 根据用户Id获取用户信息
     * @param id
     * @return
     */
    public User getUser(int id);

    /**
     * 更新用户信息
     * @param user
     */
    public void update(User user);


    /**
     * 根据用户id删除用户信息
     * @param id
     */
    public void delete(int id);

}

package com.hy.service.impl;

import com.hy.dao.UserDao;
import com.hy.entity.User;
import com.hy.service.UserService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

//注入服务
@Service("userService")
public class UserServiceImpl implements UserService {
    //自动注入userDao，也可以使用@Autowired
    @Resource
    private UserDao userDao;


    @Override
    public boolean addUser(User user) {
        this.userDao.add(user);
        return true;
    }

    @Override
    public boolean login(User user) {
        return this.userDao.login(user);
    }

    @Override
    public List getAllUser() {
        return this.userDao.getUser();
    }

    @Override
    public User getUserById(int id) {
        return this.userDao.getUser(id);
    }

    @Override
    public boolean updateUser(User user) {
        this.userDao.update(user);
        return true;

    }

    @Override
    public boolean deleteUser(int id) {
        this.userDao.delete(id);
        return true;
    }
}

package com.hy.service;

import com.hy.entity.User;

import java.util.List;

public interface UserService {
    public boolean addUser(User user);

    public boolean login(User user);

    public List getAllUser();

    public User getUserById(int id);

    public boolean updateUser(User user);

    public boolean deleteUser(int id);
}

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
    <!-- 夜光：这里，我们想一想：classpath 是指什么呢 -->
    <context:property-placeholder location="classpath:db.properties" />

    <!-- 使用annotation -->
    <context:annotation-config/>
    <!-- 使用annotation自动注册bean,并检查@Controlhyler, @Service, @Repository注解已被注入 -->
    <context:component-scan base-package="com.hy.action"/>
    <context:component-scan base-package="com.hy.service"/>
    <context:component-scan base-package="com.hy.dao" />

    <!-- data connection setting -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <property name="driverClass" value="${database.driverClassName}"></property>
        <property name="jdbcUrl" value="${database.url}"></property>
        <property name="user" value="${database.username}"></property>
        <property name="password" value="${database.password}"></property>
        <!-- 设置数据库连接池的最大连接数 -->
        <property name="maxPoolSize">
            <value>50</value>
        </property>
        <!-- 设置数据库连接池的最小连接数 -->
        <property name="minPoolSize">
            <value>5</value>
        </property>
        <!-- 设置数据库连接池的初始化连接数 -->
        <property name="initialPoolSize">
            <value>5</value>
        </property>
        <!-- 设置数据库连接池的连接最大空闲时间 -->
        <property name="maxIdleTime">
            <value>20</value>
        </property>
        <!-- c3p0缓存Statement的数量数 -->
        <property name="maxStatements">
            <value>50</value>
        </property>
        <!-- 当连接池里面的连接用完的时候,C3P0一下获取新的连接数 -->
        <property name="acquireIncrement">
            <value>20</value>
        </property>

    </bean>

    <!-- hibernate 管理-->

    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
        <!-- 引用上面设置的数据源 -->
        <property name="dataSource">
            <ref bean="dataSource" />
        </property>

        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.autoReconnect">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.format_sql">true</prop>
                <!--夜光： 解决session关闭问题 -->
                <prop key="hibernate.enable_lazy_load_no_trans">true</prop>
                <prop key="current_session_context_class">thread</prop>

                <prop key="hibernate.cache.provider_class">org.hibernate.cache.HashtableCacheProvider</prop>
                <prop key="hibernate.max_fetch_depth">3</prop>
                <prop key="hibernate.connection.url"><![CDATA[jdbc:mysql://localhost:3306/testdb?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT]]></prop>
                <prop key="hibernate.connection.driver_class">com.mysql.cj.jdbc.Driver</prop>
            </props>

        </property>

        <!-- 包扫描的方式加载注解类 -->
        <property name="packagesToScan">
            <list>
                <value>com.hy.entity</value>
            </list>
        </property>
    </bean>

    <!--夜光： 用注解来实现事物管理 -->
    <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>
    <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/>
</beans>

database.database=mysql
database.driverClassName=com.mysql.jdbc.Driver
database.username=root
database.password=1111
database.show_sql=true
database.url=jdbc:mysql://localhost:3306/TESTDB?useUnicode=true&characterEncoding=UTF-8&serverTimezone=GMT

<?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>

    <constant name="struts.devMode" value="false"/>
    <constant name="struts.objectFactory" value="spring" />

    <package name="user" namespace="/" extends="struts-default">

        <action name="user_*" class="userAction" method="{1}">
            <result name="success">/success.jsp</result>
            <result name="error">/error.jsp</result>
        </action>

    </package>
</struts>

<?xml version="1.0" encoding="UTF-8"?>
<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">
  <!-- struts2容器控制器 -->
  <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>
  <!-- spring容器配置 -->
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath:applicationContext.xml</param-value>
  </context-param>

  <!-- spring容器监听器 -->
  <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>
  <!-- 欢迎页面 -->
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>

</web-app>

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<h1>something error~~~</h1>
</body>
</html>

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<form action="user_login.action" method="post">
    <input type="text" name="user.username" placeholder="靓仔or靓女：输入用户名" />
    <br/>
    <input type="password" name="user.password" placeholder="靓仔or靓女：输入密码" />
    <br />
    <input type="submit" value="登录">
    <input type="reset" value="重置">
</form>
</body>
</html>

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>success</title>
</head>
<body>
<h1>Genius Team -- ${user.username}</h1>
</body>
</html>

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

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>cn.hy.SSH</groupId>
  <artifactId>SSH案例一</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>SSH案例一 Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://www.example.com</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
    <spring.version>3.1.2.RELEASE</spring.version>
    <hibernate.version>3.6.5.Final</hibernate.version>
    <struts2.version>2.3.1</struts2.version>

  </properties>

  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <scope>test</scope>
    </dependency>

    <!-- spring -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-expression</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-orm</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>cglib</groupId>
      <artifactId>cglib-nodep</artifactId>
      <version>2.1_3</version>
    </dependency>


    <!-- hibernate -->
    <dependency>
      <groupId>org.hibernate</groupId>
      <artifactId>hibernate-core</artifactId>
      <version>${hibernate.version}</version>
    </dependency>

    <!-- struts2 -->
    <dependency>
      <groupId>org.apache.struts</groupId>
      <artifactId>struts2-core</artifactId>
      <version>${struts2.version}</version>
    </dependency>
    <!--config-browser-plugin插件，使用了这个插件之后，就可以很方便的浏览项目中的所有action及其与 jsp view的映射 -->
    <dependency>
      <groupId>org.apache.struts</groupId>
      <artifactId>struts2-junit-plugin</artifactId>
      <version>${struts2.version}</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.struts</groupId>
      <artifactId>struts2-spring-plugin</artifactId>
      <version>${struts2.version}</version>
    </dependency>

    <!-- 添加对数据库的支持 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.0.5</version>
    </dependency>

    <!-- 添加对数据源的支持 -->
    <dependency>
      <groupId>c3p0</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.1.2</version>
    </dependency>

  </dependencies>

  <build>
    <finalName>SSH案例一</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.1.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.8.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.22.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>