首先新建一个Maven项目。百度一下会有非常多实例，这里就不介绍了，直接奔主题。如题：这里使用的是Hibernate4和Spring3，使用的JPA和Spring注解，然后JDK版本号是1.7以下这张图片演示的是整个项目的结构图。——————————————————-
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—————————————————首先配置pom.xml，将所需的jar包配置好。例如以下，
<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>org.phn</groupId><artifactId>PHN</artifactId><packaging>war</packaging><version>0.0.1-SNAPSHOT</version><name>PHN Maven Webapp</name><url>http://maven.apache.org</url><!-- 指定maven仓库 --><repositories><!-- 发现依赖和扩展的远程资源库 --><!-- maven自己官方仓库 --><repository><id>maven</id><name>Maven Repository Switchboard</name><layout>default</layout><url>http://repo1.maven.org/maven2</url><snapshots><enabled>false</enabled></snapshots></repository><!-- 阿里巴巴公布版本号仓库 --><repository><id>alibaba-opensource</id><name>alibaba-opensource</name><url>http://code.alibabatech.com/mvn/releases/</url><layout>default</layout></repository><!-- 阿里巴巴快照版本号仓库 --><repository><id>alibaba-opensource-snapshot</id><name>alibaba-opensource-snapshot</name><url>http://code.alibabatech.com/mvn/snapshots/</url><layout>default</layout></repository></repositories><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><!-- spring版本号号 --><spring.version>3.2.4.RELEASE</spring.version><hibernate.version>4.2.5.Final</hibernate.version><!-- log4j日志文件管理包版本号 --><!-- <slf4j.version>1.7.10</slf4j.version> --><log4j.version>1.2.17</log4j.version></properties><!-- maven打成war包放到tomcat文件夹下，就可以执行 --><build><finalName>PHN</finalName><plugins><plugin><artifactId>maven-war-plugin</artifactId></plugin><plugin><artifactId>maven-compiler-plugin</artifactId><configuration><source>1.7</source><target>1.7</target></configuration></plugin></plugins></build><dependencies><!-- junit測试包 --><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.11</version><scope>test</scope></dependency><!-- servlet api jar --><dependency><groupId>javax.servlet</groupId><artifactId>servlet-api</artifactId><version>3.0-alpha-1</version><scope>provided</scope></dependency><!-- jstl --><dependency><groupId>javax.servlet</groupId><artifactId>jstl</artifactId><version>1.2</version></dependency><dependency><groupId>javax.servlet.jsp</groupId><artifactId>jsp-api</artifactId><version>2.1</version><scope>provided</scope></dependency><!-- 文件上传 --><dependency><groupId>commons-fileupload</groupId><artifactId>commons-fileupload</artifactId><version>1.2.2</version></dependency><!-- fastJson json数组有关的 --><dependency><groupId>com.alibaba</groupId><artifactId>fastjson</artifactId><version>1.1.26</version></dependency><!-- 使用 Jackson 把 Java 对象转换成 JSON 字串 --><dependency><groupId>org.codehaus.jackson</groupId><artifactId>jackson-mapper-asl</artifactId><version>1.9.11</version></dependency><!-- mysql驱动包 --><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.29</version></dependency><!-- 阿里巴巴数据源包 --><dependency><groupId>com.alibaba</groupId><artifactId>druid</artifactId><version>1.0.2</version></dependency><!-- 日志文件管理包 --><!-- log start --><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>${log4j.version}</version></dependency><!-- <dependency><groupId>org.slf4j</groupId><artifactId>slf4j-api</artifactId><version>${slf4j.version}</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>${slf4j.version}</version></dependency> --><!-- aspectjweaver.jar这是Spring AOP所要用到的包 --><dependency><groupId>org.aspectj</groupId><artifactId>aspectjweaver</artifactId><version>1.7.1</version></dependency><!-- hibernate4 --><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-core</artifactId><version>4.2.5.Final</version></dependency><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-entitymanager</artifactId><version>${hibernate.version}</version></dependency><dependency><groupId>org.hibernate</groupId><artifactId>hibernate-ehcache</artifactId><version>${hibernate.version}</version></dependency><dependency><groupId>org.hibernate.javax.persistence</groupId><artifactId>hibernate-jpa-2.0-api</artifactId><version>1.0.1.Final</version></dependency><!