IDEA+maven+SpringBoot+JPA+Thymeleaf实现Crud及分页

一、开发环境：

1、windows 7 企业版

2、idea 14

3、jdk 1.8

4、maven 3.5.2

5、mariadb

6、sqlyog

二、maven设置：

maven目录下的conf目录下的settings.xml做如下内容的添加：

1、使用阿里云的仓库，比官网访问速度快很多

 <mirror>
 <id>nexus-aliyun</id>
 <mirrorof>central</mirrorof>
 <name>nexus aliyun</name>
<url>http://maven.aliyun.com/nexus/content/groups/public</url>
</mirror>

2、全局jdk配置

<!-- 全局jdk配置，settings.xml --> 
<profile> 
 <id>jdk18</id> 
 <activation> 
 <activebydefault>true</activebydefault> 
 <jdk>1.8</jdk> 
 </activation> 
 <properties> 
 <maven.compiler.source>1.8</maven.compiler.source> 
 <maven.compiler.target>1.8</maven.compiler.target> 
 <maven.compiler.compilerversion>1.8</maven.compiler.compilerversion> 
 </properties> 
</profile>

三、idea基本设置：

1、maven设置：选择maven目录，同时配置文件和本地仓库

2、字符编码设置

四、使用idea创建maven工程：

选择enable auto-import，创建好的工程目录如下图：

五、体验springboot结合jpa的快速开发吧

1、pom.xml

<?xml version="1.0" encoding="utf-8"?>
<project xmlns="http://maven.apache.org/pom/4.0.0"
 xmlns:xsi="http://www.w3.org/2001/xmlschema-instance"
 xsi:schemalocation="http://maven.apache.org/pom/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 <modelversion>4.0.0</modelversion>
 <groupid>cn.temptation</groupid>
 <artifactid>studyspringboot</artifactid>
 <version>1.0-snapshot</version>
 <!-- 使用spring boot的默认设置 -->
 <parent>
 <groupid>org.springframework.boot</groupid>
 <artifactid>spring-boot-starter-parent</artifactid>
 <version>2.0.0.release</version>
 </parent>
 <dependencies>
 <!-- web -->
 <dependency>
 <groupid>org.springframework.boot</groupid>
 <artifactid>spring-boot-starter-web</artifactid>
 </dependency>
 <!-- thymeleaf -->
 <dependency>
 <groupid>org.springframework.boot</groupid>
 <artifactid>spring-boot-starter-thymeleaf</artifactid>
 </dependency>
 <!-- mysql-->
 <dependency>
 <groupid>mysql</groupid>
 <artifactid>mysql-connector-java</artifactid>
 <version>5.1.21</version>
 </dependency>
 <!-- jpa-->
 <dependency>
 <groupid>org.springframework.boot</groupid>
 <artifactid>spring-boot-starter-data-jpa</artifactid>
 </dependency>
 </dependencies>
</project>

2、resources目录下新建application.properties（当然喜欢用yaml的可以用yaml）

# 数据库连接
spring.datasource.url=jdbc:mysql://127.0.0.1:3306/test
spring.datasource.username=root
spring.datasource.password=sa
spring.datasource.driver-class-name=com.mysql.jdbc.driver
# jpa配置
spring.jpa.properties.hibernate.hbm2ddl.auto=update

3、创建springboot程序启动类springbootapplication.java

package cn.temptation;

import org.springframework.boot.springapplication;
import org.springframework.boot.autoconfigure.springbootapplication;

@springbootapplication
public class springbootapplication {
 public static void main(string[] args) {
 // springboot项目启动
 springapplication.run(springbootapplication.class, args);
 }
}

4、创建实体类category.java

package cn.temptation.model;
import javax.persistence.*;
// 建库建表
//drop table category;
//
//create table category
//(
// categoryid int auto_increment primary key,
// categoryname varchar(10) not null
//);
//
//insert into category values(null, '手机'), (null, '图书'), (null, '服装'), (null, '鞋帽');
//
//select * from category;
@entity
@table(name = "category")
public class category {
 @id
 @generatedvalue(strategy = generationtype.identity)
 @column(name = "categoryid")
 private integer categoryid;
 @column(name = "categoryname")
 private string categoryname;
 public integer getcategoryid() {
 return categoryid;
 }
 public void setcategoryid(integer categoryid) {
 this.categoryid = categoryid;
 }
 public string getcategoryname() {
 return categoryname;
 }
 public void setcategoryname(string categoryname) {
 this.categoryname = categoryname;
 }
}

5、创建dao接口categorydao.java

package cn.temptation.dao;
import cn.temptation.model.category;
import org.springframework.data.jpa.repository.jparepository;
public interface categorydao extends jparepository<category, integer> {
}

