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();

String filePath = System.getProperty("user.dir") + File.separator + "WebContent" + File.separator + "json" + File.separator + "custom.json";

try {

Bean bean = mapper.readValue(new File(filePath), 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();

}

}

}

List<Content> contentList = null;

List<IntervalContent> intevContentList = null;

if(StringUtil.isNotEmpty(contentStr)){

try {

//传过来的json转为对象

if(rundataConfig.getDisplay() == 0){

contentList = mapper.readValue(contentStr,new TypeReference<List<Content>>() {});

}else{

intevContentList = mapper.readValue(contentStr,new TypeReference<List<IntervalContent>>() {});

}

} catch (JsonParseException e) {

e.printStackTrace();

} catch (JsonMappingException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}