1、javascript前端jQuery代码：
/*动态加载工厂函数*/
$(function(){
/*实时查询信息*/
realTimeQuery();
});
/*实时信息*/
function realTimeQuery(){$.ajax("realTime.do",{
type:"post",
data:{pageSize:$("#pageSize").val()},
dataType:"json",
success:function(data){ //参数data为后台获取的数据
$(".log").remove();
for(i in data.data){ //data.data指的是数组，i为数组的索引
var tr;
tr= '<td>'+data.data[i].received+'</td>'+'<td>'+data.data[i].sourceIp+'</td>'+
'<td>'+data.data[i].sourceHostname+'</td>'+'<td>'+data.data[i].facility+'</td>'+
'<td>'+data.data[i].severity+'</td>'+'<td>'+data.data[i].origin+'</td>'+
'<td>'+data.data[i].tag+'</td>'+
'<td colspan="3">'+data.data[i].message+'</textarea></td>';
if(i%2==0){$("#table1").append('<tr class="log" style="background-color:lightblue;">'+tr+'</tr>');
}else{
$("#table1").append('<tr class="log">'+tr+'</tr>');
}
}
},
error:function(){
console.log("实时信息，请求失败");
clearTimeout(t);
}
});
t=setTimeout('realTimeQuery()', 20000);//每隔20秒，查询一次。
};
2、java后端代码：
/**
* 信息处理控制层
* @author Administrator
*
*/
@Controller
public class SyslogController {
@Resource
private SyslogService syslogService;
/**
* 实时信息展示
*/
@RequestMapping("/realTime.do")
public String realTimeQuery(Integer pageSize,HttpServletRequest request,HttpServletResponse response){
//判断是否为登录用户
String userCode = (String)request.getSession().getAttribute("userCode");
if(userCode!=null&&userCode!=""){
//实时查询
Page page = new Page(1,pageSize,pageSize,"","","","","","","","");
List<Syslog> list = this.syslogService.getSyslogList(page);
//返回数据
JSONArray jsonArray = new JSONArray();
for(Syslog syslog:list){
JSONObject jsonLog = new JSONObject();
jsonLog.put("received", syslog.getReceived());
jsonLog.put("sourceIp", syslog.getSourceIp());
jsonLog.put("sourceHostname", syslog.getSourceHostname());
jsonLog.put("facility", syslog.getFacility());
jsonLog.put("severity", syslog.getSeverity());
jsonLog.put("origin", syslog.getOrigin());
jsonLog.put("tag", syslog.getTag());
jsonLog.put("message", syslog.getMessage());
jsonArray.add(jsonLog);
}
JSONObject result = new JSONObject();
result.put("data", jsonArray);
try {
response.setCharacterEncoding("UTF-8");
response.setContentType("application/json" );
PrintWriter wr = response.getWriter();
wr.write(result.toString());
wr.flush();
wr.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return "/main.jsp";
}
}
3、web.xml配置文件
<!-- DispatcherServlet请求分发 -->
<servlet>
<servlet-name>DispatcherServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>DispatcherServlet</servlet-name>
<url-pattern>*.do</url-pattern>