-- spring mvc --><dependency><groupId>org.springframework</groupId><artifactId>spring-webmvc</artifactId><version>${spring.version}</version></dependency><!-- spring3 --><dependency><groupId>org.springframework</groupId><artifactId>spring-core</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-context</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-jdbc</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>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-expression</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-orm</artifactId><version>${spring.version}</version></dependency><dependency><groupId>org.springframework</groupId><artifactId>spring-test</artifactId><version>${spring.version}</version></dependency></dependencies></project>
然后建日志配置文件log4j.properties，例如以下
log4j.rootLogger=INFO,A1,Rlog4j.appender.A1=org.apache.log4j.ConsoleAppenderlog4j.appender.A1.Target=System.outlog4j.appender.A1.layout=org.apache.log4j.PatternLayoutlog4j.appender.A1.layout.ConversionPattern=[%c]%m%nlog4j.appender.R=org.apache.log4j.RollingFileAppenderlog4j.appender.R.File=sshf.loglog4j.appender.R.MaxFileSize=10MBlog4j.appender.R.Threshold=ALLlog4j.appender.R.layout=org.apache.log4j.PatternLayoutlog4j.appender.R.layout.ConversionPattern=[%p][%d{yyyy-MM-dd HH\:mm\:ss,SSS}][%c]%m%n
继续建jdbc配置文件config.properties，例如以下。当中非常多多余的。能够依照自己须要的进行配置。相信都会看得懂的，
#\u5C5E\u6027\u6587\u4EF6#Oracle \u7684\u914D\u7F6E#hibernate.dialect=org.hibernate.dialect.OracleDialect#driverClassName=oracle.jdbc.driver.OracleDriver#validationQuery=SELECT 1 FROM DUAL#jdbc_url=jdbc:oracle:thin:@localhost:1521:orcl#jdbc_username=#jdbc_password=#SQLServer \u7684\u914D\u7F6E#hibernate.dialect=org.hibernate.dialect.SQLServerDialect#driverClassName=net.sourceforge.jtds.jdbc.Driver#validationQuery=SELECT 1#jdbc_url=jdbc:jtds:sqlserver://127.0.0.1:1433/sy#jdbc_username=#jdbc_password=#Derby \u7684\u914D\u7F6E#hibernate.dialect=org.hibernate.dialect.DerbyDialect#driverClassName=org.apache.derby.jdbc.EmbeddedDriver#validationQuery=SELECT 1#jdbc_url=jdbc:derby:sy;create=true#jdbc_username=#jdbc_password=#MySQL \u7684\u914D\u7F6Ehibernate.dialect=org.hibernate.dialect.MySQLDialectdriverClassName=com.mysql.jdbc.DrivervalidationQuery=SELECT 1jdbc_url=jdbc:mysql://localhost:3306/phn?useUnicode=true&characterEncoding=utf-8jdbc_username=rootjdbc_password=123456hibernate.hbm2ddl.auto=updatehibernate.show_sql=truehibernate.format_sql=falsesessionInfoName=sessionInfouploadFieldName=filedatauploadFileMaxSize=20971520uploadFileExts=txt,rar,zip,doc,docx,xls,xlsx,jpg,jpeg,gif,png,swf,wmv,avi,wma,mp3,miduploadDirectory=attached
接着继续配置web.xml文件，当中有3个文件，名为：spring.xml,spring-hibernate.xml,spring-mvc.xml，顾名思义相信大家应该也能够猜出一部分。当中spring.xml和spring-hibernate.xml是能够合并成applicationcontext.xml文件的，这里是为了区分以后可能会有什么Spring-mybatis.xml等等，
<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns="http://java.sun.com/xml/ns/javaee"xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"version="3.0"><display-name></display-name><!-- spring hibernate --><context-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring.xml,classpath:spring-hibernate.xml</param-value></context-param><!-- openSessionInView配置 --><filter><filter-name>openSessionInViewFilter</filter-name><filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class><init-param><param-name>singleSession</param-name><param-value>true</param-value></init-param></filter><!--spring mvc 配置 --><servlet><servlet-name>springMVC</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>classpath:spring-mvc.xml</param-value></init-param><load-on-startup>1</load-on-startup> <!-- 是启动顺序，让这个Servlet随Servletp容器一起启动。 --></servlet><servlet-mapping><servlet-name>springMVC</servlet-name><url-pattern>/</url-pattern> <!-- 会拦截/的请求。 --></servlet-mapping><!-- encodeing --><filter><filter-name>encodingFilter</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><!-- encoding filter for jsp page --><filter-mapping><filter-name>encodingFilter</filter-name><url-pattern>/*</url-pattern></filter-mapping><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener><welcome-file-list><welcome-file>/WEB-INF/jsp/login.jsp</welcome-file></welcome-file-list></web-app>
