1.添加依赖
<!-- mybatis -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>1.3.2</version>
</dependency>
<!-- MyBatis 生成器 -->
<dependency>
<groupId>org.mybatis.generator</groupId>
<artifactId>mybatis-generator-core</artifactId>
<version>1.3.3</version>
</dependency>
2.自定义注释生成器
import org.mybatis.generator.api.IntrospectedColumn;
import org.mybatis.generator.api.IntrospectedTable;
import org.mybatis.generator.api.dom.java.Field;
import org.mybatis.generator.internal.DefaultCommentGenerator;
import org.mybatis.generator.internal.util.StringUtility;
import java.util.Properties;
/**
* 自定义注释生成器
* Created by macro on 2018/4/26.
*/
public class CommentGenerator extends DefaultCommentGenerator {
private boolean addRemarkComments = false;
/**
* 设置用户配置的参数
*/
@Override
public void addConfigurationProperties(Properties properties) {
super.addConfigurationProperties(properties);
this.addRemarkComments = StringUtility.isTrue(properties.getProperty("addRemarkComments"));
}
/**
* 给字段添加注释
*/
@Override
public void addFieldComment(Field field, IntrospectedTable introspectedTable,
IntrospectedColumn introspectedColumn) {
String remarks = introspectedColumn.getRemarks();
//根据参数和备注信息判断是否添加备注信息
if(addRemarkComments&&StringUtility.stringHasValue(remarks)){
//文档注释开始
field.addJavaDocLine("/**");
//获取数据库字段的备注信息
String[] remarkLines = remarks.split(System.getProperty("line.separator"));
for(String remarkLine:remarkLines){
field.addJavaDocLine(" * "+remarkLine);
}
addJavadocTag(field, false);
field.addJavaDocLine(" */");
}
}
}
2.用于生产MBG的代码(执行操作的代码)
import org.mybatis.generator.api.MyBatisGenerator;
import org.mybatis.generator.config.Configuration;
import org.mybatis.generator.config.xml.ConfigurationParser;
import org.mybatis.generator.internal.DefaultShellCallback;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
/**
* 用于生产MBG的代码
* Created by macro on 2018/4/26.
*/
public class Generator {
public static void main(String[] args) throws Exception {
//MBG 执行过程中的警告信息
List<String> warnings = new ArrayList<String>();
//当生成的代码重复时,覆盖原代码
boolean overwrite = true;
//读取我们的 MBG 配置文件
InputStream is = Generator.class.getResourceAsStream("/generatorConfig.xml");
ConfigurationParser cp = new ConfigurationParser(warnings);
Configuration config = cp.parseConfiguration(is);
is.close();
DefaultShellCallback callback = new DefaultShellCallback(overwrite);
//创建 MBG
MyBatisGenerator myBatisGenerator = new MyBatisGenerator(config, callback, warnings);
//执行生成代码
myBatisGenerator.generate(null);
//输出警告信息
for (String warning : warnings) {
System.out.println(warning);
}
}
}
3.数据库连接配置文件(generator.properties)
jdbc.driverClass=oracle.jdbc.OracleDriver
jdbc.connectionURL=jdbc:oracle:thin:@localhost:3306:orcl
jdbc.userId=root
jdbc.password=root
4.生成策略配置文件
<?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>
<properties resource="generator.properties"/>
<context id="MySqlContext" targetRuntime="MyBatis3Simple" defaultModelType="flat">
<property name="beginningDelimiter" value="`"/>
<property name="endingDelimiter" value="`"/>
<property name="javaFileEncoding" value="UTF-8"/>
<!-- 为模型生成序列化方法-->
<plugin type="org.mybatis.generator.plugins.SerializablePlugin"/>
<!-- 为生成的Java模型创建一个toString方法 -->
<plugin type="org.mybatis.generator.plugins.ToStringPlugin"/>
<commentGenerator type="com.edu.cms.CommentGenerator">
<!-- 是否去除自动生成的注释 true:是 : false:否 不要轻易修改,关系到生成文件是否重复问题-->
<property name="suppressAllComments" value="false"/>
<property name="suppressDate" value="true"/>
<property name="addRemarkComments" value="false"/>
</commentGenerator>
<jdbcConnection driverClass="oracle.jdbc.OracleDriver"
connectionURL="jdbc:oracle:thin:@10.111.96.21:1521:orcl"
userId="edugw5"
password="edugw5">
</jdbcConnection>
<!-- 默认false,把JDBC DECIMAL 和 NUMERIC 类型解析为 Integer,为 true时把JDBC DECIMAL 和NUMERIC 类型解析为java.math.BigDecimal
Oracle中number类型要设置长度,>18或者不设置长度将自动转换成BigDecimal-->
<javaTypeResolver type="org.mybatis.generator.internal.types.JavaTypeResolverDefaultImpl">
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<javaModelGenerator targetPackage="com.edu.cms.entity" targetProject=".\src\main\java"/>
<sqlMapGenerator targetPackage="mapper" targetProject=".\src\main\resources"/>
<javaClientGenerator type="XMLMAPPER" targetPackage="com.edu.cms.dao"
targetProject=".\src\main\java"/>
<!--生成全部表tableName设为%,表名后面的参数表示不生成Example类文件-->
<table tableName="table" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false"
enableSelectByExample="false" selectByExampleQueryId="false" >
<!--<generatedKey column="id" sqlStatement="select SEQ_{1}.nextval from dual" identity="false" type="pre"/>-->
</table>
</context>
</generatorConfiguration>