程序包 com.baomidou.mybatisplus.core.conditions.query

类 LambdaQueryWrapper<T>

java.lang.Object

com.baomidou.mybatisplus.core.conditions.Wrapper<T>

com.baomidou.mybatisplus.core.conditions.AbstractWrapper<T,SFunction<T,?>,Children>

com.baomidou.mybatisplus.core.conditions.AbstractLambdaWrapper<T,LambdaQueryWrapper<T>>

com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper<T>

所有已实现的接口:

Compare<LambdaQueryWrapper<T>,SFunction<T,?>>, Func<LambdaQueryWrapper<T>,SFunction<T,?>>, Join<LambdaQueryWrapper<T>>, Nested<LambdaQueryWrapper<T>,LambdaQueryWrapper<T>>, ISqlSegment, Query<LambdaQueryWrapper<T>,T,SFunction<T,?>>, java.io.Serializable

public class LambdaQueryWrapper<T>
extends AbstractLambdaWrapper<T,LambdaQueryWrapper<T>>
implements Query<LambdaQueryWrapper<T>,T,SFunction<T,?>>

Lambda 语法使用 Wrapper

从以下版本开始:

2017-05-26

作者:

hubin miemie HCL

另请参阅:

序列化表格

嵌套类概要

从类继承的嵌套类/接口 com.baomidou.mybatisplus.core.conditions.AbstractWrapper

AbstractWrapper.DoSomething

字段概要

从类继承的字段 com.baomidou.mybatisplus.core.conditions.AbstractWrapper

expression, lastSql, paramAlias, paramNameSeq, paramNameValuePairs, sqlComment, sqlFirst, typedThis

构造器概要

构造器

构造器	说明
LambdaQueryWrapper()
LambdaQueryWrapper(java.lang.Class<T> entityClass)
LambdaQueryWrapper(T entity)

方法概要

修饰符和类型	方法	说明
void	clear()	条件清空
java.lang.String	getSqlSelect()	查询条件 SQL 片段
protected LambdaQueryWrapper<T>	instance()	用于生成嵌套 sql
LambdaQueryWrapper<T>	select(SFunction<T,?>... columns)	SELECT 部分 SQL 设置
LambdaQueryWrapper<T>	select(java.lang.Class<T> entityClass, java.util.function.Predicate<TableFieldInfo> predicate)	过滤查询的字段信息(主键除外!)

从类继承的方法 com.baomidou.mybatisplus.core.conditions.AbstractLambdaWrapper

columnsToString, columnsToString, columnsToString, columnToString, columnToString, getColumnCache

从类继承的方法 com.baomidou.mybatisplus.core.conditions.AbstractWrapper

addCondition, addNestedCondition, allEq, allEq, and, and, appendSqlSegments, apply, between, clone, columnSqlInjectFilter, columnsToString, columnToSqlSegment, comment, eq, exists, first, formatParam, formatSqlMaybeWithParam, func, ge, geSql, getEntity, getEntityClass, getExpression, getParamAlias, getParamNameValuePairs, getSqlComment, getSqlFirst, getSqlSegment, groupBy, groupBy, groupBy, gt, gtSql, having, in, in, inExpression, inExpression, initNeed, inSql, isNotNull, isNull, isUseAnnotationOrderBy, last, le, leSql, like, likeLeft, likeRight, likeValue, lt, ltSql, maybeDo, ne, nested, not, not, notBetween, notExists, notIn, notIn, notInSql, notLike, or, or, orderBy, orderBy, orderBy, setEntity, setEntityClass, setParamAlias

从类继承的方法 com.baomidou.mybatisplus.core.conditions.Wrapper

getCustomSqlSegment, getSqlSet, getTargetSql, isEmptyOfEntity, isEmptyOfNormal, isEmptyOfWhere, nonEmptyOfEntity, nonEmptyOfNormal, nonEmptyOfWhere

从类继承的方法 java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

从接口继承的方法 com.baomidou.mybatisplus.core.conditions.interfaces.Compare

allEq, allEq, allEq, allEq, between, eq, ge, gt, le, like, likeLeft, likeRight, lt, ne, notBetween, notLike

从接口继承的方法 com.baomidou.mybatisplus.core.conditions.interfaces.Func

func, geSql, groupBy, groupBy, groupBy, gtSql, having, in, in, inSql, isNotNull, isNull, leSql, ltSql, notIn, notIn, notInSql, orderByAsc, orderByAsc, orderByAsc, orderByAsc, orderByAsc, orderByAsc, orderByDesc, orderByDesc, orderByDesc, orderByDesc, orderByDesc, orderByDesc

从接口继承的方法 com.baomidou.mybatisplus.core.conditions.interfaces.Join

apply, comment, exists, first, last, notExists, or

从接口继承的方法 com.baomidou.mybatisplus.core.conditions.interfaces.Nested

and, nested, not, or

从接口继承的方法 com.baomidou.mybatisplus.core.conditions.query.Query

select

构造器详细资料

LambdaQueryWrapper

public LambdaQueryWrapper()

LambdaQueryWrapper

public LambdaQueryWrapper(T entity)

LambdaQueryWrapper

public LambdaQueryWrapper(java.lang.Class<T> entityClass)

方法详细资料

select

@SafeVarargs
public final LambdaQueryWrapper<T> select(SFunction<T,?>... columns)

SELECT 部分 SQL 设置

指定者:

select 在接口中 Query<LambdaQueryWrapper<T>,T,SFunction<T,?>>

参数:

columns - 查询字段

select

public LambdaQueryWrapper<T> select(java.lang.Class<T> entityClass,
                                    java.util.function.Predicate<TableFieldInfo> predicate)

过滤查询的字段信息(主键除外!)

例1: 只要 java 字段名以 "test" 开头的 -> select(i -> i.getProperty().startsWith("test"))

例2: 只要 java 字段属性是 CharSequence 类型的 -> select(TableFieldInfo::isCharSequence)

例3: 只要 java 字段没有填充策略的 -> select(i -> i.getFieldFill() == FieldFill.DEFAULT)

例4: 要全部字段 -> select(i -> true)

例5: 只要主键字段 -> select(i -> false)

指定者:

select 在接口中 Query<LambdaQueryWrapper<T>,T,SFunction<T,?>>

参数:

predicate - 过滤方式

返回:

this

getSqlSelect

public java.lang.String getSqlSelect()

从接口复制的说明: Query

查询条件 SQL 片段

指定者:

getSqlSelect 在接口中 Query<LambdaQueryWrapper<T>,T,SFunction<T,?>>

覆盖:

getSqlSelect 在类中 Wrapper<T>

instance

protected LambdaQueryWrapper<T> instance()

用于生成嵌套 sql

故 sqlSelect 不向下传递

指定者:

instance 在类中 AbstractWrapper<T,SFunction<T,?>,LambdaQueryWrapper<T>>

clear

public void clear()

从类复制的说明: Wrapper

条件清空

覆盖:

clear 在类中 AbstractWrapper<T,SFunction<T,?>,LambdaQueryWrapper<T>>