idea使用Maven搭建ssm框架，实现增删改查

川长思鸟来 2022-11-29 13:08 360阅读 0赞

> 本文介绍在idea中使用Maven搭建SSM框架，实现对一个学生实体类的CRUD操作。  
>   
> 运行环境：MySQL 8.0.21 + JDK 11 + idea 2020  
> 框架版本：Spring 5.2.7.RELEASE + MyBatis 3.5.4  
> 构建工具：Maven 3.6.2

### 文章目录 ###

*  项目结构一览
 *  1 创建工程骨架
 *   *  1.1 使用maven的webapp模板创建一个web项目
     *  1.2 在pom.xml中添加依赖
     *  1.3 创建/src/test、/src/main/java目录
     *  1.4 创建数据库、添加表
 *  2 完善工程
 *   *  2.1 创建三层架构
     *   *  2.1.1 实体类domain/Student.java
         *  2.1.2 业务层
         *   *  2.1.2.1 service/StudentService.java
             *  2.1.2.2 service/impl/StudentServiceImpl.java
             *  2.1.2.3 controller/StudentController.java
         *  2.1.3 持久层dao/StudentMapper.java
         *  2.1.4 表现层
         *   *  2.1.4.1 webapp/index.jsp
             *  2.1.4.2 webapp/WEB-INF/pages/students/findAll.jsp
     *  2.2 创建配置文件
     *   *  2.2.1 数据库配置文件resources/config/jdbcConfig.properties
         *  2.2.2 Spring配置文件resources/config/applicationContext.xml
         *  2.2.3 日志文件resources/config/log4j.properties（这个可不加）
         *  2.2.4 mybatis配置文件resources/config/mybatis-config.xml
         *  2.2.5 SpringMVC配置文件resources/config/springmvc.xml
         *  2.2.6 映射文件resources/mapper/StudentMapper.xml
         *  2.2.7 全局配置文件webapp/WEB-INF/web.xml
 *  3 运行测试
 *  4 junit测试CRUD

# 项目结构一览 #

G:\PROGRAMFILES\WORKSPACE\IDEA\SSM-DEMO\SRC
    ├───main
    │   ├───java
    │   │   └───com
    │   │       └───fanyi
    │   │           ├───controller
    │   │           │       HelloController.java
    │   │           │       StudentController.java
    │   │           │
    │   │           ├───dao
    │   │           │       StudentMapper.java
    │   │           │
    │   │           ├───domain
    │   │           │       Student.java
    │   │           │
    │   │           └───service
    │   │               │   StudentService.java
    │   │               │
    │   │               └───impl
    │   │                       StudentServiceImpl.java
    │   │
    │   ├───resources
    │   │   ├───config
    │   │   │       applicationContext.xml
    │   │   │       jdbcConfig.properties
    │   │   │       log4j.properties
    │   │   │       mybatis-config.xml
    │   │   │       springmvc.xml
    │   │   │
    │   │   └───mapper
    │   │           StudentMapper.xml
    │   │
    │   └───webapp
    │       │   index.jsp
    │       │
    │       └───WEB-INF
    │           │   web.xml
    │           │
    │           └───pages
    │               │   welcome.jsp
    │               │
    │               └───students
    │                       findAll.jsp
    │
    └───test
        └───java
            └───com
                └───fanyi
                    ├───dao
                    │       StudentMapperTest.java
                    │
                    └───service
                            StudentServiceTest.java

# 1 创建工程骨架 #

## 1.1 使用maven的webapp模板创建一个web项目 ##

创建项目时选择maven，勾选webapp模板即可

## 1.2 在pom.xml中添加依赖 ##

<?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/maven-v4_0_0.xsd">
    
        <modelVersion>4.0.0</modelVersion>
        <packaging>war</packaging>
    
        <name>ssm-demo</name>
        <groupId>org.example</groupId>
        <artifactId>ssm-demo</artifactId>
        <version>${spring.version}1.0-SNAPSHOT</version>
    
