Spring+SprinMVC+MyBatis配置方式简易模板代码Demo GitHub访问 ssm-tpl-cfg

一、SQL数据准备

创建数据库test，执行下方SQL创建表ssm-tpl-cfg

/*
 Navicat Premium Data Transfer

 Source Server         : 127.0.0.1
 Source Server Type    : MySQL
 Source Server Version : 80030
 Source Host           : 127.0.0.1:3306
 Source Schema         : test

 Target Server Type    : MySQL
 Target Server Version : 80030
 File Encoding         : 65001

 Date: 17/10/2022 00:52:07
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for ssm-tpl-cfg
-- ----------------------------
DROP TABLE IF EXISTS `ssm-tpl-cfg`;
CREATE TABLE `ssm-tpl-cfg` (
  `id` bigint NOT NULL COMMENT '主键编号',
  `name` varchar(255) COLLATE utf8mb4_general_ci DEFAULT NULL COMMENT '测试名称',
  PRIMARY KEY (`id`)
) COMMENT '初始SSM表结构数据' ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;

-- ----------------------------
-- Records of ssm-tpl-cfg
-- ----------------------------
BEGIN;
INSERT INTO `ssm-tpl-cfg` (`id`, `name`) VALUES (2210162246100000, '王飞飞');
INSERT INTO `ssm-tpl-cfg` (`id`, `name`) VALUES (2210162257100000, '练卓神');
COMMIT;

SET FOREIGN_KEY_CHECKS = 1;

二、代码实现

2.1 pom.xml

<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.tpl.ssm.cfg</groupId>
    <artifactId>ssm-tpl-cfg</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>war</packaging>

    <properties>
        <spring_version>5.1.18.RELEASE</spring_version>
        <jackson_version>2.9.7</jackson_version>
    </properties>

    <dependencies>
        <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>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-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>${spring_version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring_version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>${spring_version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring_version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-messaging</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-tx</artifactId>
            <version>${spring_version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring_version}</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus</artifactId>
            <version>3.4.2</version>
        </dependency>
        <dependency>
            <groupId>com.baomidou</groupId>
            <artifactId>mybatis-plus-annotation</artifactId>
            <version>3.4.2</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.11</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.2.16</version>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.5</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.15.2</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.15.2</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.15.2</version>
        </dependency>
        <dependency>
            <groupId>log4j</groupId>
            <artifactId>log4j</artifactId>
            <version>1.2.17</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>2.0.7</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-log4j12</artifactId>
            <version>1.7.36</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.7.0</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>2.7.0</version>
        </dependency>
        <dependency>
            <groupId>taglibs</groupId>
            <artifactId>standard</artifactId>
            <version>1.1.2</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.2</version>
        </dependency>
        <dependency>
            <groupId>commons-lang</groupId>
            <artifactId>commons-lang</artifactId>
            <version>2.6</version>
        </dependency>
        <dependency>
            <groupId>commons-collections</groupId>
            <artifactId>commons-collections</artifactId>
            <version>3.2.2</version>
        </dependency>
        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId>
            <version>1.9.4</version>
        </dependency>
        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>commons-pool</groupId>
            <artifactId>commons-pool</artifactId>
            <version>1.6</version>
        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.4</version>
        </dependency>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.11.0</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjrt</artifactId>
            <version>1.9.7</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.7</version>
        </dependency>
        <dependency>
            <groupId>com.google.code.findbugs</groupId>
            <artifactId>annotations</artifactId>
            <version>2.0.0</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.13.2</version>
            <scope>test</scope>
        </dependency>
    </dependencies>
</project>

2.2 web.xml

<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://xmlns.jcp.org/xml/ns/javaee"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee
         http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">

    <!-- 加载Spring的配置文件 -->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:config/applicationContext.xml</param-value>
    </context-param>

    <!-- 配置Spring监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- 配置SpringMvc前端控制器 -->
    <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:config/spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>springmvc</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

    <!-- 配置编码过滤器 -->
    <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>
        <init-param>
            <param-name>characterEncodingFilter</param-name>
            <param-value>true</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>characterEncodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

2.3 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:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd

      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
      http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!-- 加载数据库属性文件 -->
    <context:property-placeholder location="classpath:config/db.properties"/>

