一、配置maven的pom.xml加載jar包
為了后續(xù)開(kāi)發(fā)的方便，將SSM框架所有需要的jar包一并加載進(jìn)來(lái)
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pom.xml
<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>com.ustc.finance</groupId>
<artifactId>USTC</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>USTC Maven Webapp</name>
<url>http://maven.apache.org</url><properties> <!-- spring release number --> <spring.version>4.3.2.RELEASE</spring.version> <!-- log4j release number --> <slf4j.version>1.7.21</slf4j.version> <log4j.version>1.2.16</log4j.version> <!-- junit release number --> <junit.version>4.12</junit.version> <!-- mybatis release number --> <mybatis.version>3.4.1</mybatis.version> <!-- mybatis-spring release number --> <mybatis-spring.version>1.3.0</mybatis-spring.version> </properties> <dependencies> <!-- junit --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>${junit.version}</version> <scope>test</scope> </dependency> <!--mysql driver--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.38</version> </dependency> <!--jsp--> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>javax.servlet.jsp-api</artifactId> <version>2.3.1</version> </dependency> <!-- log management --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${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> <!-- mybatis --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>${mybatis.version}</version> </dependency> <!-- mybatis-spring dependency --> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis-spring</artifactId> <version>${mybatis-spring.version}</version> </dependency> <!-- spring dependency --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</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>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aop</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-aspects</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</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-web</artifactId> <version>${spring.version}</version> </dependency> <!-- spring unit test dependency --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> <scope>test</scope> </dependency> </dependencies> <build> <finalName>USTC</finalName> </build> </project>
配置好pom.xml之后右鍵單擊工程名：Runs As ->Maven Install 將這些jar包下載至之前配置好的本地倉(cāng)庫(kù)
二、創(chuàng)建實(shí)體類(lèi)
此處與Hibernate中實(shí)體類(lèi)相同，都是按照ORM思想將類(lèi)與數(shù)據(jù)庫(kù)中的表做一對(duì)一的映射，類(lèi)名與表名對(duì)應(yīng)、類(lèi)中 成員變量與表中字段名對(duì)應(yīng)、表中的一對(duì)多關(guān)系在類(lèi)中表現(xiàn)為組合關(guān)系（一對(duì)多時(shí)在類(lèi)中添加Set或者List集合，多對(duì)一時(shí)在類(lèi)中添加相應(yīng)的對(duì)象），如圖所示（User與StockComment就是一對(duì)多的關(guān)系）：
當(dāng)類(lèi)中存在TreeSet時(shí)需要實(shí)現(xiàn)Comparable接口并重寫(xiě)compareTo方法（方便TreeSet集合進(jìn)行排序）。之后自動(dòng)生成成員變量的Get和Set方法。
三、創(chuàng)建實(shí)體類(lèi)對(duì)應(yīng)的Dao
Dao中主要定義一些基本的數(shù)據(jù)庫(kù)訪問(wèn)操作如CRUD，此處注意Dao只是接口，而不是類(lèi)。而且在Mybati中Dao不需要用類(lèi)實(shí)現(xiàn)，而是通過(guò)配置映射文件Mapping.xml來(lái)實(shí)現(xiàn)Dao接口。
public interface UserDao {
/**
* Select from t_user by userID
* @param userID
* @return
*/
public User selectUserByID(int userID);
/**
* Select from t_user by userName
* @param userName
* @return
*/
public User selectUserByName(String userName);
/**
* Insert a record in t_user
* @param user
* @return
*/
public int addUser(User user);
/**
* Update a record in t_user
* @param user
* @return
*/
public int updateUser(User user);
/**
* Delete a record in t_user that dependents on the userID
* @param userID
* @return
*/
public int deleteUserByID(int userID);
}
