一、首先通过maven加入spring、jpa和hibernate相关的jar包。如pom.xml: Java代码 收藏代码 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId> cn.ibeans</groupId> <artifactId>ibeans</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>myweb Maven Webapp</name> <url>http://maven.apache.org</url> <!-- 定义相关属性 --> <properties> <jdk-version>1.6</jdk-version> <junit-version>4.11</junit-version> <spring-version>3.2.2.RELEASE</spring-version> </properties> <!-- 定义依赖包 --> <dependencies> <!-- spring begin--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring-version}</version> </dependency> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-jpa</artifactId> <version>1.3.2.RELEASE</version> </dependency> <!-- spring end --> <!-- servlet begin --> <dependency> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> <version>3.0-alpha-1</version> <scope>provided</scope> </dependency> <!-- servlet end --> <!-- junit begin --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junit-version}</version> <scope>test</scope> </dependency> <!-- junit end --> <!-- hibernate begin --> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>4.2.1.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> <version>4.2.1.Final</version> </dependency> <dependency> <groupId>org.hibernate.common</groupId> <artifactId>hibernate-commons-annotations</artifactId> <version>4.0.1.Final</version> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-validator</artifactId> <version>5.0.0.Final</version> </dependency> <!-- hibernate end --> <!--logger begin --> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>1.7.5</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>jcl-over-slf4j</artifactId> <version>1.7.5</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.5</version> </dependency> <!-- logger end --> <!-- database begin --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.25</version> </dependency> <!-- database end --> <!-- apache commons begin --> <dependency> <groupId>commons-dbcp</groupId> <artifactId>commons-dbcp</artifactId> <version>20030825.184428</version> </dependency> <dependency> <groupId>commons-pool</groupId> <artifactId>commons-pool</artifactId> <version>20030825.183949</version> </dependency> <dependency> <groupId>commons-collections</groupId> <artifactId>commons-collections</artifactId> <version>2.1</version> </dependency> <!-- apache commons end --> </dependencies> <!-- 配置构建 --> <build> <finalName>ibeans</finalName> </build> </project> 2、配置applicationContext.xml中的实体管理工厂和事务机制: Java代码 收藏代码 <?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:jdbc="http://www.springframework.org/schema/jdbc" xmlns:jee="http://www.springframework.org/schema/jee" xmlns:tx="http://www.springframework.org/schema/tx" xmlns:jpa="http://www.springframework.org/schema/data/jpa" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.2.xsd http://www.springframework.org/schema/jdbc http://www.springframework.org/schema/jdbc/spring-jdbc-3.2.xsd http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-3.2.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd" default-lazy-init="true"> <description>Spring公共配置 </description> <!-- 使用annotation 自动注册bean, 并保证@Required、@Autowired的属性被注入 --> <context:component-scan base-package="cn.ibeans"> <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller"/> </context:component-scan> <!-- JPA实体管理工厂的配置 --> <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> <property name="dataSource" ref="dataSource"/> <property name="jpaVendorAdapter" ref="hibernateJpaVendorAdapter"/> <property name="packagesToScan" value="cn.ibeans"/><!--待扫描的实体类包,不再需要persistence.xml了--> <property name="jpaProperties"> <props> <prop key="hibernate.ejb.naming_strategy">org.hibernate.cfg.ImprovedNamingStrategy</prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.hbm2ddl.auto">update</prop> </props> </property> </bean> <!--指定实现JPA的适配器--> <bean id="hibernateJpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> <property name="databasePlatform" value="org.hibernate.dialect.MySQLDialect" /> </bean> <!-- Jpa 事务配置 --> <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager"> <property name="entityManagerFactory" ref="entityManagerFactory"/> </bean> <!-- Spring Data Jpa配置 --> <!-- <jpa:repositories base-package="cn.ibeans" transaction-manager-ref="transactionManager" entity-manager-factory-ref="entityManagerFactory"/> --> <!-- 使用annotation定义事务 --> <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" /> <!-- JSR303 Validator定义 --> <bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean" /> <!-- production环境 --> <beans profile="production"> <context:property-placeholder ignore-unresolvable="true" location="classpath*:/db.properties" /> <!-- 数据源配置, 使用DBCP数据库连接池 --> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <!-- Connection Info --> <property name="driverClassName" value="${jdbc.driver}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <!-- Connection Pooling Info --> <property name="maxActive" value="${dbcp.maxActive}" /> <property name="maxIdle" value="${dbcp.maxIdle}" /> <property name="defaultAutoCommit" value="false" /> <!-- 连接Idle一个小时后超时 --> <property name="timeBetweenEvictionRunsMillis" value="3600000" /> <property name="minEvictableIdleTimeMillis" value="3600000" /> </bean> <!-- 数据源配置,使用应用服务器的数据库连接池 --> <!--<jee:jndi-lookup id="dataSource" jndi-name="java:comp/env/jdbc/ExampleDB" />--> </beans> <!