(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
<?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>
配置web.xml
<?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>
配置hibernate.cfg.xml
<!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>
配置application.xml
<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>
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:
@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"; } }
业务层seivice:
@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(); } }
数据操作层dao:
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); } }
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
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 + "]"; } }
对应的映射文件
<?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>
天涯雪