???json-lib的依賴包 ：
????????????commons-logging.jar?
????????????common.lang.jar
??????????? xom.jar(XMLObject Model)
??????????? commons-beanutils.jar
????????????commons-collections-3.0.jar
????????????ezmorph-0.9.2.jar
? 大概就是這些，第一個例子搞了一一個小時，依賴包太多了
?
?? json-lib可以將java中的Array,Collections,Object,XML轉化成json對象
????
???? ?
http://json-lib.sourceforge.net/usage.html
我按照官方文檔寫的例子：
???????
import?java.util.ArrayList;
import?java.util.HashMap;
import?java.util.List;
import?java.util.Map;
import?net.sf.json.*;
public?class?Test?{
????/**
?????*?@param?args
?????*/
????private?static?boolean[]?boolArray={true,false};
????private?static?List?list?=?new?ArrayList();???
????private?static?Map?map=new?HashMap();
????private?static?Object[]?test={new?TestBean(),new?TestBean()};
????public?static?void?main(String[]?args)?{
????
????//轉換Array
????JSONArray?jsonArray?=?JSONArray.fromObject(?boolArray?);???
????//System.out.println(jsonArray.toString());
????JSONArray?jsonArray1=JSONArray.fromObject("['1','2','3']");
????//System.out.println(jsonArray1.toString());
????
????list.add("first");???
????list.add("second");???
????//list.add(new?TestBean());
????//轉換List
????JSONArray?jsonList?=?JSONArray.fromObject(list);???
????System.out.println(jsonList);???
????//轉換map
????map.put("name",?"windfree");
????map.put("bool",?Boolean.TRUE);
????map.put("int",new?Integer(0));
????map.put(?"arr",?new?String[]{"a","b"}?);
????map.put("func",?"function?(i){?return?this.arr[i];?}");
????map.put("bean",test);
????JSONObject?jsonMap?=?JSONObject.fromObject(map);???
????//System.out.println(jsonMap);???
????//轉換Bean
????JSONObject?jsonBean=JSONObject.fromObject(new?TestBean());
????//System.out.println(jsonBean);
????
????
????}
}
輸出結果
：
[true,false]
["1","2","3"]
["first","second"]
{"bean":[{"name":"windfree","pojoId":1,"func1":function(i){?return?this.options[i];?},"func2":function(i){?return?this.options[i];?},"options":["a","f"]},
{"name":"windfree","pojoId":1,
"func1":function(i){?return?this.options[i];?},
"func2":function(i){?return?this.options[i];?},
"options":["a","f"]}],"arr":["a","b"],"int":0,"name":"windfree",
"func":function?(i){?return?this.arr[i];?},
"bool":true}
{"name":"windfree","pojoId":1,"func1":function(i){?return?this.options[i];?},"func2":function(i){?return?this.options[i];?},"options":["a","f"]}
最近也在看GWT,GWT包中有一關于json的例子，
?
http://code.google.com/webtoolkit/documentation/examples/jsonrpc/demo.html?例子中的json對象為一個js文件，我用servlet重新寫了一下。
Thumbnail類：
???????????????????
package?com.windfree.server;
public?class?Thumbnail?{
????private?String?Url="http://scd.mm-c1.yimg.com/image/1135881977";
????private?int?Height=120;
????private?int?Width=99;
????public?int?getHeight()?{
????????return?Height;
????}
????public?void?setHeight(int?height)?{
????????Height?=?height;
????}
????public?String?getUrl()?{
????????return?Url;
????}
????public?void?setUrl(String?url)?{
????????Url?=?url;
????}
????public?int?getWidth()?{
????????return?Width;
????}
????public?void?setWidth(int?width)?{
????????Width?=?width;
????}
????public?Thumbnail(String?url,?int?height,?int?width)?{
????????super();
????????Url?=?url;
????????Height?=?height;
????????Width?=?width;
????}
}
Result類：
??
