Question

为什么链接http://localhost:8080/demo00/user/没有用，说404，如何解决？我的网站项目结构： website structure

的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.demo</groupId>
    <artifactId>demo00</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>demo00 Maven Webapp</name>
    <url>http://maven.apache.org</url>

    <properties>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
    </properties>

    <dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>3.8.1</version>
            <scope>test</scope>
        </dependency>

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

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
            <version>1.4.0.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>4.2.6.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>4.2.6.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>4.2.6.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>4.2.6.RELEASE</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>4.2.6.RELEASE</version>
        </dependency>


        <dependency>
            <groupId>commons-dbcp</groupId>
            <artifactId>commons-dbcp</artifactId>
            <version>1.4</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.36</version>
        </dependency>


        <dependency>
            <groupId>org.codehaus.jackson</groupId>
            <artifactId>jackson-mapper-asl</artifactId>
            <version>1.9.10</version>
        </dependency>

        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.3</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-core</artifactId>
            <version>4.1.0.Final</version>
        </dependency>

        <dependency>
            <groupId>org.hibernate.javax.persistence</groupId>
            <artifactId>hibernate-jpa-2.0-api</artifactId>
            <version>1.0.0.Final</version>
        </dependency>

        <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.9.2</version>
        </dependency>

        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.4</version>
        </dependency>
    </dependencies>
    <build>
        <finalName>demo00</finalName>
    </build>
</project>

的web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"
    id="WebApp_ID" version="3.1">
    <display-name>Archetype Created Web Application</display-name>
    <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
    </welcome-file-list>

    <context-param>
        <param-name>ApplicationContext</param-name>
        <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>

    <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>/</url-pattern>
    </servlet-mapping>

</web-app>

弹簧servlet.xml中：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
   xmlns:context="http://www.springframework.org/schema/context"
   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-3.0.xsd
   http://www.springframework.org/schema/context 
   http://www.springframework.org/schema/context/spring-context-3.0.xsd">

   <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
      <property name="prefix" value="/view/" />
      <property name="suffix" value=".html" />
   </bean>

</beans>

的applicationContext.xml：

<?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:tx="http://www.springframework.org/schema/tx"
    xmlns:mvc="http://www.springframework.org/schema/mvc" 
    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/tx
http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">

    <!-- Enable @Autowired -->
    <context:component-scan base-package="com" />
    <context:annotation-config />

    <mvc:annotation-driven /> 

    <mvc:resources mapping="/resources/**" location="/resources/" />
    <mvc:resources mapping="/view/**" location="/view/" />
    <mvc:resources mapping="/img/**" location="/img/" />
    <mvc:resources mapping="/fonts/**" location="/fonts/" />
    <mvc:resources mapping="/css/**" location="/css/" />
    <mvc:resources mapping="/js/**" location="/js/" />

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/demo576" />
        <property name="username" value="root" />
        <property name="password" value="123456" />
    </bean>

    <!-- Session Factory Declaration -->
    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="packagesToScan" value="com.demo.model" />
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.enable_lazy_load_no_trans">true</prop>
                <prop key="hibernate.default_schema">demo576</prop>
                <prop key="format_sql">true</prop>
                <prop key="use_sql_comments">true</prop>
                <!-- <prop key="hibernate.hbm2ddl.auto">create</prop> -->
            </props>
        </property>
    </bean>

    <tx:annotation-driven transaction-manager="transactionManager" />

     <bean id="transactionManager"
        class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

</beans>

user.html：

<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>User</title>
</head>
<body>
    <h1>Hello User!</h1>
</body>
</html>

UserController.java：

package com.demo.controller;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;

import com.demo.model.User;
import com.demo.service.UserService;

@Controller
@RequestMapping("user")
public class UserController {

    @Autowired
    UserService userServices;

    @RequestMapping(value = "/", method = RequestMethod.GET)
    public ModelAndView get() {
        ModelAndView view = new ModelAndView("user");
        return view;
    }

    @RequestMapping(value = "/saveOrUpdate", method = RequestMethod.POST)
    public @ResponseBody Map<String, Object> saveOrUpdate(User user) {
        Map<String, Object> map = new HashMap<String, Object>();

        if (userServices.saveOrUpdate(user)) {
            map.put("status", "200");
            map.put("message", "Your record have been saved successfully");
        }

        return map;
    }

    @RequestMapping(value = "/list", method = RequestMethod.POST)
    public @ResponseBody Map<String, Object> list(User user) {
        Map<String, Object> map = new HashMap<String, Object>();

        List<User> list = userServices.list();

        if (list != null) {
            map.put("status", "200");
            map.put("message", "Data found");
            map.put("data", list);
        } else {
            map.put("status", "404");
            map.put("message", "Data not found");

        }

        return map;
    }

    @RequestMapping(value = "/delete", method = RequestMethod.POST)
    public @ResponseBody Map<String, Object> delete(User user) {
        Map<String, Object> map = new HashMap<String, Object>();

        if (userServices.delete(user)) {
            map.put("status", "200");
            map.put("message", "Your record have been deleted successfully");
        }

        return map;
    }
}

我一步一步地学习了一些教程，但无法弄清楚这里有什么错误。我在Windows 10中使用Eclipse Neon + Tomcat 8 + Java 1.8。请提前帮助，谢谢。

如果有不正确的代码或结构，请同时指出。

修改我根据以下建议更改了一些xml和java文件，并将演示项目上传到https://www.dropbox.com/s/k0rahvz4u29jzey/demo00-160828-url-does-no-work.zip?dl=0，如果可能请检查。感谢。

Answer 1

我建议您对项目结构和.xml文件进行一些更改。

1）您应该在 WEB-INF 文件夹中保留查看文件夹。

2）您可以删除这些映射： -

<mvc:resources mapping="/view/**" location="/view/" />
<mvc:resources mapping="/img/**" location="/img/" />
<mvc:resources mapping="/fonts/**" location="/fonts/" />
<mvc:resources mapping="/css/**" location="/css/" />
<mvc:resources mapping="/js/**" location="/js/" />

3）使用此

property name =“prefix”value =“/ WEB-INF / view /”

而不是

property name =“prefix”value =“/ view /”

Answer 2

您可以将css，js，img和fonts文件夹放在webapps / resources中的一个位置，并在app上下文文件中进行以下输入：

  <mvc:resources mapping="/resources/**" location="/resources/"
    cache-period="31556926" />

您可以删除应用程序上下文文件中的以下行：

<mvc:resources mapping="/view/**" location="/view/" />
<mvc:resources mapping="/img/**" location="/img/" />
<mvc:resources mapping="/fonts/**" location="/fonts/" />
<mvc:resources mapping="/css/**" location="/css/" />
<mvc:resources mapping="/js/**" location="/js/" />

其次，您将视图折叠在WEB-INF中并更改应用程序上下文文件中的条目：

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

最后你可以像这样编写你的控制器来获取默认的get方法：不需要使用value属性，因为您没有在此处提供任何其他URL。

  @RequestMapping( method = RequestMethod.GET)
    public ModelAndView get() {
        ModelAndView view = new ModelAndView("user");
        return view;
    }

然后你可以点击：

  http://localhost:8080/demo00/user

Answer 3

问题是applicationContext.xml未在application bootup时扫描404，最终为applicationContext.xml中定义的所有资源抛出contextConfigLocation。要将上下文加载文件添加为web.xml中<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1"> <display-name>Archetype Created Web Application</display-name> <welcome-file-list> <welcome-file>index.html</welcome-file> <welcome-file>index.htm</welcome-file> <welcome-file>index.jsp</welcome-file> <welcome-file>default.html</welcome-file> <welcome-file>default.htm</welcome-file> <welcome-file>default.jsp</welcome-file> </welcome-file-list> <servlet> <servlet-name>spring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <init-param> <param-name>contextConfigLocation</param-name> <param-value>/WEB-INF/applicationContext.xml, /WEB-INF/spring-servlet.xml</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>的一部分，如下所示：

<强>的web.xml

mvc:resources

接下来，从applicationContext.xml移除<mvc:default-servlet-handler/>并添加Spring 4，当您使用Spring 4时，请将架构位置更新为Spring 3而不是{{1}如下：

<?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:tx="http://www.springframework.org/schema/tx"
    xmlns:mvc="http://www.springframework.org/schema/mvc" 
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
    http://www.springframework.org/schema/tx
    http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context-4.0.xsd
    http://www.springframework.org/schema/mvc
    http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">

    <!-- Enable @Autowired -->
    <context:component-scan base-package="com" />
    <context:annotation-config />

    <mvc:annotation-driven />
    <mvc:default-servlet-handler/>

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver" />
        <property name="url" value="jdbc:mysql://localhost:3306/demo576" />
        <property name="username" value="root" />
        <property name="password" value="123456" />
    </bean>

    <!-- Session Factory Declaration -->
    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="packagesToScan" value="com.demo.model" />
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.enable_lazy_load_no_trans">true</prop>
                <prop key="hibernate.default_schema">demo576</prop>
                <prop key="format_sql">true</prop>
                <prop key="use_sql_comments">true</prop>
                <!-- <prop key="hibernate.hbm2ddl.auto">create</prop> -->
            </props>
        </property>
    </bean>

    <tx:annotation-driven transaction-manager="transactionManager" />

     <bean id="transactionManager"
        class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

</beans>

如果您想了解<mvc:default-servlet-handler />的更多信息，请查看我的回答here。

除了上述更改之外，请在@RequestMapping中提供唯一的UserController.java网址，否则会引发Circular view path例外，我会在班级将@RequestMapping修改为/users以避免同样如下：

@Controller
@RequestMapping("/users")
public class UserController {

@RequestMapping(value = "", method = RequestMethod.GET)
 public ModelAndView get() {
    ModelAndView view = new ModelAndView("user");
    return view;
 }
}

现在，打开http://localhost:8080/demo00/users应显示user.html页面，如下所示：

Spring MVC：找不到其他的html文件

3 个答案: