Java分页查询：Spring Data JPA示例 | 实现高效数据获取

在Java中，可以使用分页查询功能，例如使用Spring Data JPA或者MyBatis等持久化框架。下面是使用Spring Data JPA进行分页查询的示例代码：\n\njava\nimport org.springframework.data.domain.Page;\nimport org.springframework.data.domain.Pageable;\nimport org.springframework.data.jpa.repository.JpaRepository;\n\npublic interface SysUserRepository extends JpaRepository<SysUserEntity, Long> {\n Page<SysUserEntity> findAll(Pageable pageable);\n}\n\n\n然后，在Service层中调用该方法进行分页查询：\n\njava\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.data.domain.Page;\nimport org.springframework.data.domain.PageRequest;\nimport org.springframework.stereotype.Service;\n\n@Service\npublic class SysUserService {\n @Autowired\n private SysUserRepository sysUserRepository;\n\n public Page<SysUserEntity> getUsers(int pageNum, int pageSize) {\n Pageable pageable = PageRequest.of(pageNum, pageSize);\n return sysUserRepository.findAll(pageable);\n }\n}\n\n\n在Controller层中调用Service层的方法，获取分页结果：\n\njava\nimport org.springframework.beans.factory.annotation.Autowired;\nimport org.springframework.data.domain.Page;\nimport org.springframework.web.bind.annotation.GetMapping;\nimport org.springframework.web.bind.annotation.RequestParam;\nimport org.springframework.web.bind.annotation.RestController;\n\n@RestController\npublic class SysUserController {\n @Autowired\n private SysUserService sysUserService;\n\n @GetMapping("/users")\n public Page<SysUserEntity> getUsers(@RequestParam(defaultValue = "0") int pageNum,\n @RequestParam(defaultValue = "10") int pageSize) {\n return sysUserService.getUsers(pageNum, pageSize);\n }\n}\n\n\n以上代码演示了如何使用Spring Data JPA进行分页查询。如果使用其他持久化框架，可以根据具体框架的文档和API进行相应的操作。