        <properties>
        	
            <spring.version>5.2.7.RELEASE</spring.version>
            <mybatis.version>3.5.4</mybatis.version>
            <slf4j.version>1.7.30</slf4j.version>
            <log4j2.version>2.13.3</log4j2.version>
            <mysql.version>8.0.20</mysql.version>
    
    		
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
            <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
            
            
            <java.version>11</java.version>
            <maven.compiler.source>11</maven.compiler.source>
            <maven.compiler.target>11</maven.compiler.target>
        </properties>
    
        <dependencies>
            
            <dependency>
                <groupId>org.aspectj</groupId>
                <artifactId>aspectjweaver</artifactId>
                <version>1.9.5</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-aop</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-tx</artifactId>
                <version>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-test</artifactId>
                <version>${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>${spring.version}</version>
            </dependency>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-webmvc</artifactId>
                <version>${spring.version}</version>
            </dependency>
    
            
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.13</version>
                <scope>test</scope>
            </dependency>
    
            
            <dependency>
                <groupId>javax.servlet</groupId>
                <artifactId>servlet-api</artifactId>
                <version>2.5</version>
            </dependency>
            <dependency>
                <groupId>javax.servlet.jsp</groupId>
                <artifactId>jsp-api</artifactId>
                <version>2.1</version>
            </dependency>
            <dependency>
                <groupId>jstl</groupId>
                <artifactId>jstl</artifactId>
                <version>1.2</version>
            </dependency>
    
            
            <dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-api</artifactId>
                <version>${log4j2.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-core</artifactId>
                <version>${log4j2.version}</version>
            </dependency>
            <dependency>
                <groupId>org.apache.logging.log4j</groupId>
                <artifactId>log4j-web</artifactId>
                <version>${log4j2.version}</version>
            </dependency>
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-api</artifactId>
                <version>${slf4j.version}</version>
            </dependency>
            
            
            
            
            <dependency>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-nop</artifactId>
                <version>1.6.4</version>
            </dependency>
    
            
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis</artifactId>
                <version>${mybatis.version}</version>
            </dependency>
            <dependency>
                <groupId>org.mybatis</groupId>
                <artifactId>mybatis-spring</artifactId>
                <version>2.0.4</version>
            </dependency>
            <dependency>
                <groupId>mysql</groupId>
                <artifactId>mysql-connector-java</artifactId>
                <version>${mysql.version}</version>
            </dependency>
    
            
            <dependency>
                <groupId>com.alibaba</groupId>
                <artifactId>druid</artifactId>
                <version>1.1.10</version>
            </dependency>
    
            <dependency>
                <groupId>org.projectlombok</groupId>
                <artifactId>lombok</artifactId>
                <version>1.18.12</version>
            </dependency>
        </dependencies>
    </project>

## 1.3 创建/src/test、/src/main/java目录 ##

/src/test：用户后续测试使用。**鼠标放在test目录，单击右键，Mark Directory as →Test Sources Root**  
/src/main/java：存放项目源代码。**鼠标放在java目录，单击右键，Mark Directory as →Sources Root**  
……  
项目中若缺少其它文件夹，设置方式类似

## 1.4 创建数据库、添加表 ##

-- MySQL dump 10.13  Distrib 8.0.21, for Win64 (x86_64)
    --
    -- Host: localhost    Database: spring
    -- ------------------------------------------------------
    -- Server version	8.0.21
    
    /*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
    /*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
    /*!40101 SET @OLD_COLLATION_CONNECTION=@@COLLATION_CONNECTION */;
    /*!50503 SET NAMES utf8mb4 */;
    /*!40103 SET @OLD_TIME_ZONE=@@TIME_ZONE */;
    /*!40103 SET TIME_ZONE='+00:00' */;
    /*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
    /*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
    /*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
    /*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
    
    --
    -- Current Database: `spring`
    --
    
    CREATE DATABASE /*!32312 IF NOT EXISTS*/ `spring` /*!40100 DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci */ /*!80016 DEFAULT ENCRYPTION='N' */;
    
    USE `spring`;
    
