Spring Boot 2.x整合mybatis及druid数据源及逆向工程

其他 2019-10-19 21:34:10 阅读次数: 0

1逆向工程

1）db.properties

#============================#
#===== Database sttings =====#
#============================#
#jdbc.url=jdbc:mysql://127.0.0.1:3306/wechat?serverTimezone=Asia/Shanghai

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/wechat?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8
jdbc.username=root
jdbc.password=123

2）generatorConfig.xml

<?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>  
    <!-- 引入配置文件 -->  
    <properties resource="db.properties"/>  
    
    <!-- MyBatis3Simple：不生成 Example相关类及方法-->
    <!-- <context id="Mysql" targetRuntime="MyBatis3Simple" defaultModelType="flat">
        <property name="beginningDelimiter" value="`" />
        <property name="endingDelimiter" value="`" />  -->
      
    <!-- 一个数据库一个context -->  
    <context id="DB2Tables" targetRuntime="MyBatis3">
        <commentGenerator>
            <property name="suppressAllComments" value="true" />
        </commentGenerator>
        
        <!-- 配置数据库连接 -->
        <jdbcConnection 
            driverClass="${jdbc.driver}"
            connectionURL="${jdbc.url}" 
            userId="${jdbc.username}"
            password="${jdbc.password}">
        </jdbcConnection>
 
        <javaTypeResolver>
            <property name="forceBigDecimals" value="false" />
        </javaTypeResolver>
 
        <!-- 指定javaBean生成的位置 -->
        <javaModelGenerator targetPackage="com.fei.domain"
            targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
            <property name="trimStrings" value="true" />
        </javaModelGenerator>
 
        <!--指定sql映射文件生成的位置 -->
        <sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources">
            <property name="enableSubPackages" value="true" />
        </sqlMapGenerator>
 
        <!-- 指定dao接口生成的位置，mapper接口 -->
        <javaClientGenerator type="XMLMAPPER"
            targetPackage="com.fei.mapper" targetProject=".\src\main\java">
            <property name="enableSubPackages" value="true" />
        </javaClientGenerator>
 
 
        <!-- table指定每个表的生成策略 -->
        <!-- <table tableName="agent_user_login" domainObjectName="AgentUserLogin"></table> -->
        
        <!-- 配置需要生成的表 -->
        <!-- tableName：数据库表名，%代表所有，domainObjectName：生成文件名 ，schema：数据源 -->
        <table tableName="%">
            <generatedKey column="id" sqlStatement="Mysql" identity="true" />
        </table>
        
    </context> 
</generatorConfiguration>

3）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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.9.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.fei</groupId>
    <artifactId>spring-boot-wechat-login</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>spring-boot-wechat-login</name>
    <description>My project for Spring Boot</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>

        <!-- 整合mybatis及分页插件 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>2.1.0</version>
        </dependency>
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper-spring-boot-starter</artifactId>
            <version>1.2.5</version>
        </dependency>

        <!-- 整合数据源及驱动 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.1.10</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>

        <!-- 热部署工具 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>

            <!-- 逆向工程插件start -->
            <plugin>
                <groupId>org.mybatis.generator</groupId>
                <artifactId>mybatis-generator-maven-plugin</artifactId>
                <version>1.3.7</version>
                <configuration>
                    <!-- 指定generatorConfig.xml配置文件位置 -->
                    <configurationFile>
                        ${basedir}/src/main/resources/generatorConfig.xml
                    </configurationFile>
                    <verbose>true</verbose><!--允许移动生成的文件 -->
                    <overwrite>true</overwrite><!-- 是否覆盖 -->
                </configuration>

                <dependencies>
                    <dependency>
                        <groupId>mysql</groupId>
                        <artifactId>mysql-connector-java</artifactId>
                        <version>5.1.30</version>
                    </dependency>
                </dependencies>
            </plugin><!-- 逆向工程插件end -->

