java Json解析和文件备份

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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 FileInputStreamfis = 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：

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