# springboot_hello

**Repository Path**: CYSpringBoot/springboot_hello

## Basic Information

- **Project Name**: springboot_hello
- **Description**: 创建springboot的Web基础服务
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2019-06-26
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README


# springboot_hello

## <span id='helloWeb'>基于SpringBoot的Web项目构建</span>

1.[new] -> [product] -> 选择[Spring Initializr] -> [next]
> ![init](https://images.gitee.com/uploads/images/2019/0626/101832_54b48ff3_4776933.png)

2. 配置工程 [Group]、[Artifact]、[Type]
> ![project](https://images.gitee.com/uploads/images/2019/0626/102154_eae47a62_4776933.png)

3. 选择项目依赖包 这里只选择Web基础包
> 选择[Web] -> [Spring Web Starter]
> ![config](https://images.gitee.com/uploads/images/2019/0626/102359_89bffbc4_4776933.png)

4. 完成项目
> ![finish](https://images.gitee.com/uploads/images/2019/0626/102456_f120f128_4776933.png)

5. 启动Web项目
> 导入Maven项目依赖，导入完成后，点击 [Run] -> 选择 [Run 'XXXX']
> ![start](https://images.gitee.com/uploads/images/2019/0626/103636_db8d876f_4776933.png)

6. 自定义Web服务端口
> Web服务启动默认端口是8080，如果本地8080端口被占用，可以自行修改启动服务端口
>
> 选择文件夹 [Resources] -> [application.properties] 
``` Java
server.port = 8888
```

## <span id='createController'>创建RestController</span>
1. 创建RestController进行测试
> 创建包 [Controller] -> [HelloController.java], HelloController.java 代码如下:
```java
package com.lc4y.hello.Controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    @RequestMapping(value = "/hello")
    public String hello() {
        return "hello, springboot";
    }
}

```
2. 测试hello接口
> 重新启动服务，在浏览器中输入 http://localhost:8888/hello
> ![result](https://images.gitee.com/uploads/images/2019/0626/110634_05639a7e_4776933.png)

3. 返回JSON格式数据
> 创建包 [Entity] -> [User.java], User.java 代码如下:

```java
package com.lc4y.hello.Entity;

// 实体类
public class User {

    // 用户名
    private String userName;

    // 年龄
    private Integer userAge;

    public User(String userName, Integer userAge) {
        this.userName = userName;
        this.userAge = userAge;
    }

    public String getUserName() {
        return userName;
    }

    public void setUserName(String userName) {
        this.userName = userName;
    }

    public Integer getUserAge() {
        return userAge;
    }

    public void setUserAge(Integer userAge) {
        this.userAge = userAge;
    }
}

```

HelloController.java 代码如下:

```java
package com.lc4y.hello.Controller;

import com.lc4y.hello.Entity.User;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class HelloController {

    @RequestMapping(value = "/hello")
    public String hello() {
        return "hello, springboot";
    }

    @RequestMapping(value = "/getUser")
    public User getUser() {
        User user = new User("lc4y",18);

        return user;
    }
}

```

> 重新启动服务，在浏览器中输入 http://localhost:8888/getUser
> ![JSONData](https://images.gitee.com/uploads/images/2019/0626/110547_0a91e6d2_4776933.png)

# 完成
> 待续...