java返回json和json数组

  1 package winclpt;
  2 
  3 import java.io.BufferedReader;
  4 import java.io.IOException;
  5 import java.io.InputStreamReader;
  6 import java.text.SimpleDateFormat;
  7 
  8 import javax.servlet.ServletInputStream;
  9 import javax.servlet.ServletOutputStream;
 10 import javax.servlet.http.HttpServletRequest;
 11 import javax.servlet.http.HttpServletResponse;
 12 
 13 import net.sf.json.JSONArray;
 14 import net.sf.json.JSONObject;
 15 import net.sf.json.JsonConfig;
 16 import net.sf.json.processors.JsonValueProcessor;
 17 import wumart.base.BasePO;
 18 
 19 public class BaseService extends wumart.base.BaseService{
 20     final protected JsonConfig jsonConfig = new JsonConfig();	
 21     private SimpleDateFormat sd = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
 22     public BaseService(){
 23         jsonConfig.registerJsonValueProcessor(java.util.Date.class,new JsonValueProcessor() {	//处理单个Date对象 
 24               public Object processObjectValue(String key, Object date, JsonConfig jsonConfig) {
 25                 return  value == null ?"" : sd.format(date);
 26               }
 27               public Object processArrayValue(Object date, JsonConfig jsonConfig) {	//处理数组中的Date对象 
 28                 return null;
 29               }
 30         });
 31     }
 32     protected void ReturnPO(HttpServletResponse response, BasePO po) {	//返回json
 33         ServletOutputStream out = null;
 34         try {
 35             response.setContentType("text/json; charset=UTF-8");
 36             out = response.getOutputStream();
 37 
 38             JSONObject json = JSONObject.fromObject(po , jsonConfig);            
 39             out.write(json.toString().getBytes("UTF-8"));//
 40 
 41         } catch (IOException e) {
 42             // TODO Auto-generated catch block
 43             e.printStackTrace();
 44         } finally {
 45             if (out != null)
 46                 try {
 47                     out.close();
 48                 } catch (IOException e) {
 49                     // TODO Auto-generated catch block
 50                     e.printStackTrace();
 51                 }
 52         }
 53         out = null;
 54     }
 55 
 56     protected void ReturnPOs(HttpServletResponse response, Object[] pos) {	//返回json数组
 57         ServletOutputStream out = null;
 58         try {
 59             response.setContentType("text/json; charset=UTF-8");
 60             out = response.getOutputStream();
 61             JSONArray array = JSONArray.fromObject(pos , jsonConfig);
 62             out.write(array.toString().getBytes("UTF-8"));
 63 
 64         } catch (Exception e) {
 65             // TODO Auto-generated catch block
 66             e.printStackTrace();
 67         } finally {
 68             if (out != null)
 69                 try {
 70                     out.close();
 71                 } catch (IOException e) {
 72                     // TODO Auto-generated catch block
 73                     e.printStackTrace();
 74                 }
 75         }
 76         out = null;
 77     }
 78 
 79     protected JSONObject GetJsonObject(HttpServletRequest request) {
 80         String json = getJson(request);
 81         JSONObject reqJson = JSONObject.fromObject(json);
 82         return reqJson;
 83     }
 84 
 85     protected String getJson(HttpServletRequest request) {
 86 
 87         try {
 88             ServletInputStream inputStream = (ServletInputStream) request
 89                     .getInputStream();
 90             InputStreamReader streamReader = new InputStreamReader(inputStream,
 91                     "utf-8");
 92             BufferedReader reader = new BufferedReader(streamReader);
 93             StringBuffer sb = new StringBuffer("");
 94             String temp;
 95             while ((temp = reader.readLine()) != null) {
 96                 sb.append(temp);
 97             }
 98             reader.close();
 99             reader = null;
100             streamReader.close();
101             streamReader = null;
102             inputStream.close();
103             inputStream = null;
104 
105             return sb.toString();
106 
107         } catch (IOException e) {
108             // TODO Auto-generated catch block
109             e.printStackTrace();
110         }
111 
112         return null;
113     }    
114 }