使用Jackson框架解析Json示例

首先需要下载包：jackson-databind-2.0.5.jarjackson-annotations-2.0.5.jarjackson-core-2.0.5.jar，网址在：http://wiki.fasterxml.com/JacksonDownload 

 

custom.json:

{
    "country":"USA",   
    "countryInfo":{"golden":40,"silver":23,"copper":33,"tank":1},  
"countryDetail":[  
    {"id":"no","header":"号码","fieldIndex":"no","sortOrder": null,"printable": true},  
    {"id":"name","header":"姓名","fieldIndex":"name","sortOrder": null,"printable": true},  
    {"id":"total","header":"总成绩","fieldIndex":"total","sortOrder": null,"printable": true},  
    {"id":"detail","header":"详细信息","fieldIndex":"detail","sortOrder": null,"printable": true}  
   ], 

"orgood":true}  

Java的Bean及解析: 

import java.io.File;
import java.io.IOException;
import com.fasterxml.jackson.core.JsonParseException;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.ObjectMapper;


public  class Bean{
    
     private String country;
     private  boolean orgood;
     private Country countryInfo;
     private CountryDetail[] countryDetail;
    
     public String getCountry() {
         return country;
    }

     public  void setCountry(String country) {
         this.country = country;
    }

     public  boolean isOrgood() {
         return orgood;
    }

     public  void setOrgood( boolean orgood) {
         this.orgood = orgood;
    }

     public Country getCountryInfo() {
         return countryInfo;
    }

     public  void setCountryInfo(Country countryInfo) {
         this.countryInfo = countryInfo;
    }

     public CountryDetail[] getCountryDetail() {
         return countryDetail;
    }

     public  void setCountryDetail(CountryDetail[] countryDetail) {
         this.countryDetail = countryDetail;
    }
    
     public  static  class Country{
         public String getGolden() {
             return golden;
        }
         public  void setGolden(String golden) {
             this.golden = golden;
        }
         public String getSilver() {
             return silver;
        }
         public  void setSilver(String silver) {
             this.silver = silver;
        }
         public String getCopper() {
             return copper;
        }
         public  void setCopper(String copper) {
             this.copper = copper;
        }
         public String getTank() {
             return tank;
        }
         public  void setTank(String tank) {
             this.tank = tank;
        }
         private String golden;
         private String silver;
         private String copper;
         private String tank;
        
    }
    
     public  static  class CountryDetail{
         public String getId() {
             return id;
        }
         public  void setId(String id) {
             this.id = id;
        }
         public String getHeader() {
             return header;
        }
         public  void setHeader(String header) {
             this.header = header;
        }
         public String getFieldIndex() {
             return fieldIndex;
        }
         public  void setFieldIndex(String fieldIndex) {
             this.fieldIndex = fieldIndex;
        }
         public String getSortOrder() {
             return sortOrder;
        }
         public  void setSortOrder(String sortOrder) {
             this.sortOrder = sortOrder;
        }
         public  boolean isPrintable() {
             return printable;
        }
         public  void setPrintable( boolean printable) {
             this.printable = printable;
        }
         private String id;
         private String header;
         private String fieldIndex;
         private String sortOrder;
         private  boolean printable;
        
    }
    
     public  static  void main(String args[]){
        ObjectMapper mapper =  new ObjectMapper();
         try {
            Bean bean = mapper.readValue( new File("custom.json"), Bean. class);

    //读取 

            System.out.println("Country:"+bean.getCountry());
            System.out.println("CountryInfo:"+bean.getCountryInfo().getGolden());
            System.out.println("CountryDetail:"+bean.getCountryDetail()[1].getHeader());
            System.out.println("orgood:"+bean.isOrgood());
        } catch (JsonParseException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (JsonMappingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }

}