Spring boot分頁顯示資料(1)
阿新 • • 發佈：2018-12-23
spring boot分頁顯示資料（1）
記錄一下~
我們從簡入繁，先使用一種通過頁面重新整理來實現分頁資料展示的方法~
下面是一個簡單的栗子
使用工具：spring-data-jpa,thymeleaf
實體類: 實體類中不要忘記定義空的構造方法哦~否則會出錯
package com.example.demo.domain;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
/**
* Created by 18274 on 2017/9/18.
*/ PersonRepository類
package com.example.demo.dao;
import com.example.demo.domain.Person;
import org.springframework.data.jpa.repository.JpaRepository;
import java.util.List;
/**
* Created by 18274 on 2017/9/18.
*/
public interface PersonRepository Control控制層:
測試頁面中我們設定了每頁展示的資料條數為5條，可以根據需求在
long top1=top/5+1 中進行修改，比如改為long top1=top/6+1,則頁面最多顯示的資料條數將變為6條
package com.example.demo.control;
import com.example.demo.dao.PersonRepository;
import com.example.demo.domain.Person;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import java.util.ArrayList;
import java.util.List;
/**
* Created by 18274 on 2017/9/18.
*/
@Controller
public class Control {
@Autowired
PersonRepository personRepository;
@RequestMapping(value="/fenye")
public String fenye(@RequestParam(value="number",defaultValue = "1") long number,
Model model){
List<Person> person=personRepository.findAll();
long top=(long) person.size();
long top1=top/5+1;
if(number==0)
number=1L;
if(number==top1+1)
number=top1;
long di=(number-1)*5+1;
long gao=number*5;
List<Person> persons=personRepository.findByIdBetween(di,gao);
model.addAttribute("persons",persons);
model.addAttribute("number",number);
model.addAttribute("top1",top1);
System.out.println(number);
return "fenye";
}
}
MySql資料庫中對應的Person表
fenye.html
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8"/>
<title>Title</title>
</head>
<body>
<ul class="list-group">
<li class="list-group-item" th:each="person:${persons}">
<span th:text="${person.name}"></span>
</li>
</ul>
<div>
<!--頁碼-->
<a th:href="@{/fenye(number=1)}">1</a>
<a th:href="@{/fenye(number=2)}">2</a>
<a th:href="@{/fenye(number=3)}">3</a>
<span th:if="${number} ge 10">...</span>
<span th:each="i :${#numbers.sequence(1,top1)}">
<a th:if="(${i} le ${number}+3 and ${i} le ${top1}-3) and (${i} ge ${number}-3 and ${i} ge 4)" th:href="@{/fenye(number=${i})}" th:text="${i}"></a>
</span>
<span th:if="${number} le ${top1}-10">...</span>
<a th:href="@{/fenye(number=${top1}-2)}" th:text="${top1}-2">1</a>
<a th:href="@{/fenye(number=${top1}-1)}" th:text="${top1}-1">1</a>
<a th:href="@{/fenye(number=${top1})}" th:text="${top1}"></a>
<a th:href="@{/fenye(number=${number}-1)}">上一頁</a>
<a th:href="@{/fenye(number=${number}+1)}">下一頁</a>
</div>
</body>
</html>
<!--分頁顯示資料-->生成頁面展示:
頁面做的很簡單~沒有新增樣式~
頁面中的頁碼是通過thymeleaf來實現的，設計的比較簡單~