四、配置Dao對(duì)應(yīng)的實(shí)現(xiàn)UserMapping.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.ustc.finance.dao.UserDao">
<resultMap type="com.ustc.finance.entity.User" id="userResultMap">
<id column="userID" jdbcType="INTEGER" property="userID"/>
<result column="userName" jdbcType="VARCHAR" property="userName"/>
<result column="userPassword" jdbcType="VARCHAR" property="userPassword"/>
<result column="userRealName" jdbcType="VARCHAR" property="userRealName"/>
<result column="userEmail" jdbcType="VARCHAR" property="userEmail"/>
<result column="userGender" jdbcType="VARCHAR" property="userGender"/>
<result column="userFinance" jdbcType="DOUBLE" property="userFinance"/>
<!-- 個(gè)股評(píng)論的一對(duì)多的關(guān)系 -->
<!-- property: 指的是集合屬性的值, ofType：指的是集合中元素的類(lèi)型 -->
<collection property="stockComments" ofType="com.ustc.finance.entity.StockComment"
select="com.ustc.finance.dao.StockCommentDao.selectStockCommentByID" column="stockCommentID">
</collection>
<!-- 個(gè)股交易的一對(duì)多的關(guān)系 -->
<collection property="stockTransactions" ofType="com.ustc.finance.entity.StockTransaction"
select="com.ustc.finance.dao.StockTransactionDao.selectStockTransactionByID" column="stockTransactionID">
</collection>
</resultMap>
<!-- 查詢單條記錄 -->
<select id="selectUserByID" parameterType="int" resultMap="userResultMap">
SELECT * FROM t_user
<where>
<if test="_parameter !=null and _parameter != ''">
AND userID = #{userID, jdbcType = INTEGER}
</if>
</where>
</select>
<!-- 通過(guò)用戶名查詢 -->
<select id="selectUserByName" parameterType="java.lang.String" resultMap="userResultMap">
SELECT * FROM t_user
<where>
<if test="_parameter !=null and _parameter != ''">
AND userName = #{userName, jdbcType = VARCHAR}
</if>
</where>
</select>
<!-- 添加用戶記錄 -->
<insert id="addUser" parameterType="com.ustc.finance.entity.User" useGeneratedKeys="true" keyProperty="userID">
INSERT INTO t_user (userName, userPassword, userRealName, userPhone, userEmail, userGender, userFinance)
VALUES (#{userName}, #{userPassword}, #{userRealName}, #{userPhone}, #{userEmail}, #{userGender}, #{userFinance})
</insert>
<!-- 更新用戶記錄 -->
<update id="updateUser" parameterType="com.ustc.finance.entity.User">
UPDATE t_user SET userName = #{userName}, userPassword = #{userPassword},
userRealName = #{userRealName}, userPhone = #{userPhone}, userEmail = #{userEmail},
userGender = #{userGender}, userFinance = #{userFinance} WHERE userID = #{userID}
</update>
<!-- 刪除用戶記錄 -->
<delete id="deleteUserByID" parameterType="int">
DELETE FROM t_user WHERE userID = #{userID}
</delete>
</mapper>
- 在MyBatis中所有的數(shù)據(jù)庫(kù)訪問(wèn)操作都需要我們自己實(shí)現(xiàn)SQL，這樣就可以擁有更高的管理權(quán)限和更多的靈活性，可以精確地控制到每一次數(shù)據(jù)庫(kù)訪問(wèn)，減少不必要的依賴操作。
<resultMap>標(biāo)簽定義了查詢返回結(jié)果的存儲(chǔ)格式，一般情況下是為實(shí)體類(lèi)中的成員變量與數(shù)據(jù)庫(kù)表中的字段做對(duì)應(yīng)，其中column屬性的值是數(shù)據(jù)庫(kù)字段名，property的值是類(lèi)中對(duì)應(yīng)的成員變量名，resultMap中的id方便在下面進(jìn)行查詢時(shí)指明返回結(jié)果使用哪一個(gè)resultMap進(jìn)行存儲(chǔ)
當(dāng)使用MyBatis處理一對(duì)多關(guān)系時(shí)，首先在resultMap中聲明關(guān)系（一對(duì)多的關(guān)系使用collection 聲明，多對(duì)一的關(guān)系使用association聲明）如下：
<association property="user" javaType="com.ustc.finance.entity.User"
select="com.ustc.finance.dao.UserDao.selectUserByID" column="userID">
</association>首先說(shuō)明collection ：其中的property是指實(shí)體類(lèi)中的集合變量名（TreeSet），ofType指明集合變量（TreeSet）的類(lèi)型，select指明可以使用哪一個(gè)select語(yǔ)句查詢出關(guān)聯(lián)對(duì)象，column指明關(guān)聯(lián)對(duì)象的主鍵（這里填數(shù)據(jù)庫(kù)中的字段名）
然后說(shuō)明一下association：其實(shí)與collection 大同小異，只是ofType換成了javaType
