防止用户直接访问jsp页面的几种办法：
1.把JSP页面放在WEB-INF目录下，存放在此目录或者它的子目录里的任何东西都受到了保护。
不过，不太推荐，因为并非所有的容器都具有这种保护机制，例如WebLogic就做不到这一点。
2.使用servlet过滤器或者struts过过滤器来过滤对jsp页面的请求。
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpServletRequestWrapper;
public class CharsetFilter implements Filter {
@Override
public void destroy() {
// TODO Auto-generated method stub
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
throws IOException, ServletException {
try{
HttpServletRequest httpRequest = (HttpServletRequest)request;
HttpServletResponse httpResponse = (HttpServletResponse)response;
//过滤直接访问jsp的页面
String uri = httpRequest.getRequestURI();
if(uri.endsWith(".jsp")){
httpResponse.sendRedirect(request.getServletContext().getContextPath()+"/login/preLoginAction.jspx");
return;
}
String method = httpRequest.getMethod().toLowerCase();
/*System.out.println("### method is "+ method);*/
if(method.equals("post")){
//如果 是post,即表单方法，直接设置charset即可
request.setCharacterEncoding("UTF-8");
}else if(method.equals("get")){
request.setCharacterEncoding("UTF-8");
request = new HttpServletRequestWrapper(httpRequest){
@Override
public Map<String, String[]> getParameterMap() {
Map<String,String[]> map = super.getParameterMap();
Set<Entry<String,String[]>> set = map.entrySet();
Iterator<Entry<String,String[]>> it = set.iterator();
Map<String,String[]> newmap = new HashMap<String, String[]>();
while(it.hasNext()){
Entry<String,String[]> entry = it.next();
String[] values = entry.getValue();
String name = entry.getKey();
//System.out.println("KEY:"+entry.getKey()+"VALUE: "+entry.getValue());
{
String newvalues[] = new String[values.length];
for(int i=0; i<values.length;i++){
String value = values[i];
try {
value = new String(value.getBytes("iso8859-1"),"UTF-8");
} catch (UnsupportedEncodingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
newvalues[i] = value; //解决乱码后封装到Map中
}
newmap.put(name, newvalues);
}
}
return newmap;
}
@Override
public String[] getParameterValues(String name) {
// TODO Auto-generated method stub
return super.getParameterValues(name);
}
@Override
public String getParameter(String str){
try{
String strTr = new String(super.getParameter(str).getBytes("ISO-8859-1"),"UTF-8");
return strTr;
}catch(Exception e){
return null;
}
}
};
}
chain.doFilter(request, response);
}catch(Exception e){
}
}
@Override
public void init(FilterConfig arg0) throws ServletException {
// TODO Auto-generated method stub
}
}
或者
import javax.servlet.*;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.io.Writer;
/**
* Created by a on 2016/3/17.
*/
public class AdminSessionFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain)
throws ServletException {
HttpServletRequest request = (HttpServletRequest) servletRequest;
HttpServletResponse response = (HttpServletResponse) servletResponse;
HttpSession session = request.getSession();
String uri = request.getRequestURI();
if (uri.indexOf("/img/") < 0
&& uri.indexOf("/css/") < 0
&& uri.indexOf("/login/") < 0
&& uri.indexOf("/zhiboapi/") < 0
&& session.getAttribute("admin") == null) {//在没有登陆的情况下，除了这几个不能直接访问其他的目录
Writer writer = null;
try {
writer = response.getWriter();
writer.write("<script>top.location.href=\"" + request.getContextPath() + "/login/loginAction.jspx\"</script>");//framesetbug,直播跳转到首页
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
writer.flush();
writer.close();
} catch (IOException e) {
}
}
} else {
try {
filterChain.doFilter(servletRequest, servletResponse);
} catch (IOException e) {
e.printStackTrace();
}
}
}
@Override
public void destroy() {
}
}
3.在部署文件web.xml中使用安全限制.这个比过滤器容易,不用另外编写一个过滤器了.配置如下:
<span style="margin: 0px; padding: 0px; border: 0px; font-size: 18px; background: transparent;"><security-constraint>
<web-resource-collection>
<web-resource-name>JSPs</web-resource-name>
<url-pattern>/web/*</url-pattern><!-- 拒绝直接访问web文件夹下的所有页面 -->
</web-resource-collection>
<auth-constraint/>
</security-constraint>
<login-config>
<auth-method>BASIC</auth-method><!-- 验证方式(BASIC/FORM) -->
</login-config></span>
<span style="margin: 0px; padding: 0px; border: 0px; font-size: 18px; background: transparent;"> <web-resource-name>QNJYZXT</web-resource-name><!--<span style="margin: 0px; padding: 0px; border: 0px; font-family: Arial, Helvetica, sans-serif; background: transparent;">QNJYZXT为</span><span style="margin: 0px; padding: 0px; border: 0px; font-family: Arial, Helvetica, sans-serif; background: transparent;">包含资源的文件名（可以使项目名称）</span>--></span>
<span style="margin: 0px; padding: 0px; border: 0px; font-size: 18px; background: transparent;"><url-pattern>/web/*</url-pattern><!-- 拒绝直接访问web文件夹下的所有页面 --></span>
还可以设置限制访问角色
《JSP页面中限制对 Web 资源的访问》这篇文章中有介绍