        </plugins>
    </build>

</project>

5）application.properties

# port config
server.port=8081

#============================#
#==== datasource config =====#
#============================#
# can identify automatically
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

spring.datasource.url=jdbc:mysql://localhost:3306/wechat?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=123

# spring boot use com.zaxxer.hikari.HikariDataSource as default datasource 
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource

2接口配置文件自动映射到属性和实体类配置

1）书写配置类，并为相应属性生成set、get方法

package com.fei.config;

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

/**
 * 配置类 
 * Created by zxf on 2019年10月19日
 */
@Configuration // 表明这是一个配置类，使用@Component注解也可以，但是@Configuration比@Component更细，有语义作用
//告诉配置类从哪个配置文件读取
@PropertySource(value = "classpath:application.properties")
public class AppConfig {

    /**
     * 公众号appid
     */
    @Value("${wxpay.appid}")
    private String appId;
    
    /**
     * 公众号密钥
     */
    @Value("${wxpay.appsecret}")
    private String appsecret;

    public String getAppId() {
        return appId;
    }

    public void setAppId(String appId) {
        this.appId = appId;
    }

    public String getAppsecret() {
        return appsecret;
    }

    public void setAppsecret(String appsecret) {
        this.appsecret = appsecret;
    }
    
}

2）书写配置文件application.properties

#============================#
#====== wechat config =======#
#============================#
wxpay.appid=wx5beac15ca207cdd40c
wxpay.appsecret=554801238f17fdsdd6f96b382fe548215e9

3）书写测试Controller

package com.fei.controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.fei.config.AppConfig;

/**
 * 用于测试的Controller控制器 
 * Created by zxf on 2019年10月19日
 */
@RestController
public class TestController {
    
    @Autowired
    private AppConfig appConfig;

    @RequestMapping("/test_config")
    public String testConfig() {
        System.out.println("appConfig.getAppId()：" + appConfig.getAppId());
        return appConfig.getAppId();
    }

}

4）打开浏览器访问http://localhost:8080/test_config测试

==总结：==spring boot整合mybatis步骤

  1. 添加依赖
<!-- 整合mybatis及分页插件 -->
<dependency>
    <groupId>org.mybatis.spring.boot</groupId>
    <artifactId>mybatis-spring-boot-starter</artifactId>
    <version>2.1.0</version>
</dependency>
<dependency>
    <groupId>com.github.pagehelper</groupId>
    <artifactId>pagehelper-spring-boot-starter</artifactId>
    <version>1.2.5</version>
</dependency>

<!-- 整合数据源及驱动 -->
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>druid-spring-boot-starter</artifactId>
    <version>1.1.10</version>
</dependency>
<dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <scope>runtime</scope>
</dependency>
  1. 加入配置文件
# port config
server.port=8081

#============================#
#==== datasource config =====#
#============================#
# can identify automatically
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver

spring.datasource.url=jdbc:mysql://localhost:3306/wechat?serverTimezone=UTC&useUnicode=true&characterEncoding=utf8
spring.datasource.username=root
spring.datasource.password=123

# spring boot use com.zaxxer.hikari.HikariDataSource as default datasource 
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
  1. 启动类增加mapper扫描
package com.fei;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
// mapper接口扫描
@MapperScan("com.fei.mapper")
public class SpringBootWechatLoginApplication {

    public static void main(String[] args) {
        SpringApplication.run(SpringBootWechatLoginApplication.class, args);
    }

}
  1. 书写mapper接口
import java.util.List;

import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;
import org.mybatis.spring.annotation.MapperScan;

public interface VideoMapper {
    /**
     * 查询所有， mapper接口扫描@MapperScan("com.fei.mapper")
     * 
     * @return
     */
    @Select("select * from video")
    List<Video> findAll();
}
  1. 书写测试类
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * 用于测试的Controller控制器 
 * Created by zxf on 2019年10月19日
 */
@RestController
public class TestController {
        
    @Autowired
    private VideoMapper videoMapper;
    
    @RequestMapping("/test_db")
    public Object testDB() {
        return videoMapper.findAll();
    }

}

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