sonLib 经典文章：http://json-lib.sourceforge.net/xref-test/net/sf/json/TestJSONObject.html// 引入相应的包
//json-lib-2.2-jdk15.jar
import net.sf.json.JSONArray;import net.sf.json.JSONObject;
1. //把java 对象列表转换为json对象数组，并转为字符串
JSONArray array = JSONArray.fromObject(userlist); String jsonstr = array.toString();
2.//把java对象转换成json对象，并转化为字符串
JSONObject object = JSONObject.fromObject(invite); Log4jInit.ysulogger.debug(object.toString());
3.//把JSON字符串转换为JAVA 对象数组
String personstr = getRequest().getParameter("persons"); JSONArray json = JSONArray.fromObject(personstr); List<InvoidPerson> persons = (List<InvoidPerson>)JSONArray.toCollection(json, nvoidPerson.class);4.//把JSON字符串转换为JAVA 对象
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/":/"贺明/",/"passporttype/":/"K/"}]}"; JSONObject jsonobject = JSONObject.fromObject(str); PassportLendsEntity passportlends = null; try { //获取一个json数组 JSONArray array = jsonobject.getJSONArray("passports"); //将json数组 转换成 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(object, PassPortForLendsEntity.class); if(passport != null){ list.add(passport); } } //转换PassportLendsEntity 实体类 passportlends = (PassportLendsEntity)JSONObject.toBean(jsonobject, PassportLendsEntity.class);
