json-lib包笔记

浏览数：40 / 时间：2015年06月09日

json-lib.jar开发包使用:

依赖包:
commons-beanutils.jar;
commons-httpclient.jar;
commons-lang.jar;
ezmorph.jar;不少人使用时会提示net.sf.ezmorph.xxx找不到,就是缺这个:
morph-1.0.1.jar

相关链接:
http://json-lib.sourceforge.net/
http://ezmorph.sourceforge.net/
http://morph.sourceforge.net/

使用过程中问题:
1,把bean转化为json格式时老提示如下错误:
Exception in thread "main" net.sf.json.JSONException: java.lang.NoSuchMethodException: Property ‘name‘ has no getter method
解决:声明bean为public class xxx,必须是public,我用默认类型(class xxx)都不行

2,Exception in thread "main" java.lang.NoSuchMethodError: org.apache.commons.lang.ArrayUtils.toObject([C)[Ljava/lang/Character;
原因:定义属性如下:private char[] options = new char[] { ‘a‘, ‘f‘ };好像不能处理这种类型的

3, private String func1 = "function(i){ return this.options[i]; }";
   和
   private JSONFunction func2 = new JSONFunction(new String[] { "i" },
     "return this.options[i];");
   转换后显示结果差不多:
   {"func1":function(i){ return this.options[i];,"func2":function(i){ return this.options[i]; }}

测试类:

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
public class Json {
public static void main(String[] args) {
Json j = new Json();
j.bean2json();
}
public void arr2json() {
boolean[] boolArray = new boolean[] { true, false, true };
JSONArray jsonArray = JSONArray.fromObject(boolArray);
System.out.println(jsonArray);
// prints [true,false,true]
}
public void list2json() {
List list = new ArrayList();
list.add("first");
list.add("second");
JSONArray jsonArray = JSONArray.fromObject(list);
System.out.println(jsonArray);
// prints ["first","second"]
}
public void createJson() {
JSONArray jsonArray = JSONArray.fromObject("[‘json‘,‘is‘,‘easy‘]");
System.out.println(jsonArray);
// prints ["json","is","easy"]
}
public void map2json() {
Map
map.put("name", "json");
map.put("bool", Boolean.TRUE);
map.put("int", new Integer(1));
map.put("arr", new String[] { "a", "b" });
map.put("func", "function(i){ return this.arr[i]; }");
JSONObject json = JSONObject.fromObject(map);
System.out.println(json);
// prints
// ["name":"json","bool":true,"int":1,"arr":["a","b"],"func":function(i){
// return this.arr[i]; }]
}
public void bean2json() {
JSONObject jsonObject = JSONObject.fromObject(new MyBean());
System.out.println(jsonObject);
/*
* prints
* {"func1":function(i){ return this.options[i];
* },"pojoId":1,"name":"json","func2":function(i){ return
* this.options[i]; }}
*/
}
public void json2bean() {
String json = "{name=/"json2/",func1:true,pojoId:1,func2:function(a){ return a; },options:[‘1‘,‘2‘]}";
JSONObject jb = JSONObject.fromString(json);
JSONObject.toBean(jb, MyBean.class);
System.out.println();
}
}