JSON文件读取

JSON格式的配置文件(config.json):

 {
     version : "1.1.0",
     db_config : {
         url: "jdbc:mysql://192.168.1.118/xxx?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull",
         username : "root",
         password : "root123"
     },
     redis : {
         host : "192.168.1.1",
         port : "6379",
         timeout : "1000",
         password : "123456789"
     }
     
 }

测试Demo

package common.util;

public class JSONFileReaderTest {

    /**
     * @param args
     */
    public static void main(String[] args) {
        System.out.println("version :  " + JSONFileReader.load("version"));// version : 1.1.0
        System.out.println("db_config.url : " + JSONFileReader.load("db_config.url")); //db_config.url : jdbc:mysql://19...
    }

}

JSONFileReader .java 主要使用了fastjson.jar，具体可参考http://code.alibabatech.com/wiki/display/FastJSON/Home

package common.util;

import java.io.File;
import java.io.IOException;

import org.apache.commons.io.FileUtils;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;

public class JSONFileReader {
    private static JSONObject jsonObject;

    static  {
        String fileName = JSONFileReader.class.getResource("/").getPath() +"config/config.json";
        try {
            String json = FileUtils.readFileToString(new File(fileName));
            jsonObject = JSON.parseObject(json);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    public static final String load(String key) {
        String[] keyArr = key.split("\\.");
        JSONObject targetObject = jsonObject;
        int length = keyArr.length - 1;
        try {
            for (int i = 0; i < length; i++) {
                targetObject = targetObject.getJSONObject(keyArr[i]);
            }
            return targetObject.getString(keyArr[length]);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return "";
    }
}