jsonaction.java

java与Json实例

package action;

import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.json.JSONArray;
import net.sf.json.JsonConfig;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

public class JsonAction extends Action {

	@Override
	public ActionForward execute(ActionMapping mapping, ActionForm form,
			HttpServletRequest request, HttpServletResponse response)
			throws Exception {
		// TODO Auto-generated method stub
		response.setCharacterEncoding("GBK");
		List list=new ArrayList();
		Student student=new Student(); 
		student.setName("普罗米修斯");
		student.setAge(12);
		student.setBirthday(new Date());
		list.add(student);
		student=new Student(); 
		student.setName("基础");
		student.setAge(22);
		student.setBirthday(new Date());
		list.add(student);
		JsonConfig cfg=new JsonConfig();
		cfg.registerJsonValueProcessor(java.util.Date.class, new JsonValueProcessorImpl());
		cfg.registerJsonValueProcessor(java.sql.Date.class, new JsonValueProcessorImpl());
        JSONArray array = JSONArray.fromObject(list,cfg);
		PrintWriter out = response.getWriter();
		out.println(array);
		out.flush();
		out.close();
		return null;
	}

}