Question

代码显示404错误 - 找不到请求的资源。我已多次浏览代码，但我没有发现任何线索。那我怎么解决呢？请帮忙。

的login.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>

<%@ taglib prefix="c" uri="http://java.sun.com/jstl/core_rt"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>

<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>

    <form:form action="inslogin" method="get" modelAttribute="log">
        <form:hidden path="id"/>
        <table>
            <tr>
                <td>First name:</td>
                <td><form:input path="fname"/></td>
            </tr>
            <tr>      
                <td>Last name:</td>
                <td><form:input path="lname" /></td>
            </tr>
            <tr>
                <td><input type="submit" value="insert"></td>
            </tr>
        </table>
    </form:form>


</body>
</html>

logincontroller.java

package com.dipen.controller;

import org.springframework.beans.factory.annotation.Autowired;

import java.util.ArrayList;
import java.util.List;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;

import com.dipen.dao.logindao;
import com.dipen.vo.loginvo;

@Controller
public class logincontroller {
    @Autowired
    logindao logind;
    @Autowired
    loginvo loginv;

    @RequestMapping("/")
    public ModelAndView home(){
        return new ModelAndView("login","log",new loginvo());
    }

    @RequestMapping(value="/inslogin", method = RequestMethod.GET)
    public ModelAndView insertname(@ModelAttribute loginvo loginv){

        System.out.println("start of insertname method");
        int i = loginv.getId();
        if(i==0){
            logind.insertlogin(loginv);
            System.out.println("if part");

        }
        else{
            logind.updatelogin(loginv);
            System.out.println("else part");

        }
        System.out.println("end of insertname method");
        ModelAndView mv1=new ModelAndView("welcome");//file name
        return  mv1;

    }


    @RequestMapping(value="/search", method = RequestMethod.GET)
    public ModelAndView search(@ModelAttribute loginvo loginv){
        System.out.println("start of search method");

        List ls = logind.searchdata(loginv);
        System.out.println("done");
        ModelAndView mv=new ModelAndView("search");
        mv.addObject("abc",ls);
        System.out.println("sss"+ls.size());
        System.out.println("end of search method");
        return mv;

    }

    @RequestMapping(value="/delete.html", method = RequestMethod.GET)
    public ModelAndView delete(@ModelAttribute loginvo loginv,@RequestParam int id){
        loginv.setId(id);
        logind.delete(loginv);
        ModelAndView mv1=new ModelAndView("redirect:/search");
        return mv1;
    }

    @RequestMapping(value="/login.html", method = RequestMethod.GET)
    public ModelAndView update(@ModelAttribute loginvo loginv,@RequestParam int id){


        System.out.println("start of update method");

        ModelAndView mv1 = new ModelAndView("login");

        loginvo r = this.logind.getRowById(id);
        System.out.println("update controller : "+r.getFname());
        mv1.addObject("log",this.logind.getRowById(id));
        return mv1;

        /*List ls = new ArrayList();
        loginv.setId(id);
        ls = logind.searchdatabyid(loginv);*/
        /*System.out.println(ls.size());*/  

    }
}

logindao.java

package com.dipen.dao;

import java.util.List;
import java.util.ArrayList;

import org.hibernate.Query;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.omg.PortableInterceptor.SYSTEM_EXCEPTION;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional;

import com.dipen.vo.loginvo;

@Repository
@Transactional
public class logindao {
    @Autowired
    SessionFactory sessionFactory;

    public String insertlogin(loginvo loginv) {
        try {
            Session session = this.sessionFactory.openSession();
            Transaction tr = session.beginTransaction();
            session.save(loginv);
            tr.commit();
            session.close();
            System.out.println("dao inserlogin");
        } catch (Exception e) {
            System.out.println(e.getCause());
        }
        return "Record Inserted...";
    }

    public List searchdata(loginvo loginv) {
        List ls = new ArrayList();
        try {
            Session session = sessionFactory.getCurrentSession();
            Query q = session.createQuery("from loginvo");
            ls = q.list();

            System.out.println("dao searchdata");
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ls;
    }
/*  public List searchdatabyid(loginvo loginv) {
        List ls = new ArrayList();
        try {
            Session session = sessionFactory.getCurrentSession();
            Query q = session.createQuery("from loginvo where id='"+loginv.getId()+"'");
            ls = q.list();

