从.Net到Java学习第三篇——spring boot+mybatis+mysql

-- ----------------------------
-- Table structure for `tb_area`
-- ----------------------------
DROP TABLE IF EXISTS `tb_area`;
CREATE TABLE `tb_area` (
  `area_id` int(2) NOT NULL AUTO_INCREMENT COMMENT ‘区域ID‘,
  `area_name` varchar(200) DEFAULT NULL COMMENT ‘区域名称‘,
  `priority` int(2) DEFAULT ‘0‘ COMMENT ‘优先级‘,
  `create_time` datetime DEFAULT NULL COMMENT ‘创建时间‘,
  `last_edit_time` datetime DEFAULT NULL COMMENT ‘修改时间‘,
  PRIMARY KEY (`area_id`),
  UNIQUE KEY `uk_area` (`area_name`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of tb_area
-- ----------------------------
INSERT INTO `tb_area` VALUES (‘1‘, ‘东苑‘, ‘1‘, null, null);
INSERT INTO `tb_area` VALUES (‘2‘, ‘北苑‘, ‘2‘, null, null);

       <!--mysql-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <!--mybatis-->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.2</version>
        </dependency>
        <!--集成druid，使用连接池-->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.0</version>
        </dependency>

 <!-- 分页插件 -->
<dependency>
    <groupId>com.github.pagehelper</groupId>
    <artifactId>pagehelper-spring-boot-starter</artifactId>
    <version>1.1.2</version>
</dependency>

spring:
    datasource:
        name: demo
        url: jdbc:mysql://127.0.0.1:3306/demo
        username: root
        password: yujie
        # 使用druid数据源
        type: com.alibaba.druid.pool.DruidDataSource
        driver-class-name: com.mysql.jdbc.Driver
        filters: stat
        maxActive: 20
        initialSize: 1
        maxWait: 60000
        minIdle: 1
        timeBetweenEvictionRunsMillis: 60000
        minEvictableIdleTimeMillis: 300000
        validationQuery: select ‘x‘
        testWhileIdle: true
        testOnBorrow: false
        testOnReturn: false
        poolPreparedStatements: true
        maxOpenPreparedStatements: 20
mybatis:
  mapper-locations: classpath:mapping/*.xml
  type-aliases-package: com.yujie.model

#pagehelper分页插件
pagehelper:
    helperDialect: mysql
    reasonable: true
    supportMethodsArguments: true
    params: count=countSql

<?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>
    <!-- 数据库驱动:选择你的本地硬盘上面的数据库驱动包-->
    <classPathEntry  location="E:\java\mysql-connector-java-5.1.46\mysql-connector-java-5.1.46-bin.jar"/>
    <context id="DB2Tables"  targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressDate" value="true"/>
            <!-- 是否去除自动生成的注释 true：是 ： false:否 -->
            <property name="suppressAllComments" value="true"/>
        </commentGenerator>
        <!--数据库链接URL，用户名、密码 -->
        <jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://127.0.0.1/demo" userId="root" password="yujie">
        </jdbcConnection>
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false"/>
        </javaTypeResolver>
        <!-- 生成模型的包名和位置-->
        <javaModelGenerator targetPackage="com.yujie.model" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
            <property name="trimStrings" value="true"/>
        </javaModelGenerator>
        <!-- 生成映射文件的包名和位置-->
        <sqlMapGenerator targetPackage="mapping" targetProject="src/main/resources">
            <property name="enableSubPackages" value="true"/>
        </sqlMapGenerator>
        <!-- 生成DAO的包名和位置-->
        <javaClientGenerator type="XMLMAPPER" targetPackage="com.yujie.mapper" targetProject="src/main/java">
            <property name="enableSubPackages" value="true"/>
        </javaClientGenerator>
        <!-- 要生成的表 tableName是数据库中的表名或视图名 domainObjectName是实体类名-->
        <table tableName="tb_area" domainObjectName="Area" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table>
    </context>
</generatorConfiguration>

            <!-- mybatis generator 自动生成代码插件 -->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.2</version>
                <configuration>
                    <configurationFile>${basedir}/src/main/resources/generator/generatorConfig.xml</configurationFile>
                    <overwrite>true</overwrite>
                    <verbose>true</verbose>
                </configuration>
            </plugin>

package com.winter.service;

import com.winter.model.Area;
import java.util.List;

public interface AreaService {
    int addArea(Area area);
    int editArea(Area area);
    List<Area> findAllArea(int pageNum, int pageSize);
    int deleteArea(Integer areaId);
    Area getArea(Integer areaId);
}

package com.yujie.service.impl;

import com.github.pagehelper.PageHelper;
import com.yujie.mapper.AreaMapper;
import com.yujie.model.Area;
import com.yujie.service.AreaService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service(value = "areaService")
public class AreaServiceImpl implements AreaService {
    @Autowired
    private AreaMapper areaMapper;
    @Override
    public int addArea(Area area) {
        return areaMapper.insertSelective(area);
    }

    @Override
    public int editArea(Area area) {
        return areaMapper.updateByPrimaryKeySelective(area);
    }

    @Override
    public List<Area> findAllArea(int pageNum, int pageSize) {
        //将参数传给这个方法就可以实现物理分页了，非常简单。
        PageHelper.startPage(pageNum, pageSize);
        return areaMapper.selectAllArea();
    }

    @Override
    public int deleteArea(Integer areaId) {
        return areaMapper.deleteByPrimaryKey(areaId);
    }

    @Override
    public Area getArea(Integer areaId) {
        return areaMapper.selectByPrimaryKey(areaId);
    }

}

    //这个方式我自己加的
    List<Area> selectAllArea();