Spring with REST

Question

我正在學習Spring框架。我使用REST + JSON創建了SpringMVC的示例項目。我可以能夠成功編譯，但是當我打的REST URL時，系統提示如下消息

org.springframework.web.servlet.PageNotFound noHandlerFound 警告：未找到HTTP請求與URI的映射[/用SpringMVC /在DispatcherServlet中名爲'springmvc'的[rest/employee]。

下面是用SpringMVC -servlet.xml中

<context:component-scan base-package="com.springmvc.beans" /> 
    <context:annotation-config /> 
    <mvc:annotation-driven /> 
    <bean 
     class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
     <property name="prefix" value="/WEB-INF/pages/"></property> 
     <property name="suffix" value=".jsp"></property> 
    </bean> 

    <bean 
     class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"> 
     <property name="messageConverters"> 
      <list> 
       <ref bean="jsonMessageConverter" /> 
      </list> 
     </property> 
    </bean> 

<!-- Configure bean to convert JSON to POJO and vice versa --> 
<bean id="jsonMessageConverter" 
    class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter"> 
</bean> 

而且web.xml中

<servlet> 
    <servlet-name>springmvc</servlet-name> 
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> 
    <load-on-startup>1</load-on-startup> 
</servlet> 
<servlet-mapping> 
    <servlet-name>springmvc</servlet-name> 
    <url-pattern>/*</url-pattern> 
</servlet-mapping> 

而且EmployeeController.java

package com.springmvc.beans; 

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

import org.springframework.stereotype.Controller; 
import org.springframework.web.bind.annotation.PathVariable; 
import org.springframework.web.bind.annotation.RequestMapping; 
import org.springframework.web.bind.annotation.RequestMethod; 
import org.springframework.web.bind.annotation.ResponseBody; 

@Controller 
public class EmployeeController { 

    public static final String GET_EMPLOYEE = "/rest/employee/{empId}"; 
    public static final String CREATE_EMPLOYEE = "/rest/employee/create/"; 
    public static final String DELETE_EMPLOYEE = "/rest/employee/delete/{empId}"; 
    public static final String GET_ALL_EMPLOYEES = "/rest/employee/"; 

    private Map<String, Employee> employeeData = new HashMap<String, Employee>(); 
    private Integer count = 1; 

    @RequestMapping(method=RequestMethod.GET, value=GET_EMPLOYEE) 
    public @ResponseBody Employee getEmployee(@PathVariable ("empId") String empId){ 
     return employeeData.get(empId); 
    } 

    @RequestMapping(method=RequestMethod.PUT, value=CREATE_EMPLOYEE) 
    public @ResponseBody void createEmployee(){ 
     employeeData.put(String.valueOf(count++), new Employee(String.valueOf(count++), "Batman"+Math.random(), "23"+Math.random(), "Andartica"+Math.random(), "dash2@gmail.com"+Math.random())); 
    } 

    @RequestMapping(method=RequestMethod.PUT, value=DELETE_EMPLOYEE) 
    public @ResponseBody void deleteEmployee(@PathVariable ("empId") String empId){ 
     employeeData.remove(empId); 
    } 

    @RequestMapping(method=RequestMethod.GET, value=GET_ALL_EMPLOYEES) 
    public @ResponseBody Map<String, Employee> getAllEmployees(){ 
     return employeeData; 
    } 


    { 
     employeeData.put(String.valueOf(count), new Employee("1", "Mani", "31", "America", "Dash@gmail.com")); 

    } 
} 

最後Employee.java POJO

package com.springmvc.beans; 

/** 
* @author Mani 
* 
*/ 
public class Employee { 

    private String empId; 
    private String name; 
    private String age; 
    private String address; 
    private String email; 

    public String getEmpId() { 
     return empId; 
    } 
    public void setEmpId(String empId) { 
     this.empId = empId; 
    } 
    public String getName() { 
     return name; 
    } 
    public void setName(String name) { 
     this.name = name; 
    } 
    public String getAge() { 
     return age; 
    } 
    public void setAge(String age) { 
     this.age = age; 
    } 
    public String getAddress() { 
     return address; 
    } 
    public void setAddress(String address) { 
     this.address = address; 
    } 
    public String getEmail() { 
     return email; 
    } 
    public void setEmail(String email) { 
     this.email = email; 
    } 
    public Employee(String empId, String name, String age, String address, String email) { 
     super(); 
     this.empId = empId; 
     this.name = name; 
     this.age = age; 
     this.address = address; 
     this.email = email; 
    } 



} 

注：我的春天的版本是4.1，我已經在我的類路徑下面罐子加入到輸出轉換成JSON消息

<dependencies> 
    <dependency> 
     <groupId>com.fasterxml.jackson.core</groupId> 
     <artifactId>jackson-core</artifactId> 
     <version>2.8.1</version> 
    </dependency> 

    <dependency> 
     <groupId>com.fasterxml.jackson.core</groupId> 
     <artifactId>jackson-databind</artifactId> 
     <version>2.8.1</version> 
    </dependency> 

    <dependency> 
     <groupId>com.fasterxml.jackson.core</groupId> 
     <artifactId>jackson-annotations</artifactId> 
     <version>2.8.1</version> 
    </dependency> 
</dependencies> 

請幫忙解決這個問題。

由於提前 馬尼萬南

Answer 1

看代碼的端點被映射到

public static final String GET_ALL_EMPLOYEES = "/rest/employee/"; 

其中爲被訪問的URL是

/SpringMVC/rest/employee 

org.springframework.web .servlet.PageNotFound noHandlerFound警告：未找到具有URI的HTTP請求的映射[/ SpringMVC/res在名爲'springmvc'的DispatcherServlet中使用[t/employee]。

嘗試進行如下：

GET_ALL_EMPLOYEES = "/rest/employee";