[读书笔记] 四、SpringBoot中使用JPA 进行快速CRUD操作

通过Spring提供的JPA Hibernate实现，进行快速CRUD操作的一个栗子~。

视图用到了SpringBoot推荐的thymeleaf来解析，数据库使用的Mysql，代码详细我会贴在下面文章中，请大家参考借鉴。

一、数据库表结构

CREATE TABLE `spring_jpa_test_table` (
    `id` INT(11) NOT NULL AUTO_INCREMENT,
    `message` TEXT NULL,
    INDEX `id` (`id`)
)
ENGINE=InnoDB
;

二、POM.xml

<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>com.springboot</groupId>
    <artifactId>springboot_test1_1</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>springboot_test1_1</name>
    <url>http://maven.apache.org</url>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.2.RELEASE</version>
        <relativePath />
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-aop</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
    </dependencies>

    <build>
        <finalName>my-spring-boot</finalName>

        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <dependencies>
                    <dependency>
                        <groupId>org.springframework</groupId>
                        <artifactId>springloaded</artifactId>
                        <version>1.2.6.RELEASE</version>
                    </dependency>
                </dependencies>
            </plugin>
        </plugins>
    </build>

</project>

POM.xml

三、VO/PO

package core.vo;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name = "spring_jpa_test_table")
public class JpaTestTablePO {

    private int id;

    private String message;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    @Column(name = "message")
    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }
}

JpaTestTablePO.java

四、DAO

package core.dao;

import java.io.Serializable;
import java.util.List;

import org.springframework.data.jpa.repository.JpaRepository;

import core.vo.JpaTestTablePO;

public interface JpaTestTableDao extends
        JpaRepository<JpaTestTablePO, Serializable> {

    public List<JpaTestTablePO> findByMessageContaining(String message);

}

JpaTestTableDao.java

五、Service

package core.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import core.dao.JpaTestTableDao;
import core.vo.JpaTestTablePO;

@Service
public class TestService {

    @Autowired
    JpaTestTableDao jpaTestTableDao;

    // SpringBoot JPA 默认CRUD实现
    public void save(JpaTestTablePO po) {
        jpaTestTableDao.save(po);
    }

    public List<JpaTestTablePO> list() {
        return jpaTestTableDao.findAll();
    }

    public void delete(int id) {
        jpaTestTableDao.delete(id);
    }

    // SpringBoot JPA 简单查询
    public List<JpaTestTablePO> findByMessageContaining(String message) {
        return jpaTestTableDao.findByMessageContaining(message);
    }

}

TestService.java

六、Controller

package core;

import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

import core.service.TestService;
import core.vo.JpaTestTablePO;

@Controller
public class HomePageController {

    @Autowired
    TestService service;

    @RequestMapping(value = "/home", method = RequestMethod.GET)
    public String toIndex(Map<String, Object> model) {
        model.put("pos", service.list());
        return "index";
    }

    @RequestMapping(value = "/home", method = RequestMethod.POST)
    public String toIndex2(JpaTestTablePO po, Map<String, Object> model) {
        model.put("pos", service.findByMessageContaining(po.getMessage()));
        return "index";
    }

    @RequestMapping(value = "/save", method = RequestMethod.POST)
    public ModelAndView save(JpaTestTablePO po) {
        service.save(po);
        return new ModelAndView("redirect:/home");
    }

    @RequestMapping(value = "/delete/{id}", method = RequestMethod.GET)
    public ModelAndView delete(@PathVariable("id") String id) {
        service.delete(Integer.parseInt(id));
        return new ModelAndView("redirect:/home");
    }
}

HomePageController.java

七、application.properties

spring.datasource.url = jdbc:mysql://localhost:3306/test
spring.datasource.username = root
spring.datasource.password = root
spring.datasource.driverClassName = com.mysql.jdbc.Driver
# Specify the DBMS
spring.jpa.database = MYSQL
# Show or not log for each sql query
spring.jpa.show-sql = true
# Hibernate ddl auto (create, create-drop, update)
spring.jpa.hibernate.ddl-auto = update
# Naming strategy
spring.jpa.hibernate.naming-strategy = org.hibernate.cfg.ImprovedNamingStrategy

# stripped before adding them to the entity manager)
spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.MySQL5Dialect

#spring.thymeleaf.prefix=classpath:/templates/
#spring.thymeleaf.suffix=.html
#spring.thymeleaf.mode=HTML5
#spring.thymeleaf.encoding=UTF-8
# ;charset=<encoding> is added
#spring.thymeleaf.content-type=text/html
# set to false for hot refresh  

spring.thymeleaf.cache=false 

application.properties

八、index.html

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
    xmlns:th="http://www.thymeleaf.org"
    xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<script
    src="http://cdn.static.runoob.com/libs/angular.js/1.4.6/angular.min.js"></script>
<script type="text/javascript">
    var app = angular.module('myApp', []);
    app.controller('myCtrl', function($scope) {
        $scope.txtChange = function() {

        }
    });
</script>
</head>
<body>
    <p th:text="${hello}"></p>
    <!-- SEARCH TABLE -->
    <form action="http://localhost:8080/home" method="post">
        <p>
            Search Condition: <input type="text" name="message"/>&nbsp;&nbsp;<input type="submit" value="Search" />
        </p>
    </form>

    <br />
    <table border="1" width="400">
        <tr>
            <th colspan="3" align="center">Messages</th>
        </tr>
        <tr>
            <td>Id</td>
            <td>Message</td>
            <td>Opt</td>
        </tr>
        <tr th:each="m,index: ${pos}">
            <td th:text="${index.index}+1"></td>
            <td th:text="${m.message}"></td>
            <td><a th:href="'/delete/' + ${m.id }">delete</a></td>
        </tr>
    </table>
    <br />

    <div ng-app="myApp">
        <div ng-controller="myCtrl">
            <form action="http://localhost:8080/save" method="post">
                <p>
                    Message: <input type="text" name="message" ng-model="message"
                        ng-blur="txtChange();" />&nbsp;&nbsp;<input type="submit"
                        value="Save" />
                </p>
            </form>
        </div>
    </div>
</body>

</html>

index.html

项目目录结构：