SSH框架整合教程
工程目录结构如下：
本工程只介绍SSH整合的基本流程，所以没有写接口
1. 导入jar包
<dependencies><!--hibernate包--><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-core</artifactId><version>5.2.10.Final</version></dependency><!-- 添加mysql驱动依赖 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.12</version></dependency><!--日志包--><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>1.6.1</version></dependency><!--spring相关包--><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>4.3.11.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</artifactId><version>4.3.11.RELEASE</version></dependency><!--aop--><dependency><groupId>org.springframework</groupId><artifactId>spring-aspects</artifactId><version>4.3.11.RELEASE</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-orm</artifactId><version>4.3.11.RELEASE</version></dependency><!--Servlet相关包--><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.1.0</version></dependency><dependency><groupId>jstl</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency>
</dependencies>
<build><finalName>ssh-test01</finalName><!--要配置这个资源路径，否则xml文件找不到--><resources><resource><directory>src/main/java</directory><includes><include>**/*.xml</include></includes><filtering>true</filtering></resource><resource><directory>src/main/resources</directory><includes><include>**/*.xml</include><include>**/*.properties</include></includes></resource></resources>
</build>
2. DAO和实体类
dao和实体类是hibernate相关的部分：
实体类Dept
package com.ssh.pojo;
public class Dept {private Integer id;private String name;//getter/setter方法略
}
映射文件Dept.hbm.xml
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping><class name="com.ssh.pojo.Dept" table="DEPT"><id name="id" type="java.lang.Integer"><column name="ID" precision="10" scale="0"/><generator class="identity"/></id><property name="name" type="java.lang.String"><column name="NAME" length="20"/></property></class>
</hibernate-mapping>
实体类Employee
package com.ssh.pojo;public class Employee {private Integer id;private String name;private Dept dept;//getter/setter方法略
}
映射文件：
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping><class name="com.ssh.pojo.Employee" table="EMPLOYEE"><id name="id" type="java.lang.Integer"><column name="ID" precision="10" scale="0"/><generator class="identity"/></id><property name="name" type="java.lang.String"><column name="NAME" length="20"/></property><!--多对一--><many-to-one name="dept" class="com.ssh.pojo.Dept"><column name="DEPT_ID"/></many-to-one></class>
</hibernate-mapping>
EmployeeDAO
package com.ssh.dao;import com.ssh.pojo.Employee;
import org.hibernate.criterion.DetachedCriteria;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;import java.util.List;//HibernateDaoSupport是Spring提供的类，对Hibernate的Session进行了封装
public class EmployeeDAO extends HibernateDaoSupport {//添加public void addEmployee(Employee emp) {super.getHibernateTemplate().save(emp);}//条件查询public List<Employee> getEmpByCriteria(DetachedCriteria criteria) {return (List<Employee>)super.getHibernateTemplate().findByCriteria(criteria);}
}
DeptDAO
package com.ssh.dao;import com.ssh.pojo.Dept;
import org.springframework.orm.hibernate5.support.HibernateDaoSupport;import java.util.List;public class DeptDAO extends HibernateDaoSupport {public List<Dept> getDeptList() {return (List<Dept>) super.getHibernateTemplate().find("from Dept", null);}
}
3. Hibernate和Spring的整合
Hibernate和Spring整合的时候，Spring主要负责管理Hibernate的Session和事务
在spring-config.xml中进行配置：
<?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:aop="http://www.springframework.org/schema/aop"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.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.2.xsdhttp://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsdhttp://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd"><!--spring管理数据源--><context:property-placeholder location="classpath:jdbc.properties" ignore-unresolvable="true"/><bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"><property name="driverClassName" value="${jdbc.driver}"/><property name="url" value="${jdbc.url}"/><property name="username" value="${jdbc.username}"/><property name="password" value="${jdbc.password}"/></bean><!-- 配置hibernate的SessionFactory --><bean id="sessionFactory"class="org.springframework.orm.hibernate5.LocalSessionFactoryBean"><property name="dataSource" ref="dataSource"/><!-- hibernate配置信息 --><property name="hibernateProperties"><props><prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop><prop key="hibernate.show_sql">true</prop><prop key="hibernate.format_sql">true</prop></props></property><!--也可以写单独的hibernate配置文件--><!--<property name="configLocation" value="classpath:hibernate.cfg.xml"></property>--><!--扫描映射文件所在的包--><!--<property name="mappingLocations" value="classpath:com/ssh/pojo/*.hbm.xml"/>--><!--可以每个文件单独配置--><property name="mappingResources"><list><value>com/ssh/pojo/Employee.hbm.xml</value><value>com/ssh/pojo/Dept.hbm.xml</value></list></property></bean><!-- 配置事务管理器 --><bean id="transactionManager"class="org.springframework.orm.hibernate5.HibernateTransactionManager"><property name="sessionFactory" ref="sessionFactory"/></bean><!--事务增强--><tx:advice id="txAdvice" transaction-manager="transactionManager"><tx:attributes><!-- 传播行为，匹配的是方法名 --><tx:method name="add*" rollback-for="Exception"/><tx:method name="delete*" rollback-for="Exception"/><tx:method name="update*" rollback-for="Exception"/><tx:method name="get*" propagation="SUPPORTS" read-only="true"/><tx:method name="do*" rollback-for="Exception"/></tx:attributes></tx:advice><!-- 通过AOP配置提供事务增强，让service包下所有Bean的所有方法拥有事务 --><aop:config><aop:pointcut id="serviceMethod"expression="execution(* com.ssh.service..*(..))"/><aop:advisor pointcut-ref="serviceMethod" advice-ref="txAdvice"/></aop:config><bean id="employeeDAO" class="com.ssh.dao.EmployeeDAO"><property name="sessionFactory" ref="sessionFactory"/></bean><bean id="deptDAO" class="com.ssh.dao.DeptDAO"><property name="sessionFactory" ref="sessionFactory"/></bean>
