基于gradle读取 .YML 配置文件（application.yml）中的属性值

1. 新建工程

2. 点Next

3. 新建如下名字

4. 注意填写自己安装的gradle路径

5. 新建之后的工程时这样的

6. 新建application.yml文件

注意:ide默认对yml的支持不好,安装插件intellij-ansible-0.9.5支持即可，插件下载地址：http://pan.baidu.com/s/1nvgECTN 安装方法这里不赘述, 安装方法参考:https://blog.csdn.net/u014042066/article/details/73826072

7. 在文件中输入以下属性

myProps: #自定义属性和值
  simpleProp: simplePropValue
  arrayProps: 1,2,3,4,5
  listProp1:
    - name: abc
      value: abcValue
    - name: efg
      value: efgValue
  listProp2:
    - config2Value1
    - config2Vavlue2
  mapProps:
    key1: value1
    key2: value2

8. 新建java类MyProps.java 

9. 增加以下属性,和各自set get方法,可按Alt+insert快速生成 

package com.mantis;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Component
@ConfigurationProperties( prefix="myProps") //接收application.yml中的myProps下面的属性
public class MyProps {

    private String simpleProp;
    private String arrayProps;
    private List<Map<String,String>> listProp1=new ArrayList<>();
    private List<String>listProp2=new ArrayList<>();
    private Map<String,String>mapProps=new HashMap<>();

    public void setMapProps(Map<String, String> mapProps) {
        this.mapProps = mapProps;
    }

    public String getSimpleProp() {
        return simpleProp;
    }

    public String getArrayProps() {
        return arrayProps;
    }

    public List<Map<String, String>> getListProp1() {
        return listProp1;
    }

    public List<String> getListProp2() {
        return listProp2;
    }



    public void setSimpleProp(String simpleProp) {
        this.simpleProp = simpleProp;
    }

    public void setArrayProps(String arrayProps) {
        this.arrayProps = arrayProps;
    }

    public void setListProp1(List<Map<String, String>> listProp1) {
        this.listProp1 = listProp1;
    }

    public void setListProp2(List<String> listProp2) {
        this.listProp2 = listProp2;
    }



    public Map<String, String> getMapProps() {
        return mapProps;
    }

    @Override
    public String toString() {
        return "MyProps{" +
                "simpleProp='" + simpleProp + '\'' +
                ", arrayProps='" + arrayProps + '\'' +
                ", listProp1=" + listProp1 +
                ", listProp2=" + listProp2 +
                ", mapProps=" + mapProps +
                '}';
    }
}

10 .接下来解决报错问题,在build.gradle中加上以**解

dependencies {
    testCompile group: 'junit', name: 'junit', version: '4.12'
    // spring boot 相关
    compile('org.springframework.boot:spring-boot-starter-web')
    compile('org.springframework.boot:spring-boot-starter-test')
    compile('org.springframework.boot:spring-boot-starter-jdbc')
    compile('org.springframework.boot:spring-boot-starter-aop')
    compile('org.springframework.boot:spring-boot-starter-data-redis')
    compile('org.springframework.boot:spring-boot-configuration-processor')
}

来个小插曲:这里需要说明的是,gradle的注解依赖在*仓库有支持,只要搜索对应的JAR包就可以了,

当然你要是已经有Maven格式的依赖可以直接复制到build.gradle中,他会自动给你转换成gradle的依赖格式.

但是复制的时候一定要把dependency  一起复制进去

<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
<scope>test</scope>
</dependency>

有的没有自动转换,可以自己手动转换,对应的格式如下图

11.接下来创建启动类SpringBootApplication 

package com.mantis;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.autoconfigure.orm.jpa.HibernateJpaAutoConfiguration;

//@SpringBootApplication
@SpringBootApplication(exclude={DataSourceAutoConfiguration.class,HibernateJpaAutoConfiguration.class})
public class ReadYMLApplication {

    public static void main(String[] args) {
        SpringApplication.run(ReadYMLApplication.class, args);
    }
}

注意: 如果只用@SpringBootApplication的注解不加上exclude={DataSourceAutoConfiguration.class,HibernateJpaAutoConfiguration.class}启动项目时会导致如下报错

启动报错（Cannot determine embedded database driver class for database type NONE） 有兴趣各位客官可以试试

12.导入依赖之后,在MyProps.class文件中按Alt+Enter键去掉报错,没有报红之后按Ctrl+Shift+T创建单元测试类,进行一定的删除与修改,如下

package com.mantis;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

@RunWith( SpringJUnit4ClassRunner.class )
@SpringBootTest(classes = ReadYMLApplication.class)
public class MyPropsTest {
   @Autowired
    private MyProps myProps;

   @Test  //trstReadYmlConfig()方法
    public void trstReadYmlConfig(){
       System.out.printf("the myProps is : "+myProps.toString());

   }
}

13.最后项目结构如下,点击下面的按钮既可以开始单元测试了,这个教程写的比较详细,适合刚刚入坑gradle

单元测试结果如下

最后再发个demo地址:https://download.csdn.net/download/master_shifu_/10465336