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  • (摘录笔记)JAVA学习笔记SSH整合搭建项目

    1:当然是导jar包啦;

    struts2:

    spring:

    hibernate:

    至于这些jar包是什么作用,我想就不必我解释了,大家都懂得,ssh2基本的jar包;

    还有一些其他jar包:struts2-spring-plugin-2.1.8.1.jar(struts2-spring整合使用的jar包) , c3p0-0.9.2-pre1.jar(使用链接池链接数据库)

    2:添加struts.xml文件

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    <?xml version="1.0" encoding="UTF-8" ?>
    <!DOCTYPE struts PUBLIC
            "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
            "http://struts.apache.org/dtds/struts-2.0.dtd">
    
    <struts>
        <!-- Overwrite Convention -->
        <package name="users" namespace="/lishun" extends="struts-default">
        <!-- 这里的action是叫spring管理了,所以这里的class属性值是写的是该被注入Action的id名称,后面的action类会有提到 -->
            <action name="users" class="usersAction" method="execute">
                <result name="success">/index.jsp</result>
            </action>
        </package>
    </struts>
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    配置web.xml

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    <?xml version="1.0" encoding="UTF-8"?>
    <web-app version="3.0" 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_3_0.xsd">
        <display-name></display-name>
        <welcome-file-list>
            <welcome-file>index.jsp</welcome-file>
        </welcome-file-list>
    
        <!-- 定义struts的核心监听器 -->
        <filter>
            <filter-name>action2</filter-name>
            <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
        </filter>
    
        <filter-mapping>
            <filter-name>action2</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
        
            
            <!-- 把struts与spring整合;;一定不要忘记导struts2-spring-plugin-2.1.8.1.jar 包 -->
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:application.xml</param-value>
        </context-param>
    </web-app>
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    配置hibernate.cfg.xml

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    <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" 
    "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!-- 执行数据库操作时显示sql语句 --> <property name="show_sql">true</property> <property name="dialect"> org.hibernate.dialect.MySQLDialect </property> <!-- 自动建表:若表不存在就创建表,若存在就不创建,若实体类发生改变就重新创建表 --> <property name="hbm2ddl.auto">update</property> <!-- 导入映射文件 --> <mapping resource="com/lishun/domian/Users.hbm.xml" /> </session-factory> </hibernate-configuration>

    复制代码


    配置application.xml

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    <beans xmlns="http://www.springframework.org/schema/beans"
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:aop="http://www.springframework.org/schema/aop"
        xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jdbc="http://www.springframework.org/schema/jdbc"
        xmlns:context="http://www.springframework.org/schema/context"
        xmlns:util="http://www.springframework.org/schema/util"
        xsi:schemaLocation="http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd
        http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.0.xsd
        http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
        http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
        http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd">
        
        <!-- 自动扫描com.lishun包下的所有bean,再通过注解来对这些bean进行注入值 -->
        <context:component-scan base-package="com.lishun"></context:component-scan>
        
        <!-- 加载属性文件来读取数据库链接字符串  -->
        <context:property-placeholder location="claspath:DataBaseConnection.properties"/>
        
        <bean name="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <!-- 把hibernate给spring管理 -->
        <property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
            <property name="dataSource">
                
                <bean class="com.mchange.v2.c3p0.ComboPooledDataSource">
                    <!-- 前面四项是数据库链接的四大字符串,这里是通过属性文件来读取数据库链接字符串 -->
                    <property name="jdbcUrl" value="${jdbcUrl}"></property>
                    <property name="user" value="${user}"></property>
                    <property name="password" value="${password}"></property>
                    <property name="driverClass" value="${driverClass}"></property>
                    <!-- 其他配置 -->
                    <!--初始化时获取三个连接,取值应在minPoolSize与maxPoolSize之间。Default: 3 -->
                    <property name="initialPoolSize" value="3"></property>
                    <!--连接池中保留的最小连接数。Default: 3 -->
                    <property name="minPoolSize" value="3"></property>
                    <!--连接池中保留的最大连接数。Default: 15 -->
                    <property name="maxPoolSize" value="5"></property>
                    <!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 -->
                    <property name="acquireIncrement" value="3"></property>
                    <!-- 控制数据源内加载的PreparedStatements数量。如果maxStatements与maxStatementsPerConnection均为0,则缓存被关闭。Default: 0 -->
                    <property name="maxStatements" value="8"></property>
                    <!--maxStatementsPerConnection定义了连接池内单个连接所拥有的最大缓存statements数。Default: 0 -->
                    <property name="maxStatementsPerConnection" value="5"></property>
                    <!--最大空闲时间,1800秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 -->
                    <property name="maxIdleTime" value="1800"></property>
                </bean>
            </property>
        </bean>
        <!-- 配置sessionFactory的事务,基于注解的方式 -->
        <bean name="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
            <property name="sessionFactory" ref="sessionFactory"></property>
        </bean>
        <tx:annotation-driven transaction-manager="txManager"/>
    </beans>

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    DataBaseConnection.properties属性文件

    3:测试

    这是我的目录结构,是一层调用着一层

    控制器Action:

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    @Controller("usersAction")//控制器注解,并定义改bean的id是usersAction,
    @Scope("prototype")//声明bean的作用域为prototype:每次从容器获取bean都是新的对象。
    public class UsersAction extends ActionSupport {
        
        @Resource
        private IUserService servise;
        public String execute(){
            servise.sava();
            return "success";
        }
    }
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    业务层seivice:

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    @Service//service层注解
    public class UserServiceBean implements IUserService {
    
        //给属性注入值
        @Resource
        public IUserDao userDao;
    
        @Override
        @Transactional //这个方法会自动开启事务和提交事务,当有异常时就回滚事务
        public void sava() {
            userDao.sava();
        }
    }
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    数据操作层dao:

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    public class UserDaoBean implements IUserDao {
    
        //从配置文件注入sessionfactory值
        @Resource
        private SessionFactory seesionFactory;
    
        @Override
        public void sava() {
            Session session = seesionFactory.getCurrentSession();
            System.out.println(session);
            Users u=new Users();
            u.setUname("王尼玛");
            session.save(u);
        }
    }
    复制代码

    最有一个javabean实体,这个实体很简单就只有id和name两个字段,测试用的没弄很多字段上去

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    public class Users {
        private Integer uid;
        private String uname;
        public Integer getUid() {
            return uid;
        }
        public void setUid(Integer uid) {
            this.uid = uid;
        }
        public String getUname() {
            return uname;
        }
        public void setUname(String uname) {
            this.uname = uname;
        }
        @Override
        public String toString() {
            return "Users [uid=" + uid + ", uname=" + uname + "]";
        }
    }
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    对应的映射文件

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    <?xml version="1.0"?>
    <!DOCTYPE hibernate-mapping PUBLIC
    "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
    "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">
    
    <hibernate-mapping package="com.lishun.domian" >
     <!-- 定义类名和对应的表名 -->
      <class name="Users" table="tb_users">
      
        <id name="uid" type="integer">
            <!-- 主键是自增的 -->
             <generator class="native"></generator>
        </id>
        <property name="uname"  type="string">
        </property>
      </class>
    </hibernate-mapping>
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    文章摘自:http://www.cnblogs.com/lishun1005/p/4412252.html
    天涯雪
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  • 原文地址:https://www.cnblogs.com/yeyuchangfeng/p/4412659.html
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