过去,我使用 Spring 和 IOC 做了一些简单的 SOAP 服务(application-context.xml,其中我声明我的 Controller 有 2 个不同的 DAO 等,Spring 为我设置了它们)
现在我正在尝试使用 Spring 执行 REST 服务。
我的 Controller 看起来像这样
@RestController
@RequestMapping("/")
public class MyController {
private MyDAO1 myDAO1;
private MyDAO2 myDAO2;
@RequestMapping("/name")
public MyTest getGreeting() {
MyTest tst = new MyTest(1, "Hallo ");
return tst;
}
public void setMyDAO1(MyDAO1 myDAO1) {
this.myDAO1 = myDAO1;
}
public void setMyDAO2(MyDAO2 myDAO2) {
this.myDAO2 = myDAO2;
}
我的rest-servlet.xml包含这个:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<!-- Configure to plugin JSON as request and response in method handler -->
<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>
<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="java:comp/env/jdbc/InformixDB" />
<property name="resourceRef" value="true" />
</bean>
<bean id="myDAO1" class="com.test.dao.MyDAO1">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="myDAO2" class="com.test.dao.MyDAO2">
<property name="dataSource" ref="dataSource" />
</bean>
<bean id="myController" class="com.test.controller.MyController">
<property name="myDAO1" ref="myDAO1" />
<property name="myDAO2" ref="myDAO2" />
</bean>
<context:component-scan base-package="com.test.controller.myController" />
<mvc:annotation-driven />
现在我收到错误
java.lang.IllegalStateException: Ambiguous mapping found. Cannot map 'myController' bean method
public com.test.entity.MyTest com.test.controller.MyController.getGreeting()
to {[//name],methods=[],params=[],headers=[],consumes=[],produces=[],custom=[]}: There is already 'myController' bean method
public com.test.entity.MyTest com.test.controller.MyController.getGreeting() mapped.
当我删除RequestMapping注释时,我可以将其部署在tomcat上,但我不知道如何调用该服务
org.springframework.web.servlet.DispatcherServlet noHandlerFound
WARNING: No mapping found for HTTP request with URI [/MyTestService/getGreeting] in DispatcherServlet with name 'rest'
'rest'是web.xml中的servlet映射
我错过了什么?
最佳答案
您加载 Controller 两次,Spring 尝试映射它两次:
- 它在
rest-servlet.xml
中声明 - 由于
@RestController
,它被发现是一个带注释的 Controller 注释和标签<context:component-scan base-package="de.cat.auftrag.controller" />
在rest-servlet.xml
您应该:
- 删除声明
<bean id="myController" ...
来自rest-servlet.xml
,但您必须自动连接 DAO - 删除
<context:component-scan ...
标记,如果您没有任何其他要扫描的 bean。
关于java - 带 IOC 的 Spring REST 服务?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/27021380/