spring boot 的一些高级用法

1　　spring boot 项目的创建

参考 https://www.cnblogs.com/PerZhu/p/10708809.html

2　　首先我们先把Maven里面的配置完成

 <dependencies>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-actuator</artifactId>
         </dependency>
         <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-data-jpa</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>org.mybatis.spring.boot</groupId>
             <artifactId>mybatis-spring-boot-starter</artifactId>
             <version>2.0.1</version>
         </dependency>

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

3　　属性配置建议使用application.yml，里面用来配置数据库的连接，还有数据库里面表的创建方式，和端口号的选择

Controller处理http注解

Controller需要和模板一起使用（简单了解即可），首先需要在maven里面加入

 <dependency>
             <groupId>org.springframework.boot</groupId>
             <artifactId>spring-boot-starter-thymeleaf</artifactId>
         </dependency>

4　　URL 注解的使用

5　　数据库的操作

首先添加注解

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

创建一个Girl类来对应数据库里面的表

 package com.zzy;

 import javax.persistence.Entity;
 import javax.persistence.GeneratedValue;
 import javax.persistence.Id;

 @Entity

 public class Girl {
     @Id
     @GeneratedValue
     private Integer id;

     private Integer age;

     private String height;

     public Girl() {
     }

     public Integer getId() {
         return id;
     }

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

     public String getHeight() {
         return height;
     }

     public void setHeight(String height) {
         this.height = height;
     }

     public Integer getAge() {
         return age;
     }

     public void setAge(Integer age) {
         this.age = age;
     }

     @Override
     public String toString() {
         return "Girl{" +
                 "id=" + id +
                 ", age=" + age +
                 ", height='" + height + '\'' +
                 '}';
     }
 }

创建刚开始的几个接口

创建一个接口

添加一个女生

查询一个女生

更新一条记录

删除一条记录

数据库的增，更，删，填，都具备了

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