publicstaticfinalintBATCH_UPDATE_RETURN_VALUE = Integer.MIN_VALUE + 1002;publicintdoUpdate(MappedStatement ms, Object parameterObject)throwsSQLException {finalConfiguration configuration =ms.getConfiguration();finalStatementHandler handler = configuration.newStatementHandler(this, ms, parameterObject, RowBounds.D...
defaultExecutorType的默认执行器是SIMPLE。 由于项目配置中启用了BATCH执行器,UPDATE和DELETE返回的行数就丢失了,把执行器改为SIMPLE即可。 通过查看源码可以发现,batch执行器返回的是最大批量执行条数: public static final int BATCH_UPDATE_RETURN_VALUE = Integer.MIN_VALUE + 1002; public int doUpdate(MappedStat...
Update Return Values: When we perform an update operation using MyBatis, it can return an integer value. This integer represents the number of rows affected by the update statement. For example,if we update five rows in the database, the return value will be 5. The update return value is...
int update_no = yylfHttpServletMapper.update_no("0"); //3-2更新成功:有多条数据,返回更新的数据条数 int update_duotiao = yylfHttpServletMapper.update_duotiao_systemcode("2"); //3-3更新失败:例如有外键,报异常 //int update_fail = yylfHttpServletMapper.update_fail("1"); //4查询 //...
</update> <delete id="deleteUnlockTagInfo" parameterClass="int"> delete from desktop_unlock_tag where id=#value:INTEGER# </delete> select count(*) from desktop_unlock_tag <sql id="selectUnlockTagInfo"> select id,name,description,priority from desktop_unlock_tag </...
public class BatchExecutor extends BaseExecutor { // 批量更新处理的固定返回值,不是返回受影响的行数 public static final int BATCH_UPDATE_RETURN_VALUE = Integer.MIN_VALUE + 1002; // Statement集合 private final List<Statement> statementList = new ArrayList<>(); //批量结果的集合 private final Li...
MyBatis注解方式之@Update/@Delete使用详解 @Update 1. RoleMapper接口增加接口方法 /** * * * @Title: updateSysRoleById * * @Description: updateSysRoleById * * @param sysRole * @return * * @return: int */ @Update({ "update sys_role set role_name = #{roleName},enabled = #{enabled}...
DEBUG[main]-==>Parameters:1(Integer)TRACE[main]-<==Columns:id,name,ageTRACE[main]-<==Row:1,凯伦,16DEBUG[main]-<==Total:1studentMapper2读取数据:StudentEntity{id=1,name='凯伦',age=16,className='null'}DEBUG[main]-==>Preparing:UPDATEstudentSETname=?WHEREid=?DEBUG[main]-==>Parameters:...
在MyBatis 中,可以通过自定义拦截器来记录更新前后的值。以下是一个简单的示例: 首先,创建一个实现 org.apache.ibatis.plugin.Interceptor 接口的拦截器类,重写 intercept 方法: public class UpdateInterceptor implements Interceptor { @Override public Object intercept(Invocation invocation) throws Throwable { // ...
UpdateWrapper<TestMysql> wrapper2 =newUpdateWrapper<>(); wrapper2.set("VALUE","2"); wrapper2.eq("ID","BIN");intupdateNum2=mysqlMapper.update(null, wrapper2); log.info("更新行数:"+updateNum2); } mysql同样,第一次更新了一条数据,所以更新行数为1,第二次更新了没有的数据,返回了0。