查询所有用户接口采用分页方式返回数据

HMS/src/main/java/com/hqyj/seven/controller/UserController.java

 package com.hqyj.seven.controller;
 
+import com.hqyj.seven.pojo.PageData;
 import com.hqyj.seven.pojo.User;
 import com.hqyj.seven.service.UserService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.bind.annotation.ResponseBody;
 
 import java.util.HashMap;
@@ -62,8 +64,20 @@ public class UserController {
     //查询所有用户
     @RequestMapping("/getAllUser")
     @ResponseBody
-    public Map<String, Object> getAllUser(){
-        List<User> userList =  userService.queryAllUser();
+    public Map<String, Object> getAllUser(@RequestParam("page") Integer pageNumber, @RequestParam("limit")Integer pageSize){
+        int number;
+        int size;
+        if (pageNumber == null){
+            number = 1;
+        }else {
+            number = pageNumber;
+        }
+        if (pageSize == null){
+            size = 10;
+        }else {
+            size = pageSize;
+        }
+        PageData<User> userList = userService.queryAllUser(number,size);
         Map<String, Object> result = new HashMap<>();
         if (userList == null){
             result.put("code",-1);

HMS/src/main/java/com/hqyj/seven/service/UserService.java

 package com.hqyj.seven.service;
 
+import com.hqyj.seven.pojo.PageData;
 import com.hqyj.seven.pojo.User;
 
 import java.util.List;
@@ -20,7 +21,7 @@ public interface UserService {
     List<User> searchUser(String  names);
 
     //查询所有用户
-    List<User> queryAllUser();
+    PageData<User> queryAllUser(int number, int size);
 
     //登录
     Map<String, Object> login(String username, String password);

HMS/src/main/java/com/hqyj/seven/service/impl/UserServiceImpl.java

 package com.hqyj.seven.service.impl;
 
+import com.github.pagehelper.PageHelper;
+import com.github.pagehelper.PageInfo;
 import com.hqyj.seven.dao.UserDao;
+import com.hqyj.seven.pojo.PageData;
 import com.hqyj.seven.pojo.User;
 import com.hqyj.seven.service.UserService;
 import com.hqyj.seven.utils.MD5Util;
@@ -37,8 +40,38 @@ public class UserServiceImpl implements UserService {
 
     //查询所有用户
     @Override
-    public List<User> queryAllUser() {
-        return userDao.queryAllUser();
+    public PageData<User> queryAllUser(int pageNumber, int pageSize) {
+        PageHelper.startPage(pageNumber,pageSize);
+        List<User> userList = userDao.queryAllUser();
+        PageInfo<User> pageInfo = new PageInfo<>(userList);
+        //创建我们自己的数据模型
+        PageData<User> pageData = new PageData<>();
+
+        pageData.setCurrentPage(pageNumber);
+        //设置每页数
+        pageData.setPageSize(pageSize);
+        //设置总页数
+        pageData.setTotalPage(pageInfo.getPages());
+        //设置总记录数
+        pageData.setTotalSize((int) pageInfo.getTotal());
+        if (pageInfo.isHasNextPage()){
+            //有下一页 设置下一页页码
+            pageData.setNextPage(pageInfo.getNextPage());
+        }else {
+            //没有下一页，设置尾页
+            pageData.setNextPage(pageInfo.getPages());
+        }
+        if (pageInfo.isHasPreviousPage()){
+            //有上一页 设置上一页页码
+            pageData.setPreviousPage(pageInfo.getPrePage());
+        }else {
+            //没有上一页，设置首页
+            pageData.setPreviousPage(1);
+        }
+        //设置用户信息
+        pageData.setList(pageInfo.getList());
+
+        return pageData;
     }
 
     //根据用户ID修改用户信息