    <!-- 配置数据库连接池 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource" init-method="init" destroy-method="close">
        <!-- 四大连接参数 -->
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <!-- 连接池配置信息 -->
        <property name="initialSize" value="${jdbc.initialSize}"/>
        <property name="minIdle" value="${jdbc.minIdle}"/>
        <property name="maxActive" value="${jdbc.maxActive}"/>
        <property name="maxWait" value="${jdbc.maxWait}"/>
        <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，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="300000" />
        <!-- Druid用来测试连接是否可用的SQL语句,默认值每种数据库都不相同-->
        <property name="validationQuery" value="SELECT 'x'" />
        <!-- 指明连接是否被空闲连接回收器(如果有)进行检验.如果检测失败,则连接将被从池中去除. -->
        <property name="testWhileIdle" value="true" />
        <!-- 指明是否在从池中取出连接前进行检验,如果检验失败,则从池中去除连接并尝试取出另一个 -->
        <property name="testOnBorrow" value="false" />
        <!-- 指明是否在归还到池中前进行检验 -->
        <property name="testOnReturn" value="false" />
        <!-- 配置监控统计拦截的filters -->
        <property name="filters" value="wall,stat" />
    </bean>

    <!-- 配置sessionFactory -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <!-- 注入数据源 -->
        <property name="dataSource" ref="dataSource"/>
        <!-- mapper文件位置 -->
        <property name="mapperLocations" value="classpath:mapper/*DAO.xml"/>
        <!-- mybatis核心配置文件位置 -->
        <property name="configLocation" value="classpath:config/mybatis-config.xml"/>
    </bean>

    <!-- 配置扫描mapper生成代理对象 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.tpl.ssm.cfg.dao"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>

    <!-- 扫描service -->
    <context:component-scan base-package="com.tpl.ssm.cfg.service"/>

    <!-- 配置事务管理器 -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- 开启注解事务 -->
    <tx:annotation-driven transaction-manager="transactionManager"/>
</beans>

2.4 springmvc配置文件

<?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:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 开启springMVC注解驱动 -->
    <mvc:annotation-driven/>
    <context:component-scan base-package="com.tpl.ssm.cfg.controller"/>

    <!-- 配置SpringMVC视图解析器 -->
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/pages/"/>
        <property name="suffix" value=".jsp"/>
    </bean>

    <!-- 释放静态资源文件 -->
    <mvc:resources mapping="/js/" location="/js/**"/>
    <mvc:resources mapping="/css/" location="/css/**"/>
    <mvc:resources mapping="/images/" location="/images/**"/>

    <!-- 配置文件上传解析器 -->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
        <property name="maxUploadSize" value="20971520"/>
        <property name="defaultEncoding" value="UTF-8"/>
    </bean>
</beans>

2.5 mybatis配置文件

<?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>

    <!-- 配置信息 -->
    <settings>
        <!-- 映射下划线到驼峰命名 -->
        <setting name="mapUnderscoreToCamelCase" value="true"/>
        <!-- 配置开启二级缓存 -->
        <setting name="cacheEnabled" value="true"/>
        <!-- 开启控制台打印SQL -->
        <setting name="logImpl" value="STDOUT_LOGGING"/>
    </settings>

    <!-- 别名 -->
    <typeAliases>
        <package name="com.tpl.ssm.cfg.entity"/>
    </typeAliases>
</configuration>

2.6 数据库连接信息

# 连接数据库的url地址
jdbc.url=jdbc:mysql://127.0.0.1:3306/test?useUnicode=true&characterEncoding=UTF-8
# 加载的类的驱动
jdbc.driverClassName=com.mysql.cj.jdbc.Driver
# 数据库用户名
jdbc.username=root
jdbc.password=root

# 初始化连接大小
jdbc.initialSize=10
# 连接池最大使用连接数量
jdbc.maxActive=500
# 连接池最小空闲
jdbc.minIdle=10
# 获取连接最大等待时间
jdbc.maxWait=60000

2.7 Entity

package com.tpl.ssm.cfg.entity;

import com.baomidou.mybatisplus.annotation.TableField;
import com.fasterxml.jackson.annotation.JsonIgnore;

import java.util.LinkedHashMap;
import java.util.Map;

/**
 * 测试实体
 */
public class TestEntity {

    /**
     * 主键编号
     */
    private Long id;

    /**
     * 测试名称
     */
    private String name;

    /**
     * 扩展字段
     */
    @JsonIgnore
    @TableField(exist = false)
    private Map<String, Object> ext = new LinkedHashMap<>(5);

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Map<String, Object> getExt() {
        return ext;
    }

    public void setExt(Map<String, Object> ext) {
        this.ext = ext;
    }
}

2.8 Controller

package com.tpl.ssm.cfg.controller;

import com.tpl.ssm.cfg.entity.TestEntity;
import com.tpl.ssm.cfg.service.TestService;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import java.util.List;

/**
 * 1. Spring5.1.x -> jackson2.9.x
 * 2.The origin server did not find a current representation for the target resource
 * 原因是WEB-INF只能转发进去, 重定向是进不去的
 */
@Controller
@RequestMapping("/test")
public class TestController {

    private final TestService testService;

    public TestController(TestService testService) {
        this.testService = testService;
    }

    @GetMapping("/")
    public String listTests(TestEntity test, Model model) {
        List<TestEntity> tests = testService.listTests(test);
        model.addAttribute("tests", tests);
        return "test";
    }

