Spring Boot2 + Mybatis 整合(Mybatis自动生成插件、分页插件)
内容：
Spring Boot2 + Mybatis 整合
Mybatis Generator自动生成代码
Mybatis PageHelper分页插件
创建maven项目
修改pom.xml 注意springboot、druid、pageHelper的版本号
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xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation=
"http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0
modelVersion>
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<groupId>com.sid
groupId>
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<artifactId>springboot
artifactId>
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<version>1.0-SNAPSHOT
version>
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<packaging>jar
packaging>
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-
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<parent>
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<groupId>org.springframework.boot
groupId>
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<artifactId>spring-boot-starter-parent
artifactId>
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<version>2.0.5.RELEASE
version>
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<relativePath/>
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parent>
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-
<properties>
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<project.build.sourceEncoding>UTF-8
project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8
project.reporting.outputEncoding>
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<java.version>1.8
java.version>
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properties>
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-
<dependencies>
-
-
<dependency>
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<groupId>org.springframework.boot
groupId>
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<artifactId>spring-boot-starter-web
artifactId>
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dependency>
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<dependency>
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<groupId>org.springframework.boot
groupId>
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<artifactId>spring-boot-starter-test
artifactId>
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<scope>test
scope>
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dependency>
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<dependency>
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<groupId>org.apache.commons
groupId>
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<artifactId>commons-lang3
artifactId>
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<version>3.4
version>
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dependency>
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-
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<dependency>
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<groupId>org.mybatis.spring.boot
groupId>
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<artifactId>mybatis-spring-boot-starter
artifactId>
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<version>1.3.2
version>
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dependency>
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<dependency>
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<groupId>mysql
groupId>
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<artifactId>mysql-connector-java
artifactId>
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<version>5.1.38
version>
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dependency>
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-
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<dependency>
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<groupId>com.alibaba
groupId>
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<artifactId>druid-spring-boot-starter
artifactId>
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<version>1.1.9
version>
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dependency>
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-
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<dependency>
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<groupId>com.github.pagehelper
groupId>
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<artifactId>pagehelper-spring-boot-starter
artifactId>
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<version>1.2.5
version>
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dependency>
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-
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dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.springframework.boot
groupId>
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<artifactId>spring-boot-maven-plugin
artifactId>
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plugin>
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-
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<plugin>
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<groupId>org.mybatis.generator
groupId>
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<artifactId>mybatis-generator-maven-plugin
artifactId>
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<version>1.3.2
version>
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<configuration>
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<configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml
configurationFile>
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<overwrite>true
overwrite>
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<verbose>true
verbose>
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configuration>
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plugin>
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-
plugins>
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build>
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-
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project>
创建启动类App.java
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package com.sid;
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import org.mybatis.spring.annotation.MapperScan;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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@SpringBootApplication
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@MapperScan(
"com.sid.mapper")
//将项目中对应的mapper类的路径加进来就可以了
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public
class App {
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public static void main(String[] args) {
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SpringApplication.run(App.class, args);
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}
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}
创建application.yml
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server:
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port: 8088
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servlet:
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context-path: /sid
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spring:
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mvc:
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view:
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prefix: /
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suffix: .html
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datasource:
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url: jdbc:mysql://localhost:3306/sid
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username: root
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password: root
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# 使用druid数据源
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type: com.alibaba.druid.pool.DruidDataSource
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driver-class-name: com.mysql.jdbc.Driver
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-
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## 该配置节点为独立的节点，不是在在spring的节点下
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mybatis:
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mapper-locations: classpath:mapping/*.xml
#注意：一定要对应mapper映射xml文件的所在路径
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type-aliases-package: com.sid.model
# 注意：对应实体类的路径
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configuration:
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log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
#控制台打印sql
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#pagehelper分页插件
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pagehelper:
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helperDialect: mysql
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reasonable:
true
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supportMethodsArguments:
true
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params: count=countSql
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在resources/generator下创建文件generatorConfig.xml
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xml version="1.0" encoding="UTF-8"?>
