Integration of SSM

ssm Integration of , the truth is that spring and mybatis Integration of , hold mybatis The configuration in is consolidated into spring in spring Should be encapsulated in a corresponding class , To encapsulate mybatis These configurations

step ：

1. Create a maven-web engineering

Create good , Create your own java and resources

Be careful ： Be sure to replace web.xml file , The built-in version is too low

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
</web-app>

2. Add related dependencies

  <dependencies>
    <!--spring-webmvc-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>5.2.15.RELEASE</version>
    </dependency>

    <!--mybatis rely on -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>3.5.6</version>
    </dependency>

    <!--mybatis and spring Integration dependency -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>2.0.6</version>
    </dependency>

    <!--mysql drive -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>8.0.28</version>
    </dependency>

    <!--druid Connection pool dependency -->
    <dependency>
      <groupId>repMaven.com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.2.8</version>
    </dependency>

    <!--lombok rely on -->
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.24</version>
    </dependency>
    <!--jackson java Object to json object  @ResponseBody-->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.13.2.2</version>
    </dependency>
    <!--servlet-api rely on -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.1.0</version>
    </dependency>
    <dependency>
      <groupId>repMaven.org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>5.3.12</version>
    </dependency>
    <!-- Code generator -->
    <dependency>
      <groupId>org.mybatis.generator</groupId>
      <artifactId>mybatis-generator-core</artifactId>
      <version>1.4.1</version>
    </dependency>
<!-- Log generator -->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
    </dependency>
    <dependency>
      <groupId>repMaven.jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency>
      <groupId>org.projectlombok</groupId>
      <artifactId>lombok</artifactId>
      <version>1.18.24</version>
    </dependency>

  </dependencies>

3. To write spring Configuration file for

<!-- About springMVC Configuration of -->
    <!-- Package scanning -->
    <context:component-scan base-package="qy151.guan"/>
    <!-- Open the annotation -->
    <mvc:annotation-driven/>
    <!-- Release of static resources -->
    <mvc:default-servlet-handler/>
    <!-- Interceptor -->
    <mvc:interceptors>
        <mvc:interceptor>
            <mvc:mapping path="/**"/>
            <mvc:exclude-mapping path="/user"/>
<!--            <mvc:exclude-mapping path="/login.jsp"/>-->
            <mvc:exclude-mapping path="/css/**"/>
            <mvc:exclude-mapping path="/js/**"/>
            <bean class="qy151.guan.filter.Interceptor"/>
        </mvc:interceptor>
    </mvc:interceptors>
    <!-- About spring Configuration of -->
    <!-- Configuration of data source -->
    <bean id="ds" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/five?serverTimezone=Asia/Shanghai"/>
        <property name="username" value="root"/>
        <property name="password" value="grt081141"/>
        <!-- Initial value -->
        <property name="initialSize" value="5"/>
        <!-- minimum value -->
        <property name="minIdle" value="5"/>
        <!-- Maximum -->
        <property name="maxActive" value="10"/>
        <!-- Maximum waiting time -->
        <property name="maxWait" value="3000"/>
    </bean>
    <!--SqlSessionFactory Integration of -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- Be careful ref If the above data source configuration id Agreement -->
        <property name="dataSource" ref="ds"/>
        <!-- Set up mybatis Path to map file -->
     <property name="mapperLocations" value="classpath:mapper/*.xml"/>
    </bean>
    <!-- by dao Generate proxy class    basePackage： Package name --> 
   <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="qy151.guan.dao"/>
    </bean>

4. To configure web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"
         version="4.0">
<!-- Coding filter -->
  <filter>
    <filter-name>b</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>b</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

  <servlet>
    <servlet-name>spring</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <init-param>
      <param-name>contextConfigLocation</param-name>
      <param-value>classpath:spring.xml</param-value>
    </init-param>
    <!-- When Tomcat Startup time , establish DispatcherServlet Default controller Path time -->
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>spring</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

5.generator generator

        1. Introduce dependencies , If dependency is introduced , It seems that there is no need to introduce

         2. Import profile

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration
        PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
        "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">

<generatorConfiguration>
    <!-- Find yourself mysql affirmatory jar package -->
    <classPathEntry location="D:\mysql-connector-java-8.0.20.jar" />

    <context id="DB2Tables" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        <!-- Configuration information of data source -->
        <jdbcConnection driverClass="com.mysql.cj.jdbc.Driver"
                        connectionURL="jdbc:mysql://localhost:3306/five?serverTimezone=Asia/Shanghai
                                         &amp;characterEncoding=UTF-8&amp;nullCatalogMeansCurrent=true"
                        userId="root"
                        password="grt081141">
        </jdbcConnection>