    --
    -- Table structure for table `t_student`
    --
    
    DROP TABLE IF EXISTS `t_student`;
    /*!40101 SET @saved_cs_client     = @@character_set_client */;
    /*!50503 SET character_set_client = utf8mb4 */;
    CREATE TABLE `t_student` (
      `id` int NOT NULL AUTO_INCREMENT,
      `stu_name` varchar(30) DEFAULT NULL,
      `sex` char(1) DEFAULT NULL,
      `stu_address` varchar(30) DEFAULT NULL,
      PRIMARY KEY (`id`)
    ) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci;
    /*!40101 SET character_set_client = @saved_cs_client */;
    
    --
    -- Dumping data for table `t_student`
    --
    
    LOCK TABLES `t_student` WRITE;
    /*!40000 ALTER TABLE `t_student` DISABLE KEYS */;
    INSERT INTO `t_student` VALUES (1,'tom','f','shanghai'),(3,'lisa','m','tianjin'),(4,'george','f','hunan');
    /*!40000 ALTER TABLE `t_student` ENABLE KEYS */;
    UNLOCK TABLES;
    /*!40103 SET TIME_ZONE=@OLD_TIME_ZONE */;
    
    /*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
    /*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
    /*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
    /*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
    /*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
    /*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
    /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
    
    -- Dump completed on 2020-08-21 16:06:39

# 2 完善工程 #

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center]

## 2.1 创建三层架构 ##

先创建一个`com.xxx`包，再创建包`domain、controller、service、service.impl、dao`

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center 1]

### 2.1.1 实体类domain/Student.java ###

public class Student implements Serializable { 
        private int id;
        private String stuName;
        private char sex;
        private String stuAddress;
        
        // 省略getter、setter、toString方法
    }

### 2.1.2 业务层 ###

#### 2.1.2.1 service/StudentService.java ####

public interface StudentService { 
        /** * 查询所有学生 * * @return */
        List<Student> findAll();
    
        /** * 插入一条学生信息 * * @param student */
        void insert(Student student);
    
        /** * 更新一条学生信息 * * @param student */
        void update(Student student);
    
        /** * 根据学生id查询一条学生信息 * * @param id */
        Student selectById(int id);
    
        /** * 根据学生id删除一条学生信息 * * @param stuId */
        void deleteById(int stuId);
    }

#### 2.1.2.2 service/impl/StudentServiceImpl.java ####

@Service
    public class StudentServiceImpl implements StudentService { 
        @Autowired
        private StudentMapper studentMapper;
    
        @Override
        public List<Student> findAll() { 
           return studentMapper.findAll();
        }
    
        @Override
        public void insert(Student student) { 
            studentMapper.insert(student);
        }
    
        @Override
        public void update(Student student) { 
            studentMapper.update(student);
        }
    
        @Override
        public Student selectById(int id) { 
            return studentMapper.selectById(id);
        }
    
        @Override
        public void deleteById(int stuId) { 
            studentMapper.deleteById(stuId);
        }
    }

#### 2.1.2.3 controller/StudentController.java ####

@Controller
    @RequestMapping(value = "/student")
    public class StudentController { 
    
        @Autowired
        private StudentService studentService;
    
        @RequestMapping(value = "/findAll")
        public ModelAndView findAll(){ 
            List<Student> students = studentService.findAll();
            ModelAndView modelAndView = new ModelAndView();
            modelAndView.addObject("students", students);
            modelAndView.setViewName("students/findAll");
    
            return modelAndView;
        }
    }

### 2.1.3 持久层dao/StudentMapper.java ###

// @Repository
    public interface StudentMapper { 
        /** * 查询所有学生 * * @return */
        List<Student> findAll();
    
        /** * 插入一条学生信息 * * @param student */
        void insert(Student student);
    
        /** * 更新一条学生信息 * * @param student */
        void update(Student student);
    
        /** * 根据学生id查询一条学生信息 * * @param id */
        Student selectById(int id);
    
        /** * 根据学生id删除一条学生信息 * * @param stuId */
        void deleteById(int stuId);
    }