package?com.windfree.server;
public?class?Result?{
????private?String?Title;
????private?String?Url;
????private?String?ClickUrl;
????private?String?RefererUrl;
????private?String?FileFormat;
????private?int?Height;
????private?int?Width;
????private?Thumbnail?thumbnail;
????public?Result(String?title,?String?url,?String?clickUrl,?String?refererUrl,?String?fileFormat,?int?height,?int?width,?Thumbnail?thumbnail)?{
????????super();
????????Title?=?title;
????????Url?=?url;
????????ClickUrl?=?clickUrl;
????????RefererUrl?=?refererUrl;
????????FileFormat?=?fileFormat;
????????Height?=?height;
????????Width?=?width;
????????this.thumbnail?=?thumbnail;
????}
????public?String?getClickUrl()?{
????????return?ClickUrl;
????}
????public?void?setClickUrl(String?clickUrl)?{
????????ClickUrl?=?clickUrl;
????}
????public?String?getFileFormat()?{
????????return?FileFormat;
????}
????public?void?setFileFormat(String?fileFormat)?{
????????FileFormat?=?fileFormat;
????}
????public?int?getHeight()?{
????????return?Height;
????}
????public?void?setHeight(int?height)?{
????????Height?=?height;
????}
????public?String?getRefererUrl()?{
????????return?RefererUrl;
????}
????public?void?setRefererUrl(String?refererUrl)?{
????????RefererUrl?=?refererUrl;
????}
????public?Thumbnail?getThumbnail()?{
????????return?thumbnail;
????}
????public?void?setThumbnail(Thumbnail?thumbnail)?{
????????this.thumbnail?=?thumbnail;
????}
????public?String?getTitle()?{
????????return?Title;
????}
????public?void?setTitle(String?title)?{
????????Title?=?title;
????}
????public?String?getUrl()?{
????????return?Url;
????}
????public?void?setUrl(String?url)?{
????????Url?=?url;
????}
????public?int?getWidth()?{
????????return?Width;
????}
????public?void?setWidth(int?width)?{
????????Width?=?width;
????}
}
JSONHttpServlet類：
???
package?com.windfree.server;
import?java.io.IOException;
import?java.io.PrintWriter;
import?java.util.HashMap;
import?java.util.Map;
import?javax.servlet.ServletException;
import?javax.servlet.http.HttpServlet;
import?javax.servlet.http.HttpServletRequest;
import?javax.servlet.http.HttpServletResponse;
import?net.sf.json.JSONObject;
public?class?JSONHttpServlet?extends?HttpServlet?{
????/**
?????*?
?????*/
????private?static?final?long?serialVersionUID?=?1L;
????private?static?Map?map=new?HashMap();
????private?static?Map?map2=new?HashMap();
????@Override
????protected?void?doGet(HttpServletRequest?request,?HttpServletResponse?response)?throws?ServletException,?IOException?{
????????this.doPost(request,?response);?
????}
????@Override
????protected?void?doPost(HttpServletRequest?request,?HttpServletResponse?response)?throws?ServletException,?IOException?{
????????Thumbnail?tmail1=new?Thumbnail("http://scd.mm-c1.yimg.com/image/1135881977",200,203);
????????Thumbnail?tmail2=new?Thumbnail("http://scd.mm-c1.yimg.com/image/1135881977",100,100);
????????Result?reulst1=new?Result("111","222","333","444","555",100,100,tmail1);
????????Result?reulst2=new?Result("111","222","333","444","555",100,100,tmail2);
????????map.put("totalResultsAvailable",?"144429");
????????map.put("totalResultsReturned",?2);
????????map.put("firstResultPosition",?1);
????????map.put("result",new?Result[]{reulst1,reulst2});
????????map2.put("Results",?map);
????????JSONObject?jsonMap=JSONObject.fromObject(map2);
????????PrintWriter?out?=?response.getWriter();
????????out.println(jsonMap.toString());
????}
}
在例子中的配置文件中的配置文件(JSON.gwt.xml)增加
???<servlet path="/jsonTest"
? ?? class="com.windfree.server.JSONHttpServlet"/>
同時將JSON.java中的URL改為/jsonTest。就可以了。
???結果：
?????????
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