2、在项目的cnitcast chapher flter 包中新建一个过滤器MyFilter01,具体实现分别如下所 @WebFilker(ilterName - "MyFiltec01",urlPwters -"/MyServet) public class MyFther0I impleerts Pilter ( public void init(FilterCoafig fConfig) throws Servletfxcepicn [ 1过滤器对象在初始化时调用,可以配置一些初始化参数 1 public void doFilter(ServletRequest request,ServletReeponse response. FilterChain chain) throws IOExoeption, ServietException Ⅱ用于拦用户的请求,如果和当数过滤卷的拦载路径匹配,该方法会被请用 PrintWriter out-response.getWriterO; chain.doFilter(request,response); out prindn("Hello MyFilter01"); 1F public vaid destroy() 过滤器对象在销毁时自动调用,释放资源 ) 在项目的cn.itcast.chapter filter 包中新建一个过滤器MyFilter02,具体实现分别如下所示 @WebFilter(filterName ="MyFilter02",urIPattems="/MyServlet") public class MyFilterO2 implements Filter ( public void init(FilterConfig fConfig) throws ServletException /1 过滤器对象在初始化时调用,可以配置一些初始化参数 1 public void doFilter(ServletRequest request, ServletResponse response. FilterChain chain) throws IOException, ServletException /用于拦截用户的请求,如果和当前过滤器的拦截路径匹配,该方法会被调用 PrintWriter out-response getWriter(; out println("MyFilter02 Before"); chain doFilter(request, response); out println("MyFilter02 After"); hlie woid destravl!在项目中新建一个过滤器MyServlet,具体实现分别如下所示@WebServlet(name-"MyServlet",urlPatterns="/MyServlet")public class MyServlet extends HttpServlet (public void service(HttpServletRequest request,HttpServletResponse response)throws ServletException, IOException (response.getWriter().printIn("Hello MyServlet"))分析浏览器在请求MYservlet时。浏览器运行结果
时间: 2024-03-05 20:52:27 浏览: 96
这个问题有点错误,代码中的注释和代码混在一起了,导致不太清晰。我来稍微整理一下,以下是三个 Java 类的代码:
MyFilter01.java:
```
@WebFilter(filterName = "MyFilter01", urlPatterns = "/MyServlet")
public class MyFilter01 implements Filter {
public void init(FilterConfig fConfig) throws ServletException {
// 过滤器对象在初始化时调用,可以配置一些初始化参数
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
// 用于拦截用户的请求,如果和当前过滤器的拦截路径匹配,该方法会被调用
PrintWriter out = response.getWriter();
chain.doFilter(request, response);
out.println("Hello MyFilter01");
}
public void destroy() {
// 过滤器对象在销毁时自动调用,释放资源
}
}
```
MyFilter02.java:
```
@WebFilter(filterName = "MyFilter02", urlPatterns = "/MyServlet")
public class MyFilter02 implements Filter {
public void init(FilterConfig fConfig) throws ServletException {
// 过滤器对象在初始化时调用,可以配置一些初始化参数
}
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
// 用于拦截用户的请求,如果和当前过滤器的拦截路径匹配,该方法会被调用
PrintWriter out = response.getWriter();
out.println("MyFilter02 Before");
chain.doFilter(request, response);
out.println("MyFilter02 After");
}
public void destroy() {
// 过滤器对象在销毁时自动调用,释放资源
}
}
```
MyServlet.java:
```
@WebServlet(name = "MyServlet", urlPatterns = "/MyServlet")
public class MyServlet extends HttpServlet {
public void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.getWriter().println("Hello MyServlet");
}
}
```
这三个类中,`MyFilter01` 和 `MyFilter02` 都是过滤器,作用是拦截 `"/MyServlet"` 路径的请求。`MyServlet` 是一个 Servlet,会在浏览器请求 `"/MyServlet"` 路径时被调用。
当浏览器请求 `"/MyServlet"` 路径时,会依次经过 `MyFilter01` 和 `MyFilter02` 这两个过滤器,然后才会进入 `MyServlet` 的 `service` 方法。在这个过程中,过滤器会先拦截请求并输出一些信息,然后再将请求传递给下一个过滤器或者 Servlet。因此,浏览器最终看到的结果应该是这样的:
```
MyFilter02 Before
Hello MyServlet
MyFilter02 After
Hello MyFilter01
```
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