The project directory structure is as follows:
1. Import jar package
<dependencies> <!--hibernate package--> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>5.2.10.Final</version> </dependency> <!-- Add mysql driver dependency --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.12</version> </dependency> <!--log package--> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.6.1</version> </dependency> <!--spring related packages--> <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 related packages--> <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> <!--To configure this resource path, otherwise the xml file cannot be found--> <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>
Dao and entity classes
Dao and entity classes are related parts of hibernate
Entity class Dept
package com.ssh.pojo; public class Dept {<!-- --> private Integer id; private String name; //getter/setter method slightly }
Mapping file 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>
Entity class Employee
package com.ssh.pojo; public class Employee {<!-- --> private Integer id; private String name; private Dept dept; //getter/setter method slightly }
Mapping file Employee.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.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> <!--many to one--> <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 is a class provided by Spring, which encapsulates Hibernate's Session public class EmployeeDAO extends HibernateDaoSupport {<!-- --> //Add to public void addEmployee(Employee emp) {<!-- --> super.getHibernateTemplate().save(emp); } //Condition query 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. Integration of Hibernate and Spring
When Hibernate and Spring are integrated, Spring is mainly responsible for managing Hibernate’s Session and transactions
Configure in spring-config.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: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/beanshttp://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd"> <!--spring management data source--> <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> <!-- Configure hibernate's SessionFactory --> <bean id="sessionFactory" class="org.springframework.orm.hibernate5.LocalSessionFactoryBean"> <property name="dataSource" ref="dataSource"/> <!-- hibernate configuration information --> <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> <!--You can also write a separate hibernate configuration file --> <!--<property name="configLocation" value="classpath:hibernate.cfg.xml"></property>--> <!--Scan the package where the mapping file is located--> <!--<property name="mappingLocations" value="classpath:com/ssh/pojo/*.hbm.xml"/>--> <!-- Each file can be configured separately --> <property name="mappingResources"> <list> <value>com/ssh/pojo/Employee.hbm.xml</value> <value>com/ssh/pojo/Dept.hbm.xml</value> </list> </property> </bean> <!-- Configure transaction manager --> <bean id="transactionManager" class="org.springframework.orm.hibernate5.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"/> </bean> <!--Transaction Enhancement--> <tx:advice id="txAdvice" transaction-manager="transactionManager"> <tx:attributes> <!-- Propagation behavior, matching the method name --> <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> <!-- Provide transaction enhancement through AOP configuration, so that all methods of all beans under the service package have transactions --> <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>
Database configuration file jdbc.properties:
jdbc.driver=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/database?characterEncoding=utf-8 jdbc.username=Username jdbc.password=password Log file 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 {<!-- --> @Autowired private 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 {<!-- --> @Autowired private DeptDAO deptDAO; public List<Dept> getDeptList(){<!-- --> return deptDAO. getDeptList(); } }
Configure the scan of Service in spring-config.xml:
<context:component-scan base-package="com.ssh.service"> <context:include-filter type="annotation" expression="org.springframework.stereotype.Service"/> </context:component-scan>
5, Controller
Controller is part of SpringMVC:
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 {<!-- --> @Autowired private EmployeeService employeeService; @Autowired private DeptService deptService; @RequestMapping("/list.html") public String list(Employee employee, Model model) {<!-- --> //Encapsulate query conditions DetachedCriteria criteria=DetachedCriteria.forClass(Employee.class); if(employee.getName()!=null & amp; & amp;employee.getName().trim().length()>0){<!-- --> criteria.add(Restrictions.like("name","%" + employee.getName() + "%")); } model.addAttribute("employeeList", employeeService.getEmpByCriteria(criteria)); return "/emp_list.jsp"; } // go to add employee page @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); //Jump to the list page after adding successfully 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.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd"> <!-- Start annotations, register services --> <mvc:annotation-driven/> <!-- Start automatic scanning --> <context:component-scan base-package="com.ssh.controller"> <!-- Make package scanning rules, only scan JAVA classes annotated with @Controller --> <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/javaee http://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> <!--Configure the listener to load the Spring configuration when starting the Web container--> <listener> <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> </listener> <!--Process Chinese garbled characters--> <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> <!--Hibernate lazy loading problem--> <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> <!--Configure 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. Page
emp_add.jsp
<form action="/emp/add.html" method="post"> Employee name: <input type="text" name="name"/><br/> Department: <select name="dept.id"> <c:forEach items="${deptList}" var="dept"> <option value="${dept.id}">${dept.name}</option> </c:forEach> </select><br/> <input type="submit" value="submit"/> </form>
operation result
emp_list.jsp
<form action="/emp/list.html" method="post"> Employee name: <input type="text" name="name"/> <input type="submit" value="Search"/> </form> <table> <tr> <td>id</td> <td>Name</td> <td>Department</td> </tr> <c:forEach items="${employeeList}" var="emp"> <tr> <td>${emp.id}</td> <td>${emp.name}</td> <td>${emp.dept.name}</td> </tr> </c:forEach> </table>
operation result