导包：

　　import net.sf.json.JSONArray;
　　import net.sf.json.JSONObject;

public void writeJson(Object obj) {

        HttpServletResponse response = ServletActionContext.getResponse();

        JSONArray jsonArray = JSONArray.fromObject(obj);

        response.setContentType("text/javascript; charset=utf-8");

        try {

            response.getWriter().write(jsonArray.toString());

            jsonArray = null;

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

    public void writeJsonObject(Object obj) {

        HttpServletResponse response = ServletActionContext.getResponse();

        JSONObject jsonObject = JSONObject.fromObject(obj);

        response.setContentType("text/javascript; charset=utf-8");

        try {

            response.getWriter().write(jsonObject.toString());

            jsonObject = null;

        } catch (Exception e) {

            e.printStackTrace();

        }

    }
 

导包：
import net.sf.json.JSONArray;

public void sendToForwardByList( List<SupplierAchieve> list ) {

        JSONArray jobj = JSONArray.fromObject( list );

        response.setCharacterEncoding( "utf-8" );

        try {

            response.getWriter().write( jobj.toString() );

            jobj = null;

            list = null;

        } catch( IOException e ) {

            e.printStackTrace();

        }

    }