版权声明：本文real_Rickys原创文章，未经real_Rickys允许不得转载。 https://blog.csdn.net/real_Rickys/article/details/82882178
Spring学习3（2）
业务层就就是将持久层的Dao组织起来，完成Dao所定义的各种操作。本例中只有一个业务层：UserService完成用户登录，密码认证和登录日志记录操作。
业务层
UserService
UserService有3个业务需要完成，分别是检验用户名和用户密码的正确性，以用户名为条件加载对象，以及用户登录成功后，更新最后的登陆时间和IP信息，同时记录用户登录日志。
在com.smart下创建service目录，在此目录下创建UserService.java，其中具体代码如下：
package com.smart.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.smart.dao.LoginLogDao;
import com.smart.dao.UserDao;
import com.smart.domain.LoginLog;
import com.smart.domain.User;
@Service
public class UserService{
private UserDao userDao;
private LoginLogDao loginLogDao;
@Autowired
public void setUserDao(UserDao userDao) {
this.userDao = userDao;
}
@Autowired
public void setLoginLogDao(LoginLogDao loginLogDao) {
this.loginLogDao = loginLogDao;
}
public boolean hasMatchUser(String userName, String password) {
int matchCount = userDao.getMatchCount(userName, password);
return matchCount>0;
}
public User findUserByUserName(String userName) {
return userDao.findUserByUserName(userName);
}
@Transactional
public void loginSuccess(User user) {
user.setCredits(user.getCredits() + 5);
LoginLog loginLog = new LoginLog();
loginLog.setUserId(user.getUserId());
loginLog.setIp(user.getLastIp());
loginLog.setLoginDate(user.getLastVisit());
userDao.updateLoginInfo(user);
loginLogDao.insertLoginLog(loginLog);
}
}
这里@Service是将UserService作为一个服务层的Bean，后面两个@Autowired是注入Dao层的Bean,@Transactional是事务注解，让该方法运行在事务环境从而更新表数据。
在Spring中装配Service
&mesp;在smart-context.xml文件中增加如下代码：
<context:component-scan base-package="com.smart.service"/>
<!--配置事务管理器 -->
<bean id="transcationManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
p:dataSource-ref="dataSource" />
<!-- 通过AOP配置提供事务增强，让Service包下所有Bean的方法拥有事务 -->
<aop:config proxy-target-class="true">
<aop:pointcut id="serviceMethod"
expression="(execution(* com.smart.service..*(..))) and
(@annotation(org.springframework.transaction.annotation.Transactional))" />
<aop:advisor pointcut-ref="serviceMethod" advice-ref="txAdvice"/>
</aop:config>
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="*" />
</tx:attributes>
</tx:advice>
- 首先将com.smart.service添加到上下文扫描路径
- 其次建立一个基于数据源的DataSourceTransactionManager事务管理器负责管理声明式事务管理。
- 最后通过aop和tx命名空间的语法，为service包下所有标注
@Transactional的注解方法都添加事务增强。
单元测试
然后这里单元测试坑了我两天，环境包互相冲突而且还解析不到，最后一怒之下全部删掉然后突然间，，就好了。下面还是给出书中的配置吧：
<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.smart</groupId>
<artifactId>chapter2</artifactId>
<version>1.0</version>
<name>Spring4.x第二章实例</name>
<description>Spring4.x第二章实例</description>
<dependencies>
<!-- spring 依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</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-context-support</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-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>${commons-dbcp.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>${servlet.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>${aspectj.version}</version>
</dependency>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>${testng.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<!-- jetty插件 -->
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>maven-jetty-plugin</artifactId>
<version>6.1.25</version>
<configuration>
<connectors>
<connector implementation="org.mortbay.jetty.nio.SelectChannelConnector">
<port>8000</port>
<maxIdleTime>60000</maxIdleTime>
</connector>
</connectors>
<contextPath>/bbs</contextPath>
<scanIntervalSeconds>0</scanIntervalSeconds>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.17</version>
<configuration>
<parallel>methods</parallel>
<threadCount>10</threadCount>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<file.encoding>UTF-8</file.encoding>
<spring.version>4.2.2.RELEASE</spring.version>
<mysql.version>5.1.29</mysql.version>
<servlet.version>3.0-alpha-1</servlet.version>
<aspectj.version>1.8.1</aspectj.version>
<commons-codec.version>1.9</commons-codec.version>
<commons-dbcp.version>1.4</commons-dbcp.version>
<hibernate.validator.version>5.0.2.Final</hibernate.validator.version>
<jetty.version>8.1.8.v20121106</jetty.version>
<slf4j.version>1.7.5</slf4j.version>
<testng.version>6.8.7</testng.version>
</properties>
</project>
那么首先在src/test/com/smart下创建service目录，而后在其中创建文件，名为UserServiceTest.java,代码如下：
package com.smart.service;
import java.util.Date;
import org.springframework.test.context.testng.AbstractTransactionalTestNGSpringContextTests;
import org.testng.annotations.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import com.smart.domain.User;
import static org.testng.Assert.*;
@ContextConfiguration("classpath*:/smart-context.xml")
public class UserServiceTest extends AbstractTransactionalTestNGSpringContextTests {
@Autowired
private UserService userService;
@Test
public void testHasMatchUser() {
boolean b1 = userService.hasMatchUser("admin", "123456");
boolean b2 = userService.hasMatchUser("admin", "1111");
assertTrue(b1);
assertTrue(!b2);
}
@Test
public void testFindUserByUserName()throws Exception{
for(int i =0; i< 100;i++) {
User user = userService.findUserByUserName("admin");
assertEquals(user.getUserName(), "admin");
}
}
@Test
public void testAddLoginLog() {
User user = userService.findUserByUserName("admin");
user.setUserId(1);
user.setUserName("admin");
user.setLastIp("192.168.12.7");
user.setLastVisit(new Date());
userService.loginSuccess(user);
}
}
一些解释：
AbstractTransactionalTestNGSpringContextTests是spring测试框架提供的基类，@contextConfiguration是spring提供的注解，用来确定spring的配置文件。@Autowired``是用来将spring容器中的Bean注入测试类中并在测试方法前使用TestNG的@Test```来注解为测试方法。- test的结果会在E:\work_java\chapter2\target\surefire-reports的testng-results.xml中