-- local development环境 --> <beans profile="development"> <context:property-placeholder ignore-resource-not-found="true" location="classpath*:/db.properties, classpath*:/db_dev.properties" /> <!-- DBCP连接池 --> <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc.driver}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> <property name="defaultAutoCommit" value="false" /> </bean> </beans> <!-- unit test环境 --> <beans profile="test"> <context:property-placeholder ignore-resource-not-found="true" location="classpath*:/db_test.properties" /> <!-- Simple连接池 --> <bean id="dataSource" class="org.springframework.jdbc.datasource.SimpleDriverDataSource"> <property name="driverClass" value="${jdbc.driver}" /> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> </bean> <!-- 初始化数据表结构 与默认数据--> <jdbc:initialize-database data-source="dataSource" ignore-failures="ALL"> <jdbc:script location="classpath:sql/h2/schema.sql" /> <jdbc:script location="classpath:data/import-data.sql" encoding="UTF-8"/> </jdbc:initialize-database> </beans> </beans> 定义实体类:User.java Java代码 收藏代码 package cn.ibeans.web.model; import java.io.Serializable; import javax.persistence.Column; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence.Table; import org.hibernate.annotations.GenericGenerator; @Entity @Table(name="i_user") public class User implements Serializable{ private String id; private String username; private String password; @Id @GeneratedValue(generator="system-uuid") @GenericGenerator(name="system-uuid",strategy="uuid") public String getId() { return id; } public void setId(String id) { this.id = id; } @Column(name="username") public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } @Column(name="password") public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } } 3、定义dao接口,只需定义接口方法即可,不用加任何注解 Java代码 收藏代码 package cn.ibeans.dao; import cn.ibeans.web.model.User; public interface UserDao { User findByName(String name); User findByLoginName(String loginName); void saveOrUpdate(User user); } 4、定义dao实现类。用@Repository注解类,并将EntityManager作为成员变量注入,注入方法是加@PersistenceContext Java代码 收藏代码 package cn.ibeans.dao.impl; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import org.springframework.stereotype.Repository; import cn.ibeans.dao.UserDao; import cn.ibeans.web.model.User; @Repository public class UserDaoImpl implements UserDao { @PersistenceContext private EntityManager em; @Override public User findByName(String name) { return null; } @Override public User findByLoginName(String loginName) { return null; } @Override public void saveOrUpdate(User user) { em.persist(user); } } 5、定义service类。可直接写实现类 用@Component或@Service注释类,将dao接口作为成员变量注入,注入方法是加@Autowired 如果是写方法,需在方法上加@Transactional(readOnly=false)注解 Java代码 收藏代码 package cn.ibeans.service; import javax.annotation.Resource; import org.apache.log4j.Logger; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import org.springframework.transaction.annotation.Transactional; import cn.ibeans.dao.UserDao; import cn.ibeans.web.model.User; @Component public class UserService { private static Logger logger = Logger.getLogger(UserService.class); @Autowired private UserDao userDao; @Transactional(readOnly=false) public void saveUser(User user){ userDao.saveOrUpdate(user); logger.debug(user.getUsername()+",保存成功!"); } } 6、定义action 用@Controller注释action类,如果需为该action中所有方法指定一个共用的上层路径名,则需用@RequestMapping(value="/user")注释该类。表示该类下的所有访求均要通过/user/**来访问 将service类作为成员变量注入action。注入方法是加@Autowired 用@RequestMapping(value="/save")注释action的方法。 Java代码 收藏代码 package cn.ibeans.web.controller; import javax.servlet.ServletContext; import javax.servlet.http.HttpServlet; import org.apache.log4j.Logger; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.context.ContextLoader; import org.springframework.web.context.WebApplicationContext; import cn.ibeans.service.UserService; import cn.ibeans.web.model.User; @Controller @RequestMapping(value="/user") public class LoginController extends HttpServlet{ private static Logger log = Logger.getLogger(LoginController.class); @Autowired private UserService userService; //@RequestMapping(value="/login") //如果类级别上已有映射地址(/user),此处的完整请求地址是/user/login public String doLogin(Model model,Object loginForm){ //model.addAttribute("username",username); //model被用来封装数据,向前台传递 WebApplicationContext context = ContextLoader.getCurrentWebApplicationContext(); ServletContext sc = context.getServletContext(); return "/welcome"; } @RequestMapping(value="/login") public String login(@ModelAttribute User user,Model model){ log.info(user.getUsername()); model.addAttribute(user); return "/welcome"; } @RequestMapping(value="/save") public String save(@ModelAttribute User user,Model model){ log.info(user.getUsername()); userService.saveUser(user); model.addAttribute(user); return "/welcome"; } } 7、发起请示的页面 请示的url应该是上下文根路径+action类路径+方法路径 Java代码 收藏代码 <%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Insert title here</title> </head> <body> <div> <form action="/ibeans/user/save" methed="post"> <input type="text" name="username"> <input type="text" name="password"> <input type="submit" value="SUBMIT"> </form> </div> </body> </html> 8、转发目的页面 可以通过引用action方法里定义的mode属性来获取相关的数据。 welcome.jsp: Java代码 收藏代码 <%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>Insert title here</title> </head> <body> ${user.username },你好! </body> </html>
http://ll-feng.iteye.com/blog/1908511