SpringBoot+Mybatis

　　最近一直在面试

　　遇到一个机试要求整合SpringBoot+MyBatis的公司，就顺便整理一下吧。(采用Mybatis配置文件版，比较熟悉这种开发)

　　开发工具 IDEA

　　一.建立基本框架

勾选Lombok便于实体类get，set方法

　　1.改application.properties为yml文件，在yml文件中加入druid配置信息

spring:
  datasource:
#   数据源基本配置
    username: root
    password: root
    driver-class-name: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/mybatis1?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
    type: com.alibaba.druid.pool.DruidDataSource
#   数据源其他配置
    initialSize: 5
    minIdle: 5
    maxActive: 20
    maxWait: 60000
    timeBetweenEvictionRunsMillis: 60000
    minEvictableIdleTimeMillis: 300000
    validationQuery: SELECT 1 FROM DUAL
    testWhileIdle: true
    testOnBorrow: false
    testOnReturn: false
    poolPreparedStatements: true
#   配置监控统计拦截的filters，去掉后监控界面sql无法统计，'wall'用于防火墙
    filters: stat,wall,log4j
    maxPoolPreparedStatementPerConnectionSize: 20
    useGlobalDataSourceStat: true
    connectionProperties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500

　　2.修改pom

　　　　引入阿里连接池druid和log4j依赖

　　　　　　　　　　
		
			com.alibaba
			druid
			1.1.8
		
		
		
			log4j
			log4j
			1.2.17
		

　　3.添加druid的配置类

package com.zhh.springbootmybatis.config;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.support.http.StatViewServlet;
import com.alibaba.druid.support.http.WebStatFilter;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.boot.web.servlet.ServletRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.sql.DataSource;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;

/**
 * @Author zhh
 * @Date 2019/7/19 12:28
 * @Version 1.0
 **/
@Configuration
public class DruidConfig
{
    @ConfigurationProperties(prefix = "spring.datasource")
    @Bean
    public DataSource druid(){
        return  new DruidDataSource();
    }

    //配置Druid的监控
    //1、配置一个管理后台的Servlet
    @Bean
    public ServletRegistrationBean statViewServlet(){
        ServletRegistrationBean bean = new ServletRegistrationBean(new StatViewServlet(), "/druid/*");
        Map initParams = new HashMap<>();

        initParams.put("loginUsername","admin");
        initParams.put("loginPassword","123456");
        initParams.put("allow","");//默认就是允许所有访问
        initParams.put("deny","192.168.1.102");//拒绝访问的ip地址，这里我写了本机ip

        bean.setInitParameters(initParams);
        return bean;
    }


    //2、配置一个web监控的filter
    @Bean
    public FilterRegistrationBean webStatFilter(){
        FilterRegistrationBean bean = new FilterRegistrationBean();
        bean.setFilter(new WebStatFilter());

        Map initParams = new HashMap<>();
        initParams.put("exclusions","*.js,*.css,/druid/*");

        bean.setInitParameters(initParams);

        bean.setUrlPatterns(Arrays.asList("/*"));

        return  bean;
    }

}

　　4.启动一下

　　二、数据库mybatis1

　　　　1.建表，这里弄了两个表employee，department

　　　　　　数据库语句

DROP TABLE IF EXISTS `department`;
CREATE TABLE `department` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `departmentName` varchar(255) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

-- ----------------------------
-- Records of department
-- ----------------------------

-- ----------------------------
-- Table structure for employee
-- ----------------------------
DROP TABLE IF EXISTS `employee`;
CREATE TABLE `employee` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `lastName` varchar(255) DEFAULT NULL,
  `email` varchar(255) DEFAULT NULL,
  `gender` int(2) DEFAULT NULL,
  `d_id` int(11) DEFAULT NULL,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;

　　　　2.mybatis全局配置文件mybatis-config.xml

<?xml version="1.0" encoding="UTF-8" ?>



    
        
    

　　　　3.mybatis逆向生成

　　　　　　　　3.1pom中设置插件

				org.mybatis.generator
				mybatis-generator-maven-plugin
				1.3.7
				
				
					src/main/resources/mybatis/generatorConfig.xml
				
			

　　　　　　　　3.2 mybatis逆向生成配置文件内容

generatorConfig.xml
　　　　　　　　

<?xml version="1.0" encoding="UTF-8"?>



    
    
    
    
        
        
        
        
            
        
        
        
        
            
            
        
        
        
            
        
        
        
            
        

        
        
        
        


    

　　　　　　　3.3 执行

一般就能成功，不成功根据异常百度解决