        <javaTypeResolver >
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>
        <!-- Configuration of entity class 
        targetPackage： The name of the bag 
        targetProject： The path of the package 
        -->
        <javaModelGenerator targetPackage="qy151.guan.entity" targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>
        <!-- Mapping file configuration -->
        <sqlMapGenerator targetPackage="mapper"  targetProject=".\src\main\resources">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>
        <!--dao Configuration of data access layer -->
        <javaClientGenerator type="XMLMAPPER" targetPackage="qy151.guan.dao"  targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>
        <!-- Mapping relationship between database and entity class -->
        <table schema="five" tableName="student" domainObjectName="Student" enableUpdateByExample="false" enableSelectByExample="false" enableDeleteByExample="false" enableCountByExample="false">

        </table>

    </context>
</generatorConfiguration>

        3. test

package qy151.guan.Test;

import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

/**
 * TODO
 *
 * @author lenovo
 * @version 1.0
 * @since 2022-06-14  16:31:43
 */
public class GeneratorTest {
    public static void main(String[] args)throws Exception {
        List<String> warnings = new ArrayList<String>();
        boolean overwrite = true;
        <!-- To write yourself generator The name of the file -->
        File configFile = new File("generator02.xml");
        ConfigurationParser cp = new ConfigurationParser(warnings);
        Configuration config = cp.parseConfiguration(configFile);
        DefaultShellCallback callback = new DefaultShellCallback(overwrite);
        MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
        myBatisGenerator.generate(null);


    }
}

6. Code

Add, delete, modify and check the back-end code   controller

package qy151.guan.controllor;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import qy151.guan.entity.Student;
import qy151.guan.service.StudentService;
import qy151.guan.until.CommonResult;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.util.List;

/**
 * TODO
 *
 * @author lenovo
 * @version 1.0
 * @since 2022-06-14  20:34:20
 */

@RestController
public class StudentController {

    // Query all 
    @Autowired
    private StudentService studentService;
    @RequestMapping("student")
    public CommonResult all(){
        List<Student> all = studentService.All();
        return new CommonResult(2000," The query is successful ",all);
    }
    // according to id Inquire about 
    @Autowired
    private StudentService studentServiceId;
    @RequestMapping("studentId")
    public CommonResult getId(Integer id){
        int removeId = studentServiceId.removeId(id);
        return new CommonResult(2000," Delete successful ",null);
    }
    // modify 
    @Autowired
    private StudentService studentServiceUpdate;
    @RequestMapping("studentUpdate")
    public CommonResult update(Student row){
            int amend = studentServiceUpdate.update(row);
            return new CommonResult(2000," Modification successful ",null);
    }
    // add to 
    @Autowired
    private StudentService studentServiceAdd;
    @RequestMapping("studentAdd")
    public CommonResult addId(Student row){
        int add = studentServiceAdd.add(row);
        return new CommonResult(2000," Add success ",null);
    }
}

service

package qy151.guan.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import qy151.guan.dao.StudentMapper;
import qy151.guan.entity.Student;
import qy151.guan.service.StudentService;

import java.util.List;

/**
 * TODO
 *
 * @author lenovo
 * @version 1.0
 * @since 2022-06-14  20:28:55
 */
@Service
public class StudentServiceImpl implements StudentService {
    // Query all 
    @Autowired
    private StudentMapper studentMapper;
    public List<Student> All() {
        List<Student> students = studentMapper.queryAll();
        return students;
    }
    // Delete 
    @Autowired
    private StudentMapper studentMapperId;
    public int removeId(Integer id) {
        int i = studentMapperId.deleteByPrimaryKey(id);
        return i;
    }


    // modify 
    @Autowired
    private StudentMapper studentMapperUpdate;
    public int update(Student row) {
        int update = studentMapperUpdate.updateByPrimaryKeySelective(row);
        return update;
    }
    // add to 
    @Autowired
    private StudentMapper studentMapperAdd;
    public int add(Student row) {
        int add = studentMapperAdd.insertSelective(row);
        return add;
    }


}

package qy151.guan.service;

import qy151.guan.entity.Student;

import java.util.List;

/**
 * TODO
 *
 * @author lenovo
 * @version 1.0
 * @since 2022-06-14  20:25:40
 */
public interface StudentService {
    // Query all 
    public List<Student> All();
    // according to id Delete 
    public int removeId(Integer id);
    // modify 
    public int update(Student row);
    // add to 
    public int add(Student row);
}