6、创建控制器类categorycontroller.java

package cn.temptation.web;
import cn.temptation.dao.categorydao;
import cn.temptation.model.category;
import org.springframework.beans.factory.annotation.autowired;
import org.springframework.data.domain.page;
import org.springframework.data.domain.pagerequest;
import org.springframework.data.domain.pageable;
import org.springframework.data.domain.sort;
import org.springframework.stereotype.controller;
import org.springframework.web.bind.annotation.requestmapping;
import org.springframework.web.bind.annotation.requestparam;
import org.springframework.web.servlet.modelandview;
import java.util.list;
@controller
public class categorycontroller {
 @autowired
 private categorydao categorydao;
 /**
 * 不分页查询
 *
 * @return
 */
// @requestmapping("/categorylist")
// public modelandview categorylist() {
// list<category> list = categorydao.findall();
//
// modelandview mav = new modelandview("categorylist");
// mav.addobject("list", list);
// return mav;
// }
 /**
 * 分页查询
 *
 * @return
 */
 @requestmapping("/categorylist")
 public modelandview categorylist(@requestparam(value = "start", defaultvalue = "0") integer start,
   @requestparam(value = "limit", defaultvalue = "2") integer limit) {
 start = start < 0 ? 0 : start;
 sort sort = new sort(sort.default_direction, "categoryid");
 pageable pageable = new pagerequest(start, limit, sort);
 page<category> page = categorydao.findall(pageable);
// system.out.println(page.getnumber());
// system.out.println(page.getnumberofelements());
// system.out.println(page.getsize());
// system.out.println(page.gettotalelements());
// system.out.println(page.gettotalpages());
// system.out.println(page.isfirst());
// system.out.println(page.islast());
 modelandview mav = new modelandview("categorylist");
 mav.addobject("page", page);
 return mav;
 }
 /**
 * 类别新增视图
 * @return
 */
 @requestmapping("/categoryinit")
 public string categoryinit() {
 return "categoryinit";
 }
 /**
 * 类别新增操作
 * @param model
 * @return
 */
 @requestmapping("/categoryinsert")
 public string categoryinsert(category model) {
 categorydao.save(model);
 return "redirect:categorylist";
 }
 /**
 * 类别删除操作
 * @param categoryid
 * @return
 */
 @requestmapping("/categorydelete")
 public string categorydelete(integer categoryid) {
 categorydao.deletebyid(categoryid);
 return "redirect:categorylist";
 }
 /**
 * 类别编辑视图
 * @param categoryid
 * @return
 */
 @requestmapping("/categoryedit")
 public modelandview categoryedit(integer categoryid) {
 category model = categorydao.getone(categoryid);
 modelandview mav = new modelandview("categoryedit");
 mav.addobject("category", model);
 return mav;
 }
 /**
 * 类别编辑操作
 * @param model
 * @return
 */
 @requestmapping("/categoryupdate")
 public string categoryupdate(category model) {
 categorydao.save(model);
 return "redirect:categorylist";
 }
}

7、resources目录下新建templates目录，创建表现层：类别列表页面（categorylist.html）、类别新增页面（categoryinit.html）、类别编辑页面（categoryedit.html）

类别列表页面（categorylist.html）

<!doctype html>
<html lang="en">
<head>
 <meta charset="utf-8">
 <title>类别列表</title>
 <style>
 table, th, td {
 border: 1px solid green;
 border-collapse: collapse;
 }
 </style>
</head>
<body>
<a th:href="@{/categoryinit}">新增</a>
<table>
 <tr>
 <th>类别编号</th>
 <th>类别名称</th>
 <th>操  作</th>
 </tr>
 <!--不分页遍历-->
 <!--<tr th:each="item : ${list}">-->
 <!--分页遍历-->
 <tr th:each="item : ${page.content}">
 <td th:text="${item.categoryid}">类别编号</td>
 <td th:text="${item.categoryname}">类别名称</td>
 <td>
 <a th:href="@{/categoryedit(categoryid=${item.categoryid})}">编辑</a>  
 <a th:href="@{/categorydelete(categoryid=${item.categoryid})}">删除</a>
 </td>
 </tr>
</table>
<div>
 <a th:href="@{/categorylist(start=0)}">[首页]</a>  
 <a th:if="${not page.isfirst()}" th:href="@{/categorylist(start=${page.number-1})}">[上页]</a>  
 <a th:if="${not page.islast()}" th:href="@{/categorylist(start=${page.number+1})}">[下页]</a>  
 <a th:href="@{/categorylist(start=${page.totalpages-1})}">[末页]</a>
</div>
</body>
</html>

类别新增页面（categoryinit.html）

<!doctype html>
<html lang="en">
<head>
 <meta charset="utf-8">
 <title>类别新增</title>
</head>
<body>
<form action="categoryinsert" method="post">
 <label for="txtcategoryname">类别名称：</label>
 <input type="text" id="txtcategoryname" name="categoryname" /><br/>
 <input type="submit" value="提交">
</form>
</body>
</html>

类别编辑页面（categoryedit.html）

<!doctype html>
<html lang="en">
<head>
 <meta charset="utf-8">
 <title>类别编辑</title>
</head>
<body>
<form action="categoryupdate" method="post">
 <input type="hidden" id="txtcategoryid" name="categoryid" th:field="${category.categoryid}"/><br/>
 <label for="txtcategoryname">类别名称：</label>
 <input type="text" id="txtcategoryname" name="categoryname" th:field="${category.categoryname}"/><br/>
 <input type="submit" value="提交">
</form>
</body>
</html>

六、启动项目，运行效果如下

总结

以上所述是小编给大家介绍的idea+maven+springboot+jpa+thymeleaf实现crud及分页，希望对大家有所帮助