如何使用自定义错误页面重定向tomcat 9版本中的400错误

问题描述 投票：0回答：1

我尝试使用自定义错误页面重定向 400 错误，但它不起作用。 400 只是不重定向，404 和 500 工作正常

1：

 <error-page>
        <error-code>400</error-code>
        <location>/faces/errors.xhtml</location>
    </error-page>
    
    <error-page>
        <error-code>404</error-code>
        <location>/faces/notfound.xhtml</location>
    </error-page>
    <error-page>
        <error-code>500</error-code>
        <location>/faces/error.xhtml</location>
    </error-page>

2： 在服务器级别更改 --sever.xml 文件也不起作用

 <Host name="localhost"  appBase="webapps"
            unpackWARs="true" autoDeploy="true">

                     <Valve className="org.apache.catalina.valves.ErrorReportValve"
       errorCode.400="/faces/errors.xhtml"
       showReport="false"
       showServerInfo="false" />

3 创建了servlet类来重定向错误，但它也不起作用

package tneb.ccms.consumer;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/error400")
public class Error400Servlet extends HttpServlet {
    private static final long serialVersionUID = 1L;

    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        // Set response content type
        
        //System.out.println( request.getRequestURI());
         response.setContentType("text/html");

        System.out.println("error page");
        // Set response status to 400 Bad Request
        response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
       
        response.sendRedirect(request.getContextPath()+"/faces/errors.xhtml");
       
    }
}

package tneb.ccms.consumer;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.FilterRegistration;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class BadRequestFilter implements Filter {

     private FilterConfig filterConfig;

        @Override
        public void init(FilterConfig filterConfig) throws ServletException {
            this.filterConfig = filterConfig;
        }

        @Override
        public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
                throws IOException, ServletException {
            HttpServletRequest httpRequest = (HttpServletRequest) request;
            HttpServletResponse httpResponse = (HttpServletResponse) response;

            try {
                chain.doFilter(request, response);
            } catch (Exception e) {
                if (httpResponse.getStatus() == HttpServletResponse.SC_BAD_REQUEST) {
                    httpRequest.getRequestDispatcher("/faces/errors.xhtml").forward(request, response);
                } else {
                    throw e;
                }
            }
        }

        @Override
        public void destroy() {
            // Cleanup code if needed
        }
}

我尽了一切努力并参考文档仍然无法解决这个问题

java hibernate mapping xhtml tomcat9
1个回答
0
投票

项目树

hello-tomcat9-web
├── pom.xml
└── src
    └── main
        ├── java
        │   └── com
        │       └── example
        │           └── HelloStatusServlet.java
        └── webapp
            ├── 400.html
            ├── 404.html
            ├── 500.html
            ├── index.jsp
            └── WEB-INF
                └── web.xml

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>com.example</groupId>
    <artifactId>helloweb</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>helloweb</name>
    <properties>
        <maven.compiler.target>1.8</maven.compiler.target>
        <maven.compiler.source>1.8</maven.compiler.source>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    </properties>

    <dependencies>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>javax.servlet.jsp-api</artifactId>
            <version>2.3.3</version>
            <scope>provided</scope>
        </dependency>
    </dependencies>

    <build>
        <finalName>helloworld</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-war-plugin</artifactId>
                <version>3.4.0</version>
                <configuration>
                    <failOnMissingWebXml>false</failOnMissingWebXml>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

web.xml

只需在web.xml中设置相应的网页 - 状态码400、404、500即可。

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" 
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee 
                             http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
         version="3.1">
  <display-name>hello-tomcat9-web</display-name>

    <error-page>
        <error-code>400</error-code>
        <location>/400.html</location>
    </error-page>

    <error-page>
        <error-code>404</error-code>
        <location>/404.html</location>
    </error-page>
    
    <error-page>
        <error-code>500</error-code>
        <location>/500.html</location>
    </error-page>
           
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.jsp</welcome-file>
    <welcome-file>default.htm</welcome-file>
  </welcome-file-list>  
</web-app>

HelloStatusServlet.java

HelloStatusServlet可用于模拟生成并返回400和500状态码。

package com.example;

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@WebServlet("/helloStatus")
public class HelloStatusServlet extends HttpServlet {

    private static final long serialVersionUID = 1L;

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        String errorType = request.getParameter("error");

        if ("400".equals(errorType)) {
            response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Simulated 400 Error");
            return;
        } else if ("500".equals(errorType)) {
            response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR, "Simulated 500 Error");
            return;
        }

        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        out.println("<html><body>");
        out.println("<h1>Hello, World!</h1><p/>");
        out.println("<h1>Status TEST!</h1><p/>");
        out.println("</body></html>");
    }
}

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Hello Page</title>
</head>
<body>
    <h1>Hello</h1>
    <p>Current Date and Time: <%= new java.util.Date() %></p>
</body>
</html>

400.html

<!DOCTYPE html>
<html>
<head>
    <title>Bad Request</title>
</head>
<body>
<h1>400 - Bad Request</h1>
<p>ZZZZZ - The request could not be understood by the server due to malformed syntax.</p>
</body>
</html>

404.html

<!DOCTYPE html>
<html>
<head>
    <title>Page Not Found</title>
</head>
<body>
<h1>404 - Page Not Found</h1>
<p>ZZZZZ - The requested resource could not be found on this server.</p>
</body>
</html>

500.html

<!DOCTYPE html>
<html>
<head>
    <title>Internal Server Error</title>
</head>
<body>
<h1>500 - Internal Server Error</h1>
<p>ZZZZZ - Sorry, something went wrong on our end. Please try again later.</p>
</body>
</html>

套餐

mvn clean package

向 Tomcat 发动战争

将

helloworld.war
放入Tomcat/webapps/

启动Tomcat

测试

  • http://localhost:8080/helloworld/

返回index.jsp

001.png

  • http://localhost:8080/helloworld/helloStatus

返回 helloStatus servlet。

002.png

  • http://localhost:8080/helloworld/helloStatus?error=400

模拟状态代码 400。

003.png

  • http://localhost:8080/helloworld/helloStatus?error=500

模拟状态代码 500。

004.png

  • http://localhost:8080/helloworld/12324344

返回404

005.png

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