实现目标
读取文件中的json格式数据，一行为一条json格式数据。进行解析封装成实体类。
通过google的Gson对象解析json格式数据
我现在解析的json格式数据为：
{"id": "","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"},
代码实现
1、实体类
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、读取文件
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.List; /**
* 读取文件
*
* @author zcr
*
*/
public class ImportFile
{
/**
* 功能：Java读取txt文件的内容 步骤：1：先获得文件句柄 2：获得文件句柄当做是输入一个字节码流，需要对这个输入流进行读取
* 3：读取到输入流后，需要读取生成字节流 4：一行一行的输出。readline()。 备注：需要考虑的是异常情况
*
* @param filePath
* 文件路径[到达文件:如： D:\aa.txt]
* @return 将这个文件按照每一行切割成数组存放到list中。
*/
public static List<String> readTxtFileIntoStringArrList(String filePath)
{
List<String> list = new ArrayList<String>();
try
{
String encoding = "UTF-8";
File file = new File(filePath);
if (file.isFile() && file.exists())
{ // 判断文件是否存在
InputStreamReader read = new InputStreamReader(
new FileInputStream(file), encoding);// 考虑到编码格式
BufferedReader bufferedReader = new BufferedReader(read);
String lineTxt = null; while ((lineTxt = bufferedReader.readLine()) != null)
{
if (isRightFormat(lineTxt))
{
list.add(lineTxt.substring(lineTxt.indexOf("{"),lineTxt.lastIndexOf(',')));
}
}
read.close();
}
else
{
System.out.println("找不到指定的文件");
}
}
catch (Exception e)
{
System.out.println("读取文件内容出错");
e.printStackTrace();
} return list;
} public static void main(String argv[])
{
String filePath = "C:\\Users\\owner\\Desktop\\卓信科技实习\\stores.json";
List<String> dataList = readTxtFileIntoStringArrList(filePath); for(int i = 0 ; i < dataList.size() ; i ++)
{
System.out.println(dataList.get(i));
}
System.out.println(dataList.size());
} /**
* 判断数据是否是合法的格式
* @param jsonStr 带判断的数据
* @return 返回该行是否是正确的格式
*/
public static boolean isRightFormat(String jsonStr)
{
return jsonStr.matches("[\\p{Space}]*[{]{1}.*[}]{1}[,]{1}");
} }
3、方法调用及测试
/**
* 格式化json数据
* @author zcr
*
*/
public class FormatJson
{
public static void main(String[] args)
{
String filePath = "C:\\Users\\owner\\Desktop\\卓信科技实习\\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());
} /**
* 将json格式数据转换成Import对象
* @param jsonStr 带转换的json对象
* @return json格式数据对应的对象
*/
public static ImportBrand formatFromJsonToObject(String jsonStr)
{
Gson gson = new Gson();
ImportBrand brand = gson.fromJson(jsonStr,ImportBrand.class); return brand;
} /**
* 将String类型的json格式转换为ImportBrand类型的集合
* @param jsonStrList 待转换的json格式List对象
* @return json格式对象转换而成的ImportBrand对象集合
*/
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;
} /**
* 读取文件，将json格式的数据转换成List对象的ImportBrand
* @param filePath 读取的文件路径
* @return
*/
public static List<ImportBrand> formatFileListToBrand(String filePath)
{
List<String> dataList = ImportFile.readTxtFileIntoStringArrList(filePath);
List<ImportBrand> brandList = formatStringListToBrand(dataList); return brandList;
}
}
致谢：感谢您的阅读.