            System.out.println("dao searchdatabyid");
        } catch (Exception e) {
            e.printStackTrace();
        }
        return ls;
    }
*/
    public loginvo getRowById(int id){
        Session session = sessionFactory.getCurrentSession();
        loginvo lv = (loginvo)session.load(loginvo.class,id);
        System.out.println("ID :"+lv.getId());
        System.out.println("Fname :"+lv.getFname());
        return lv;
    }




    public void delete(loginvo loginv) {

        try {
            Session session = sessionFactory.openSession();
            /* Session session = sessionFactory.getCurrentSession(); */
            /* Transaction tr=session.beginTransaction(); */
            Query q = session.createQuery("delete loginvo where id='"+loginv.getId()+ "'");
            q.executeUpdate();
            /* tr.commit(); */
            session.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public String updatelogin(loginvo loginv) {
        try {
            System.out.println("inside updatelogin");

            Session session = this.sessionFactory.openSession();
            Transaction tr = session.beginTransaction();
            session.update(loginv);
            tr.commit();
            session.close();

            System.out.println("dao updatelogin");
        } catch (Exception e) {
            System.out.println(e.getCause());
        }
        return "Record Updated...";
    }

}

loginvo.java

package com.dipen.vo;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;    
import javax.persistence.Id;

@Entity
public class loginvo {

    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    @Column(name="id")
    private int id;

    @Column(name="fname")
    private String fname;

    @Column(name="lname")
    private String lname;

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getFname() {
        return fname;
    }

    public void setFname(String fname) {
        this.fname = fname;
    }

    public String getLname() {
        return lname;
    }

    public void setLname(String lname) {
        this.lname = lname;
    }
}

的welcome.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>

<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>

    <h1>Did it !!!</h1>

    <form:form action="search" method="get" modelAttribute="searchall">
        <input type="submit" value="search">
    </form:form>

</body>
</html>

search.jsp的

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>


    <table border="1px">
        <tr>
            <td>Id</td>
            <td>Firstname</td>
            <td>Lastname</td>
            <td>Update</td>
            <td>Delete</td>
        </tr>
        <c:forEach items="${abc}" var="j">
            <tr>
                <td>${j.id}</td>
                <td>${j.fname}</td>
                <td>${j.lname}</td>
                <td>
                    <a href="login.html?id=${j.id}">Update</a>
                </td>
                <td>
                    <a href="delete.html?id=${j.id}">delete</a>
                </td>
            </tr>

        </c:forEach>
    </table>


</body>
</html>

的web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">

<display-name>Spring_insert</display-name>
<!-- <welcome-file-list>
    <welcome-file>home.jsp</welcome-file>
</welcome-file-list> -->
 <listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<!-- Processes application requests -->
    <servlet>
        <servlet-name>DispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/applicationContext.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>

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

<!-- <listener>
    <listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>-->

</web-app>

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

    <mvc:annotation-driven />


    <mvc:resources mapping="/resources/**" location="/resources/" />
    <bean
        class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/" />
        <property name="suffix" value=".jsp" />
    </bean>

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

    <bean id="dataSource" class="org.apache.commons.dbcp2.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>

    <bean id="sessionFactory"
        class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="annotatedClasses">
            <list>
                <value>com.dipen.vo.loginvo</value>
            </list>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                <prop key="hibernate.show_sql">true</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
            </props>
        </property>
    </bean>

    <!-- Handles HTTP GET requests for /resources/** by efficiently serving 
        up static resources in the ${webappRoot}/resources directory -->

    <!-- Resolves views selected for rendering by @Controllers to .jsp resources 
        in the /WEB-INF/views directory -->

    <tx:annotation-driven />
    <bean id="transactionManager"
        class="org.springframework.orm.hibernate4.HibernateTransactionManager">
        <property name="sessionFactory" ref="sessionFactory" />
    </bean>

    <bean id="logindao" class="com.dipen.dao.logindao">
    </bean>

    <bean id="loginvo" name="Student" class="com.dipen.vo.loginvo">
    </bean>

</beans>

Answer 1

jsp下有WEB-INF个文件，但您的prefix似乎不正确。用

更改它

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

spring MVC中的404错误 - 找不到请求的资源

1 个答案: