〇、参考资料

1、Spring Boot 中文乱码问题解决方案汇总

https://blog.51cto.com/u_15236724/5372824

2、spring boot读取自定义配置properties文件★

https://www.yisu.com/zixun/366877.html

3、spring boot通过配置工厂类，实现读取指定位置的yml文件★

https://blog.csdn.net/weixin_45168162/article/details/125427465

4、springBoot 读取yml 配置文件的三种方式（包含以及非component下）★

https://blog.csdn.net/weixin_44131922/article/details/126866040

5、SpringBoot集成Swagger的详细步骤

https://blog.csdn.net/m0_67788957/article/details/123670244

一、项目介绍

1、项目框架

2、技术栈

 Spring Boot+Swagger+Lombok+Hutool

3、项目地址

 https://gitee.com/ljhahu/kettle_processor.git

需要权限请联系：liujinhui-ahu@foxmail.com

二、properties配置与使用

1、默认配置文件

（1）配置-application.properties

# Spring Boot端口配置
server.port=9088
# spring数据源配置
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.datasource.password=qaz123
spring.datasource.username=root
spring.datasource.url=jdbc:mysql://192.168.40.111:3306/visualization?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=true
spring.thymeleaf.prefix=classpath:/templates/

（2）读取

Spring Boot自己会读取，配置数据源、thymeleaf等信息

2、自定义配置文件

（1）配置-kettle.properties

# properties  https://blog.csdn.net/weixin_42352733/article/details/121830775
environment=xuelei-www
kettle.repository.type=database
kettle.repository.username=admin
kettle.repository.password=admin

（2）使用-读取单个值-PropertiesController.java

package com.boulderaitech.controller;

import com.boulderaitech.entity.KettleRepositoryBean;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiImplicitParam;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.PropertySource;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@Api("properties测试")
@RestController //Controller和RestController的区别
@PropertySource("classpath:kettle.properties") //默认是application.properties
//可以将PropertySource注解加入entity，也可以加入controller将bean注入
public class PropertiesController {
    @Value("${environment}")
    private String envName;

    @Autowired
    private KettleRepositoryBean kettleRepositoryBean;

    @RequestMapping("/getEnv")
    @ApiOperation("properties方式获取当前的环境")
    public String getEnv() {
        return "hello " + envName;
    }
    @ApiOperation("properties方式获取当前的环境")
    @RequestMapping("/getRepoInfo")
    public String getRepoInfo() {
        return "hello " + kettleRepositoryBean.toString();
    }
}

（3）使用-读取多个值到对象-KettleRepositoryBean.java

package com.boulderaitech.entity;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
@Data
@Component
@NoArgsConstructor
@AllArgsConstructor
@ConfigurationProperties(prefix = "kettle.repository")
public class KettleRepositoryBean {
    private String type;
    private String username;
    private String password;
}

三、yml配置

1、默认配置文件

application.yml

2、自定义配置文件

（1）配置-repository.yml

kettle:
  repository:
    repo1:
      type: postgresql
      ip_addr: 192.168.4.68
      port: 5432
      username: admin
      password: admin
      db_name: kettle
  version: 8.0.0

（2）实现任意位置读取的工厂类-YamlConfigFactory.java

package com.boulderaitech.factory;

import org.springframework.beans.factory.config.YamlPropertiesFactoryBean;
import org.springframework.core.env.PropertiesPropertySource;
import org.springframework.core.env.PropertySource;
import org.springframework.core.io.support.DefaultPropertySourceFactory;
import org.springframework.core.io.support.EncodedResource;

import java.io.IOException;
import java.util.Properties;

/**
 * 在任意位置读取指定的yml文件
 * 参考：https://blog.csdn.net/weixin_45168162/article/details/125427465
 */
public class YamlConfigFactory extends DefaultPropertySourceFactory {
    //继承父类，可以重载父类方法@Override
    //实现接口，重写方法@Override
    @Override
    public PropertySource<?> createPropertySource(String name, EncodedResource resource) throws IOException {
        String sourceName = name != null ? name : resource.getResource().getFilename();
        if (!resource.getResource().exists()) {
            return new PropertiesPropertySource(sourceName, new Properties());
        } else if (sourceName.endsWith(".yml") || sourceName.endsWith(".yaml")) {
            Properties propertiesFromYaml = loadYml(resource);
            return new PropertiesPropertySource(sourceName, propertiesFromYaml);
        } else {
            return super.createPropertySource(name, resource);
        }
    }
    private Properties loadYml(EncodedResource resource) throws IOException {
        YamlPropertiesFactoryBean factory = new YamlPropertiesFactoryBean();
        factory.setResources(resource.getResource());
        factory.afterPropertiesSet();
        return factory.getObject();
    }
}

（3）使用-读取单个值-KettleEnvBean.java

package com.boulderaitech.entity;

import com.boulderaitech.factory.YamlConfigFactory;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;

@Data
@Component
@AllArgsConstructor
@NoArgsConstructor
@PropertySource(value = "classpath:repository.yml",factory = YamlConfigFactory.class)//需要通过工厂加载指定的配置文件
public class KettleEnvBean {
    @Value("${kettle.version}")
    private String kettleVersion;
}

（4）使用-读取多个值到对象-KettleRepositoryYmlBean.java

package com.boulderaitech.entity;

import com.boulderaitech.factory.YamlConfigFactory;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Component;

@Data
@AllArgsConstructor
@NoArgsConstructor
@PropertySource(value = "classpath:repository.yml",factory = YamlConfigFactory.class)//需要通过工厂加载指定的配置文件
@ConfigurationProperties(prefix = "kettle.repository.repo1") //需要添加spring boot的注解，才可以使用
//思考：能否通过反射操作修改注解的参数
@Component()
public class KettleRepositoryYmlBean {
    private String type;
    private String ip_addr; //命名只能用下划线
    private String username;
    private String password;
    private String port;
    private String db_name;
}

（5）使用-YmlController.java

package com.boulderaitech.controller;

import com.boulderaitech.entity.KettleEnvBean;
import com.boulderaitech.entity.KettleRepositoryYmlBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.PropertySource;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

@RestController //使用controller返回的结果会按照template进行解析
//使用RestController则会返回对应的字符串
public class YmlController {
    @Autowired
    private KettleRepositoryYmlBean kettleRepositoryYmlBean;

    @Autowired
    private KettleEnvBean kettleEnvBean;

    @RequestMapping(value = "/getKettleVersion") //默认是get
    public String getKettleVersion() {
        return "hello " + kettleEnvBean.getKettleVersion();
    }

    // @GetMapping("/getRepoInfoYml")，不支持get方法
    //@RequestMapping(value = "/getRepoInfoYml", method = RequestMethod.POST)
    @RequestMapping(value = "/getRepoInfoYml")
    public String getRepoInfoYml() {
        return "hello " + kettleRepositoryYmlBean.toString();
    }
}