第一步：读取资源文件位置的三种方式:

1、字符串形式： 
String path = ResourceUtils.getURL("classpath:data.json").getPath(); 
 
2、流形式 
InputStream inputStream  = getClass().getClassLoader().getResourceAsStream("data.json"); 
 
3、资源方式 
Resource resource = new ClassPathResource("data.json");

在springBoot resource 资源文件下存在data.json 资源文件。

应用场景: SringBoot 读取本地资源文件,完成数据相关初始化

package com.zzg.controller; 
 
import java.io.File; 
import java.util.List; 
import java.util.regex.Pattern; 
import java.util.stream.Collectors; 
 
import org.apache.commons.io.FileUtils; 
import org.apache.commons.lang3.StringUtils; 
import org.springframework.stereotype.Controller; 
import org.springframework.util.ResourceUtils; 
import org.springframework.web.bind.annotation.CrossOrigin; 
import org.springframework.web.bind.annotation.RequestMapping; 
import org.springframework.web.bind.annotation.RequestMethod; 
import org.springframework.web.bind.annotation.ResponseBody; 
 
import com.alibaba.fastjson.JSONArray; 
import com.alibaba.fastjson.JSONObject; 
 
import io.swagger.annotations.Api; 
import io.swagger.annotations.ApiOperation; 
 
@Controller 
@RequestMapping("/api/location") 
@CrossOrigin 
@Api(value = "模拟测试Controlle", tags = "模拟测试操作服务") 
public class TestLocation { 
	static JSONArray array = null; 
	static { 
		try { 
			String path = ResourceUtils.getURL("classpath:data.json").getPath(); 
			File file = new File(path); 
			if(file.exists()) { 
				String content = FileUtils.readFileToString(file,"UTF-8"); 
				if(StringUtils.isNotEmpty(content)) { 
					array = JSONArray.parseArray(content); 
				} 
			} 
		} catch (Exception e) { 
			// TODO Auto-generated catch block 
			System.out.println(e.getMessage()); 
		} 
	} 
	 
	@RequestMapping(value="/find", method={RequestMethod.GET}, produces = "application/json;charset=UTF-8") 
	@ResponseBody 
	@ApiOperation(httpMethod = "GET", value = "模拟测试对象查询") 
	public String find() { 
		List<JSONObject> list = null; 
		if(array != null) { 
			list = array.stream().filter(item ->{ 
				JSONObject object = (JSONObject)item; 
				String code = object.getString("code"); 
				return Pattern.matches("^[\\s\\S]*0000$", code); 
			}).map(item ->{ 
				return (JSONObject)item; 
			}).collect(Collectors.toList()); 
		} 
		 
		JSONObject obj = new JSONObject(); 
		obj.put("code", 0); 
		obj.put("data", list); 
		return obj.toJSONString(); 
	} 
 
}