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PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN"
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"http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
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<generatorConfiguration>
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<classPathEntry location="F:\MySQL\Connector.J 5.1\mysql-connector-java-5.1.38-bin.jar"/>
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<context id="DB2Tables" targetRuntime="MyBatis3">
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<commentGenerator>
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<property name="suppressDate" value="true"/>
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<property name="suppressAllComments" value="true"/>
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commentGenerator>
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<jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/sid" userId="root" password="root">
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jdbcConnection>
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<javaTypeResolver>
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<property name="forceBigDecimals" value="false"/>
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javaTypeResolver>
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<javaModelGenerator targetPackage="com.sid.model" targetProject="src/main/java">
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<property name="enableSubPackages" value="true"/>
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<property name="trimStrings" value="true"/>
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javaModelGenerator>
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<sqlMapGenerator targetPackage="mapping" targetProject="src/main/resources">
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<property name="enableSubPackages" value="true"/>
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sqlMapGenerator>
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<javaClientGenerator type="XMLMAPPER" targetPackage="com.sid.mapper" targetProject="src/main/java">
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<property name="enableSubPackages" value="true"/>
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javaClientGenerator>
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<table tableName="user" domainObjectName="User" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false">
table>
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context>
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generatorConfiguration>
项目目录
数据库中的表
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CREATE
TABLE
`user` (
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`id`
bigint(
32)
NOT
NULL
COMMENT
'用户ID',
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`name`
varchar(
30)
NOT
NULL
COMMENT
'用户名',
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`password`
varchar(
30)
NOT
NULL
COMMENT
'密码',
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`mobile_phone`
varchar(
20)
NOT
NULL
COMMENT
'手机号',
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PRIMARY
KEY (
`id`)
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)
ENGINE=
InnoDB
DEFAULT
CHARSET=utf8;
mybatis自动生成代码的插件使用方式
run
然会就会自动生成UserMapper.xml、 User.java 、UserMapper.java
UserController.java
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package com.sid.controller;
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import com.github.pagehelper.PageInfo;
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import com.sid.model.User;
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import com.sid.service.UserService;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Controller;
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import org.springframework.web.bind.annotation.RequestMapping;
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import org.springframework.web.bind.annotation.ResponseBody;
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@Controller
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@RequestMapping(value =
"/user")
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public
class UserController {
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@Autowired
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private UserService userService;
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@ResponseBody
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@RequestMapping(value =
"/add")
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public int addUser(User user){
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return userService.addUser(user);
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}
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@ResponseBody
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@RequestMapping(value =
"/delete")
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public int deleteUser(String id){
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return userService.deleteUser(id);
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}
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@ResponseBody
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@RequestMapping(value =
"/update")
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public int updateUser(User user){
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return userService.updateUser(user);
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}
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@ResponseBody
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@RequestMapping(value =
"/selectAll")
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public PageInfo
selectAll(int pageNum, int pageSize) {
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return userService.selectAll( pageNum, pageSize);
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}
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}
UserService.java
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package com.sid.service;
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import com.github.pagehelper.PageInfo;
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import com.sid.model.User;
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public
interface UserService {
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int addUser(User user);
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int deleteUser(String id);
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int updateUser(User user);
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/*
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* pageNum 开始页数
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* pageSize 每页显示的数据条数
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* */
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PageInfo
selectAll(int pageNum, int pageSize) ;
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}
UserServiceImpl.java
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package com.sid.service.impl;
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import com.github.pagehelper.PageHelper;
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import com.github.pagehelper.PageInfo;
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import com.sid.mapper.UserMapper;
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import com.sid.model.User;
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import com.sid.service.UserService;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import java.util.List;
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@Service(value =
"userService")
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public
class UserServiceImpl implements UserService {
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@Autowired
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private UserMapper userMapper;
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@Override
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public int addUser(User user) {
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return userMapper.insertSelective(user);
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}
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@Override
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public int deleteUser(String id) {
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return userMapper.deleteByPrimaryKey(id);
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}
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@Override
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public int updateUser(User user) {
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return userMapper.updateByPrimaryKey(user);
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}
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/*
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* pageNum 开始页数
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* pageSize 每页显示的数据条数
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* */
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@Override
