Specification 查询

// 1、继承 JpaSpecificationExecutor 接口
extends JpaSpecificationExecutor<TestEntity>
// 2、编写条件
Specification<TestEntity> specification = (root, criteriaQuery, criteriaBuilder) -> {
    Predicate pre1 = criteriaBuilder.like(root.get("field1"), "%" + keyword + "%");
    Predicate pre2 = criteriaBuilder.equal(root.get("field2"), keyword]);
    // where field1 like '%keyword%' or field2 = 'keyword'
    return criteriaBuilder.or(pre1, pre2);
}
// 3、执行查询
TestRepository.findAll(specification);

Spring Data Jpa：分页、Specification、Criteria