springboot添加操作

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Mybaits技术连接数据库

resources

#update tomcat port
server.port=8888

#config datasource(mysql)
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql:///springboot
spring.datasource.username=root
spring.datasource.password=秘密

#config mybatis xml
mybatis.mapper-location=classpath:mapping/*.xml
mybatis.type-aliases-package=cn.java.entit     

创建数据库

DDL信息

Create Table

CREATE TABLE `foods` (
  `id` bigint(20) NOT NULL AUTO_INCREMENT COMMENT '主键',
  `food_name` varchar(40) DEFAULT NULL COMMENT '食品名',
  `food_taste` varchar(2) DEFAULT NULL COMMENT '食品口味 1香辣 2微辣 3麻辣 4不辣',
  `food_price` float(10,2) DEFAULT NULL COMMENT '食品价格',
  `food_description` varchar(200) DEFAULT NULL COMMENT '食品描述',
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8

INSERT INTO foods(food_name,food_taste,food_price,food_description) VALUES('鱼香肉丝','1',18.5,'很好吃'); 

DAO层

实体类    cn.java.entity       Food.java

package cn.java.entity;

import lombok.Getter;
import lombok.Setter;
import lombok.ToString;

@Getter
@Setter
@ToString
public class Food {
    private Long id;
    private String foodName;
    private String foodTaste;
    private Float foodPrice;
    private String foodDescription;
}

映射mapper    cn.java.mapper  FoodMaper.java

package cn.java.mapper;

import cn.java.entity.Food;
import org.apache.ibatis.annotations.Insert;

/*
增删改返回值为数字  所以设置int
食品  添加数据  DAO层完成
 */
public interface FoodMapper {
    @Insert("INSERT INTO foods(food_name,food_taste,food_price,food_description) VALUES(#{foodName},#{foodTaste},#{foodPrice},#{foodDescription})")
    int addFood(Food food);
}

 业务层

cn.java.service     FoodService.java  接口

package cn.java.service;

import cn.java.entity.Food;

/*
添加食品
 */
public interface FoodService {
    boolean saveFood(Food food);
}

实现类  cn.java.service.impl    FoodServiceImpl   实现接口 FoodService

package cn.java.service.impl;

import cn.java.entity.Food;
import cn.java.mapper.FoodMapper;
import cn.java.service.FoodService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class FoodServiceImpl implements FoodService {
    @Autowired
    private FoodMapper foodMapper;
    @Override
    public boolean saveFood(Food food) {
        return foodMapper.addFood(food) >=1 ? true : false;    //业务方法     若是项目记者校验数据格式
    }
}

控制层

cn.java.controller

FoodController.java

package cn.java.controller;

import cn.java.service.FoodService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import cn.java.entity.Food;
/*
添加食品           项目开发  多添加注释
 */
@Controller      //添加@Controller  才是一个Controller
public class FoodController {
    @Autowired
    private FoodService foodService;
@RequestMapping("/insertFood.do")   //添加虚拟路径
@ResponseBody
    public boolean insertFood(Food food) {
        return foodService.saveFood(food);
    }

}

 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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>springboot2</groupId>
    <artifactId>dingpeng_springboot2</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>dingpeng_springboot2 Maven Webapp</name>
    <url>http://maven.apache.org</url>

    <!-- 配置 spring boot 所需的依赖包 -->
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>1.5.10.RELEASE</version>

    </parent>

    <dependencies>
        <!-- springboot 相关启动 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>

        <!-- spring boot热部署 为开发者提供了一个名为spring-boot-devtools的模块来使用Spring boot 应用支持热部署
            提高开发者的开发效率无需手动重启Spring boot 应用 -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <optional>true</optional>
        </dependency>

        <!-- log4j -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
        </dependency>

        <!-- 使用Jasper 引擎解析JSP -->
        <dependency>
            <groupId>org.apache.tomcat.embed</groupId>
            <artifactId>tomcat-embed-jasper</artifactId>
            <scope>provided</scope>
        </dependency>

        <!-- JSP 支持 -->
        <!-- servlet 依赖 -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
        </dependency>

        <!-- spring boot 整合mybatis -->
        <dependency>
            <groupId>org.mybatis.spring.boot</groupId>
            <artifactId>mybatis-spring-boot-starter</artifactId>
            <version>1.3.0</version>
        </dependency>
        <!-- MYSQL -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
        </dependency>

        <!-- lombok -->
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <version>1.16.16</version>
            <scope>provided</scope>
        </dependency>

        <!-- 加入p6spy的依赖 -->
        <!-- https://mvnrepository.com/artifact/p6spy/p6spy -->
        <!--<dependency>
            <groupId>p6spy</groupId>
            <artifactId>p6spy</artifactId>
            <version>2.1.4</version>
        </dependency>-->

    <!--     druid 数据库连接池
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.10</version>
        </dependency>-->
    </dependencies>

    <!-- 简化部署 这个插件，可将应用打包成一个可执行的jar包 -->
    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <!-- 没有这个配置， devtools 不生效 -->
                    <fork>true</fork>
                </configuration>
            </plugin>
        </plugins>
        <finalName>dingpeng_springboot2</finalName>
    </build>

</project>

使用的工具

Postman

结构图