java Json解析和文件备份

逃离我推掉我的手 2022-09-30 06:08 196阅读 0赞

**java Json解析和文件备份**

1、JSON解析，这里解析采用的是org.json.JSONObject，首先看一下json文件，这里取名叫zunyijson.txt,我把其存放在E:\\\\xml\\\\test.txt下面，解析json要区分好key是JSONObject和JSONArray即可，如下：

{
        "additionalInfo": [
            {
                "name": "MAINTENANCE_PERSON_NAME",
                "value": ""
            },
            {
                "name": "REMARK",
                "value": ""
            },
            {
                "name": "IPADDRESS",
                "value": "172.31.7.8"
            },
            {
                "name": "MAINTENANCE_PERSON_ADDRESS",
                "value": ""
            },
            {
                "name": "CONTACT_ADDRESS",
                "value": "彩虹大厦南楼二层"
            },
            {
                "name": "HARDWARE_VER",
                "value": "A.2"
            },
            {
                "name": "NETYPE_DISPLAY_NAME",
                "value": "OPCOM3500E"
            },
            {
                "name": "ISTATUS",
                "value": "1"
            },
            {
                "name": "NE_CATEGORY_ID",
                "value": "0"
            },
            {
                "name": "CREATE_TIME",
                "value": "2008-12-29 11:52:59"
            },
            {
                "name": "CREATE_USER",
                "value": ""
            },
            {
                "name": "MACADDRESS",
                "value": ""
            },
            {
                "name": "READCOM",
                "value": "zydx"
            },
            {
                "name": "WRITECOM",
                "value": "zydxvip"
            },
            {
                "name": "GRID_NAME",
                "value": ""
            },
            {
                "name": "GRID_ID",
                "value": ""
            },
            {
                "name": "PROPERTY_RIGHT_UNIT",
                "value": ""
            },
            {
                "name": "CUS_NAME",
                "value": ""
            },
            {
                "name": "STATION",
                "value": ""
            },
            {
                "name": "ROOM",
                "value": ""
            },
            {
                "name": "NET_ID",
                "value": ""
            },
            {
                "name": "IS_LOCAL",
                "value": "1"
            },
            {
                "name": "TOPO_AEND_PTP",
                "value": ""
            }
        ],
        "communicationState": {},
        "emsInSyncState": true,
        "location": " ",
        "name": [
            {
                "name": "EMS",
                "value": "Raisecom/NNM"
            },
            {
                "name": "ManagedElement",
                "value": "2"
            }
        ],
        "nativeEMSName": "22-3500E-1",
        "owner": "Raisecom",
        "productName": "OPCOM3500E",
        "supportedRates": [],
        "userLabel": "22-3500E-1",
        "version": "2.5.36"
    }

2、解析代码如下，文件放在本地，通过代码读取出来然后解析：

package www.zy.com.FirstJava;
    
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.IOException;
    
    
    import org.json.JSONArray;
    import org.json.JSONException;
    import org.json.JSONObject;
    
    /**
     * 解析json
     * @author Administrator
     *
     */
    public class ZunYiJson {
    
    	public static void main(String[] args) {
    		File file = new File("E:\\xml\\zunyijson.txt");
    		if(!file.exists()){
    			System.out.println("文件不存在！");
    		}
    		try {
    			 analysis(file);
    		} catch (IOException e) {
    			e.printStackTrace();
    		}
    	}
    	
    	public static void analysis(File file) throws IOException{
    		FileInputStream fis = new FileInputStream(file);
    		int size = fis.available();//求出长度一次性读完
    		byte[] by = new byte[size];
    		fis.read(by);
    		fis.close();
    		String str = new String(by,"GB2312");//json字符串的结果 
    		System.out.println(str);
    		try {
    			JSONObject jsonObject = new JSONObject(str);
    			JSONArray jsonArray = jsonObject.getJSONArray("additionalInfo");
    			for(int i = 0;i<jsonArray.length();i++){
    				JSONObject jo = jsonArray.getJSONObject(i);
    				System.out.println("name:"+ jo.get("name"));
    				System.out.println("value:"+ jo.get("value"));
    			}
    			System.out.println("communicationState:" + jsonObject.get("communicationState"));
    			System.out.println("emsInSyncState:" + jsonObject.getBoolean("emsInSyncState"));
    			System.out.println("location:" + jsonObject.get("location"));
    			JSONArray ja = jsonObject.getJSONArray("name");
    			for(int j = 0;j<ja.length();j++){
    				JSONObject js = ja.getJSONObject(j);
    				System.out.println("name:" + js.get("name"));
    				System.out.println("value:" + js.get("value"));
    			}
    			System.out.println("nativeEMSName:" + jsonObject.get("nativeEMSName"));
    			System.out.println("owner:" + jsonObject.get("owner"));
    			System.out.println("productName:" + jsonObject.get("productName"));
    			System.out.println("supportedRates:" + jsonObject.get("supportedRates"));
    			System.out.println("version:" + jsonObject.get("version"));
    		} catch (JSONException e) {
    			e.printStackTrace();
    		}
    		
    	}
    }

3、java实现文件备份代码，从一个路径备份到某一个路径下

/**
    	 * 备份文件到指定目录下
    	 * @throws FileNotFoundException
    	 * @throws IOException
    	 */
    	 public static void copyFile() throws FileNotFoundException, IOException {
    		 	//读操作，原始目录
    		 	FileInputStream	fis = new FileInputStream(PATH);//PATH是原路径
    		 	if(fis!=null){
    		 		 //写操作，目标目录
    		        String dataTime = getStringDateShort();
    		        String filePath = "F:\\ftp\\file_bak\\report" + dataTime + ".txt";//新路径
    		        bakFileName = filePath;
    		        FileOutputStream fos = new FileOutputStream(filePath);
    		        int len = 0;
    		        byte[] buf = new byte[1024];
    		       
    		        while ((len = fis.read(buf)) != -1) {
    		            fos.write(buf, 0, len);
    		        }
    		        System.out.println("附件备份到F:\\ftp\\file_bak\\成功！");
    		        fos.close();
    		        fis.close();
    		 	}
    	    }
    	
    	/**
    	 * 获取现在时间并将其格式化为指定格式 
    	 * @return
    	 */
    	 public static String getStringDateShort() {
    		   Date currentTime = new Date();
    		   SimpleDateFormat formatter = new SimpleDateFormat("yyyyMMddHHmmss");
    		   String dateString = formatter.format(currentTime);
    		   return dateString;
    		}

4、json解析结果如图所示：

![20170406215548899][]

[20170406215548899]: /images/20220708/130daa5ba8954cbda313c10c05aabcbc.png