接着我们開始建Spring.xml，例如以下，就不解释具体元素的意义了。直接看凝视吧，写的非常具体的，
<?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" xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-3.0.xsd"><!-- 引入属性文件 --><context:property-placeholder location="classpath:config.properties" /><!-- 自己主动扫描dao和service包(自己主动注入) --><context:component-scan base-package="com.phn.dao,com.phn.service" /></beans>
继续建spring-hibernate.xml，相同凝视也都比較具体了，大家细致看是能够看懂的。
<?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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-3.0.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-3.0.xsd"><!-- JNDI(通过Tomcat)方式配置数据源 --><!-- <bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean"> <property name="jndiName" value="${jndiName}"></property> </bean> --><!-- 配置数据源 --><bean name="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close"><property name="url" value="${jdbc_url}" /><property name="username" value="${jdbc_username}" /><property name="password" value="${jdbc_password}" /><!-- 初始化连接大小 --><property name="initialSize" value="0" /><!-- 连接池最大使用连接数量 --><property name="maxActive" value="20" /><!-- 连接池最大空暇 --><property name="maxIdle" value="20" /><!-- 连接池最小空暇 --><property name="minIdle" value="0" /><!-- 获取连接最大等待时间 --><property name="maxWait" value="60000" /><!-- <property name="poolPreparedStatements" value="true" /> <property name="maxPoolPreparedStatementPerConnectionSize" value="33" /> --><property name="validationQuery" value="${validationQuery}" /><property name="testOnBorrow" value="false" /><property name="testOnReturn" value="false" /><property name="testWhileIdle" value="true" /><!-- 配置间隔多久才进行一次检測，检測须要关闭的空暇连接，单位是毫秒 --><property name="timeBetweenEvictionRunsMillis" value="60000" /><!-- 配置一个连接在池中最小生存的时间。单位是毫秒 --><property name="minEvictableIdleTimeMillis" value="25200000" /><!-- 打开removeAbandoned功能 --><property name="removeAbandoned" value="true" /><!-- 1800秒。也就是30分钟 --><property name="removeAbandonedTimeout" value="1800" /><!-- 关闭abanded连接时输出错误日志 --><property name="logAbandoned" value="true" /><!-- 监控数据库 --><!-- <property name="filters" value="stat" /> --><property name="filters" value="mergeStat" /></bean><!-- 配置hibernate session工厂 --><bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"><property name="dataSource" ref="dataSource" /><property name="hibernateProperties"><props><prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop><prop key="hibernate.dialect">${hibernate.dialect}</prop><prop key="hibernate.show_sql">${hibernate.show_sql}</prop><prop key="hibernate.format_sql">${hibernate.format_sql}</prop></props></property><!-- 自己主动扫描注解方式配置的hibernate类文件 --><property name="packagesToScan"><list><value>com.phn.model</value></list></property></bean><!-- 配置事务管理器 --><bean name="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager"><property name="sessionFactory" ref="sessionFactory"></property></bean><!-- 注解方式配置事物 --><!-- <tx:annotation-driven transaction-manager="transactionManager" /> --><!-- 拦截器方式配置事物 --><tx:advice id="transactionAdvice" transaction-manager="transactionManager"><tx:attributes><tx:method name="add*" /><tx:method name="save*" /><tx:method name="update*" /><tx:method name="modify*" /><tx:method name="edit*" /><tx:method name="delete*" /><tx:method name="remove*" /><tx:method name="repair" /><tx:method name="deleteAndRepair" /><tx:method name="get*" propagation="SUPPORTS" /><tx:method name="find*" propagation="SUPPORTS" /><tx:method name="load*" propagation="SUPPORTS" /><tx:method name="search*" propagation="SUPPORTS" /><tx:method name="datagrid*" propagation="SUPPORTS" /><!-- 这里是针对我写的推断用户是否存在数据库的方法的事务，假设不配置的话就会出现no session异常 --><tx:method name="is*" /><tx:method name="*" propagation="SUPPORTS" /></tx:attributes></tx:advice><aop:config><aop:pointcut id="transactionPointcut" expression="execution(* com.phn.service..*Impl.*(..))" /><aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" /></aop:config></beans>
