新增count 求集合数

Author: xuejike0

jpa-lambda-core/src/main/java/com/github/xuejike/query/jpa/lambda/JpaQuery.java

@@ -31,12 +31,14 @@ public JpaLambdaQuery<T> lambda(){
         JpaLambdaQuery<T> query = new JpaLambdaQuery<T>(this);
         return query;
     }
+    @Override
     public JpaQuery<T> orderAsc(String ...fields){
         for (String field : fields) {
             orderList.add(Order.asc(field));
         }
         return this;
     }
+    @Override
     public JpaQuery<T> orderDesc(String ...fields){
         for (String field : fields) {
             orderList.add(Order.desc(field));
@@ -60,17 +62,10 @@ public JpaQuery<T> distinct(String field, String alias) {
         return this;
     }
 
-    @Override
-    public JpaQuery<T> count(String field, String alias) {
-        Projection property = Projections.count(field);
-        if (alias != null){
-            property = ((CountProjection) property).as(alias);
-        }
-        selectProjectionList.add(property);
-        return this;
-    }
 
-    public JpaQuery<T> select(String field,String alias){
+
+    @Override
+    public JpaQuery<T> select(String field, String alias){
         Projection property = Projections.property(field);
         if (alias != null){
             property = ((PropertyProjection) property).as(alias);
@@ -342,7 +337,8 @@ public JpaQuery<T> allEq(Map<String,Object> eqMap){
         whereCriterionList.add(Restrictions.allEq(eqMap));
         return this;
     }
-    public JpaQuery<T> example(T obj,MatchMode likeModel,String ... excludeProperties){
+    @Override
+    public JpaQuery<T> example(T obj, MatchMode likeModel, String ... excludeProperties){
         Example example = Example.create(obj);
         Optional.ofNullable(likeModel).ifPresent(example::enableLike);
         Optional.ofNullable(excludeProperties)

jpa-lambda-core/src/main/java/com/github/xuejike/query/jpa/lambda/core/AbstractJpaQuery.java

@@ -119,6 +119,18 @@ public Page<T> pageList(IPage iPage){
 
         return page;
     }
+    public Long count(){
+        Long count = (Long) createCriteria(true)
+                .setProjection(Projections.rowCount())
+                .uniqueResult();
+        return count;
+    }
+    public Long count(String field){
+        Projection property = Projections.count(field);
+
+        Long count = (Long) createCriteria(true).setProjection(property).uniqueResult();
+        return count;
+    }
     public <E>List<E> getObjList(Class<E> dto){
         return createCriteria().setResultTransformer(Transformers.aliasToBean(dto)).list();
     }

jpa-lambda-core/src/main/java/com/github/xuejike/query/jpa/lambda/core/SelectCriteria.java

@@ -9,10 +9,7 @@ default R select(F field){
     default R distinct(F field){
         return distinct(field,null);
     }
-    R count(F field,F alias);
-    default R count(F field){
-        return count(field,null);
-    }
+
     R max(F field,F alias);
     default R max(F field){return max(field,null);}