yml檔案 資料回顯

系統要求

Java 8+

springBoot2.5 +

建立springBoot專案工程

配置pom.xml檔案

<?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>2.5.5</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.xiang</groupId>
    <artifactId>springInitailizr</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>springInitailizr</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-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <!--
            自定義的類和配置檔案繫結一般沒有提示，可以新增一個依賴，然後重啟專案可以解決
            -->
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

 

編寫User類

package com.xiang.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Set;

/**
 * Created by IntelliJ IDEA.
 * User: xiang
 * Date: 2021/10/13 10:02
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
@Component
@ConfigurationProperties("user")//繫結配置檔案，設定繫結的字首

public class User {
    private  String userName;
    private  Boolean boss;
    private  Date birth;
    private  Integer age;
    private  Pet pet;
    private  String[] interfaces;
    private  List<String> friends;
    private  Map<String, String> score;
    private  Map<String, List<Pet>> allPets;
    private  Set<Double> money;



}

 

編寫Pet類

package com.xiang.pojo;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.stereotype.Component;

/**
 * Created by IntelliJ IDEA.
 * User: xiang
 * Date: 2021/10/13 10:03
 */
@Data
@AllArgsConstructor
@NoArgsConstructor
@Component
public class Pet {
    private  String name;
    private  Double weight;
}

 

編寫application.yml檔案

user:
  userName: "xiang"
#  userName: 'xiang'
  boss: true
  birth: 2000/11/11
  age: 40
  pet:
    name: "小哈"
    weight: 10
  interfaces: [ 學習,上網,游泳,遊戲 ]
  friends:
    - 小一
    - 小二
    - 小五
  score: {
    JavaSE: 100,
    JavaEE: 100,
    JavaScript: 100,
    Linux: 100
  }
  allPets:
    dog:
      - {
        name: 二哈, weight: 30
      }
      - {
        name: 小二哈, weight: 20
      }
    cat: [
      {
        name: 哈哈, weight: 10
      }
    ]

  money:
    - 10000.00
    - 99999.00

編寫HomeController類

package com.xiang.controller;

import com.xiang.pojo.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

/**
 * Created by IntelliJ IDEA.
 * User: xiang
 * Date: 2021/10/13 10:31
 */
@Controller

public class HomeController {
    @Autowired
    private User user;

    @ResponseBody
    @RequestMapping("/info")
    public User info() {
        return user;
    }


    @ResponseBody
    @RequestMapping("/a.html")
    public String info2() {
        return "user/a.html..............";
    }
}

主程式測試

package com.xiang;

import com.xiang.pojo.User;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.ConfigurableApplicationContext;

@SpringBootApplication
public class SpringInitailizrApplication {

    public static void main(String[] args) {
        ConfigurableApplicationContext context = SpringApplication.run(SpringInitailizrApplication.class, args);

        User user = context.getBean("user", User.class);
        System.out.println(user);
    }

}

執行結果

控制檯

User(userName=xiang, boss=true, birth=Sat Nov 11 00:00:00 CST 2000, age=40, pet=Pet(name=小哈, weight=10.0), interfaces=[學習, 上網, 游泳, 遊戲], friends=[小一, 小二, 小五], score={JavaSE=100, JavaEE=100, JavaScript=100, Linux=100}, allPets={dog=[Pet(name=二哈, weight=30.0), Pet(name=小二哈, weight=20.0)], cat=[Pet(name=哈哈, weight=10.0)]}, money=[10000.0, 99999.0])

前端

專案結構目錄

yaml

簡介

YAML是一種標記語言

非常適合用來做以資料為中心的配置檔案

基本語法

key: value ；kv之間有空格

大小寫敏感

使用縮排表示層級關係

縮排不允許使用tab，只允許使用空格

縮排的空格數不重要，只要相同層級的元素左對齊即可

'#'表示註釋

字串無需加引號

‘ 表示的 / 會被轉義

資料型別

• 字面量：單個的、不可再分的值：date、boolean、string、number、null

k: v

• 物件：鍵值對的集合：map、set、object

行內寫法(與json的表示相同)：  k: {k1:v1,k2:v2,k3:v3} 

k: 
  k1: v1
  k2: v2
  k3: v3

• 陣列：一組按次序排列的值：array、list

行內寫法(與json的表示相同)：  k: [v1,v2,v3]

k:
 - v1
 - v2
 - v3