springboot读取application.yaml文件数据
前言
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一、创建并编辑对应的文件
1.application.yaml
！！！这里一定要注意，datasource一定不能写成dataSource，因为会和Spring内部的产生冲突
server:
port: 8080
contry: china
user:
- name: zhangsan
age: 18
- name: lisi
age: 20
likes:
- ball
- code
- game
baseDir: c:/win10
#使用${属性名}引用数据
tempDir: ${baseDir}/temp
#创建类：用于封装下面的数据
#由spring帮我们去加载数据对象中，一定告诉spring加载这组信息
#使用时候从spring中直接获取信息使用
datasource:
driver: com.mysql.jdbc.Driver
url: jdbc:mysql://localhost/springboot_db
username: root
password: root
2.MyDataSource
package com.codejams;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
//1.定义数据模型封装yaml文件中对应的数据
//2.定义为spring管控的bean
@Component
//3.指定加载的数据
@ConfigurationProperties(prefix="datasource")
public class MyDataSource {
private String driver;
private String url;
private String username;
private String password;
@Override
public String toString() {
return "MyDataSource{" +
"driver='" + driver + '\'' +
", url='" + url + '\'' +
", username='" + username + '\'' +
", password='" + password + '\'' +
'}';
}
public String getDriver() {
return driver;
}
public void setDriver(String driver) {
this.driver = driver;
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
this.url = url;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
}
二、使用步骤
1.测试代码
代码如下（示例）：
package com.codejams.controller;
import com.codejams.MyDataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.env.Environment;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("books")
public class BookController {
//读取yaml文件
@Value("${contry}")
private String contry;
@Value("${user[1].name}")
private String name;
@Value("${likes[1]}")
private String like;
@Value("${tempDir}")
private String tempDir;
//使用Environment对象封装所有数据
@Autowired
private Environment env;
//查看datasource是否注入成功
@Autowired
private MyDataSource myDataSource;
@GetMapping
public String test(){
System.out.println("running...");
System.out.println(contry);
System.out.println(name);
System.out.println(like);
System.out.println(tempDir);
System.out.println("----------------------------");
System.out.println(env.getProperty("contry"));
System.out.println(env.getProperty("user[1].name"));
System.out.println("----------------------------");
System.out.println(myDataSource);
return "running..";
}
}
2.效果展示
如下（示例）：
