JSON与XML两者目前在数据交互方面都有很高的使用率，随着现在SOA的兴起，异构系统的整合地位相应提高，本篇文章主要介绍JSON与JAVA对象之间的相互转换。一、对普通类型的JSON模式的转换一般JSON为最普通的String类型组成，没有其它Data或Object等这种特殊类形，具体例子如下：JSON:
jsonString = {"name":"jack","sex":"men","age":23};JAVA BEAN:
public class Person{
private String name;
private String sex;
private Integer age;...omit get or set method...
}现在如果我们想把上面的JSON格式转为Java bean类，常用方法为：jsonObject = JSONObject.fromObject(jsonString);
Object results = JSONObject.toBean(jsonObject, Person.class);这样返回来的数据就为Person类型的实例，在JSONObject.toBean();的方法签名中第一个参数为jsonObject对象，第二个参数为要转换后的JAVA BEAN的class类。二、对有Date或List类型的转换JSON:
jsonString = {"name":"jack","sex":"women","birthday":"2010-06-12","address":[{"officeAttr":"NEWS RORK","HomeAttr":"beijing"},{"officeAttr":"taiyuan","HomeAttr":"hongkong"}]};JAVA BEAN:public class Person{
private String name;
private String sex;
private Date birthday;private List<Address> address;...omit get or set method...
}public class Address{
private String officeAttr;
private String homeAttr;...omit get or set method...
}现在如果我们想把上面的JSON格式转为Java bean类，常用方法为：JSONUtils.getMorpherRegistry().registerMorpher(new JsonDateValueProcessor(new String[] { "yyyy-MM-dd","yyyy-MM-dd HH:mm:ss" }));Map<String,Class> map = new HashMap<String,Class>();
map.put("address",Address.class);  //map中的key值为json中list的key值，value为Address的class类对象
jsonObject = JSONObject.fromObject(jsonString);
Object results = JSONObject.toBean(jsonObject, Person.class, map);public class JsonDateValueProcessor implements JsonValueProcessor {private String format = "yyyy-MM-dd HH:mm:ss";public JsonDateValueProcessor() {}public JsonDateValueProcessor(String format) {
this.format = format;
}public Object processArrayValue(Object value, JsonConfig jsonConfig) {
return process(value, jsonConfig);
}public Object processObjectValue(String key, Object value, JsonConfig jsonConfig) {
return process(value, jsonConfig);
}private Object process( Object value, JsonConfig jsonConfig ) {
if (value instanceof Date) {
String str = new SimpleDateFormat(format).format((Date) value);
return str;
}
return value == null ? null : value.toString();
}public String getFormat() {
return format;
}public void setFormat(String format) {
this.format = format;
}}