我是春天的初学者。
我现在正试图看看我是否可以测试RequestMapping，RequestBody，RequestResponse和RestTemplate。
我希望收到此对象作为回复：
public interface TestObject {
public int getId();
public String getValue();
}
@Component
public class TestObjectImpl {
private int id;
private String value;
public TestObjectImpl(int id, String value){
this.id = id;
this.value = value;
}
public int getId(){
return id;
}
public String getValue(){
return value;
}
}
但是，我得到了：
org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'int' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoMatchingBeanFound(DefaultListableBeanFactory.java:1486) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1104) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1066) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:835) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:189) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1193) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1095) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:513) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:483) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:761) ~[spring-beans-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:866) ~[spring-context-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:542) ~[spring-context-4.3.8.RELEASE.jar:4.3.8.RELEASE]
at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:122) ~[spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:737) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:370) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:314) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.3.RELEASE.jar:1.5.3.RELEASE]
at io.yclub.castr.ads_java.ApplicationServer.main(ApplicationServer.java:12) [main/:na]
所以，它说，
Description:
Parameter 0 of constructor in io.yclub.castr.ads_java.google.adwords.model.TestObjectImpl required a bean of type 'int' that could not be found.
Action:
Consider defining a bean of type 'int' in your configuration.
但是我如何真正为＆＃39; int＆＃39;？
创建bean定义我做了什么？
//编辑
感谢KrishnaKuntala，这只是因为我没有默认的构造函数。
立即解决问题。
答案 0 :(得分：3)
您可以注入简单属性，并可以使用@Value注释和占位符轻松访问属性：
@Component
public class TestObjectImpl {
private int id;
private String value;
@Autowired
public TestObjectImpl(@Value("${prop1}")int id, @Value("${prop2}")String value){
this.id = id;
this.value = value;
}
public int getId(){
return id;
}
public String getValue(){
return value;
}
}
然后你需要将它们添加到applicationContext：
<context:property-placeholder .../>
请注意
如果使用默认构造函数修复它，则需要另一种机制来初始化bean，因此，如果要添加非arg构造函数而不是执行上一个构造函数，则必须知道自己在做什么。
答案 1 :(得分：2)
您不需要仅使用默认的无参数构造函数来创建bean。在你的情况下：
1）如果您正在使用XML配置并且想要使用接受参数的构造函数，则需要使用constructor-arg元素指定它们，如下所示：
<bean id="SomeObject" class="com.package.SomeObject">
<constructor-arg val="someVal"/>
<constructor-arg val="anotherVal"/>
</bean>
2）如果你使用Java配置类，你需要这样的东西：
@Configuration
public class Config {
@Bean
public SomeObject someObject() {
return new SomeObject(1, "default");
}
}
请查看有关constructor injection in spring的有用文章。
答案 2 :(得分：0)
请尝试在TestObjecImpl类中添加默认值（无参数构造函数）。
@Component
public class TestObjectImpl {
private int id;
private String value;
public TestObjectImpl(){
}
public TestObjectImpl(int id, String value){
this.id = id;
this.value = value;
}
public int getId(){
return id;
}
public String getValue(){
return value;
}
}
答案 3 :(得分：0)
我正在使用spring web-flow，并且该类未加载，必须在config servlet xml中声明。