com.github.yulichang.query

类 MPJQueryWrapper<T>

java.lang.Object

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

com.baomidou.mybatisplus.core.conditions.AbstractWrapper<T,String,MPJQueryWrapper<T>>

com.github.yulichang.query.MPJQueryWrapper<T>

所有已实现的接口:

com.baomidou.mybatisplus.core.conditions.interfaces.Compare<MPJQueryWrapper<T>,String>, com.baomidou.mybatisplus.core.conditions.interfaces.Func<MPJQueryWrapper<T>,String>, com.baomidou.mybatisplus.core.conditions.interfaces.Join<MPJQueryWrapper<T>>, com.baomidou.mybatisplus.core.conditions.interfaces.Nested<MPJQueryWrapper<T>,MPJQueryWrapper<T>>, com.baomidou.mybatisplus.core.conditions.ISqlSegment, com.baomidou.mybatisplus.core.conditions.query.Query<MPJQueryWrapper<T>,T,String>, MPJBaseJoin, MPJJoin<MPJQueryWrapper<T>>, Serializable

public class MPJQueryWrapper<T>
extends com.baomidou.mybatisplus.core.conditions.AbstractWrapper<T,String,MPJQueryWrapper<T>>
implements com.baomidou.mybatisplus.core.conditions.query.Query<MPJQueryWrapper<T>,T,String>, MPJJoin<MPJQueryWrapper<T>>

copy QueryWrapper 推荐使用 Wrappers.queryJoin();构造

作者:

yulichang

另请参阅:

Wrappers, 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

com.baomidou.mybatisplus.core.conditions.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

构造器和说明
MPJQueryWrapper()
MPJQueryWrapper(T entity, Class<T> entityClass, AtomicInteger paramNameSeq, Map<String,Object> paramNameValuePairs, com.baomidou.mybatisplus.core.conditions.segments.MergeSegments mergeSegments, com.baomidou.mybatisplus.core.conditions.SharedString sqlSelect, com.baomidou.mybatisplus.core.conditions.SharedString from, com.baomidou.mybatisplus.core.conditions.SharedString lastSql, com.baomidou.mybatisplus.core.conditions.SharedString sqlComment, com.baomidou.mybatisplus.core.conditions.SharedString sqlFirst, List<String> selectColumns, List<String> ignoreColumns) 非对外公开的构造方法,只用于生产嵌套 sql

方法概要

限定符和类型	方法和说明
MPJQueryWrapper<T>	alias(String tableAlias) 设置表别名(默认为 t 可以调用此方法修改,调用后才生效，所以最好第一个调用)
void	clear()
String	getAlias()
boolean	getAutoAlias()
String	getFrom()
String	getSqlSelect()
protected MPJQueryWrapper<T>	instance() 用于生成嵌套 sql 故 sqlSelect selectColumn ignoreColumns from不向下传递
MPJQueryWrapper<T>	join(String keyWord, boolean condition, String joinSql)
MPJLambdaQueryWrapper<T>	lambda() 返回一个支持 lambda 函数写法的 wrapper
MPJQueryWrapper<T>	select(Class<T> entityClass, Predicate<com.baomidou.mybatisplus.core.metadata.TableFieldInfo> predicate) 此方法只能用于主表 不好含主键
MPJQueryWrapper<T>	select(String... columns)
MPJQueryWrapper<T>	selectAll(Class<?> clazz, String as) 查询指定实体全部字段
MPJQueryWrapper<T>	selectAll(Class<T> clazz) 查询主表全部字段
MPJQueryWrapper<T>	selectIgnore(String... columns) 忽略查询字段 用法: selectIgnore("t.id","t.sex","a.area")

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, columnsToString, columnToSqlSegment, columnToString, 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.query.Query

select

从接口继承的方法 com.github.yulichang.query.interfaces.MPJJoin

innerJoin, innerJoin, leftJoin, leftJoin, rightJoin, rightJoin

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.Nested

and, nested, not, or

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.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

构造器详细资料

MPJQueryWrapper

public MPJQueryWrapper()

MPJQueryWrapper

public MPJQueryWrapper(T entity,
                       Class<T> entityClass,
                       AtomicInteger paramNameSeq,
                       Map<String,Object> paramNameValuePairs,
                       com.baomidou.mybatisplus.core.conditions.segments.MergeSegments mergeSegments,
                       com.baomidou.mybatisplus.core.conditions.SharedString sqlSelect,
                       com.baomidou.mybatisplus.core.conditions.SharedString from,
                       com.baomidou.mybatisplus.core.conditions.SharedString lastSql,
                       com.baomidou.mybatisplus.core.conditions.SharedString sqlComment,
                       com.baomidou.mybatisplus.core.conditions.SharedString sqlFirst,
                       List<String> selectColumns,
                       List<String> ignoreColumns)

非对外公开的构造方法,只用于生产嵌套 sql

参数:

entityClass - 本不应该需要的

方法详细资料

alias

public final MPJQueryWrapper<T> alias(String tableAlias)

设置表别名(默认为 t 可以调用此方法修改,调用后才生效，所以最好第一个调用)

select

public MPJQueryWrapper<T> select(String... columns)

指定者:

select 在接口中 com.baomidou.mybatisplus.core.conditions.query.Query<MPJQueryWrapper<T>,T,String>

selectIgnore

public MPJQueryWrapper<T> selectIgnore(String... columns)

忽略查询字段

用法: selectIgnore("t.id","t.sex","a.area")

从以下版本开始:

1.1.3

select

public MPJQueryWrapper<T> select(Class<T> entityClass,
                                 Predicate<com.baomidou.mybatisplus.core.metadata.TableFieldInfo> predicate)

此方法只能用于主表 不好含主键

指定者:

select 在接口中 com.baomidou.mybatisplus.core.conditions.query.Query<MPJQueryWrapper<T>,T,String>

参数:

entityClass - 主表class

predicate - 条件lambda

selectAll

public final MPJQueryWrapper<T> selectAll(Class<T> clazz)

查询主表全部字段

参数:

clazz - 主表class

selectAll

public final MPJQueryWrapper<T> selectAll(Class<?> clazz,
                                          String as)

查询指定实体全部字段

参数:

as - 实体对应的别名

getSqlSelect

public String getSqlSelect()

指定者:

getSqlSelect 在接口中 com.baomidou.mybatisplus.core.conditions.query.Query<MPJQueryWrapper<T>,T,String>

覆盖:

getSqlSelect 在类中 com.baomidou.mybatisplus.core.conditions.Wrapper<T>

getFrom

public String getFrom()

getAutoAlias

public boolean getAutoAlias()

getAlias

public String getAlias()

lambda

public MPJLambdaQueryWrapper<T> lambda()

返回一个支持 lambda 函数写法的 wrapper

instance

protected MPJQueryWrapper<T> instance()

用于生成嵌套 sql

故 sqlSelect selectColumn ignoreColumns from不向下传递

指定者:

instance 在类中 com.baomidou.mybatisplus.core.conditions.AbstractWrapper<T,String,MPJQueryWrapper<T>>

clear

public void clear()

覆盖:

clear 在类中 com.baomidou.mybatisplus.core.conditions.AbstractWrapper<T,String,MPJQueryWrapper<T>>

join

public MPJQueryWrapper<T> join(String keyWord,
                               boolean condition,
                               String joinSql)

指定者:

join 在接口中 MPJJoin<MPJQueryWrapper<T>>