    @PostMapping("/save")
    public String saveTest(TestEntity test) {
        testService.saveTest(test);
        return "redirect:/test/";
    }

    @PostMapping("/modify")
    public String modifyTest(TestEntity test) {
        testService.modifyTest(test);
        return "redirect:/test/";
    }

    @RequestMapping("/remove")
    public String removeTest(TestEntity test) {
        testService.removeTest(test);
        return "redirect:/test/";
    }

}

2.9 Service

package com.tpl.ssm.cfg.service;

import com.tpl.ssm.cfg.entity.TestEntity;

import java.util.List;

public interface TestService {

    /**
     * 测试集
     *
     * @param cond 查询条件
     * @return 测试集
     */
    public List<TestEntity> listTests(TestEntity cond);

    /**
     * 单一测试实体
     *
     * @param cond 查询条件
     * @return 测试实体
     */
    public TestEntity singleTest(TestEntity cond);

    /**
     * 新增测试记录
     *
     * @param cond 查询条件
     * @return 受影响的条数
     */
    public boolean saveTest(TestEntity cond);

    /**
     * @param cond 查询条件
     * @return 受影响的条数
     */
    public boolean modifyTest(TestEntity cond);

    /**
     * 删除一条测试记录
     *
     * @param cond 查询条件
     * @return 受影响的条数
     */
    public boolean removeTest(TestEntity cond);

    /**
     * 删除多条测试记录
     *
     * @param testIds 测试实体主键集
     * @return 受影响的条数
     */
    public boolean removeTests(List<Long> testIds);

}

package com.tpl.ssm.cfg.service.impl;

import com.tpl.ssm.cfg.dao.TestDAO;
import com.tpl.ssm.cfg.entity.TestEntity;
import com.tpl.ssm.cfg.service.TestService;
import com.tpl.ssm.cfg.util.MajorKeyUtil;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class TestServiceImpl implements TestService {

    private final TestDAO testDAO;

    public TestServiceImpl(TestDAO testDAO) {
        this.testDAO = testDAO;
    }

    @Override
    public List<TestEntity> listTests(TestEntity cond) {
        return testDAO.listTests(cond);
    }

    @Override
    public TestEntity singleTest(TestEntity cond) {
        return testDAO.singleTest(cond);
    }

    @Override
    public boolean saveTest(TestEntity cond) {
        cond.setId(MajorKeyUtil.idSeq());
        return testDAO.insertTest(cond) > 0;
    }

    @Override
    public boolean modifyTest(TestEntity cond) {
        return testDAO.updateTest(cond) > 0;
    }

    @Override
    public boolean removeTest(TestEntity cond) {
        return testDAO.deleteTest(cond) > 0;
    }

    @Override
    public boolean removeTests(List<Long> testIds) {
        return testDAO.deleteTests(testIds) > 0;
    }
}

2.10 DAO

package com.tpl.ssm.cfg.dao;

import com.tpl.ssm.cfg.entity.TestEntity;

import java.util.List;

/**
 * 测试DAO
 * <p>
 * 1.查询测试记录列表 - listTests
 * 2.查询单个测试记录 - singleTest
 * 3.新增测试记录 - insertTest
 * 4.修改测试记录 - updateTest
 * 5.删除测试记录 - deleteTest
 * 6.根据主键集删除测试记录 - deleteTests
 */
public interface TestDAO {

    /**
     * 测试集
     *
     * @param cond 查询条件
     * @return 测试集
     */
    public List<TestEntity> listTests(TestEntity cond);

    /**
     * 单一测试实体
     *
     * @param cond 查询条件
     * @return 测试实体
     */
    public TestEntity singleTest(TestEntity cond);

    /**
     * 新增测试记录
     *
     * @param cond 查询条件
     * @return 受影响的条数
     */
    public int insertTest(TestEntity cond);

    /**
     * @param cond 查询条件
     * @return 受影响的条数
     */
    public int updateTest(TestEntity cond);

    /**
     * 删除一条测试记录
     *
     * @param cond 查询条件
     * @return 受影响的条数
     */
    public int deleteTest(TestEntity cond);

    /**
     * 删除多条测试记录
     *
     * @param testIds 测试实体主键集
     * @return 受影响的条数
     */
    public int deleteTests(List<Long> testIds);

}

<?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.tpl.ssm.cfg.dao.TestDAO">

    <!-- 基础查询 sql 片段 -->
    <sql id="baseSelect">
        SELECT id, name
    </sql>

    <!-- 基础查询 where 片段 -->
    <sql id="baseWhere">
        <if test="id != null">
            AND id = #{id}
        </if>
        <if test="name != null and name != ''">
            AND name like CONCAT('%', #{name})
        </if>
    </sql>

