404未找到Spring MVC使用邮递员

Question

我在使用SpringMVC实现RESTfulAPI时遇到了一个问题。

我使用postman来测试这样一种方法：

http://localhost:8080/Test/countryController/getAllCountries

• 测试是项目名称
• 国控器是控制器类的@刚需映射的值
• getAll国家是get方法

然而，我得到了一个错误消息：

源服务器找不到目标资源的当前表示形式，或者不愿意透露存在该表示形式。

我搜索了很多帖子，但仍然无法解决。希望有人能帮助我。

下面是代码。

springservlet。xml

<?xml version="1.0" encoding="UTF-8"?>
<beans:beans xmlns="http://www.springframework.org/schema/mvc"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 xmlns:context="http://www.springframework.org/schema/context"
    xmlns:beans="http://www.springframework.org/schema/beans" 
 xmlns:tx="http://www.springframework.org/schema/tx"
     xsi:schemaLocation="http://www.springframework.org/schema/mvc 
 http://www.springframework.org/schema/mvc/spring-mvc-4.2.xsd
        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-4.2.xsd
         http://www.springframework.org/schema/tx 
 http://www.springframework.org/schema/tx/spring-tx-4.2.xsd">

<annotation-driven />

<resources mapping="/resources/**" location="/resources/" />

<beans:bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
    destroy-method="close">
    <beans:property name="driverClassName" value="com.mysql.jdbc.Driver" />
    <beans:property name="url"
        value="jdbc:mysql://localhost:3306/country" />
    <beans:property name="username" value="root" />
    <beans:property name="password" value="12341234" />
</beans:bean>

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

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

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

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

web.xml

<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
    <display-name>Archetype Created Web Application</display-name>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/spring-servlet.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>/country</url-pattern>
    </servlet-mapping>
</web-app>

国JAVA

package com.system.model;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;

@Entity
@Table(name="country")
public class Country {

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

    @Column(name="countryName")
    String countryName;

    @Column(name="population")
    int population;

    public Country() {
        super();
    }

    public Country(int i, String countryName, int population) {
        super();
        this.id = i;
        this.countryName = countryName;
        this.population = population;
    }

    public int getId() {
        return id;
    }

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

    public String getCountryName() {
        return countryName;
    }

    public void setCountryName(String countryName) {
        this.countryName = countryName;
    }

    public long getPopulation() {
        return population;
    }

    public void setPopulation(int population) {
        this.population = population;
    }
}

国家ontroller.java

@RestController("country")
@RequestMapping(value="/countryController")
public class CountryController {

@Autowired
CountryService countryService;

@RequestMapping(value = "/getAllCountries", method = RequestMethod.GET, headers = "Accept=application/json")
public List<Country> getCountries() {

    List<Country> listOfCountries = countryService.getAllCountries();
    return listOfCountries;
}

@RequestMapping(value = "/getCountry/{id}", method = RequestMethod.GET, headers = "Accept=application/json")
public Country getCountryById(@PathVariable int id) {
    return countryService.getCountry(id);
}

@RequestMapping(value = "/addCountry", method = RequestMethod.POST, headers = "Accept=application/json")
public void addCountry(@RequestBody Country country) {
    countryService.addCountry(country);

}

@RequestMapping(value = "/updateCountry", method = RequestMethod.PUT, headers = "Accept=application/json")
public void updateCountry(@RequestBody Country country) {
    countryService.updateCountry(country);
}

@RequestMapping(value = "/deleteCountry/{id}", method = RequestMethod.DELETE, headers = "Accept=application/json")
public void deleteCountry(@PathVariable("id") int id) {
    countryService.deleteCountry(id);
}

}

谢谢

Answer 1

您的servlet映射设置为 /country所以您应该使用的URL是：

http://localhost:8080/Test/country/countryController/getAllCountries