java - Gson doesn't read pretty printed JSON -


i use gson (version 2.3.1 in java 1.7) serialize object. though work of time, deserializing pretty printed string fails following exception:

com.google.gson.jsonsyntaxexception: com.google.gson.stream.malformedjsonexception: expected name @ line 2 column 1 path $.     @ com.google.gson.gson.fromjson(gson.java:825)     @ de.ais.fileexchange.interfaceimplementations.feprocess.load(feprocess.java:70)

my java-code:

public static ifeprocess load(file file) throws filenotfoundexception, ioexception, classnotfoundexception {     gson gson = new gson();     string json = filehelper.getstringfromfile(file);      jsonreader reader = new jsonreader(new stringreader(json));     reader.setlenient(true);      return gson.fromjson(reader, feprocess.class); }  public static void save(file file, ifeprocess process) throws ioexception {     //gson gson = new gson();     gson gson = new gsonbuilder().setprettyprinting().create();     string json = gson.tojson(process);      filehelper.writestringtofile(json, file); }

the json-string:

{   "description": "",   "altmailadress": "dfgsfsdg",   "mailonerror": true,   "stoponerror": false,   "operationlist": [     {       "lconfig": {         "password": "",         "username": "",         "port": 1212,         "additionallogininformations": "",         "hostname": "",         "istoremotetransfer": false,         "domain": "",         "sambashare": ""       },       "operationconfig": {         "remotedirectory": "",         "localdirectory": "321",         "sourcesemaphoresuffix": "",         "sourcesemaphoretype": "none",         "targetsemaphoresuffix": "",         "targetsemaphoretype": "none",         "sourcefilepattern": "ztju675",         "lock": false,         "delete": false,         "backup": true,         "nooverwrite": false,         "filerenameregex": "ztju675",         "filerenamecontent": ""       },       "fileoperationtype": "filesystem",       "fopconfiguration": {         "foppath": "",         "foptime": "none"       }     },     {       "lconfig": {         "password": "",         "username": "",         "port": 0,         "additionallogininformations": "",         "hostname": "",         "istoremotetransfer": false,         "domain": "",         "sambashare": ""       },       "operationconfig": {         "remotedirectory": "",         "localdirectory": "",         "sourcesemaphoresuffix": "",         "sourcesemaphoretype": "none",         "targetsemaphoresuffix": "",         "targetsemaphoretype": "none",         "sourcefilepattern": "fdsfas",         "lock": false,         "delete": true,         "backup": false,         "nooverwrite": false,         "filerenameregex": "fdsfas",         "filerenamecontent": ""       },       "fileoperationtype": "filesystem",       "fopconfiguration": {         "foppath": "",         "foptime": "none"       }     }   ] }

even though use lenient parsing, not work...

i have tried code , works me following code:

import java.io.file; import java.io.filenotfoundexception; import java.io.ioexception; import java.io.stringreader;  import com.google.gson.gson; import com.google.gson.gsonbuilder; import com.google.gson.stream.jsonreader;  public class main {      public static void main(string[] args) throws exception {         ifeprocess fe=load(new file("jason.json"));         save(new file("txt.json"),fe);     }      public static ifeprocess load(file file) throws filenotfoundexception,             ioexception, classnotfoundexception {         gson gson = new gson();         string json = filehelper.getstringfromfile(file);          jsonreader reader = new jsonreader(new stringreader(json));         reader.setlenient(true);          return gson.fromjson(reader, feprocess.class);     }      public static void save(file file, ifeprocess process) throws ioexception {         gson gson = new gsonbuilder().setprettyprinting().create();         string json = gson.tojson(process);          filehelper.writestringtofile(json, file);     }  }  import java.io.bufferedreader; import java.io.file; import java.io.filenotfoundexception; import java.io.filereader; import java.io.filewriter; import java.io.ioexception;  public class filehelper {      public static string getstringfromfile(file file) {         stringbuilder sb = new stringbuilder();         try {             bufferedreader buff = new bufferedreader(new filereader(file));             string line;             while ((line = buff.readline()) != null)                 sb.append(line + "\n");                 buff.close();             } catch (filenotfoundexception e) {                 e.printstacktrace();             } catch (ioexception e) {                 e.printstacktrace();             }             return sb.tostring();         }          public static void writestringtofile(string json, file file) {             filewriter fw;             try {                 fw = new filewriter(file);                 fw.write(json);                 fw.close();             } catch (ioexception e) {                 e.printstacktrace();             }          }      }       import java.util.arraylist;       public class feprocess implements ifeprocess {          string  description;         string    altmailadress;         boolean   mailonerror;         boolean   stoponerror;         arraylist<operation> operationlist;       }  public class operation {      lconfig lconfig;     operationconfig operationconfig;     string fileoperationtype;      class fopconfiguration {             string foppath;             string foptime;         }      }  public class lconfig {      string password;     string username;     int port;     string additionallogininformations;     string hostname;     boolean istoremotetransfer;     string domain;     string sambashare;  }  public class operationconfig {      string remotedirectory;     string localdirectory;     string sourcesemaphoresuffix;     string sourcesemaphoretype;     string targetsemaphoresuffix;     string targetsemaphoretype;     string sourcefilepattern;     boolean lock;     boolean delete;     boolean backup;     boolean nooverwrite;     string filerenameregex;     string filerenamecontent;   }

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