### 2.1.4 表现层 ###

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center 2]

#### 2.1.4.1 webapp/index.jsp ####

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
    <html>
    <head>
        <title>Title</title>
    </head>
    <body>
    Hello
    </body>
    </html>

#### 2.1.4.2 webapp/WEB-INF/pages/students/findAll.jsp ####

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <html>
    <head>
        <title>查看所有学生</title>
    </head>
    <body>
    <table border="1px solid black" cellspacing="0">
        <c:forEach var="stu" items="${students}">
            <tr>
                <td>${stu.id}</td>
                <td>${stu.stuName}</td>
                <td>${stu.sex}</td>
                <td>${stu.stuAddress}</td>
            </tr>
        </c:forEach>
    </table>
    </body>
    </html>

## 2.2 创建配置文件 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center 3]

### 2.2.1 数据库配置文件resources/config/jdbcConfig.properties ###

jdbc.driver=com.mysql.cj.jdbc.Driver
    jdbc.url=jdbc:mysql://localhost:3306/spring?serverTimezone=UTC&useSSL=false&allowPublicKeyRetrieval=true
    jdbc.username=xxx
    jdbc.password=xxx

### 2.2.2 Spring配置文件resources/config/applicationContext.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:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation=" http://www.springframework.org/schema/beans https://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop https://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx https://www.springframework.org/schema/tx/spring-tx.xsd">
    
        
        <context:component-scan base-package="com.fanyi.service"/>
    
        
        <bean class="org.springframework.context.support.PropertySourcesPlaceholderConfigurer">
            <property name="locations" value="classpath:config/jdbcConfig.properties"/>
        </bean>
        
        <bean id="druidDataSource" class="com.alibaba.druid.pool.DruidDataSource">
            <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>
    
        
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="druidDataSource"/>
            <property name="configLocation" value="classpath:config/mybatis-config.xml"/>
            <property name="mapperLocations" value="classpath:mapper/*.xml"/>
        </bean>
    
        
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            
            <property name="basePackage" value="com.fanyi.dao"/>
            <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
        </bean>
    </beans>

### 2.2.3 日志文件resources/config/log4j.properties（这个可不加） ###

log4j.rootLogger=debug,stdout,logfile
    log4j.appender.stdout=org.apache.log4j.ConsoleAppender
    log4j.appender.stdout.layout=org.apache.log4j.SimpleLayout
    
    log4j.logger.com.ibatis=DEBUG
    log4j.logger.com.ibatis.common.jdbc.SimpleDataSource=DEBUG
    log4j.logger.com.ibatis.common.jdbc.ScriptRunner=DEBUG
    log4j.logger.com.ibatis.sqlmap.engine.impl.SqlMapClientDelegate=DEBUG
    log4j.logger.Java.sql.Connection=DEBUG
    log4j.logger.java.sql.Statement=DEBUG
    log4j.logger.java.sql.PreparedStatement=DEBUG

### 2.2.4 mybatis配置文件resources/config/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>
        <properties resource="config/jdbcConfig.properties">
            
        </properties>
        <settings>
            <setting name="mapUnderscoreToCamelCase" value="true"/>
        </settings>
    
    
    
    </configuration>

### 2.2.5 SpringMVC配置文件resources/config/springmvc.xml ###

### 2.2.6 映射文件resources/mapper/StudentMapper.xml ###

<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
    <mapper namespace="com.fanyi.dao.StudentMapper">
        <select id="findAll" resultType="com.fanyi.domain.Student">
            select * from t_student
        </select>
    
        <select id="selectById" parameterType="int" resultType="com.fanyi.domain.Student">
            select * from t_student where id = #{id}
        </select>
    
        <insert id="insert" parameterType="com.fanyi.domain.Student" useGeneratedKeys="true" keyProperty="id">
            insert into t_student(stu_name, sex, stu_address) values(#{stuName}, #{sex}, #{stuAddress})
        </insert>
    
