IPageSysUserEntity分页查询Java怎么写

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：

import org.springframework.data.domain.Page;
import org.springframework.data.domain.Pageable;
import org.springframework.data.jpa.repository.JpaRepository;

public interface SysUserRepository extends JpaRepository<SysUserEntity, Long> {
    Page<SysUserEntity> findAll(Pageable pageable);
}

然后，在Service层中调用该方法进行分页查询：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.data.domain.PageRequest;
import org.springframework.stereotype.Service;

@Service
public class SysUserService {
    @Autowired
    private SysUserRepository sysUserRepository;

    public Page<SysUserEntity> getUsers(int pageNum, int pageSize) {
        Pageable pageable = PageRequest.of(pageNum, pageSize);
        return sysUserRepository.findAll(pageable);
    }
}

在Controller层中调用Service层的方法，获取分页结果：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Page;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class SysUserController {
    @Autowired
    private SysUserService sysUserService;

    @GetMapping("/users")
    public Page<SysUserEntity> getUsers(@RequestParam(defaultValue = "0") int pageNum,
                                       @RequestParam(defaultValue = "10") int pageSize) {
        return sysUserService.getUsers(pageNum, pageSize);
    }
}

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