mybatis自动生成xml的配置

idea通过数据库直接生成mybatis的xml和实体文件，很简单，一共分三步
1.配置generatorConfig.xml
2.配置pom
3.配置命令 mybatis-generator:generate -e

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.1</version>
        </dependency>

1.配置generatorConfig.xml
以下会自动生成entity，mapper，和xml文件
mapper上是没有@Mapper注解的呦

<!--<?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>
    <!--classPathEntry:数据库的JDBC驱动,换成你自己的驱动位置 可选 -->
    <classPathEntry location="F:\aaaRepository\java\repository\mysql\mysql-connector-java\8.0.17\mysql-connector-java-8.0.17.jar"/>
    <context id="mysql">
            <commentGenerator>
                <property name="suppressDate" value="true" />
                <property name="suppressAllComments" value="true" />
            </commentGenerator>
            <jdbcConnection
                    connectionURL="jdbc:mysql://localhost:3306/aaa?serverTimezone=GMT%2B8"
                    driverClass="com.mysql.cj.jdbc.Driver" password="root" userId="root" />
            <javaTypeResolver>
                <property name="forceBigDecimals" value="false" />
            </javaTypeResolver>
            <javaModelGenerator targetPackage="com.aaa.bbb.entity" targetProject="src/main/java" >
                <property name="constructorBased" value="false"/>
            </javaModelGenerator>
            <sqlMapGenerator targetPackage="mapper" targetProject="src/main/resources"/>
            <javaClientGenerator targetPackage="com.aaa.bbb.mapper" targetProject="src/main/java" type="XMLMAPPER" >
            </javaClientGenerator>
            <table tableName="ccc"  enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false"     enableSelectByExample="false"> </table>         	   
       </context>
</generatorConfiguration>

“context” 的内容必须匹配按照下面的顺序配置 ？号的可以没有
(connectionFactory|jdbcConnection),
javaTypeResolver?,
javaModelGenerator,
sqlMapGenerator?,
javaClientGenerator?,
table+

2.配置pom

<build>
		<plugins>
			<plugin>
				<groupId>org.mybatis.generator</groupId>
				<artifactId>mybatis-generator-maven-plugin</artifactId>
				<configuration>
					<verbose>true</verbose>
					<overwrite>true</overwrite>
				</configuration>
			</plugin>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>

3. 命令 mybatis-generator:generate -e
   
   运行上边的命令就行了，实体是驼峰形式的，也可以修改配置和数据库一样

public class Ccc{
    private Integer id;

    private String identifyCode;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getIdentifyCode() {
        return identifyCode;
    }

    public void setIdentifyCode(String identifyCode) {
        this.identifyCode = identifyCode;
    }

}