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/testspring.datasource.username=rootspring.datasource.password=saspring.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;@SpringBootApplicationpublic 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;@Controllerpublic 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，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对武林网网站的支持！