SpringBoot零基础入门指南3--读取yml配置文件

删除application.properties并在原地添加

application.yml

application-dev.yml

application-prod.yml

 

在application.yml中添加spring.profiles.active  选中会数据会自动布局，或者手动布局

并赋值 dev ，此配置为选中启动时的配置文件为application-dev.yml

 

 

spring:
  profiles:
    active: dev

 

 

添加一些配置到application-dev.yml里面，需要格式正确

server:
  context-path: /
  port: 8080
  session:
    timeout: 30
  tomcat:
    uri-encoding: utf-8
    max-threads: 2000

 

 

#### thymeleaf cache设置为false 界面不重启容器也能更新 #####
spring:
  main:
    banner-mode: "off"    ## 启动banner图取消
  thymeleaf:
    cache: false
    mode: HTML5
  ##spring-boot-devtools 打包时是否移除
  devtools:
    remote:
      secret: false

 

 

然后添加一些需要读取的数据：

#获取数据的测试数据源
ymlData:
  stringData: simpleData
  arrayData: 1,2,3,4,5,6
  listData1:
    - name: abc
      value: abcsvalue
    - name: efg
      value: efgsvalue
  listData2:
    - list1111
    - list2222
  mapData:
     key1: aa
     key2: bb
     key3: cc

 

 

添加以下文件并添加代码：

 

 

 

YmlController.java

package com.xingquan.controller;

import com.xingquan.service.YmlService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/")
public class YmlController {

    @Autowired
    private YmlService ymlService;

    @RequestMapping("show")
    public String showData() {
       ymlService.showData();
        return "完成了";
    }
}

 

 

 

YmlData.java

 

package com.xingquan.entity;

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

import java.util.List;
import java.util.Map;

/**

 * 注意属性名称和yml配置文件的名称一致
 */
@Component
@ConfigurationProperties(prefix = "ymlData")
public class YmlData {
    private String stringData;
    private int[] arrayData;
    private List<Map<String, String>> listData1;
    private List<String> listData2;
    private Map<String, String> mapData;

    public String getStringData() {
        return stringData;
    }

    public void setStringData(String stringData) {
        this.stringData = stringData;
    }

    public int[] getArrayData() {
        return arrayData;
    }

    public void setArrayData(int[] arrayData) {
        this.arrayData = arrayData;
    }

    public List<Map<String, String>> getListData1() {
        return listData1;
    }

    public void setListData1(List<Map<String, String>> listData1) {
        this.listData1 = listData1;
    }

    public List<String> getListData2() {
        return listData2;
    }

    public void setListData2(List<String> listData2) {
        this.listData2 = listData2;
    }

    public Map<String, String> getMapData() {
        return mapData;
    }

    public void setMapData(Map<String, String> mapData) {
        this.mapData = mapData;
    }
}

 

 

YmlService.java

 

package com.xingquan.service;

public interface YmlService {
    void showData();
}

 

 

YmlServiceImpl.java

 

package com.xingquan.service.serviceImpl;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.xingquan.entity.YmlData;
import com.xingquan.service.YmlService;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class YmlServiceImpl implements YmlService{
    @Autowired
    private YmlData ymlData;

    private Log _log = LogFactory.getLog(YmlService.class);

    @Override
    public void showData() {
        ObjectMapper objectMapper = new ObjectMapper();

        try {
            _log.info(ymlData.getStringData());
            _log.info(objectMapper.writeValueAsString(ymlData.getArrayData()));
            _log.info(objectMapper.writeValueAsString(ymlData.getListData1()));
            _log.info(objectMapper.writeValueAsString(ymlData.getListData2()));
            _log.info(objectMapper.writeValueAsString(ymlData.getMapData()));

        } catch (JsonProcessingException e) {
            e.printStackTrace();
        }


    }
}

 

 

 

启动tomcat并在浏览器输入http://localhost:8080/show

 

 

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