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验证controller报404

图片描述进行controller层测试时报404错误,请问可能是哪里出现问题。

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2回答

404一般就是访问的路径不存在导致的,可能的地方有以下几处:

  1. spring-web.xml里面的package扫描处或者resolver设置不对,可以参考我的

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    <?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:context="http://www.springframework.org/schema/context"
        xmlns:mvc="http://www.springframework.org/schema/mvc"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context.xsd
        http://www.springframework.org/schema/mvc
        http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd">
        <!-- 配置SpringMVC -->
        <!-- 1.开启SpringMVC注解模式 -->
        <mvc:annotation-driven />
     
        <!-- 2.静态资源默认servlet配置 (1)加入对静态资源的处理:js,gif,png (2)允许使用"/"做整体映射 -->
        <mvc:resources mapping="/resources/**" location="/resources/" />
        <mvc:default-servlet-handler />
     
        <!-- 3.定义视图解析器 -->
        <bean id="viewResolver"
            class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix" value="/WEB-INF/html/"></property>
            <property name="suffix" value=".html"></property>
        </bean>
        <!-- 文件上传解析器 -->
        <bean id="multipartResolver"
            class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
            <property name="defaultEncoding" value="utf-8"></property>
            <!-- 1024 * 1024 * 20 = 20M -->
            <property name="maxUploadSize" value="20971520"></property>
            <property name="maxInMemorySize" value="20971520"></property>
        </bean>
     
        <!-- 4.扫描web相关的bean -->
        <context:component-scan base-package="com.imooc.o2o.web" />
    </beans>
  3. controller java代码里的路径没有设置或者访问的路径不对,或者缺少@Controller等标签

  4. 如果是idea,去掉shoolMall访问试试

修改完成后,记得clean tomcat 重启一下,看看ide控制台有没有报错

1 回复 有任何疑惑可以回复我~
  • 提问者 白石溪 #1
    谢谢老师这么晚还回答,我用的是idea去掉shoolMall后可以成功访问了,不过当我在spring-web.xml中加入<!-- 文件上传解析器 -->
        <bean id="multipartResolver"
            class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
            <property name="defaultEncoding" value="utf-8"></property>
            <!-- 1024 * 1024 * 20 = 20M -->
            <property name="maxUploadSize" value="20971520"></property>
            <property name="maxInMemorySize" value="20971520"></property>
        </bean>这一段后会报无法创建bean的异常,是因为还没有做后续相对应的配置吗
    回复 有任何疑惑可以回复我~ 2019-03-19 09:33:43
  • 翔仔 回复 提问者 白石溪 #2
    还需要引入相关的jar:)可以参考我的
    回复 有任何疑惑可以回复我~ 2019-03-20 00:54:54
  • 为什么IDEA 需要去掉schoolMall呢
    回复 有任何疑惑可以回复我~ 2019-03-21 21:57:17
翔仔 2019-03-20 00:55:13
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<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.imooc</groupId>
    <artifactId>myo2o</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>myo2o Maven Webapp</name>
    <url>http://maven.apache.org</url>
    <properties>
        <spring.version>4.3.7.RELEASE</spring.version>
    </properties>
    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <!-- https://mvnrepository.com/artifact/ch.qos.logback/logback-classic -->
        <dependency>
            <groupId>ch.qos.logback</groupId>
            <artifactId>logback-classic</artifactId>
            <version>1.2.3</version>
        </dependency>
        <!-- Spring -->
        <!-- 1)包含Spring 框架基本的核心工具类。Spring 其它组件要都要使用到这个包里的类,是其它组件的基本核心 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- 2)这个jar 文件是所有应用都要用到的,它包含访问配置文件、创建和管理bean 以及进行Inversion of Control 
            / Dependency Injection(IoC/DI)操作相关的所有类。如果应用只需基本的IoC/DI 支持,引入spring-core.jar 
            及spring-beans.jar 文件就可以了。 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- 3)这个jar 文件为Spring 核心提供了大量扩展。可以找到使用Spring ApplicationContext特性时所需的全部类,JDNI 
            所需的全部类,instrumentation组件以及校验Validation 方面的相关类。 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- 4) 这个jar 文件包含对Spring 对JDBC 数据访问进行封装的所有类。 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- 5) 为JDBC、Hibernate、JDO、JPA等提供的一致的声明式和编程式事务管理。 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- 6)Spring web 包含Web应用开发时,用到Spring框架时所需的核心类,包括自动载入WebApplicationContext特性的类、Struts与JSF集成类、文件上传的支持类、Filter类和大量工具辅助类。 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- 7)包含SpringMVC框架相关的所有类。 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <!-- 8)Spring test 对JUNIT等测试框架的简单封装 -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${spring.version}</version>
            <scope>test</scope>
        </dependency>
        <!-- Servlet web -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
        </dependency>
        <!-- json解析 -->
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.8.7</version>
        </dependency>
        <!-- Map工具类 对标准java Collection的扩展 spring-core.jar需commons-collections.jar -->
        <dependency>
            <groupId>commons-collections</groupId>
            <artifactId>commons-collections</artifactId>
            <version>3.2</version>
        </dependency>
        <!-- DAO: MyBatis -->
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.4.2</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.1</version>
        </dependency>
        <!-- 数据库 -->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.37</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
        </dependency>
        <!-- 图片处理 -->
        <!-- https://mvnrepository.com/artifact/net.coobird/thumbnailator -->
        <dependency>
            <groupId>net.coobird</groupId>
            <artifactId>thumbnailator</artifactId>
            <version>0.4.8</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.github.penggle/kaptcha -->
        <dependency>
            <groupId>com.github.penggle</groupId>
            <artifactId>kaptcha</artifactId>
            <version>2.3.2</version>
        </dependency>
        <dependency>
            <groupId>commons-fileupload</groupId>
            <artifactId>commons-fileupload</artifactId>
            <version>1.3.2</version>
        </dependency>
        <!-- redis客户端:Jedis -->
        <dependency>
            <groupId>redis.clients</groupId>
            <artifactId>jedis</artifactId>
            <version>2.9.0</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>o2o</finalName>
        <plugins>
            <plugin>
                <!-- https://mvnrepository.com/artifact/org.apache.maven.plugins/maven-compiler-plugin -->
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.6.1</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <encoding>UTF8</encoding>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>


0 回复 有任何疑惑可以回复我~
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