web项目demo

环境配置： tomcat+jdk1.8+maven+springboot+intellij idea

创建项目需要的准备工作：
1.下载maven的jar包

项目的git地址：https://github.com/wanglinlin0310/webdemo

1.打开idea创建一个maven项目

构建成功后的目录结构如下

2.根据需要创建以下目录

3.pom.xml文件配置

工程中用到的第三方jar包需要在pom.xml中配置，maven会自动下载

<?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">

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.6.RELEASE</version>
        <relativePath/>
    </parent>

    <modelVersion>4.0.0</modelVersion>
    <groupId>com.web.demo</groupId>
    <artifactId>demo</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <java.version>1.8</java.version>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
            </resource>
        </resources>

    </build>

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

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

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

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.58</version>
        </dependency>
    </dependencies>
</project>

4.创建DemoApplication

@EnableScheduling
@SpringBootApplication
@ImportResource(value = {"classpath:spring-beans.xml"})
@ServletComponentScan
public class DemoApplication {
    public static void main(String[] args) {
        SpringApplication.run(DemoApplication.class, args);
    }
}

5.创建Controller

@Controller
@RequestMapping("/demo")
public class DemoController {
    @RequestMapping("test")
    @ResponseBody
    public JSONObject testDemo(){
        JSONObject retJo = new JSONObject();
        retJo.put("data","hello world");
        return retJo;
    }
}

6.设置启动

控制台输出如下：

7.在浏览器中通过url访问

其中/demo/test 是前面 DemoController 中配置的路径：

返回值：{“data”:“hello world”}
是程序里需要返回的数据。