继续建spring-mvc.xml，这里也不讲了哈，感觉没什么讲的，哈哈，有几个须要注意的地方最后讲，先把项目搭起来再说。
<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-3.0.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-3.1.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"><!-- 注解扫描包 --><context:component-scan base-package="com.phn.controller" /><!-- <context:component-scan /> --><!-- 扫描指定的包中的类上的注解，经常使用的注解有： --><!-- @Controller 声明Action组件 --><!-- @Service 声明Service组件 @Service("xxxService") --><!-- @Repository 声明Dao组件 --><!-- @Component 泛指组件, 当不好归类时. --><!-- @RequestMapping("/menu") 请求映射 --><!-- @Resource 用于注入。( j2ee提供的 ) 默认按名称装配。@Resource(name="beanName") --><!-- @Autowired 用于注入。(spring提供的) 默认按类型装配 --><!-- @Transactional( rollbackFor={Exception.class}) 事务管理 --><!-- @ResponseBody将内容或对象作为 HTTP 响应正文返回。并调用适合HttpMessageConverter的Adapter转换对象，写入输出流 --><!-- @Scope("prototype") 设定bean的作用域 --><!-- 开启MVC注解,表示SpringMVC支持注解功能 做了非常多事情，不包含加入自定义的拦截器 --><mvc:annotation-driven /><!-- 拦截器 --><!-- <mvc:interceptors> <bean class="com.phn.inteceptor" /> </mvc:interceptors> --><!-- 方案一 （二选一）表示不正确静态资源如CSS、JS、HTML等进行拦截 --><!-- 当在web.xml 中 DispatcherServlet使用 <url-pattern>/</url-pattern> 映射时，能映射静态资源,使用默认的servlet来响应请求 --><!-- <mvc:default-servlet-handler /> --><!-- 方案二 （二选一） 静态资源映射 --><mvc:resources mapping="/images/**" location="/WEB-INF/images/" /><mvc:resources mapping="/css/**" location="/WEB-INF/css/" /><mvc:resources mapping="/js/**" location="/WEB-INF/js/" /><mvc:resources mapping="/html/**" location="/WEB-INF/html/" /><beanclass="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"><property name="messageConverters"><list><beanclass="org.springframework.http.converter.StringHttpMessageConverter"><property name="supportedMediaTypes"><list><value>text/plain;charset=UTF-8</value></list></property></bean></list></property></bean><!-- 启动Spring MVC的注解功能，完毕请求和注解POJO的映射 --><beanclass="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter"><property name="messageConverters"><list><beanclass="org.springframework.http.converter.StringHttpMessageConverter"><property name="supportedMediaTypes"><list><value>text/plain;charset=UTF-8</value></list></property></bean><beanclass="org.springframework.http.converter.json.MappingJacksonHttpMessageConverter"><property name="supportedMediaTypes"><list><value>application/json;charset=UTF-8</value></list></property></bean></list></property></bean></beans>
到这里配置的已经差点儿相同了，接下来開始编写server端的代码。
记得先建立一个数据库哈，这个不要忘记了，我建的是phn命名的数据库。大家先依照我对包命名的方式对自己的项目建好响应的包吧。这样高速好继续一下步骤。
先从实体開始吧。在model包中建一个UserEntity类，代码例如以下。这里使用了Java JPA，已经在Spring-Hibernate.xml里面配置了能够自己主动生成数据库表的对应代码了。
package com.phn.model;import javax.persistence.Column;import javax.persistence.Entity;import javax.persistence.GeneratedValue;import javax.persistence.GenerationType;import javax.persistence.Id;import javax.persistence.Table;/*** @author phn*/@Table(name="t_user")@Entitypublic class UserEntity {private int id;private String username;private String password;private boolean sex; // 默觉得0。0表示男，1表示女@Id@GeneratedValue(strategy = GenerationType.IDENTITY)@Column(name = "UID", nullable = false, length = 9)public int getId() {return id;}public void setId(int id) {this.id = id;}@Column(name = "UNAME", nullable = false, length = 20)public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}@Column(name = "UPASSWORD", nullable = false, length = 32)public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}@Column(name = "USEX", nullable = false, length = 1)public boolean isSex() {return sex;}public void setSex(boolean sex) {this.sex = sex;}@Overridepublic String toString() {return "User [ \nid : " + this.id + "\nusername : " + this.username+ "\npassword : " + this.password + "\nsex : " + this.sex+ " ]";}}
