java web开发入门五(ssh整合)基于intellig idea
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SSH整合
1.引入jar包
Struts 核心jar
Hibernate 核心jar
Spring
Core 核心功能
Web 对web模块支持
Aop aop支持
Orm 对hibernate支持
Jdbc/tx jdbc支持包、事务相关包
2.配置xml
*.hbm.xml
<?xml version="1.0" encoding="UTF-8" ?> <!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.eggtwo.entity"> <class name="Student" table="t_student"> <id name="id" column="id"> <generator class="native"></generator> </id> <!-- 外键映射:多对一 --> <many-to-one name="grade" column="gradeId" class="Grade"></many-to-one> <property name="name"></property> <property name="age"></property> <property name="birthday"></property> </class> </hibernate-mapping>
web.xml
<?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_4_0.xsd" version="4.0"> <!-- 配置spring的OpenSessionInView模式 【目的:JSp页面访问懒加载数据】 --> <!-- 注意:访问struts时候需要带上*.action后缀,这样才能访问懒加载数据 --> <filter> <filter-name>OpenSessionInView</filter-name> <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class> </filter> <filter-mapping> <filter-name>OpenSessionInView</filter-name> <!--url请求设置--> <url-pattern>*.action</url-pattern> </filter-mapping> <!-- struts2配置 --> <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配置 --> <context-param> <param-name>contextConfigLocation</param-name> <param-value>classpath:bean*.xml</param-value> </context-param> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
bean.xml
每一个包中单独一个bean
<?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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" 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/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- 所有配置的公共部分 --> <!-- 1) 数据源对象: C3P0连接池实例 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="com.mysql.jdbc.Driver"></property> <property name="jdbcUrl" value="jdbc:mysql:///test"></property> <property name="user" value="root"></property> <property name="password" value="123456"></property> <property name="initialPoolSize" value="3"></property> <property name="maxPoolSize" value="6"></property> </bean> <!-- 2) SessionFactory实例创建 --> <!-- 所有的配置都由spring维护(项目中不需要hibernate.cfg.xml啦) --> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <!-- a. 连接池 --> <property name="dataSource" ref="dataSource"></property> <!-- b. hibernate常用配置: 方言、显示sql、自动建表等 --> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.hbm2ddl.auto">update</prop> </props> </property> <!-- c. 映射配置 --> <property name="mappingLocations"> <list> <value>classpath:com/eggtwo/entity/*.hbm.xml</value> </list> </property> </bean> <!-- 3) 事务配置 --> <!-- # 事务管理器 --> <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <!-- # 事务增强 --> <tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <tx:method name="*" read-only="false"/> </tx:attributes> </tx:advice> <!-- # AOP配置 --> <aop:config> <aop:pointcut expression="execution(* com.eggtwo.service.*.*(..))" id="pt"/> <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/> </aop:config> </beans>
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="myAction" extends="struts-default"> <!-- action实例交给spring容器创建 --> <!--注意:action的class不能写全称类,要写bean-action中的 bean id--> <!-- 这种写法是把action交给tomcat创建,所以类要写全称 <action name="show" class="com.eggtwo.action.StudentAction" method="execute"> <result name="success">/index.jsp</result> </action> --> <action name="show" class="studentAction" method="execute"> <result name="success">/index.jsp</result> </action> </package> </struts>
3.开发
Entity/Dao/service/action
Entity
package com.eggtwo.entity; import java.util.Date; public class Student { private int id; // private int gradeId; private String name; private int age; private Date birthday; private boolean isMan; public Grade getGrade() { return grade; } public void setGrade(Grade grade) { this.grade = grade; } private Grade grade; public int getId() { return id; } public void setId(int id) { this.id = id; } // public int getGradeId() { // return gradeId; // } // // public void setGradeId(int gradeId) { // this.gradeId = gradeId; // } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public Date getBirthday() { return birthday; } public void setBirthday(Date birthday) { this.birthday = birthday; } public boolean isMan() { return isMan; } public void setMan(boolean man) { isMan = man; } } entity实体对象
实体对象映射文件
<?xml version="1.0" encoding="UTF-8" ?> <!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.eggtwo.entity"> <class name="Student" table="t_student"> <id name="id" column="id"> <generator class="native"></generator> </id> <!-- 外键映射:多对一 --> <many-to-one name="grade" column="gradeId" class="Grade"></many-to-one> <property name="name"></property> <property name="age"></property> <property name="birthday"></property> </class> </hibernate-mapping> entity实体对象映射数据库XML文件
Dao
package com.eggtwo.dao; import com.eggtwo.entity.Student; import org.hibernate.SessionFactory; import org.hibernate.classic.Session; import org.springframework.orm.hibernate4.HibernateTemplate; import java.io.Serializable; import java.util.List; public class StudentDao { private SessionFactory sessionFactory; public void setSessionFactory(SessionFactory sessionFactory) { this.sessionFactory = sessionFactory; } public void save(Student student){ //HibernateTemplate hibernateTemplate=new HibernateTemplate(sessionFactory); sessionFactory.getCurrentSession().save(student); } public Student findById(Serializable id){ Student o = (Student) sessionFactory.getCurrentSession().get(Student.class, id); return o; } // public List<Student> findList(){ // Session currentSession = sessionFactory.getCurrentSession(); // currentSession.find() // } } 数据访问
Service:事务处理在此包中
package com.eggtwo.service; import com.eggtwo.dao.StudentDao; import com.eggtwo.entity.Student; import java.io.Serializable; public class StudentService { private StudentDao studentDao; public void setStudentDao(StudentDao studentDao) { this.studentDao = studentDao; } public void save(Student student){ studentDao.save(student); } public Student findById(Serializable id){ return studentDao.findById(id); } } 服务
action
package com.eggtwo.action; import com.eggtwo.entity.Student; import com.eggtwo.service.StudentService; import com.opensymphony.xwork2.ActionContext; import com.opensymphony.xwork2.ActionSupport; import org.omg.PortableServer.REQUEST_PROCESSING_POLICY_ID; import java.util.Map; public class StudentAction extends ActionSupport { //IOC注入 private StudentService studentService; public void setStudentService(StudentService studentService) { this.studentService = studentService; } @Override public String execute() throws Exception { int studentId = 2; Student student = studentService.findById(studentId); Map<String, Object> request = (Map<String, Object>) ActionContext.getContext().get("request"); request.put("student", student); return SUCCESS; } } action
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