Parse json format data and parse json format

Parse json format data and parse json format

Goals

Read the json format data in the file, and one row is a json format data. It is parsed and encapsulated into Entity classes.

Parse json data using google's Gson object

The json format data I parse now is:

{"id": "1403","name": "1.2.3 Diva","has_barcode": true,"barcode_format": "EAN_13","homepage": "http://1-2-3.fr","regions": ["DE","FR"],"other_stores": [],"typos": ["un deux trois","un1deux2trois3"],"logo": "undeuxtrois","android_banner_url": "http://stocardapp.s3-external-3.amazonaws.com/android/banner/undeuxtrois.png","ios_banner_url": "http://stocardapp.s3-external-3.amazonaws.com/ios/banners/undeuxtrois.png","ios_logo_url": "http://stocardapp.s3-external-3.amazonaws.com/ios/icons/undeuxtrois@2x.png"},

Code Implementation

1. entity class

import java.util.List;public class ImportBrand{    private int id;    private String name;    private String has_barcode;    private String barcode_format;    private String homepage;    private List<String> regions;    private List<String> other_stores;    private List<String> typos;    private String logo;    private String android_banner_url;    private String ios_banner_url;    private String ios_logo_url;        @Override    public String toString()    {        // TODO Auto-generated method stub        return "id=" + id + ",name = " + name + ",has_barcode = " + has_barcode + ",barcode_format=" + barcode_format +                ",homepage =" + homepage + ",regions = " + regions +",logo = " + logo +",android_banner_url = " + android_banner_url +                ",ios_banner_url=" + ios_banner_url + ",ios_logo_url = " + ios_logo_url;    }            public int getId()    {        return id;    }    public void setId(int id)    {        this.id = id;    }    public String getName()    {        return name;    }    public void setName(String name)    {        this.name = name;    }    public String getHas_barcode()    {        return has_barcode;    }    public void setHas_barcode(String has_barcode)    {        this.has_barcode = has_barcode;    }    public String getBarcode_format()    {        return barcode_format;    }    public void setBarcode_format(String barcode_format)    {        this.barcode_format = barcode_format;    }    public String getHomepage()    {        return homepage;    }    public void setHomepage(String homepage)    {        this.homepage = homepage;    }            public List<String> getRegions()    {        return regions;    }    public void setRegions(List<String> regions)    {        this.regions = regions;    }    public List<String> getOther_stores()    {        return other_stores;    }    public void setOther_stores(List<String> other_stores)    {        this.other_stores = other_stores;    }    public List<String> getTypos()    {        return typos;    }    public void setTypos(List<String> typos)    {        this.typos = typos;    }    public String getLogo()    {        return logo;    }    public void setLogo(String logo)    {        this.logo = logo;    }    public String getAndroid_banner_url()    {        return android_banner_url;    }    public void setAndroid_banner_url(String android_banner_url)    {        this.android_banner_url = android_banner_url;    }    public String getIos_banner_url()    {        return ios_banner_url;    }    public void setIos_banner_url(String ios_banner_url)    {        this.ios_banner_url = ios_banner_url;    }    public String getIos_logo_url()    {        return ios_logo_url;    }    public void setIos_logo_url(String ios_logo_url)    {        this.ios_logo_url = ios_logo_url;    }}

2. Read files

Import java. io. bufferedReader; import java. io. file; import java. io. fileInputStream; import java. io. inputStreamReader; import java. util. arrayList; import java. util. list;/*** read the file ** @ author zcr **/public class ImportFile {/*** function: Java reads the txt file content step: 1: get file handle 2 First: Get file handle as input byte code stream, you need to read this input stream * 3: after reading the input stream, you need to read the generated byte stream 4: output of one row. Readline (). Note: you need to consider the exception ** @ param filePath * file path [reaching the file: for example, D: \ aa.txt] * @ return splits the file into arrays and stores them in the list. */Public static List <String> readtxtfile1_stringarrlist (String filePath) {List <String> list = new ArrayList <String> (); try {String encoding = "UTF-8 "; file file = new File (filePath); if (file. isFile () & file. exists () {// determine whether the file exists InputStreamReader read = new InputStreamReader (new FileInputStream (file), encoding); // take into account the encoding format BufferedReader bufferedReader = new BufferedReader (read ); string l IneTxt = null; while (lineTxt = bufferedReader. readLine ())! = Null) {if (isRightFormat (lineTxt) {list. add (lineTxt. substring (lineTxt. indexOf ("{"), lineTxt. lastIndexOf (',');} read. close ();} else {System. out. println ("the specified file cannot be found");} catch (Exception e) {System. out. println ("An error occurred while reading the file content"); e. printStackTrace ();} return list;} public static void main (String argv []) {String filePath = "C: \ Users \ owner \ Desktop \ zhuoxin technology internship \ stores. json "; List <String> dataList = readtxtfile1_stringarrlist (filePath); for (int I = 0; I <dataList. size (); I ++) {System. out. println (dataList. get (I);} System. out. println (dataList. size ());} /*** determine whether the data is in a valid format * @ param jsonStr with the judged data * @ return returns whether the row is in the correct format */public static boolean isRightFormat (String jsonStr) {return jsonStr. matches ("[\ p {Space}] * [{] {1 }. * [}] {1} [,] {1 }");}}

3. method call and Test

/*** Format json data ** @ author zcr **/public class FormatJson {public static void main (String [] args) {String filePath = "C: \ Users \ owner \ Desktop \ zhuoxin technology internship \ stores. json "; List <ImportBrand> brandList = FormatJson. formatFileListToBrand (filePath); for (int I = 0; I <brandList. size (); I ++) {System. out. println (brandList. get (I);} System. out. println (brandList. size ());} /*** convert json format data to Import object * @ param jsonStr json object with conversion * @ return json format data corresponding object */public static ImportBrand formatFromJsonToObject (String jsonStr) {Gson gson = new Gson (); ImportBrand brand = gson. fromJson (jsonStr, ImportBrand. class); return brand ;} /*** convert the String-type json format to a collection of ImportBrand types * @ param jsonStrList List objects in the json format to be converted * @ return: a collection of ImportBrand objects converted from json format objects * /public static List <ImportBrand> formatStringListToBrand (List <String> jsonStrList) {List <ImportBrand> listImportBrand = new ArrayList <ImportBrand> (); int size = jsonStrList. size (); for (int I = 0; I <size; I ++) {listImportBrand. add (formatFromJsonToObject (jsonStrList. get (I);} return listImportBrand;}/*** read the file, convert data in json format to the file path read by ImportBrand * @ param filePath of the List object * @ return */public static List <ImportBrand> formatFileListToBrand (String filePath) {List <String> dataList = ImportFile. readtxtfileinclustringarrlist (filePath); List <ImportBrand> brandList = formatStringListToBrand (dataList); return brandList ;}}

Thank you for reading this article.