前提：java項目lib中引入json-lib-2.2.3-jdk15.jar
1.後臺Action的模擬JSON數據
import net.sf.json.JSONArray;public class MeetingCommandAction extends DispatchAction {
public ActionForward jsonQuery(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
String key = request.getParameter("key");
System.out.println(key);
if (key != null && !"".equals(key)) {
MeetingCommandDao dao = new MeetingCommandDao();
//List list = new ArrayList();
//list = dao.selectCommandByName(key);// selectCommandByName方法已經被聲明爲list型
JSONArray jsonArray = JSONArray.fromObject(dao.selectCommandByName(key));
System.out.println(jsonArray);
//String data = "[{\"name\":\"Tom\",\"age\":22},{\"name\":\"Jerry\",\"age\":21}]";
System.out.println("ok");
try {
PrintWriter out = response.getWriter();
//response.getWriter().write(jsonArray.toString());
out.print(jsonArray);
out.flush();
out.close();
} catch (Exception e) {
System.out.println(e.getMessage());
}
/*
Enumeration<String> e = request.getParameterNames();
while(e.hasMoreElements()){
System.out.println(e.nextElement());
}
*/
}
return null;
}
}
public List<CommandDto> selectCommandByName(String lamp_dpid) {
List<CommandDto> list = new ArrayList<CommandDto>();
try {
System.out.print(lamp_dpid);
//String sql = "select * from pointvalue where dpid=?";
String sql = "select * from pointvalue";
con = DBConnection.getConnection();
ps = con.prepareStatement(sql.toString());
//ps.setInt(1, Integer.parseInt(lamp_dpid));
rs = ps.executeQuery();
while (rs.next()) {
CommandDto dto = new CommandDto();
dto.setDpID(Integer.toString(rs.getInt("dpid")) );
//dto.setCommandValue(rs.getString("dpposition"));
dto.setCommandStatus(rs.getString("dpvalue"));
list.add(dto);
System.out.print(list.toString());
}
} catch (Exception ex) {
log.info("查詢策略列表時錯誤..." + ex.getMessage());
ex.printStackTrace();
} finally {
DBConnection.free(null, ps, con);
}
return list;
}<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'add_ajax.jsp' starting page</title>
<script src="${pageContext.request.contextPath }/js/jquery-1.6.min.js" type="text/javascript"></script>
<script src="${pageContext.request.contextPath }/js/zDialog.js" type="text/javascript"></script>
<script src="${pageContext.request.contextPath }/js/zDrag.js" type="text/javascript"></script>
<script language="JavaScript">
<!--
function getUser(){
function getStatusValues(){
$.ajax({
type: "POST",
contentType: "application/json",
url: "${pageContext.request.contextPath }/meetingcommand.do?method=jsonQuery&key=38",
data: "",
dataType: 'json',
success: function(jsonArray) {
$(jsonArray).each(function(i) {
$('#tempravalue').append(window.parseInt(jsonArray[37].commandStatus));
});
}
});
}
}
//-->
</script>
</head>
<body>
<input type="button" onClick="getUser()" value="獲取" />
<div id="show"></div>
</body>
</html>