Question

我是Spring的新手。我遇到了一个问题，虽然我已经在不同的网站上查看了这个问题并且跟随了这个主题的问题，但我仍然无法找到解决方案。

我收到此错误

在名为'spring'的DispatcherServlet中找不到带有URI [/ ReadingsMVC /]的HTTP请求的映射

我的web.xml是 -

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    id="WebApp_ID" version="2.5">
    <display-name>Spring3MVC</display-name>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>

    <servlet>
        <servlet-name>spring</servlet-name>
        <servlet-class>
            org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>spring</servlet-name>
       <url-pattern>*.do</url-pattern>
    </servlet-mapping>
</web-app>

我的Spring-Servlet是 -

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:p="http://www.springframework.org/schema/p"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-3.0.xsd">

    <context:component-scan
        base-package="com.abc.reading.controller"/>

    <bean id="viewResolver"
        class="/WEB-INF/jsp/.*jsp">
        <property name="viewClass"
            value="org.springframework.web.servlet.view.JstlView" />
        <property name="prefix" value="/WEB-INF/jsp/" />
        <property name="suffix" value=".jsp" />
      </bean>
   </beans>

我的Java Rest Controller代码是

package com.lucidtechsol.reading.controller;

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.abc.reading.exception.InvalidRangeException;
import com.abc.reading.exception.NegativeNumberException;
import com.abc.reading.utilities.RandomNumberGenerator;

@RestController
public class ReadingController {

    @RequestMapping("/reading")
    public String getReading() throws NegativeNumberException, InvalidRangeException {

       return  new Integer(new RandomNumberGenerator().generateRandomNumber(100, -50)).toString();

        }
}

我的TestRandomNumberGenerator是

package com.abc.testcase;



import static org.junit.Assert.*;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

import com.abc.reading.exception.InvalidRangeException;
import com.abc.reading.exception.NegativeNumberException;
import com.abc.reading.utilities.RandomNumberGenerator;

public class TestRandomNumberGenerator {
    int upper;
    int lower;
    RandomNumberGenerator generator;

    /**
     * @throws java.lang.Exception
     */
    @Before
    public void setUp() throws Exception {
        generator = new RandomNumberGenerator();
    }

    /**
     * @throws java.lang.Exception
     */
    @After
    public void tearDown() throws Exception {
        generator = null;
    }

    @Test
    public void testPositive() {
        upper = 10;
        lower = 5;
        try {
            assertTrue(upper >= generator.generateRandomNumber(lower, upper));
        } catch (NegativeNumberException | InvalidRangeException e) {
            e.printStackTrace();
        }
    }

    @Test(expected = NegativeNumberException.class)
    public void testNegativeNumberException() throws NegativeNumberException,
            InvalidRangeException {
        upper = 10;
        lower = -5;
        generator.generateRandomNumber(lower, upper);
    }
    @Test(expected = InvalidRangeException.class)
    public void testInvalidRangeException() throws NegativeNumberException,
            InvalidRangeException {
        upper = 30;
        lower = 10;
        generator.generateRandomNumber(lower, upper);
    }
}

我的异常java文件是 -

InvalidException

/**
 * 
 */
package com.abc.reading.exception;

/**
 * @author kuppusamys
 *
 */
public class InvalidRangeException extends Exception {
    /**
     * 
     */
    private static final long serialVersionUID = 4348179544370409821L;

    public InvalidRangeException() {
        super();
    }

    public InvalidRangeException(String message) {
        super(message);
    }
}

NegativeException

/**
 * 
 */
package com.abv.reading.exception;

/**
 * @author kuppusamys
 *
 */
public class NegativeNumberException extends Exception {
    /**
     * 
     */
    private static final long serialVersionUID = -7903564384519771246L;

    public NegativeNumberException() {
        super();
    }

    public NegativeNumberException(String message) {
        super(message);
    }
}

RandomNumberGenerator是

import java.util.Random;

import com.abc.reading.exception.InvalidRangeException;
import com.abc.reading.exception.NegativeNumberException;

public class RandomNumberGenerator {
    public int generateRandomNumber(int upper, int lower) throws NegativeNumberException, InvalidRangeException {
        if (lower < 0) {
            throw new NegativeNumberException(
                    "Lower bound of range is negative -->" + lower);
        }
        if (upper < 0) {
            throw new NegativeNumberException(
                    "Upper bound of range is negative -->" + upper);
        }
        if (upper < lower) {
            throw new InvalidRangeException("Upper bound of range -->" + upper
                    + " is smaller than lower bound of range -->" + lower);
        }

        return lower + new Random().nextInt(upper - lower);
    }
}

我的.jsp文件是 - Hello

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>spring mvc</title>
</head>
<body>
${message}
</body>
</html>

我不明白我做错了什么。请帮帮我！

如果您不理解，请发表评论

Answer 1

尝试使用http://localhost:8080/reading

的web.xml

<web-app id="WebApp_ID" version="2.4"
    xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
    http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">

    <display-name>Spring Web MVC Application</display-name>

    <servlet>
        <servlet-name>mvc-dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
        <servlet-name>mvc-dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>

</web-app>

MVC-调度-servlet.xml中

<beans xmlns="http://www.springframework.org/schema/beans"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xsi:schemaLocation="http://www.springframework.org/schema/beans
     http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

     <bean class="com.abc.reading.controller.ReadingController" />

     <bean id="viewResolver"
                  class="org.springframework.web.servlet.view.InternalResourceViewResolver">
       <property name="prefix">
            <value>/WEB-INF/pages/</value>
       </property>
       <property name="suffix">
            <value>.jsp</value>
       </property>
     </bean>

</beans>

在Spring中没有找到带URI的HTTP请求的映射？

1 个答案: