一、idea 使用spring initializr不选择web搭建springboot项目
1.file => new => project
2.直接next到finish结束。
3.完成后创建controller用例测试
4.pom文件
<?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 https://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>2.1.9.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>cc.ash</groupId>
<artifactId>boot-demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>boot-demo</name>
<description>Demo project for Spring Boot</description> <properties>
<java.version>1.8</java.version>
</properties> <dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency> <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency> <!-- 手动添加web依赖，@restController @requestMapping注解等 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies> <build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build> </project>
5.application.properties
#端口号修改。默认8080
server.port=
6.springboot入口启动类
package cc.ash.bootdemo; import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody; @SpringBootApplication
@Controller
public class BootDemoApplication { @RequestMapping("/boot")
@ResponseBody
public String bootTest() { return "hello springboot";
}
public static void main(String[] args) {
SpringApplication.run(BootDemoApplication.class, args);
} }
7.新建包下controller测试类
package cc.ash.bootdemo.controller; import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController; @RestController
public class TestController { @RequestMapping(name="springboot test", value = "/test")
public String test() {
return "booted";
}
}
8.运行结果
新建包下controller测试类：访问页面
springboot启动类中访问404。改requestMapping、rerun，做了很多操作到怀疑人生。重启idea，世界终于正常了。
能正常访问的结果如下
二、maven搭建springboot项目
1.jdk7的情况下
2.maven搭建
创建完成后的项目结构和pom文件。一个字就是干净
3.手动添加pom依赖
<?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>2.1.7.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent> <groupId>cc.ash</groupId>
<artifactId>boot-demo</artifactId>
<version>1.0-SNAPSHOT</version> <properties>
<java.version>1.8</java.version>
</properties> <!-- =================jdk1.7与springboot版本不兼容======================= -->
<!--<properties>
<java.version>1.7</java.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<start-class>com.myproject.Application</start-class>
</properties>--> <dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency> <dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency> <!-- 手动添加web依赖，@restController @requestMapping注解等 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies> <build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
maven导入依赖（未选择自动导入的情况下）。
4.编写测试用例代码
1).测试controller：
TestController
package cc.ash.controller; import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController; @RestController
public class TestController { @RequestMapping(name="maven手动创建springboot",value={"/manual", "mvnManual"})
@ResponseBody
public String test() { return "maven manual";
} }
2.启动入口：
DemoApplication
package cc.ash; import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication; @SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
3.完成后代码结构
5.访问测试
6.jdk1.7错误留存
不兼容问题
https://blog.csdn.net/wj197927/article/details/79557017
https://www.jianshu.com/p/95d8a0cf0244
idea日志记录（非控制台日志，控制台日志如上）
7.springboot项目结构导致controller访问404的问题
自建的所有需要扫描注解的类，必须与启动类的包平级或者在其之下。如启动类在包【aa.bb】，其他需要扫描的类必须在【aa.bb】中或【aa.bb】之下的包里。
参考链接：
详细说明的：https://www.cnblogs.com/remember-me/p/10091126.html
直接上解决方法的：https://blog.csdn.net/dong__CSDN/article/details/85342180
