java - 无法在 Spring Controller 中接收对象

Question

这是我的第一个 Spring 示例项目。这是一个非常基本的示例，我尝试使用 Ajax 将名字和姓氏传递给我的程序。但是，它无法访问该 URL。这是我的代码。如果有任何遗漏，请告诉我。

package com.controller;

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

import com.impl.EmployeeImpl;
import com.model.Employee;

@Controller  
public class HelloWorldController { 

/*@Autowired
EmployeeImpl employee;*/

@RequestMapping(value = "/hello", method = RequestMethod.POST)
@ResponseBody
public String saveHosting(@RequestBody Employee employee) 
{
    System.out.println("First name :"+employee.getFirstname());
    System.out.println("Last name :"+employee.getLastname());
    return "hi";
}  
}  

我的 JS 代码

$(文档).ready(函数(){

$('#click').click(function() {

    var data = {}
    data["firstname"] = $('#firstname').val();
    data["lastname"] =$('#lastname').val();
    console.log("Data :"+data);
    $.ajax({
        type: "POST",
        contentType: "application/json",
        url: "/SpringProject/hello/",
        data: JSON.stringify(data),
        dataType: 'json',
        timeout: 600000,
        success: function (data) {
            alert("success");
        },
        error: function (e) {
            alert("fail");
        }
});

});

});

Spring-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: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.controller" />  

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

 <!--    <bean id="employee" class="com.impl.EmployeeImpl">
  <property name="firstname" value="shaik"></property>
    <property name="lastname" value="ali"></property> 
</bean> -->
</beans>  

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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>SpringProject</groupId>
<artifactId>SpringProject</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <jdk.version>1.7</jdk.version>
    <junit.version>4.12</junit.version>
    <spring.version>4.1.5.RELEASE</spring.version>
    <msql.connector.version>5.1.10</msql.connector.version>
    <cxf.version>2.2.3</cxf.version>
    <log4j.version>1.2.17</log4j.version>
    <jackson.version>2.6.3</jackson.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
     <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
       <version>4.1.5.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context-support</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-core</artifactId>
        <version>4.3.6.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>4.2.0.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate.common</groupId>
        <artifactId>hibernate-commons-annotations</artifactId>
        <version>4.0.1.Final</version>
        <classifier>tests</classifier>
    </dependency>
    <dependency>
        <groupId>org.hibernate.javax.persistence</groupId>
        <artifactId>hibernate-jpa-2.0-api</artifactId>
        <version>1.0.1.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-entitymanager</artifactId>
        <version>4.0.1.Final</version>
    </dependency>
    <dependency>
        <groupId>javax.validation</groupId>
        <artifactId>validation-api</artifactId>
        <version>1.0.0.GA</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>${msql.connector.version}</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-simple</artifactId>
        <version>1.7.12</version>
    </dependency>
    <!-- <dependency> <groupId>org.apache.logging.log4j</groupId> <artifactId>log4j-core</artifactId> 
        <version>2.3</version> </dependency> -->
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>${log4j.version}</version>
    </dependency>
    <dependency>
        <groupId>ch.qos.logback</groupId>
        <artifactId>logback-core</artifactId>
        <version>1.1.2</version>
    </dependency>
    <dependency>
        <groupId>org.apache.cxf</groupId>
        <artifactId>cxf-rt-frontend-jaxws</artifactId>
        <version>${cxf.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.cxf</groupId>
        <artifactId>cxf-rt-transports-http</artifactId>
        <version>${cxf.version}</version>
    </dependency>

    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>${junit.version}</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-core</artifactId>
        <version>${jackson.version}</version>
    </dependency>

    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>${jackson.version}</version>
    </dependency>
    <dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>

源代码 maven-编译器-插件 3.1 1.7 1.7 Maven war 插件 2.3 网页内容 错误的

Web.xml

          <?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>SpringProject</display-name>
<welcome-file-list>   
   <welcome-file>index.jsp</welcome-file>
 </welcome-file-list>

 <!-- <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>/WEB-INF/lib/soapservice-servlet.xml</param-value>
</context-param> -->

<!--    <listener>
    <listener-  class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
-->
<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>*.html</url-pattern>
</servlet-mapping>

</web-app>

错误

jquery.min.js:2 POST http://localhost:8080/SpringProject/hello/ 404 (Not Found)

Answer 1

将您的 servlet 映射更新为(在 web.xml 中)

<servlet-mapping>
    <servlet-name>spring</servlet-name>
    <url-pattern>/*</url-pattern>
</servlet-mapping>