idea導入java項目后如何配置并運行，Interllij IDEA 搭建Springboot（一）

Spring Boot是由Pivotal團隊提供的全新框架，其設計目的是用來簡化新Spring應用的初始搭建以及開發過程。該框架使用了特定的方式來進行配置，從而使開發人員不再需要定義樣板化的配置。通過這種方式，Spring Boot致力于在蓬勃發展的快速應用開發領域(rapid application development)成為領導者。

springboot的概念：

從最根本上來講，Spring Boot就是一些庫的集合，它能夠被任意項目的構建系統所使用。簡便起見，該框架也提供了命令行界面，它可以用來運行和測試Boot應用。框架的發布版本，包括集成的CLI（命令行界面），可以在Spring倉庫中手動下載和安裝。

• 創建獨立的Spring應用程序
• 嵌入的Tomcat，無需部署WAR文件
• 簡化Maven配置
• 自動配置Spring
• 提供生產就緒型功能，如指標，健康檢查和外部配置
• 絕對沒有代碼生成并且對XML也沒有配置要求

idea導入java項目后如何配置并運行、搭建springboot：

可以在官網https://start.spring.io/生成spring boot的模板。如下圖

idea配置springboot？

解壓之后idea導入這個項目就ok；

接入mybatis：

MyBatis 是一款優秀的持久層框架，它支持定制化 SQL、存儲過程以及高級映射。

搭建一個springboot項目。在項目對象模型pom.xml中插入mybatis的配置

<dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>1.1.1</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.30</version> </dependency>

<dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>1.1.1</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>5.1.30</version></dependency>

創建數據庫以及user表：

CREATE TABLE `users` (`id` int(10) unsigned NOT NULL AUTO_INCREMENT,`username` varchar(255) NOT NULL,`age` int(10) NOT NULL,`phone` bigint NOT NULL,`email` varchar(255) NOT NULL,PRIMARY KEY (`id`)
)ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

分別創建三個包，分別是dao/pojo/service, 目錄如下

yml和properties優先哪個、

添加User：

package com.athm.pojo;/*** Created by toutou on 2018/9/15.*/
public class User {private int id;private String username;private Integer age;private Integer phone;private String email;public int getId() {return id;}public void setId(int id) {this.id = id;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public Integer getAge() {return age;}public void setAge(Integer age) {this.age = age;}public Integer getPhone() {return phone;}public void setPhone(Integer phone) {this.phone = phone;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}
}

添加UserMapper：

package com.athm.dao;import com.athm.pojo.User;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Select;import java.util.List;/*** Created by toutou on 2018/9/15.*/
@Mapper
public interface UserMapper {@Select("SELECT id,username,age,phone,email FROM USERS WHERE AGE=#{age}")List<User> getUser(int age);
}

添加UserService：

package com.athm.service;import com.athm.pojo.User;import java.util.List;/*** Created by toutou on 2018/9/15.*/
public interface UserService {List<User> getUser(int age);
}

Spring的配置文件？添加UserServiceImpl：

package com.athm.service;import com.athm.dao.UserMapper;
import com.athm.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;import java.util.List;/*** Created by toutou on 2018/9/15.*/
@Service
public class UserServiceImpl implements UserService{@AutowiredUserMapper userMapper;@Overridepublic List<User> getUser(int age){return userMapper.getUser(age);}
}

controller添加API方法：

package com.athm.controller;import com.athm.pojo.User;
import com.athm.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;import java.util.HashMap;
import java.util.List;
import java.util.Map;/*** Created by toutou on 2018/9/15.*/
@RestController
public class IndexController {@AutowiredUserService userService;@GetMapping("/show")public List<User> getUser(int age){return userService.getUser(age);}@RequestMapping("/index")public Map<String, String> Index(){Map map = new HashMap<String, String>();map.put("北京","北方城市");map.put("深圳","南方城市");return map;}
}

修改租車ZucheApplication：

package com.athm.zuche;import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.ComponentScan;@SpringBootApplication
@ComponentScan(basePackages = {"com.athm.controller","com.athm.service"})
@MapperScan(basePackages = {"com.athm.dao"})
public class ZucheApplication {public static void main(String[] args) {SpringApplication.run(ZucheApplication.class, args);}
}

添加數據庫連接相關配置，application.properties：

spring.datasource.url=jdbc:mysql://localhost:3306/zuche
spring.datasource.username=toutou
spring.datasource.password=*******
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

如何用intellij idea寫java？application：

package com.htt.taotao;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;@SpringBootApplication
@ComponentScan(basepackages={"com.taotao.cotroller","com.taotao.service"})
@MapperScan(basepackages={"com.taotao.dao"})
public class TaotaoApplication {public static void main(String[] args) {SpringApplication.run(TaotaoApplication.class, args);}
}

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