1、servlet List转json
需要jar包，可以到我github下载
commons-beanutils-1.7.0.jar
commons-collections-3.2.jar
commons-httpclient-3.0.1.jar
commons-lang-2.4.jar
commons-logging-1.0.4.jar
ezmorph-1.0.3.jar
json-lib-2.2.3-jdk15.jar
代码：
import java.io.IOException;import java.util.ArrayList;import java.util.List;import javax.servlet.ServletException;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import net.sf.json.JSONArray;@WebServlet("/searchMeg")public class searchMeg extends HttpServlet {private static final long serialVersionUID = 1L;protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {response.setCharacterEncoding("UTF-8");String name=request.getParameter("name");name=new String(name.getBytes("ISO-8859-1"),"UTF-8");System.out.println(name);List<String> list =new ArrayList<String>();list.add(name);list.add(name+name);list.add(name+name+name);list.add(name+name+name+name);// 集合转为jsonresponse.getWriter().println(JSONArray.fromObject(list).toString());/*System.out.println(JSONArray.fromObject(list));*/}}
2、springMVC List转json
用@ResponseBody注解方法返回类型List，会把List转为json
@RequestMapping(value = "getOldNodes", method = RequestMethod.GET)public @ResponseBody List getOldNodes(HttpSession session){//转json传给jsList list=new ArrayList() ;list.add(nodes);list.add(relations);return list; }