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public PageInfo
selectAll(int pageNum, int pageSize) {
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PageHelper.startPage(pageNum, pageSize,
"id desc");
//开始起始页
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List
userList = userMapper.selectAll();
// 获取数据
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PageInfo
page =
new PageInfo<>(userList);
// 实例化PageInfo
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return page;
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}
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}
UserMapper.java
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package com.sid.mapper;
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import com.sid.model.User;
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import org.springframework.stereotype.Component;
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import java.util.List;
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@Component
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public
interface UserMapper {
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int deleteByPrimaryKey(String id);
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int insert(User record);
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int insertSelective(User record);
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User selectByPrimaryKey(String id);
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int updateByPrimaryKeySelective(User record);
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int updateByPrimaryKey(User record);
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-
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List
selectAll() ;
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}
UserMapping.xml
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xml version="1.0" encoding="UTF-8" ?>
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<mapper namespace="com.sid.mapper.UserMapper" >
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<resultMap id="BaseResultMap" type="com.sid.model.User" >
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<id column="id" property="id" jdbcType="BIGINT" />
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<result column="name" property="name" jdbcType="VARCHAR" />
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<result column="password" property="password" jdbcType="VARCHAR" />
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<result column="mobile_phone" property="mobilePhone" jdbcType="VARCHAR" />
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resultMap>
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<sql id="Base_Column_List" >
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id, name, password, mobile_phone
-
sql>
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<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Long" >
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select
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<include refid="Base_Column_List" />
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from user
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where id = #{id,jdbcType=BIGINT}
-
select>
-
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<select id="selectAll" resultMap="BaseResultMap" >
-
select
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<include refid="Base_Column_List" />
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from user
-
select>
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<delete id="deleteByPrimaryKey" parameterType="java.lang.Long" >
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delete from user
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where id = #{id,jdbcType=BIGINT}
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delete>
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<insert id="insert" parameterType="com.sid.model.User" >
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insert into user (id, name, password,
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mobile_phone)
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values (#{id,jdbcType=BIGINT}, #{name,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR},
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#{mobilePhone,jdbcType=VARCHAR})
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insert>
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<insert id="insertSelective" parameterType="com.sid.model.User" >
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insert into user
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<trim prefix="(" suffix=")" suffixOverrides="," >
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<if test="id != null" >
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id,
-
if>
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<if test="name != null" >
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name,
-
if>
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<if test="password != null" >
-
password,
-
if>
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<if test="mobilePhone != null" >
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mobile_phone,
-
if>
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trim>
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<trim prefix="values (" suffix=")" suffixOverrides="," >
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<if test="id != null" >
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#{id,jdbcType=BIGINT},
-
if>
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<if test="name != null" >
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#{name,jdbcType=VARCHAR},
-
if>
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<if test="password != null" >
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#{password,jdbcType=VARCHAR},
-
if>
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<if test="mobilePhone != null" >
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#{mobilePhone,jdbcType=VARCHAR},
-
if>
-
trim>
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insert>
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<update id="updateByPrimaryKeySelective" parameterType="com.sid.model.User" >
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update user
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<set >
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<if test="name != null" >
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name = #{name,jdbcType=VARCHAR},
-
if>
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<if test="password != null" >
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password = #{password,jdbcType=VARCHAR},
-
if>
-
<if test="mobilePhone != null" >
-
mobile_phone = #{mobilePhone,jdbcType=VARCHAR},
-
if>
-
set>
-
where id = #{id,jdbcType=BIGINT}
-
update>
-
<update id="updateByPrimaryKey" parameterType="com.sid.model.User" >
-
update user
-
set name = #{name,jdbcType=VARCHAR},
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password = #{password,jdbcType=VARCHAR},
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mobile_phone = #{mobilePhone,jdbcType=VARCHAR}
-
where id = #{id,jdbcType=BIGINT}
-
update>
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mapper>
User.java
-
package com.sid.model;
-
-
public
class User {
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private Long id;
-
-
private String name;
-
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private String password;
-
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private String mobilePhone;
-
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public Long getId() {
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return id;
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}
-
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public void setId(Long id) {
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this.id = id;
-
}
-
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public String getName() {
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return name;
-
}
-
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public void setName(String name) {
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this.name = name ==
null ?
null : name.trim();
-
}
-
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public String getPassword() {
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return password;
-
}
-
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public void setPassword(String password) {
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this.password = password ==
null ?
null : password.trim();
-
}
-
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public String getMobilePhone() {
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return mobilePhone;
-
}
-
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public void setMobilePhone(String mobilePhone) {
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this.mobilePhone = mobilePhone ==
null ?
null : mobilePhone.trim();
-
}
-
}
添加11条数据到数据库中
查询
结果
打开mybatis执行的SQL打印会在后台看见
还是执行了一次select count(0)
