public class QueryWrapper<T> extends AbstractWrapper<T,java.lang.String,QueryWrapper<T>> implements Query<QueryWrapper<T>,T,java.lang.String>
entity, entityClass, expression, lastSql, paramNameSeq, paramNameValuePairs, sqlComment, typedThis| 构造器和说明 |
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QueryWrapper() |
QueryWrapper(T entity) |
QueryWrapper(T entity,
java.lang.String... columns) |
| 限定符和类型 | 方法和说明 |
|---|---|
java.lang.String |
getSqlSelect()
查询条件 SQL 片段
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protected QueryWrapper<T> |
instance()
用于生成嵌套 sql
故 sqlSelect 不向下传递
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LambdaQueryWrapper<T> |
lambda()
返回一个支持 lambda 函数写法的 wrapper
|
QueryWrapper<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!)
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QueryWrapper<T> |
select(java.util.function.Predicate<TableFieldInfo> predicate)
ignore
注意只有内部有 entity 才能使用该方法
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QueryWrapper<T> |
select(java.lang.String... columns)
设置查询字段
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addCondition, addNestedCondition, allEq, allEq, and, and, apply, between, clone, columnsToString, columnToString, comment, doIt, eq, exists, formatSql, formatSqlIfNeed, ge, getCheckEntityClass, getEntity, getExpression, getParamNameValuePairs, getSqlComment, getSqlSegment, groupBy, gt, having, in, initEntityClass, initNeed, inSql, isNotNull, isNull, last, le, like, likeLeft, likeRight, likeValue, lt, ne, nested, not, notBetween, notExists, notIn, notInSql, notLike, or, or, orderBy, setEntitygetCustomSqlSegment, getSqlSet, isEmptyOfEntity, isEmptyOfNormal, isEmptyOfWhere, nonEmptyOfEntity, nonEmptyOfNormal, nonEmptyOfWhereequals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitallEq, allEq, allEq, allEq, between, eq, ge, gt, le, like, likeLeft, likeRight, lt, ne, notBetween, notLikeapply, comment, exists, last, notExists, orgroupBy, groupBy, having, in, in, in, inSql, isNotNull, isNull, notIn, notIn, notIn, notInSql, orderByAsc, orderByAsc, orderByAsc, orderByDesc, orderByDesc, orderByDescpublic QueryWrapper()
public QueryWrapper(T entity)
public QueryWrapper(T entity, java.lang.String... columns)
public QueryWrapper<T> select(java.lang.String... columns)
Queryselect 在接口中 Query<QueryWrapper<T>,T,java.lang.String>columns - 字段数组public QueryWrapper<T> select(java.util.function.Predicate<TableFieldInfo> predicate)
Query注意只有内部有 entity 才能使用该方法
select 在接口中 Query<QueryWrapper<T>,T,java.lang.String>public QueryWrapper<T> select(java.lang.Class<T> entityClass, java.util.function.Predicate<TableFieldInfo> predicate)
Query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)
select 在接口中 Query<QueryWrapper<T>,T,java.lang.String>predicate - 过滤方式public java.lang.String getSqlSelect()
QuerygetSqlSelect 在接口中 Query<QueryWrapper<T>,T,java.lang.String>getSqlSelect 在类中 Wrapper<T>public LambdaQueryWrapper<T> lambda()
protected QueryWrapper<T> instance()
故 sqlSelect 不向下传递
instance 在类中 AbstractWrapper<T,java.lang.String,QueryWrapper<T>>