接着開始编写数据訪问层（DAO层）接口。新建IUserDao接口。加入一下代码，这里就写了一个方法推断用户是否存在，用来验证用户登录。
package com.phn.dao;import com.phn.model.UserEntity;/*** @author phn*/public interface IUserDao {public boolean isExist(UserEntity user);}
继续编写数据訪问层（DAO层）的实现类UserDaoImpl类，依赖注入使用的是@Resource注解，还能够用@Autowired注解的。这里先不解释。后面再解释，继续我们项目的搭建。
package com.phn.dao.impl;import javax.annotation.Resource;import org.hibernate.Query;import org.hibernate.Session;import org.hibernate.SessionFactory;import org.springframework.stereotype.Repository;import com.phn.dao.IUserDao;import com.phn.model.UserEntity;/*** @author phn*/@Repository("userDao")public class UserDaoImpl implements IUserDao {@Resourceprotected SessionFactory sessionFactory;public Session getSession() {return sessionFactory.getCurrentSession();}public void setSessionFactory(SessionFactory sessionFactory) {this.sessionFactory = sessionFactory;}@Overridepublic boolean isExist(UserEntity user) {Session session = this.getSession();String hql = "from UserEntity where username =?and password = ?";Query query = session.createQuery(hql);query.setString(0, user.getUsername());query.setString(1, user.getPassword());if (query.list().size() >= 1) {return true;}return false;}}
数据訪问层编写完了。我们測试看看方法能够用不咯建一个UserDaoTest測试类，注意放在test资源包以下哈，代码例如以下，这里关于Junit+Spring測试使用注解引入单个和多个文件的差别留着后面讲，哈哈，是不是好多坑了。没事，等会一个一个填。我们先把项目弄好跑起来。最后来研究细节，这是我的学习方法，个人认为要是整了半天最后弄不好不就白干了。哈哈，不说多了，继续，
package com.phn.dao;import javax.annotation.Resource;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import org.springframework.test.context.transaction.TransactionConfiguration;import org.springframework.transaction.annotation.Transactional;import com.phn.model.UserEntity;@ContextConfiguration(locations = {"classpath:spring.xml","classpath:spring-hibernate.xml"})@RunWith(SpringJUnit4ClassRunner.class)// defaultRollback=true不会改变数据库，false会改变数据库@TransactionConfiguration(transactionManager = "transactionManager", defaultRollback = true)@Transactionalpublic class UserDaoTest {@Resourceprivate IUserDao userDao;@Testpublic void testIsExist() {UserEntity user = new UserEntity();user.setUsername("phn");user.setPassword("123456");boolean result = userDao.isExist(user);System.out.println(result);}}
測试结果应该是对的吧。不正确的话赶紧从前面開始看看什么地方错了，改正一下继续。看我的測试结果
继续编写业务逻辑层（Service层）接口。新建IUserService接口。代码例如以下，
package com.phn.service;import com.phn.model.UserEntity;/*** @author phn*/public interface IUserService {public boolean isExist(UserEntity user);}
继续编写业务逻辑层（Service层）实现类UserServiceImpl类，这里使用了@Transactional事务标签。不能少的哈。不多说，还是后面解释。
package com.phn.service.impl;import javax.annotation.Resource;import org.springframework.stereotype.Service;import org.springframework.transaction.annotation.Transactional;import com.phn.dao.IUserDao;import com.phn.model.UserEntity;import com.phn.service.IUserService;/*** @author phn*/@Transactional@Service("userService")public class UserServiceImpl implements IUserService {@Resourceprivate IUserDao userDao;@Overridepublic boolean isExist(UserEntity user) {return userDao.isExist(user);}}
业务逻辑层也ok了。我们測试一下，相同建一个UserServiceTest測试类，代码例如以下。事实上和dao层的代码差点儿相同，就是一些细节须要注意一下的话，后面讲，继续
package com.phn.service;import javax.annotation.Resource;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.test.context.ContextConfiguration;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import com.phn.model.UserEntity;@ContextConfiguration(locations= {"classpath:spring.xml","classpath:spring-hibernate.xml"})@RunWith(SpringJUnit4ClassRunner.class)public class UserServiceTest {@Resourceprivate IUserService userService;@Testpublic void testIsExist(){UserEntity user = new UserEntity();user.setUsername("phn");user.setPassword("123456");boolean result = userService.isExist(user);System.out.println(result);}}
相同測试结果应该是对的吧，不正确的话赶紧从前面開始看看什么地方错了，改正一下继续，我的測试结果例如以下
