使用Struts2拦截器实现日志管理系统

转自http://bbs.java.ccidnet.com/read.php?tid=640304

最近一个项目客户要求能够监控用户对系统的详细操作步骤，比如某人在某时间删除了某个模块的某条数据，经过一番斟酌，决定用struts2的拦截器功能实现日志管理系统，因为系统是旧系统(SSH架构)了，用struts2就可以不用修改系统的原有的类或者方法，而且可以精确到用户的具体操作，并且所有的日志管理代码直接写在拦截器里即可。代码如下：
  Java代码
@SuppressWarnings("serial")
public class LogInterceptor extends AbstractInterceptor{ 
    private String logName;
    private String logContent;
    protected Logger log = Logger.getLogger(getClass()); 
 
    public void init() {
    }
    @Override
    public String intercept(ActionInvocation ai) throws Exception  {  
      Map session = ai.getInvocationContext().getSession();
      Object action = ai.getAction();
      String method = ai.getProxy().getMethod();
      try{
          if(StringUtils.isBlank(method)) method = "method"; 
          SysUser sysUser = (SysUser)session.get(Constants.SESSION_USER_KEY);
          String userName = ""; 
          if(sysUser!=null) userName = sysUser.getUserName();
          String currentTime = TimeHelper.getCurrentTime();
          String logContentHead = "用户"+userName+currentTime;  
          ai.invoke();//执行被拦截action
        
          if (action instanceof SysOrgAction) {
              if(method.equals("save")){
                  logName = "保存部门";
                  logContent = logContentHead +"保存部门："+ai.getStack().findValue("sysOrg.orgName");  
                  log.info(logContent);
                  addSysLog(logName,logContent);
              }
              if(method.equals("delete")){  
                  logName = "删除部门";  
                  logContent = logContentHead +"删除"+((String[])(ai.getStack().findValue("flag_id"))).length+"条部门信息"; 
                  log.info(logContent);
                  addSysLog(logName,logContent);  
              }
          }
          if (action instanceof SysOrgForAdmAction) { 
              if(method.equals("save")){ 
                  logName = "保存单位"; 
                  logContent = logContentHead +"保存单位："+ai.getStack().findValue("sysOrg.orgName");
                  log.info(logContent);
                  addSysLog(logName,logContent);
              } 
              if(method.equals("delete")){
                  logName = "删除单位"; 
                  logContent = logContentHead +"删除1条单位信息";
                  log.info(logContent); 
                  addSysLog(logName,logContent); 
              } 
          }
          if (action instanceof SysUserAction || action instanceof SysUserForAdmAction) {
              if(method.equals("save")){  
                  logName = "保存用户";
                  logContent = logContentHead +"保存用户："+ai.getStack().findValue("sysUser.userName"); 
                  log.info(logContent);  
                  addSysLog(logName,logContent); 
              }
              if(method.equals("delete")){ 
                  logName = "删除用户";
                  logContent = logContentHead +"删除"+((String[])(ai.getStack().findValue("flag_id"))).length+"条用户信息";  
                  log.info(logContent);
                  addSysLog(logName,logContent);
              }
          } 
    
      }catch(Exception e){ 
          e.printStackTrace();  
      } 
      return Action.SUCCESS;
  }  
      
    
  private void addSysLog(String logName,String logContent){
      HttpServletRequest request = ServletActionContext.getRequest();
      SysLogService sysLogService = (SysLogService)ApplicationContextFactory.getApplicationContext().getBean("sysLogService");
      SysLog sysLog = new SysLog();
      sysLog.setLogName(logName); 
      sysLog.setLogContent(logContent);  
      sysLog.setLogType(Constants.LOG_TYPE_SYS); 
      sysLog.setLogTime(TimeHelper.getCurrentTime()); 
      sysLog.setLogIp(request.getRemoteAddr()); 
      sysLog.setLogKey(logName);
      sysLogService.saveLog(sysLog);
  } 
}