JSON 字串 與 java 物件的轉換
//json-lib-2.2-jdk15.jar
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
1. //把java 物件列表轉換為json物件陣列，並轉為字串
JSONArray array =JSONArray.fromObject(userlist);
String jsonstr = array.toString();
2.//把java物件轉換成json物件，並轉化為字串
JSONObject object =JSONObject.fromObject(invite);
Log4jInit.ysulogger.debug(object.toString());
3.//把JSON字串轉換為JAVA 物件陣列
String personstr = getRequest().getParameter("persons");
JSONArray json = JSONArray.fromObject(personstr);
List<InvoidPerson> persons = (List<InvoidPerson>)JSONArray.toCollection(json, nvoidPerson.class);
4.//把JSON字串轉換為JAVA 物件
str = "{\"lendperson\":\"李四\",\"lendcompany\":\"有限公司\",\"checkperson\":\"李四\",
\"lenddate\":\"2010-07-19T00:00:00\",\"lendcounts\":4,\"
passports\":[{\"passportid\":\"d\",\"name\":\"李豫川\",\"passporttype\":\"K\"},
{\"passportid\":\"K9051\",\"name\":\"李平\",\"passporttype\":\"K\"},
{\"passportid\":\"K90517\",\"name\":\"袁寒梅\",\"passporttype\":\"K\"},
{\"passportid\":\"K905199\",\"name\":\"賀明\",\"passporttype\":\"K\"}]}";
JSONObject jsonobject = JSONObject.fromObject(str);
PassportLendsEntity passportlends = null;
try {
//獲取一個json陣列
JSONArray array = jsonobject.getJSONArray("passports");
//將json陣列 轉換成 List<PassPortForLendsEntity>泛型
List<PassPortForLendsEntity> list = new ArrayList<PassPortForLendsEntity>();
for (int i = 0; i < array.size(); i++) {
JSONObject
object = (JSONObject)array.get(i);
PassPortForLendsEntity
passport = (PassPortForLendsEntity)JSONObject.toBean
PassPortForLendsEntity.class);
if(passport != null){
list.add(passport);
}
}
//轉換PassportLendsEntity 實體類
passportlends = (PassportLendsEntity)JSONObject.toBean(jsonobject, PassportLendsEntity.class);