java 讀取json檔案配置

找一個工具讀取json檔案，網上好多，找了一個測試了下，記錄下來

1.  要放入讀取io的依賴包

<dependency>
			<groupId>commons-io</groupId>
			<artifactId>commons-io</artifactId>
			<version>2.4</version>
		</dependency>
           

2. 建立一個json格式的檔案放入resources下

檔案内容：

 3. 建立工具類 JsonResourceUtils

package com.***.***.util;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.apache.commons.io.FileUtils;
import org.apache.log4j.Logger;

import java.io.File;
import java.net.URL;

public class JsonResourceUtils {

    private static Logger logger = Logger.getLogger(JsonResourceUtils.class);

    private JsonResourceUtils() {

    }

    //filename 為檔案名字 如 “/json/app_version_info.json”
    public static JSONObject getJsonObjFromResource(String filename) {
        JSONObject json = null;

        if (!filename.contains(".json")) {
            filename += ".json";
        }

        try {

            URL url = JsonResourceUtils.class.getResource(filename);
            String path = url.getPath();
            File file = new File(path);
            if (file.exists()) {
                String content = FileUtils.readFileToString(file, "UTF-8");
                json = JSON.parseObject(content);
            } else {
                logger.info("file not exist!");
            }

        } catch (Exception e) {
            e.printStackTrace();
            logger.info("readFileToString" + e.getMessage());
        }


        return json;
    }
}

           

4.控制層讀取

@RequestMapping(value = {"/getJsonFile"}, method = {RequestMethod.POST})
    //@ResponseBody （控制層已使用@RestController）
	public Object getJsonFile(HttpServletRequest request, HttpServletResponse response){
		
		return JsonResourceUtils.getJsonObjFromResource("/aaa.json");
	}
           

5. 運作結果