近期一个项目需要将解密后的json文件转换为有格式的txt文件，尝试写了一个demo，放代码。
<pre>
import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;

/**

• Created by hexz on 2017/4/25.
  */
  public class Main {
  public static void main(String[] args) throws Exception{
  String path = "C:\Users\hexz\Desktop\testdata\dakehu_decrypt.json";
  FileInputStream fileInputStream = new FileInputStream(path);
  InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream);
  BufferedReader reader =new BufferedReader(inputStreamReader);
  String tempString = null;
  StringBuilder laststr = new StringBuilder();
  while ((tempString = reader.readLine()) != null){
  laststr.append(jsonParse(tempString));
  }
  reader.close();
  System.out.println(laststr);
  }
  public static String jsonParse(String jsonfile) throws Exception{
  StringBuilder jsonSB = new StringBuilder();
  String jsonString = "";

   JSONObject jsonObject = (JSONObject) JSON.parse(jsonfile);
  
   JSONArray jsonArray = jsonObject.getJSONArray("assetInfos");
   for (int i =0; i < jsonArray.size(); i++){
       jsonSB.append(jsonObject.getString("licenseCustomerId"));
       jsonSB.append("\t");
       jsonSB.append(jsonObject.getString("branchName"));
       jsonSB.append("\t");
       jsonSB.append(jsonObject.getString("crmCustomerId"));
       jsonSB.append("\t");
  
       JSONObject assetInfos =jsonArray.getJSONObject(i);
       String assetFullNumber = assetInfos.getString("assetFullNumber");
       if(assetFullNumber == null) {
           assetFullNumber = "null";
       }
       jsonSB.append(assetFullNumber);
       jsonSB.append("\t");
  
       String assetShellNumber = assetInfos.getString("assetShellNumber");
       if(assetInfos.getString("assetShellNumber") == "") {
           assetShellNumber = "null";
       }
       jsonSB.append(assetShellNumber);
       jsonSB.append("\t");
  
       String assetLicenseType = assetInfos.getString("assetLicenseType");
       if(assetInfos.getString("assetLicenseType") == "") {
           assetLicenseType = "null";
       }
       jsonSB.append(assetLicenseType);
       jsonSB.append("\t");
       String assetCreateTime = assetInfos.getString("assetCreateTime");
       if(assetInfos.getString("assetCreateTime") == "") {
  
           assetCreateTime = "null";
       }
       jsonSB.append(assetCreateTime);
       jsonSB.append("\t");
       String assetUpdateTime = assetInfos.getString("assetUpdateTime");
       if(assetInfos.getString("assetUpdateTime") == "") {
  
           assetUpdateTime = "null";
       }
       jsonSB.append(assetUpdateTime);
       jsonSB.append("\t");
       String assetEffectiveStartDate = assetInfos.getString("assetEffectiveStartDate");
       if(assetInfos.getString("assetEffectiveStartDate") == "") {
  
           assetEffectiveStartDate = "null";
       }
       jsonSB.append(assetEffectiveStartDate);
       jsonSB.append("\t");
       String assetEffectiveEndDate = assetInfos.getString("assetEffectiveEndDate");
       if(assetInfos.getString("assetEffectiveEndDate") == "") {
  
           assetEffectiveEndDate = "null";
       }
       jsonSB.append(assetEffectiveEndDate);
       jsonSB.append("\t");
       String assetLimitConcurrent = assetInfos.getString("assetLimitConcurrent");
       if(assetInfos.getString("assetLimitConcurrent") == "") {
  
           assetLimitConcurrent = "null";
       }
       jsonSB.append(assetLimitConcurrent);
       jsonSB.append("\t");
       String assetAssignStatus = assetInfos.getString("assetAssignStatus");
       if(assetInfos.getString("assetAssignStatus") == "") {
  
           assetAssignStatus = "null";
       }
       jsonSB.append(assetAssignStatus);
       jsonSB.append("\t");
       String employeeName = assetInfos.getString("employeeName");
       if(assetInfos.getString("employeeName") == "") {
  
           employeeName = "null";
       }
       jsonSB.append(employeeName);
       jsonSB.append("\t");
       String employeeEmail = assetInfos.getString("employeeEmail");
       if(assetInfos.getString("employeeEmail") == "") {
  
           employeeEmail = "null";
       }
       jsonSB.append(employeeEmail);
       jsonSB.append("\t");
       String employeeCellNumber = assetInfos.getString("employeeCellNumber");
       if(assetInfos.getString("employeeCellNumber") == "") {
  
           employeeCellNumber = "null";
       }
       jsonSB.append(employeeCellNumber);
       jsonSB.append("\t");
       String employeeUpdateTime = assetInfos.getString("employeeUpdateTime");
       if(assetInfos.getString("employeeUpdateTime") == "") {
  
           employeeUpdateTime = "null";
       }
       jsonSB.append(employeeUpdateTime);
       jsonSB.append("\t");
       String locked = assetInfos.getString("locked");
       if(assetInfos.getString("locked") == "") {
  
           locked = "null";
       }
       jsonSB.append(locked);
       jsonSB.append("\t");
       String employeeGlobalId = assetInfos.getString("employeeGlobalId");
       if(assetInfos.getString("employeeGlobalId") == "") {
  
           employeeGlobalId = "null";
       }
       jsonSB.append(employeeGlobalId);
  
       jsonSB.append("\t");
       jsonSB.append("\r\n");
   }
   jsonString = jsonSB.toString();
   return jsonString;
  

  }
  }

</pre>