Mybatis useGeneratedKeys参数用法及问题小结

# MyBatis配置
mybatis:
    # 搜索指定包别名
    typeAliasesPackage: com.ruoyi.**.domain
    # 配置mapper的扫描，找到所有的mapper.xml映射文件
    mapperLocations: classpath*:mapper/**/*Mapper.xml
    # 加载全局的配置文件
    configLocation: classpath:mybatis/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="cacheEnabled"             value="true" />  <!-- 全局映射器启用缓存 -->
		<setting name="useGeneratedKeys"         value="true" />  <!-- 允许 JDBC 支持自动生成主键 -->
		<setting name="defaultExecutorType"      value="REUSE" /> <!-- 配置默认的执行器 -->
		<setting name="logImpl"                  value="SLF4J" /> <!-- 指定 MyBatis 所用日志的具体实现 -->
<!--		<setting name="mapUnderscoreToCamelCase" value="true"/> &lt;!&ndash; 驼峰式命名 &ndash;&gt;-->
	</settings>
</configuration>

<insert id="addBigdataGroup" parameterType="BigdataGroup" useGeneratedKeys="true" keyProperty="groupId" keyColumn="group_id">
        insert into bigdata_group (
        group_id, group_name, comment, business_line, create_by, remark, create_time)
        values(#{groupId}, #{groupName}, #{comment}, #{businessLine}, #{createBy}, #{remark}, sysdate() );
</insert>

@Options(useGeneratedKeys = true, keyProperty = "id", keyColumn = "id")
@Insert("insert into test(name,descr,url,create_time,update_time) values(#{name},#{descr},#{url},now(),now())")
Integer insertOneTest(Test test);

import java.util.List;
public interface BigdataMapper {
    List<BigdataGroup> getBigdataGroup();
    int addBigdataGroup(BigdataGroup bigdataGroup);
}

public int addBigdataGroup(BigdataGroup bigdataGroup) {
        bigdataGroup.setCreateBy(SecurityUtils.getUsername());
        int update = bigdataMapper.addBigdataGroup(bigdataGroup);
        log.info("update: {}", update);
        return update;
    }

<insert id="addBigdataGroup" parameterType="BigdataGroup" useGeneratedKeys="true" keyProperty="groupId" keyColumn="group_id">
        insert into bigdata_group (
        group_id, group_name, comment, business_line, create_by, remark, create_time)
        values(#{groupId}, #{groupName}, #{comment}, #{businessLine}, #{createBy}, #{remark}, sysdate() );
    </insert>

public int addBigdataGroup(BigdataGroup bigdataGroup) {
        bigdataGroup.setCreateBy(SecurityUtils.getUsername());
        int update = bigdataMapper.addBigdataGroup(bigdataGroup);
        log.info("update: {}", update);
        // 新增如下代码
        int group_id = bigdataGroup.getGroupId();
        log.info("group_id: {}", group_id);
        // 到此为止
        return update;
    }