這里需要額外說(shuō)明一下，在我的測(cè)試之下MyBatis不會(huì)自動(dòng)的幫你聯(lián)表查詢，想要實(shí)現(xiàn)聯(lián)表查詢的話要么在SQL中直接查兩個(gè)表，要么自己想一下替代的策略。我所使用的策略是：對(duì)于多對(duì)一關(guān)系，由于每個(gè)對(duì)象中只存放一條關(guān)聯(lián)數(shù)據(jù)（比如StockComment中只存放有一個(gè)User類(lèi)的對(duì)象），查詢起來(lái)比較方便，因此在StockComment的所有查詢SQL中一并將User查出來(lái)；對(duì)于一對(duì)多關(guān)系，由于每個(gè)對(duì)象中存放有多條關(guān)聯(lián)數(shù)據(jù)（比如User中存放了一個(gè)TreeSet類(lèi)型的StockComment，存放了一個(gè)對(duì)象集合），查詢起來(lái)過(guò)于復(fù)雜而且容易存在冗余查詢（即只需要User自身的信息，但關(guān)聯(lián)查詢出了多余的Stock信息），因此我在處理一對(duì)多關(guān)系時(shí)“一”的一方（User）只查詢自身表的內(nèi)容，“多”的一方（StockComment）增加根據(jù)userID查詢的接口
public TreeSet<StockComment> selectStockCommentByUserID(@Param("userID") int userID);
這樣當(dāng)需要查詢某個(gè)user對(duì)應(yīng)的stockComment時(shí)使用該方法就可以實(shí)現(xiàn)。然后說(shuō)明一下SQL標(biāo)簽<select>、<insert>、<update>、<delete>等，這些都大同小異。標(biāo)簽id要與Dao中的方法名對(duì)應(yīng)，parameterType指明Dao中方法參數(shù)的類(lèi)型，resultMap指明select語(yǔ)句返回查詢結(jié)果時(shí)以哪種格式存儲(chǔ)，useGeneratedKeys設(shè)置為true時(shí)指明數(shù)據(jù)庫(kù)中的主鍵是自增模式，并且在后面keyProperty指明主鍵名稱(chēng)
五、創(chuàng)建Dao對(duì)應(yīng)的Service
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UserService
package com.ustc.finance.service;
import com.ustc.finance.entity.User;
public interface UserService {
/**
* Select from t_user by userID
* @param userID
* @return
/
User selectUserByID(int userID);
/*
* Select from t_user by userName
* @param userName
* @return
/
User selectUserByName(String userName);
/*
* Checkout if the userName is available
* @param userName
* @return
/
Boolean checkUserName(String userName);
/*
* Checkout if the login action is success
* @param userName
* @param password
* @return
*/
Boolean loginCheck(String userName, String password);/** * Insert a record in t_user * @param user * @return */ int addUser(User user); /** * Update a record in t_user * @param user * @return */ int updateUser(User user); /** * Delete a record in t_user that dependents on the userID * @param userID * @return */ int deleteUserByID(int userID); } UserService與UserDao大同小異，主要是在UserDao的基礎(chǔ)上再定義一些針對(duì)項(xiàng)目所需要的接口如checkUserName與loginCheck
六、創(chuàng)建UserServiceImpl實(shí)現(xiàn)UserService接口
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UserServiceImpl
package com.ustc.finance.serviceimpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.ustc.finance.dao.UserDao;
import com.ustc.finance.entity.User;
import com.ustc.finance.service.UserService;
@Service("UserService")
public class UserServiceImpl implements UserService {@Autowired private UserDao userDao; @Override public User selectUserByID(int userID) { return userDao.selectUserByID(userID); } @Override public User selectUserByName(String userName) { return userDao.selectUserByName(userName); } @Override public Boolean checkUserName(String userName) { Boolean ret = false; User user = userDao.selectUserByName(userName); if(user != null) ret = false; else ret = true; return ret; } @Override public Boolean loginCheck(String userName, String password) { Boolean ret = false; User user = userDao.selectUserByName(userName); if(user == null) ret = false; else if(!(user.getUserPassword().equals(password))) ret = false; else ret = true; return ret; } @Override public int addUser(User user) { return userDao.addUser(user); } @Override public int updateUser(User user) { return userDao.updateUser(user); } @Override public int deleteUserByID(int userID) { return userDao.deleteUserByID(userID); } } 在類(lèi)上邊加Service注解標(biāo)注該類(lèi)實(shí)現(xiàn)的哪一個(gè)Service。然后使用注解Autowired自動(dòng)注入一個(gè)UserDao的對(duì)象。之后實(shí)現(xiàn)UserService接口中定義的方法。
