java 操作Properties文件查询与添加修改 io 读写

实例截图：

实例代码

package com.util;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import java.util.Properties;

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
/**
 * 操作Properties文件 io读写
 * @author yushen
 *
 */
public class TestProperties {
  
  /**
   * 测试Properties
   * @param args
   */
  public static void main(String[] args) {
    //获取系统路径
    String FileUrl = System.getProperty("user.dir")+"/src/config/csd.properties";
    
    //如果已经有了key 会替换之前的key value
    String key = "jdbc";
    String value = "oracle:1521";
    String notes = "00几数据库配置文件！";
    int cbo = putPropertiesKeyValue(FileUrl, key, value, notes);
    System.out.println("数据添加"+(cbo == 0 ? "成功！" : "失败！"));
    
    String QueryValue = getPropertiesValueID(FileUrl,key);
    System.out.println("返回的"+key+"字段查询数据为："+QueryValue);
    
    JSONObject jo = getPropertiesValueAll(FileUrl);
    System.out.println("返回的全部数据是："+jo);
    
  }
  
  /**
   * 给Properties文件添加数据
   * @param Url    文件路径
   * @param key    添加字段key
   * @param value    添加字段value
   * @param Notes    添加字段注释
   * @return       返回0成功，返回1失败
   */
  public static int putPropertiesKeyValue(String Url,String key,String value,String Notes){
    int retBoo = 0;
    Properties prop = new Properties();
    try {
      FileOutputStream oFile = new FileOutputStream(Url, true);
      prop.setProperty(key, value);
      prop.store(oFile, Notes);
      oFile.close();
      retBoo = 0;
    } catch (Exception e) {
      System.out.println(e);
      retBoo = 1;
    }
    return retBoo;
  }
  
  /**
   * 单独查询Properties文件的某个key 返回String
   * @param Url
   * @param key
   * @return String
   */
  public static String getPropertiesValueID(String Url,String key){
    String restValue = "";
    Properties prop = new Properties();
    try {
      InputStream in = new BufferedInputStream(new FileInputStream(Url));
      prop.load(in); 
      restValue = prop.getProperty(key);
    }catch (Exception e) {
      System.out.println(e);
    }
    return restValue;
  }
  
  /**
   * 查询Properties文件所有内容
   * @param Url
   * @return JSONObject
   */
  public static JSONObject getPropertiesValueAll(String Url){
    JSONObject jo = new JSONObject();
    Properties prop = new Properties();
    try {
      InputStream in = new BufferedInputStream(new FileInputStream(Url));
      prop.load(in); 
      Iterator<String> it = prop.stringPropertyNames().iterator();
      while (it.hasNext()) {
        String key = it.next();
        jo.put(key, prop.getProperty(key));
      }
      in.close();
    }catch (Exception e) {
      System.out.println(e);
    }
    return jo;
  }
}