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

网友投稿 292 2023-02-14


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

nexus-aliyun

central

Nexus aliyun

http://maven.aliyun.com/nexus/content/groups/public

2、全局JDK配置

jdk18

true

1.8

1.8

1.8

1.8

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

xmlns:xsi="http://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">

4.0.0

cn.temptation

studySpringBoot

1.0-SNAPSHOT

org.springframework.boot

spring-boot-starter-parent

2.0.0.RELEASE

org.springframework.boot

spring-boot-starter-web

org.springframework.boot

spring-boot-starter-thymeleaf

mysql

mysql-connector-java

5.1.21

org.springframework.boot

spring-boot-starter-data-jpa

xmlns:xsi="http://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">

4.0.0

cn.temptation

studySpringBoot

1.0-SNAPSHOT

org.springframework.boot

spring-boot-starter-parent

2.0.0.RELEASE

org.springframework.boot

spring-boot-starter-web

org.springframework.boot

spring-boot-starter-thymeleaf

mysql

mysql-connector-java

5.1.21

org.springframework.boot

spring-boot-starter-data-jpa

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 {

}

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 list = categoryDao.findAllhlFQkhM();

//

// 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 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)

新增

编辑  

删除

[首页]  

[上页]  

[下页]  

[末页]

类别新增页面(categoryinit.html)


类别编辑页面(categoryedit.html)



六、启动项目,运行效果如下

总结

以上所述是给大家介绍的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,会及时回复大家的。在此也非常感谢大家对我们网站的支持!


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