The Spring MVC interceptor implements session control

Not logged in, not allowed to access the background folder pages, so how to determine whether to log in? background is the key directory, and everyone who works on it needs to write in the log table. How do you do that? The interceptor is implementation 1.

(1) add SystemInterceptor to the com.geloin.spring.interceptor package and make it inherit HandlerInterceptor

/** 
 * 
 * @author geloin 
 */ 
package com.geloin.spring.interceptor; 
 
import java.io.PrintWriter; 
import java.util.Iterator; 
import java.util.Map; 
 
import javax.annotation.Resource; 
import javax.servlet.http.HttpServletRequest; 
import javax.servlet.http.HttpServletResponse; 
 
import org.springframework.stereotype.Repository; 
import org.springframework.web.servlet.handler.HandlerInterceptorAdapter; 
 
import com.embest.ruisystem.form.SystemLoggerForm; 
import com.embest.ruisystem.form.SystemUserForm; 
import com.embest.ruisystem.service.SystemLoggerService; 
import com.embest.ruisystem.util.Constants; 
import com.embest.ruisystem.util.DataUtil; 
 
/** 
 * 
 * @author geloin 
 */ 
@Repository 
public class SystemInterceptor extends HandlerInterceptorAdapter { 
 
  @Resource(name = "systemLoggerService") 
  private SystemLoggerService systemLoggerService; 
 
  /* 
   * (non-Javadoc) 
   * 
   * @see 
   * org.springframework.web.servlet.handler.HandlerInterceptorAdapter#preHandle 
   * (javax.servlet.http.HttpServletRequest, 
   * javax.servlet.http.HttpServletResponse, java.lang.Object) 
   */ 
  @SuppressWarnings({ "rawtypes", "unchecked" }) 
  @Override 
  public boolean preHandle(HttpServletRequest request, 
      HttpServletResponse response, Object handler) throws Exception { 
 
    request.setCharacterEncoding("UTF-8"); 
    response.setCharacterEncoding("UTF-8"); 
    response.setContentType("text/html;charset=UTF-8"); 
 
    //  The background session control  
    String[] noFilters = new String[] { "login.html", "veriCode.html", 
        "index.html", "logout.html" }; 
    String uri = request.getRequestURI(); 
 
    if (uri.indexOf("background") != -1) { 
      boolean beFilter = true; 
      for (String s : noFilters) { 
        if (uri.indexOf(s) != -1) { 
          beFilter = false; 
          break; 
        } 
      } 
      if (beFilter) { 
        Object obj = request.getSession().getAttribute( 
            Constants.LOGINED); 
        if (null == obj) { 
 
          //  Not logged in  
          PrintWriter out = response.getWriter(); 
          StringBuilder builder = new StringBuilder(); 
          builder.append("<script type=\"text/javascript\" charset=\"UTF-8\">"); 
          builder.append("alert(\" Page expired, please login again \");"); 
          builder.append("window.top.location.href=\""); 
          builder.append(Constants.basePath); 
          builder.append("/background/index.html\";</script>"); 
          out.print(builder.toString()); 
          out.close(); 
          return false; 
        } else { 
          //  Add the log  
          String operateContent = Constants.operateContent(uri); 
          if (null != operateContent) { 
            String url = uri.substring(uri.indexOf("background")); 
            String ip = request.getRemoteAddr(); 
            Integer userId = ((SystemUserForm) obj).getId(); 
            SystemLoggerForm form = new SystemLoggerForm(); 
            form.setUserId(userId); 
            form.setIp(ip); 
            form.setOperateContent(operateContent); 
            form.setUrl(url); 
            this.systemLoggerService.edit(form); 
          } 
        } 
      } 
    } 
 
    Map paramsMap = request.getParameterMap(); 
 
    for (Iterator<Map.Entry> it = paramsMap.entrySet().iterator(); it 
        .hasNext();) { 
      Map.Entry entry = it.next(); 
      Object[] values = (Object[]) entry.getValue(); 
      for (Object obj : values) { 
        if (!DataUtil.isValueSuccessed(obj)) { 
          throw new RuntimeException(" Illegal characters: " + obj); 
        } 
      } 
    } 
 
    return super.preHandle(request, response, handler); 
  } 
 
} 

(2) modify context-dispatcher.xml to let spring manage the interceptor

<mvc:interceptors> 
  <bean class="com.geloin.spring.interceptor.SystemInterceptor" /> 
</mvc:interceptors>