    <!-- 查询测试记录列表 -->
    <select id="listTests" parameterType="com.tpl.ssm.cfg.entity.TestEntity" resultType="com.tpl.ssm.cfg.entity.TestEntity">
        <include refid="baseSelect"/>
        FROM `ssm-tpl-cfg`
        WHERE
        1 = 1
        <include refid="baseWhere"/>
    </select>

    <!-- 查询单个测试记录 -->
    <select id="singleTest" parameterType="com.tpl.ssm.cfg.entity.TestEntity" resultType="com.tpl.ssm.cfg.entity.TestEntity">
        <include refid="baseSelect"/>
        FROM `ssm-tpl-cfg`
        WHERE
        1 = 1
        <include refid="baseWhere"/>
        limit 1
    </select>

    <!-- 新增测试记录 -->
    <insert id="insertTest" parameterType="com.tpl.ssm.cfg.entity.TestEntity">
        INSERT INTO `ssm-tpl-cfg`(id, name)
        VALUES (#{id}, #{name})
    </insert>

    <!-- 修改测试记录 -->
    <update id="updateTest" parameterType="com.tpl.ssm.cfg.entity.TestEntity">
        UPDATE `ssm-tpl-cfg`
        SET
        <if test="name != null and name != ''">
            name = #{name}
        </if>
        WHERE id = #{id}
    </update>

    <!-- 删除测试记录 -->
    <delete id="deleteTest" parameterType="com.tpl.ssm.cfg.entity.TestEntity">
        DELETE
        FROM `ssm-tpl-cfg`
        WHERE 1 = 1
        <include refid="baseWhere"/>
    </delete>

    <!-- 根据主键集删除测试记录 -->
    <delete id="deleteTests" parameterType="long">
        DELETE
        FROM `ssm-tpl-cfg`
        WHERE id in
        <foreach collection="item" open="(" separator="," close=")">
            #{item}
        </foreach>
    </delete>
</mapper>

2.11 MajorKeyUtil

package com.tpl.ssm.cfg.util;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.concurrent.atomic.AtomicInteger;

/**
 * 主键生成器
 * <p>
 * https://blog.csdn.net/weixin_42871989/article/details/100133736
 * 本类用于获取mysql全局自增主键，格式为
 * 时间戳(yyMMddHHmm) + 5 位自增，自增范围根据配置获取(也可以加上秒yyMMddHHmmss)
 */
public class MajorKeyUtil {

    private static final DateFormat df = new SimpleDateFormat("yyMMddHHmm");//主键时间戳
    private static final int MAX_SEQ = 0; // 计数位最大值
    private static final int RESET_SEQ = 99999; //计数位重置初始值(可以自行设置)
    private static final AtomicInteger seq = new AtomicInteger(RESET_SEQ); //计数器


    /**
     * 生成全局自增主键,字符串类型
     *
     * @return 生成的主键
     */
    public static String getSeq() {
        seq.compareAndSet(MAX_SEQ, RESET_SEQ); //判断是否进行重置
        return df.format(new Date()) + String.format("%05d", seq.incrementAndGet());
    }

    /**
     * 生成全局自增主键,long类型
     *
     * @return 生成的主键
     */
    public static Long idSeq() {
        String str = getSeq();
        return Long.parseLong(str);
    }

}

2.12 webapps/pages/test.jsp

<%--
  Created by IntelliJ IDEA.
  User: wangfeihu
  Date: 2022/10/16
  Time: 18:35
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<html>
<head>
    <title>CRUD TEST</title>
</head>
<body>
<table>
    <c:forEach items="${tests}" var="test">
        <tr>
            <td>${test.id}</td>
            <td>${test.name}</td>
            <td>
                <button onclick="let modifyForms = document.getElementsByName('modifyForm'); modifyForms.forEach(item => item.style.display = 'none'); document.getElementById('form${test.id}').style.display = 'inline'">修改</button>
                <button onclick="location.href='${pageContext.request.contextPath}/test/remove?id=${test.id}'">删除</button>
            </td>
            <td>
                <form id="form${test.id}" name="modifyForm" action="${pageContext.request.contextPath}/test/modify" method="post" style="display: none">
                    <input hidden name="id" value="${test.id}">
                    <input name="name" value="${test.name}">
                    <button type="submit">确认修改</button>
                </form>
            </td>
        </tr>
    </c:forEach>
</table>

<form action="${pageContext.request.contextPath}/test/save" method="post">
    <label>
        <input name="name" id="name" placeholder="请输入测试名称~">
    </label>
    <button type="submit">提交</button>
</form>
</body>
</html>

2.13 配置项目访问路径

在这里插入图片描述

三、访问测试

访问 http://127.0.0.1:8080/ssm_tpl_cfg/test/

在这里插入图片描述

一个简易基于配置的增删改查就实现了

# spring # mybatis # 数据库
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