SpringBoot快速搭建web项目详细步骤总结

@RestController
public class HelloSpringBoot {
  @RequestMapping(path = {"/helloSpringBoot"})
  public String HelloSpring (){
    System.out.println("hello spring boot");
    return "hello spring boot";
  }
}

spring.datasource.url=jdbc:mysql://localhost:3306/wenda?useUnicode=true&characterEncoding=utf8&useSSL=false
spring.datasource.username=root
spring.datasource.password=root

@SpringBootApplication(exclude={DataSourceAutoConfiguration.class,MybatisAutoConfiguration.class})//这里的MybatisAutoConfiguration.class对应你的数据库框架
public class HelloSpringbootApplication {

  public static void main(String[] args) {
    SpringApplication.run(HelloSpringbootApplication.class, args);
  }
}

@RestController
public class HelloSpringBoot {/**
   * url传参，访问的路径类似这样：localhost:8080/getParamDemo1/1
   * 方法体中的参数要在前面加注释，@PathVariable，代表url中的参数
   */
  @RequestMapping(path = {"/getParamDemo1/{id}"})
  public String getParamDemo1 (@PathVariable("id") int userId){
    System.out.println("get param " + userId);
    return "success get param";
  }
  /**
   * 当然，你也可以通过这种传参方式：localhost:8080/getParamDemo?param1=1或者直接表单提交参数
   * 当然，同时方法中参数声明的注释也要变成@RequestParam，代表请求参数，required属性说明了参数是否是必须的
   */
  @RequestMapping(path = {"/getParamDemo2"})
  public String getParamDemo2 (@RequestParam(value="param1",required = false) int param){
    System.out.println("get param " + param);
    return "success get param";
  }
}

@RestController
public class HelloSpringBoot {

  /**
   * 通过设置RequestMapping的method属性便可以设置该方法可处理的对应请求了，例如下面的getRequestDemo方法只会处理get请求
   */
  @RequestMapping(path = {"/getRequestDemo"},method = RequestMethod.GET)
  public String getRequestDemo (@RequestParam(value="param1",required = false) int param){
    System.out.println("get request test ,get param " + param);
    return "success get param";
  }
  /**
   * 下面的deleteRequestDemo方法只会处理delete请求
   */
  @RequestMapping(path = {"/deleteRequestDemo"},method = RequestMethod.DELETE)
  public String deleteRequestDemo (@RequestParam(value="param1",required = false) int param){
    System.out.println("delete request test ,get param " + param);
    return "success get param";
  }
}

@Component
public class ServiceDemo {
  public String testDemo(){
    String rtnAfterDosomething = "我是返回结果";
    //这里是业务代码
    return rtnAfterDosomething;
  }
}

@RunWith(SpringRunner.class)
@SpringBootTest
public class ServiceDemoTest {
  @Autowired
  ServiceDemo serviceDemo;
  @Test
  public void testDemo() {
    String rtn = serviceDemo.testDemo();
    Assert.assertEquals(rtn, "我是返回结果");
  }

}

spring.datasource.url=jdbc:mysql://localhost:3306/springboot?useUnicode=true&characterEncoding=utf8&useSSL=false
spring.datasource.username=root
spring.datasource.password=root
#下面这条配置声明了mybatis的配置文件路径，classpath对应的是和这个文件统计的resources
mybatis.config-location=classpath:mybatis-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
    PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
    "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>

  <settings>
    <!-- Globally enables or disables any caches configured in any mapper under this configuration -->
    <setting name="cacheEnabled" value="true"/>
    <!-- Sets the number of seconds the driver will wait for a response from the database -->
    <setting name="defaultStatementTimeout" value="3000"/>
    <!-- Enables automatic mapping from classic database column names A_COLUMN to camel case classic Java property names aColumn -->
    <setting name="mapUnderscoreToCamelCase" value="true"/>
    <!-- Allows JDBC support for generated keys. A compatible driver is required.
    This setting   forces generated keys to be used if set to true,
     as some drivers deny compatibility but still work -->
    <setting name="useGeneratedKeys" value="true"/>
  </settings>

  <!-- Continue going here -->

</configuration>

@Mapper
public interface DemoDao {
  @Select({"select demo_param from demo "})
  String queryDemo();
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Controller;
import springboot.hello.helloSpringboot.dao.DemoDao;

@Component
public class ServiceDemo {
  @Autowired
  DemoDao demoDao;
  public String testDemo(){
    String rtnAfterDosomething = "我是返回结果";
    //这里是业务代码
    return rtnAfterDosomething;
  }
  public String queryDemo(){
    return demoDao.queryDemo();
  }
}