        <update id="update" parameterType="com.fanyi.domain.Student">
            update t_student set
                stu_name = #{stuName},
                sex = #{sex},
                stu_address = #{stuAddress}
            where id = #{id}
        </update>
    
        <delete id="deleteById" parameterType="int">
            delete from t_student where id = #{id}
        </delete>
    </mapper>

### 2.2.7 全局配置文件webapp/WEB-INF/web.xml ###

<?xml version="1.0" encoding="UTF-8"?>
    <web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    
        <welcome-file-list>
            <welcome-file>index.jsp</welcome-file>
        </welcome-file-list>
        
        
        <listener>
            <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
    
        
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:/config/applicationContext.xml</param-value>
        </context-param>
    
        
        <context-param>
            <param-name>log4jConfigurationLocation</param-name>
            <param-value>classpath:/config/log4j.properties</param-value>
        </context-param>
        <context-param>
            <param-name>log4jRefreshIntervel</param-name>
            <param-value>60000</param-value>
        </context-param>
        <listener>
            <listener-class>org.apache.logging.log4j.web.Log4jServletContextListener</listener-class>
        </listener>
        
        
        <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>
        </filter>
        <filter-mapping>
            <filter-name>characterEncodingFilter</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
    
        
        <servlet>
            <servlet-name>dispatcherServlet</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:/config/springmvc.xml</param-value>
            </init-param>
            
            <load-on-startup>1</load-on-startup>
        </servlet>
        <servlet-mapping>
            <servlet-name>dispatcherServlet</servlet-name>
            <url-pattern>/</url-pattern>
        </servlet-mapping>
        
        
    </web-app>

# 3 运行测试 #

将项目部署到tomcat，启动tomcat，浏览器地址栏输入如图所示url

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center 4]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center 5]  
![在这里插入图片描述][20200821164621496.png_pic_center]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center 6]

# 4 junit测试CRUD #

运行相应的测试方法即可

package com.fanyi.service;
    
    import com.fanyi.domain.Student;
    import com.fanyi.service.impl.StudentServiceImpl;
    import org.junit.Test;
    import org.junit.runner.RunWith;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.test.context.ContextConfiguration;
    import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
    
    import java.util.List;
    
    @RunWith(value = SpringJUnit4ClassRunner.class)
    @ContextConfiguration(locations = { "classpath:config/applicationContext.xml"})
    public class StudentServiceTest { 
    
        @Autowired
        private StudentService studentService;
    
        @Test
        public void findAll() { 
            List<Student> list = studentService.findAll();
            for (Student li : list) { 
                System.out.println(li);
            }
        }
    
        @Test
        public void insert() { 
            Student student = new Student();
            student.setStuAddress("BeiJing");
            student.setSex('f');
            student.setStuName("tom");
            studentService.insert(student);
        }
    
        @Test
        public void update() { 
            Student s = studentService.selectById(5);
            s.setStuName("update name");
            // 执行此句报错，加上useSSL=false
            studentService.update(s);
        }
    
        @Test
        public void selectById() { 
            System.out.println(studentService.selectById(3));
        }
    
        @Test
        public void deleteById() { 
            studentService.deleteById(5);
        }
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center]: /images/20221124/0e2726c02d684258bd2eeb50d274568c.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221124/b4c39c22c62c462897ac5e9b78089fc7.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center 2]: /images/20221124/04469a73d20a4ab2ab7765102a588a74.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center 3]: /images/20221124/6dcc2ecbe6df4ef38823a3c5dd0a6396.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center 4]: /images/20221124/c7918cbadbff4cebabb02bcf6d9eff8a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center 5]: /images/20221124/fe487b8332d642b6ba2dd1fb1cacf512.png
[20200821164621496.png_pic_center]: /images/20221124/7bf9af559d7b4313b84b5a6fd74b552a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center 6]: /images/20221124/7c913e9cf99a4f4892837f81b6cee7c7.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MjI1MDMwMg_size_16_color_FFFFFF_t_70_pic_center 7]: /images/20221124/a90937ffc7834492800ff1bd4e817231.png