七、MyBatis與Spring配置文件
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MyBatis配置文件mybatis-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd"><configuration> <!-- 開(kāi)啟延遲加載 --> <settings> <!-- lazyLoadingEnabled:延遲加載啟動(dòng)，默認(rèn)是false --> <setting name="lazyLoadingEnabled" value="false"/> <!-- aggressiveLazyLoading：積極的懶加載，false的話按需加載，默認(rèn)是true --> <setting name="aggressiveLazyLoading" value="false"/> </settings> </configuration> -
Spring配置文件spring.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"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd"><!-- 加載配置文件 --> <!-- 將多個(gè)配置文件讀取到容器中，交給Spring管理 --> <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>classpath:jdbc.properties</value> </list> </property> </bean> <!-- 自動(dòng)掃描dao和service包(自動(dòng)注入) --> <context:component-scan base-package="com.ustc.finance.serviceimpl" /> </beans> -
Spring與MyBatis整合配置文件spring-mybatis.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:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.3.xsd"><!-- 配置數(shù)據(jù)源 --> <bean name="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> <property name="driverClassName" value="${jdbc.driverClassName}"/> <property name="url" value="${jdbc.url}" /> <property name="username" value="${jdbc.username}" /> <property name="password" value="${jdbc.password}" /> </bean> <!-- 配置MyBatis session工廠 --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> <property name="dataSource" ref="dataSource" /> <!-- 加載全局的配置文件 --> <property name="configLocation" value="classpath:mybatis/mybatis-config.xml"></property> <!-- 自動(dòng)掃描mapping.xml文件 --> <property name="mapperLocations" value="classpath:com/ustc/finance/mapping/*.xml"></property> </bean> <!-- 自動(dòng)掃描了所有的XxxxMapper.xml對(duì)應(yīng)的mapper接口文件， 這樣就不用一個(gè)一個(gè)手動(dòng)配置Mpper的映射了，只要Mapper接口類(lèi)和Mapper映射文件對(duì)應(yīng)起來(lái)就可以了。 --> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer"> <property name="basePackage" value="com.ustc.finance.dao" /> <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property> </bean> <!-- (事務(wù)管理)transaction manager --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> <!-- 第一種方式: 注解方式配置事物 --> <!-- <tx:annotation-driven transaction-manager="transactionManager" /> --> <!-- 第二種方式: 攔截器方式配置事物 --> <tx:advice id="transactionAdvice" transaction-manager="transactionManager"> <tx:attributes> <tx:method name="add*" propagation="REQUIRED" rollback-for="java.lang.Exception"/> <tx:method name="update*" propagation="REQUIRED" rollback-for="java.lang.Exception"/> <tx:method name="delete*" propagation="REQUIRED" rollback-for="java.lang.Exception"/> <tx:method name="check*" propagation="SUPPORTS" rollback-for="java.lang.Exception"/> <tx:method name="login*" propagation="SUPPORTS" rollback-for="java.lang.Exception"/> <tx:method name="select*" propagation="SUPPORTS" rollback-for="java.lang.Exception"/> <tx:method name="find*" propagation="SUPPORTS" rollback-for="java.lang.Exception"/> <tx:method name="load*" propagation="SUPPORTS" rollback-for="java.lang.Exception"/> <tx:method name="search*" propagation="SUPPORTS" rollback-for="java.lang.Exception"/> <tx:method name="*" propagation="REQUIRED" rollback-for="java.lang.Exception"/> </tx:attributes> </tx:advice> <!-- Spring AOP config 解釋一下 (* com.evan.crm.service.*.*(..)) 中幾個(gè)通配符的含義： --> <!-- 第一個(gè) * —— 通配 任意返回值類(lèi)型 --> <!-- 第二個(gè) * —— 通配 包c(diǎn)om.evan.crm.service下的任意class --> <!-- 第三個(gè) * —— 通配包c(diǎn)om.evan.crm.service下的任意class的任意方法 --> <!-- 第四個(gè) .. —— 通配 方法可以有0個(gè)或多個(gè)參數(shù) --> <!-- 事務(wù)控制位置，一般在業(yè)務(wù)層service --> <aop:config> <aop:pointcut id="transactionPointcut" expression="execution(* com.ustc.finance.serviceimpl.*Impl.*(..))" /> <!-- 多個(gè) expression="(execution(* com.weixin.web.service..*Impl.*(..)))or(execution(* org.weixin.service..*Impl.*(..)))" --> <aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" /> </aop:config> </beans> 數(shù)據(jù)庫(kù)相關(guān)配置jdbc.properties