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以下就開始控制层（Controller层或者又叫Action层）的编码，新建一个UserController类。代码例如以下
package com.phn.controller;import java.util.HashMap;import java.util.Map;import javax.annotation.Resource;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import org.springframework.web.bind.annotation.ResponseBody;import com.phn.model.UserEntity;import com.phn.service.IUserService;/*** @author phn*/@Controller@RequestMapping("/user")public class UserController{@Resourceprivate IUserService userService;@ResponseBody@RequestMapping(value="/login", method = RequestMethod.POST)public Map<String,Object> login( UserEntity user){Map<String,Object> map = new HashMap<String,Object>();System.out.println(user.toString());boolean loginResult = userService.isExist(user);map.put("loginResult", loginResult);return map;}}
好啦，控制层写好了，以下測试，怎么測试呢。须要前台了，哈哈，ok，開始看看我的项目的webapp目录——————————————————————
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——————————————————————-建一个jsp。弄个简单的Ajax提交。通过传输Json数据来进行交互，这里是不是有点高大上。哈哈。前后端分离的路啊。不扯这个了，博主自己还不是非常熟悉前后端分离的思想呢，慢慢来吧，少年。路还长着呢
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme() + "://"+ request.getServerName() + ":" + request.getServerPort()+ path + "/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><base href="<%=basePath%>"><title>登录</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"><meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"><link rel="stylesheet" type="text/css" href="<%=basePath%>css/login.css"><script type="text/javascript" src="<%=basePath%>js/jquery-1.8.2.min.js"></script><script type="text/javascript" src="<%=basePath%>js/md5.js"></script><script type="text/javascript" src="<%=basePath%>js/login.js"></script></head><body><div>UserName:<input type="text" name="username" /> <br/>PassWord:<input type="password" name="password" /><br/><input type="submit" id="loginBtn" value="Login" /></div></body></html>
继续建一个js文件，login.js，代码例如以下。看到里面是不是进行了md5加密呀，这个是一个非常easy的东西，你们能够不用那个md5加密，相信这个操作你们还是会的吧，就是去掉hex_md5($("input[name=password]").val());外面的那个hex_md5()就ok了，继续没有了呢
$(function() {$("#loginBtn").click(function() {console.log("login");var username = $("input[name=username]").val();var password = hex_md5($("input[name=password]").val());var user = {"username" : username,"password" : password};$.ajax({type : "post",dataType : "json",data : user,contentType : "application/x-www-form-urlencoded;charset=UTF-8",url : "user/login",// 同步async: false,（默认是true）;// 如上：false为同步，这种方法中的Ajax请求将整个浏览器锁死，// 仅仅有test.jsp运行结束后，才干够运行其他操作。async : false,success : function(data) {if (false == data.loginResult) {alert("用户名或者密码错误，请又一次登录！");} else if (true == data.loginResult) {alert("登录成功！");var indexUrl = window.location.protocol+"//"+window.location.host+window.location.pathname+"html/index.html";window.location = indexUrl;}},error : function() {alert("server发生问题。请尝试又一次登录！");}});});});
另一个登录成功的页面。index.html,代码例如以下
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><title>欢迎页面</title><meta http-equiv="pragma" content="no-cache"><meta http-equiv="cache-control" content="no-cache"><meta http-equiv="expires" content="0"><meta http-equiv="keywords" content="keyword1,keyword2,keyword3"><meta http-equiv="description" content="This is my page"></head><body>恭喜你。登录成功！</body></html>
好了，把项目部署到tomcat上面去，试试看———————————————————————————- 
————————————————————————————输入phn，123456。看看測试结果，————————————————————————————– 
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奥，显示以下这个呢。是什么原因呢？嘿嘿。这是我用了md5加密，后台是直接将md5加密的字符串存在数据库中的。可是我前面在数据库直接使用的password是123456，所以在前台输入123456经过加密后的就不正确了。看以下，这是后台打印的东西，
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相应数据库中的数据是这种
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所以才会报错嘛，你看我试试输入username123和password123。结果就对了，例如以下————————————————————————————-
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好啦，项目搭建就成功了。这里就到此为止了。睡觉。剩下的坑就明天再填啦，记得再来哦。欢迎大家一起讨论哦源代码在GitHub上地址：https://github.com/panhainan/PHN