</beans>
数据库配置文件jdbc.properties：
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/数据库?characterEncoding=utf-8
jdbc.username=用户名
jdbc.password=密码
日志文件log4j.properties
log4j.rootLogger=DEBUG, stdout, log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c] - %m%n
4. Service
EmployeeService
package com.ssh.service;import com.ssh.dao.EmployeeDAO;
import com.ssh.pojo.Employee;
import org.hibernate.criterion.DetachedCriteria;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.util.List;@Service
public class EmployeeService {@Autowiredprivate EmployeeDAO employeeDAO;public void addEmployee(Employee emp) {employeeDAO.addEmployee(emp);}public List<Employee> getEmpByCriteria(DetachedCriteria criteria) {return employeeDAO.getEmpByCriteria(criteria);}
}
DeptService
package com.ssh.service;import com.ssh.dao.DeptDAO;
import com.ssh.pojo.Dept;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.util.List;@Service
public class DeptService {@Autowiredprivate DeptDAO deptDAO;public List<Dept> getDeptList(){return deptDAO.getDeptList();}
}
在spring-config.xml中配置对Service的扫描：
<context:component-scan base-package="com.ssh.service"><context:include-filter type="annotation" expression="org.springframework.stereotype.Service"/>
</context:component-scan>
5. Controller
Controller就是SpringMVC的部分了：
package com.ssh.controller;import com.ssh.pojo.Dept;
import com.ssh.pojo.Employee;
import com.ssh.service.DeptService;
import com.ssh.service.EmployeeService;
import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.Restrictions;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;import java.util.List;@Controller
@RequestMapping("/emp")
public class EmpController {@Autowiredprivate EmployeeService employeeService;@Autowiredprivate DeptService deptService;@RequestMapping("/list.html")public String list(Employee employee, Model model) {//封装查询条件DetachedCriteria criteria=DetachedCriteria.forClass(Employee.class);if(employee.getName()!=null&&employee.getName().trim().length()>0){criteria.add(Restrictions.like("name","%"+employee.getName()+"%"));}model.addAttribute("employeeList", employeeService.getEmpByCriteria(criteria));return "/emp_list.jsp";}//去添加员工的页面@RequestMapping("/go_add.html")public ModelAndView goAdd() {List<Dept> deptList = deptService.getDeptList();return new ModelAndView("/emp_add.jsp", "deptList", deptList);}@RequestMapping("/add.html")public String add(Employee employee) {employeeService.addEmployee(employee);//添加成功后跳转到列表页return "redirect:/emp/list.html";}}
SpringMVC-servlet.xml
<?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:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsdhttp://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsdhttp://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd"><!-- 启动注解，注册服务--><mvc:annotation-driven/><!-- 启动自动扫描 --><context:component-scan base-package="com.ssh.controller"><!-- 制定扫包规则 ,只扫描使用@Controller注解的JAVA类 --><context:include-filter type="annotation" expression="org.springframework.stereotype.Controller"/></context:component-scan></beans>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app 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/javaeehttp://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"version="3.0"><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-config.xml</param-value></context-param><!--配置listener，在启动Web容器的时候加载Spring的配置--><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>
<!--处理中文乱码-->
<filter><filter-name>CharacterEncodingFilter</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param><init-param><param-name>forceEncoding</param-name><param-value>true</param-value></init-param>
</filter><!--处理hibernate懒加载问题--><filter><filter-name>openSessionInView</filter-name><filter-class>org.springframework.orm.hibernate5.support.OpenSessionInViewFilter</filter-class></filter><filter-mapping><filter-name>openSessionInView</filter-name><url-pattern>*.html</url-pattern></filter-mapping><!--配置DispatcherServlet --><servlet><servlet-name>springMVC</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class></servlet><servlet-mapping><servlet-name>springMVC</servlet-name><url-pattern>*.html</url-pattern></servlet-mapping>
</web-app>
6. 页面
emp_add.jsp
<form action="/emp/add.html" method="post">员工姓名：<input type="text" name="name"/><br/>部门：<select name="dept.id"><c:forEach items="${deptList}" var="dept"><option value="${dept.id}">${dept.name}</option></c:forEach>
</select><br/><input type="submit" value="提交"/>
</form>
运行结果：
emp_list.jsp
<form action="/emp/list.html" method="post">员工姓名：<input type="text" name="name"/><input type="submit" value="搜索"/>
</form>
<table><tr><td>id</td><td>姓名</td><td>部门</td></tr><c:forEach items="${employeeList}" var="emp"><tr><td>${emp.id}</td><td>${emp.name}</td><td>${emp.dept.name}</td></tr></c:forEach>
</table>
运行结果：