jdbc.driverClassName=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/ustc_finance?useUnicode=true&characterEncoding=UTF-8&useSSL=false
jdbc.username=root
jdbc.password=123456-
日志文件相關(guān)配置log4j.properties
log4j.rootLogger=DEBUG,Console,Stdout#Console log4j.appender.Console=org.apache.log4j.ConsoleAppender log4j.appender.Console.layout=org.apache.log4j.PatternLayout log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n log4j.logger.java.sql.ResultSet=INFO log4j.logger.org.apache=INFO log4j.logger.java.sql.Connection=DEBUG log4j.logger.java.sql.Statement=DEBUG log4j.logger.java.sql.PreparedStatement=DEBUG log4j.appender.Stdout = org.apache.log4j.DailyRollingFileAppender log4j.appender.Stdout.File = D\:\\Java\\MyEclipse2017\\MyEclipse\\JavaFiles\\USTC_Finance\\src\\main\\resources\\log\\log.log log4j.appender.Stdout.Append = true log4j.appender.Stdout.Threshold = DEBUG log4j.appender.Stdout.layout = org.apache.log4j.PatternLayout log4j.appender.Stdout.layout.ConversionPattern =%-d{yyyy-MM-dd HH\:mm\:ss} [ %t\:%r ] - [ %p ] %m%n
八、編寫(xiě)測(cè)試類(lèi)
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先創(chuàng)建一個(gè)測(cè)試基類(lèi)，配置一些東西方便以后的測(cè)試類(lèi)通用：
package MyBatisTest;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.AbstractJUnit4SpringContextTests;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;@ContextConfiguration(locations = {"classpath:spring.xml", "classpath:spring-mybatis.xml"}) @RunWith(SpringJUnit4ClassRunner.class) public abstract class BaseTest extends AbstractJUnit4SpringContextTests { } -
創(chuàng)建User測(cè)試類(lèi)
package MyBatisTest;
import org.apache.log4j.Logger;
import org.junit.Test;
import org.springframework.beans.factory.annotation.Autowired;
import com.ustc.finance.entity.User;
import com.ustc.finance.service.UserService;public class UserTest extends BaseTest { @Autowired private UserService userService; Logger logger = Logger.getLogger(UserTest.class); @Test public void selectByIdTest(){ User user = userService.selectUserByID(3); logger.debug("\n\n用戶查詢結(jié)果: " + user.getUserName()+user.getUserRealName()+"\n\n"); } @Test public void selectByNameTest(){ String userName = "aaa"; User user = userService.selectUserByName(userName); logger.debug("\n\n用戶查詢結(jié)果: " + user+"\n\n"); } @Test public void checkUserNameTest(){ String userName = "test"; Boolean result = userService.checkUserName(userName); if(result) logger.debug("\n\n用戶名校驗(yàn)結(jié)果: 該用戶名可以使用\n\n"); else logger.debug("\n\n用戶名校驗(yàn)結(jié)果: 該用戶名已被其他人使用\n\n"); } @Test public void loginCheckTest(){ Boolean result = userService.loginCheck("docki", "8888"); if(result) logger.debug("\n\n用戶登錄驗(yàn)證: 登錄成功\n\n"); else logger.debug("\n\n用戶登錄驗(yàn)證: 登錄失敗\n\n"); } } -
Autowired注解是Spring中的注解，用于自動(dòng)注入，當(dāng)程序運(yùn)行時(shí)需要用到userService時(shí)，Spring會(huì)幫我們自動(dòng)創(chuàng)建一個(gè)userService對(duì)象供我們使用。Test注解是Junit注解，用于標(biāo)注測(cè)試方法。logger.debug幫助我們打印測(cè)試方法的執(zhí)行結(jié)果。測(cè)試類(lèi)的運(yùn)行方法：選中需要運(yùn)行的測(cè)試方法名，右鍵->Run As ->Junit 。測(cè)試通過(guò)則證明項(xiàng)目后臺(tái)與數(shù)據(jù)庫(kù)已經(jīng)連通！
