Question

我工作的一个编程项目，我必须创建服务器应用程序提供通过REST API的前端独立客户端的数据模型（MySQL的）。我已经成功地初始化春季使用Web，MySQL和RestRepositories和JPA的依赖，连接到我的数据库。我创建了“球员”，并与一些属性的“团队”表，通过创建球员和团队的类和接口都与@RepositoryRestResource。不使用任何控制器。在IntelliJ IDEA的工作2018年3月4日（终极版）

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>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.example</groupId>
    <artifactId>springboot-restapi</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springboot-restapi</name>
    <description>SpringBoot REST API project for Programming Laboratories</description>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-jpa</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-integration</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-thymeleaf</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

application.properties：

# DataSource properties
spring.datasource.url = jdbc:mysql://localhost:3306/mysql1?useUnicode=true&useJDBCCompliantTimezoneShift=true&useLegacyDatetimeCode=false&serverTimezone=UTC
spring.datasource.username = hello
spring.datasource.password = hello3
spring.datasource.driver-class-name = com.mysql.cj.jdbc.Driver

# Hibernate properties (create; MySQL8.x)
spring.jpa.hibernate.ddl-auto=create-drop
spring.jooq.sql-dialect=org.hibernate.dialect.MySQL8Dialect

Player.class：

package com.example.springbootrestapi.domain;

import javax.persistence.*;
import javax.validation.constraints.NotNull;

@Entity
@Table(name="player")
public class Player {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column
    private int id;

    @NotNull
    @Column
    private String nick;

    @NotNull
    @Column
    private int matches;

    @NotNull
    @Column
    private int wins;

    @NotNull
    @Column
    private int kills;

    public Player(@NotNull String nick, @NotNull int matches, @NotNull int wins, @NotNull int kills, Team team) {
        this.nick = nick;
        this.matches = matches;
        this.wins = wins;
        this.kills = kills;
    }

    public int getId() {
        return id;
    }

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

    public String getNick() {
        return nick;
    }

    public void setNick(String nick) {
        this.nick = nick;
    }

    public int getMatches() {
        return matches;
    }

    public void setMatches(int matches) {
        this.matches = matches;
    }

    public int getWins() {
        return wins;
    }

    public void setWins(int wins) {
        this.wins = wins;
    }

    public int getKills() {
        return kills;
    }

    public void setKills(int kills) {
        this.kills = kills;
    }
}

Team.class：

package com.example.springbootrestapi.domain;

import javax.persistence.*;
import javax.validation.constraints.NotNull;
import java.util.Set;

@Entity
@Table(name="team")
public class Team {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column
    private int teamId;

    @NotNull
    @Column(name = "teamName")
    private String teamName;

    @NotNull
    @Column
    private int noTeamMembers;

    @NotNull
    @Column
    private int teamMatches;

    @NotNull
    @Column
    private int teamWins;

    @NotNull
    @Column
    private int teamPlacement;

    public Team() { }

    public String getTeamName() {
        return teamName;
    }

    public void setTeamName(String teamName) {
        this.teamName = teamName;
    }

    public int getNoTeamMembers() {
        return noTeamMembers;
    }

    public void setNoTeamMembers(int noTeamMembers) {
        this.noTeamMembers = noTeamMembers;
    }

    public int getTeamMatches() {
        return teamMatches;
    }

    public void setTeamMatches(int teamMatches) {
        this.teamMatches = teamMatches;
    }

    public int getTeamWins() {
        return teamWins;
    }

    public void setTeamWins(int teamWins) {
        this.teamWins = teamWins;
    }

    public int getTeamPlacement() {
        return teamPlacement;
    }

    public void setTeamPlacement(int teamPlacement) {
        this.teamPlacement = teamPlacement;
    }
}

我想创建一个一到球队和球员之间有很多的映射，当我提出这意味着一个的 PUT本地主机：8080 /播放/ 1 的使用JSON车身请求我把价值的队名的（不，我Players.class尚未存在的字符串），它会链接到这个的团队名称的团队表（noTeamMembers将是由1递增）

还！

如何确保Player中的匹配不能大于Team中的 teamMatches ，与 wins 相同？

对不起，如果我说错了，希望一切都清楚了。我是Spring的初学者。

JPA / Hibernate的一对多测绘队 - >播放器

0 个答案: