Question

我认为servlet中的某个地方存在错误。从索引链接到用户时会导致404错误。如果你发现它，请告诉我。

项目结构 -

web.xml -

<?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>SQL Manager</display-name>
<servlet>
    <servlet-name>dispatcher</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>dispatcher</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>

dispatcher-servlet.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:context="http://www.springframework.org/schema/context"
   xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:tx="http://www.springframework.org/schema/tx"
   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.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">


<context:component-scan base-package="com.dubinets.app"/>

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

<!-- Database Information -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
      destroy-method="close">
    <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
    <property name="url" value="jdbc:mysql://localhost:3306/test"/>
    <property name="username" value="root"/>
    <property name="password" value="root"/>
</bean>

<!-- Hibernate 4 SessionFactory Bean definition -->
<bean id="hibernate4AnnotatedSessionFactory"
      class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="annotatedClasses">
        <list>
            <value>com.dubinets.app.model.User</value>
        </list>
    </property>
    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect
            </prop>
            <prop key="hibernate.show_sql">true</prop>
        </props>
    </property>
</bean>

<!--UserDao and UserService beans-->
<bean id="userDao" class="com.dubinets.app.dao.UserDaoImpl">
    <property name="sessionFactory" ref="hibernate4AnnotatedSessionFactory"/>
</bean>

<bean id="userService" class="com.dubinets.app.service.UserServiceImpl">
    <property name="userDao" ref="userDao"/>
</bean>

<context:component-scan base-package="com.dubinets.app"/>

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

<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
    <property name="sessionFactory" ref="hibernate4AnnotatedSessionFactory"/>
</bean>

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

index.jsp -

<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
    <head>
        <title>SQl Manager</title>
    </head>
    <body>
        <a href="<c:url value="/users"/>" target="_blank">Users list</a>
    </body>
</html>

users.jsp -

<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://www.springframework.org/tags" prefix="spring" %>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>
<%@ taglib prefix="from" uri="http://www.springframework.org/tags/form" %>
<%@ page session="false" %>
<html>
<head>
    <title>Users Page</title>

</head>
<body>
<a href="../../index.jsp">Back to main menu</a>
<br/>
<br/>

<h1>User List</h1>

</body>
</html>

UserController.java -

import com.dubinets.app.model.User;
import com.dubinets.app.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

public class UserController {
    private UserService userService;

    @Autowired(required = true)
    @Qualifier(value = "userService")
    public void setUserService(UserService userService) {
        this.userService = userService;
    }

    @RequestMapping(value = "users", method = RequestMethod.GET)
    public String listUsers(Model model){
        model.addAttribute("user", new User());
        model.addAttribute("listUsers", this.userService.listUsers());

        return "users";
    }

    @RequestMapping(value = "/users/add", method = RequestMethod.POST)
    public String addUser(@ModelAttribute("user") User user){
        if(user.getId() == 0){
            this.userService.addUser(user);
        }else {
            this.userService.updateUser(user);
        }

        return "redirect:/users";
    }

    @RequestMapping("/remove/{id}")
    public String removeUser(@PathVariable("id") int id){
        this.userService.removeUser(id);

        return "redirect:/users";
    }

    @RequestMapping("edit/{id}")
    public String editUser(@PathVariable("id") int id, Model model){
        model.addAttribute("user", this.userService.getUserById(id));
        model.addAttribute("listUsers", this.userService.listUsers());

        return "users";
    }

    @RequestMapping("userdata/{id}")
    public String userData(@PathVariable("id") int id, Model model){
        model.addAttribute("user", this.userService.getUserById(id));

        return "userdata";
    }
}

的index.jsp

点击用户列表（users.jsp）

请求的资源不可用。 404

0 个答案: