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
<!-- https://mvnrepository.com/artifact/com.alibaba/druid --> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.1.8</version> </dependency> <!-- https://mvnrepository.com/artifact/log4j/log4j --> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>1.2.17</version> </dependency>
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<String,String> 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<String,String> 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" ?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<setting name="mapUnderscoreToCamelCase" value="true"/>
</settings>
</configuration>
3.mybatis逆向生成
3.1pom中设置插件
<plugin> <groupId>org.mybatis.generator</groupId> <artifactId>mybatis-generator-maven-plugin</artifactId> <version>1.3.7</version> <!--声明配置文件xml的位置--> <configuration> <configurationFile>src/main/resources/mybatis/generatorConfig.xml</configurationFile> </configuration> </plugin>
3.2 mybatis逆向生成配置文件内容
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">
<!--利用MyBatis Generator里面的Xml文件格式，复制成为resource的xml文件，并进行修改-->
<generatorConfiguration>
<!--找到MySQL驱动包的路径-->
<classPathEntry location="G:\dataSource\dataSourceDriver\mysql-connector-java-5.1.47.jar" />
<!--配置连接MySQL数据库的信息-->
<context id="inputdb" targetRuntime="MyBatis3">
<jdbcConnection driverClass="com.mysql.jdbc.Driver"
connectionURL="jdbc:mysql://localhost:3306/mybatis1"
userId="root"
password="root">
</jdbcConnection>
<!--会将数据库里的int类型数据转换为Java里的bigDecimals -->
<javaTypeResolver >
<property name="forceBigDecimals" value="false" />
</javaTypeResolver>
<!--配置各个文件的相对路径和项目路径-->
<!--产生实体类，需要和App是同级的-->
<javaModelGenerator targetPackage="com.zhh.springbootmybatis2.entity" targetProject="src/main/java">
<property name="enableSubPackages" value="true" />
<property name="trimStrings" value="true" />
</javaModelGenerator>
<!--映射文件，一定是在resources中的-->
<sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources/mybatis">
<property name="enableSubPackages" value="true" />
</sqlMapGenerator>
<!--底层dao-->
<javaClientGenerator type="XMLMAPPER" targetPackage="com.zhh.springbootmybatis2.dao" targetProject="src/main/java">
<property name="enableSubPackages" value="true" />
</javaClientGenerator>
<!--将example类型设为false，否则实体类里面会多一个example的类exampleStudent -->
<!--表明为数据库的表明，生成实体类Student，会自动生成到entity的目录中-->
<table tableName="employee" domainObjectName="Employee" enableCountByExample="false" enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false">
</table>
<table tableName="department" domainObjectName="Department" enableCountByExample="false" enableDeleteByExample="false" enableSelectByExample="false" enableUpdateByExample="false">
</table>
</context>
</generatorConfiguration>
3.3 执行
一般就能成功，不成功根据异常百度解决
