自动装配不工作@Repository

Question

我想创建一个简单的REST服务，在数据库中存储数据。这是一个从REST控制器到MVC控制器的示例架构，MVC控制器实例化一个实体并尝试通过自动装配的存储库将其存储在数据库中。 正确调用REST服务并回复它的内容;但是，存储实体失败并且自动装载的存储库为空。 有人可以帮忙吗？

我的REST服务：

@RestController 
@RequestMapping("/coord") 
public class CoordService { 

    @RequestMapping(value = "/{name}", method = RequestMethod.GET) 
    public String getMuseo(@PathVariable String name) { 
     String result = "Hello " + name + ", I am saving on the db."; 
     new CoordController().saveCoord(); 

     return result; 
    } 
} 

我的应用程序的业务逻辑（MVC中的控制器）：

@Component 
public class CoordController { 
    @Autowired 
    private CoordRepository coordRepository; 

    public void saveCoord() { 
     System.out.println("Ok controller"); 

     Coord cg = new Coord(); 
     System.out.println("Ok new"); 
     cg.setCoord("xyz"); 
     cg.setId(1L); 

     if (coordRepository == null) { 
      System.out.println("REP NULL!"); 
     } else 
      coordRepository.save(cg); 

     System.out.println("Ok save()"); 
    } 
} 

我的实体：

@Entity 
@Configurable 
public class Coord extends IdentifiableEntity { 

    @NotNull 
    private String coord; 

    public String getCoord() { 
     return this.coord; 
    } 

    public void setCoord(String coord) { 
     this.coord = coord; 
    } 
} 

我的仓库：

@Repository 
public interface CoordRepository extends 
    JpaSpecificationExecutor<Coord>, 
    JpaRepository<Coord, Long> { 
} 

我的applicationContext.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:context="http://www.springframework.org/schema/context" 
xmlns:beans="http://www.springframework.org/schema/beans" xmlns:tx="http://www.springframework.org/schema/tx" 
xmlns:jpa="http://www.springframework.org/schema/data/jpa" 
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.2.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd http://www.springframework.org/schema/data/jpa http://www.springframework.org/schema/data/jpa/spring-jpa.xsd"> 

    <context:property-placeholder location="classpath*:spring/*.properties" /> 
    <context:component-scan base-package="com.lh.clte" /> 


    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" 
    destroy-method="close"> 
     <property name="driverClassName" value="${database.driverClassName}" /> 
     <property name="url" value="${database.url}" /> 
     <property name="username" value="${database.username}" /> 
     <property name="password" value="${database.password}" /> 
     <property name="initialSize" value="3" /> 
     <property name="maxActive" value="10" /> 
    </bean> 

    <tx:annotation-driven mode="proxy" 
    transaction-manager="transactionManager" /> 
    <bean class="org.springframework.orm.jpa.JpaTransactionManager" 
    id="transactionManager"> 
     <property name="entityManagerFactory" ref="entityManagerFactory" /> 
    </bean> 

    <bean 
    class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" 
    id="entityManagerFactory"> 
     <property name="persistenceUnitName" value="persistenceUnit" /> 
     <property name="dataSource" ref="dataSource" /> 
    </bean> 

    <jpa:repositories base-package="com.lh.clte.repository" /> 
</beans> 

我的persistence.xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?> 
<persistence xmlns="http://java.sun.com/xml/ns/persistence" 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd" 
version="2.0"> 
    <persistence-unit name="persistenceUnit" 
    transaction-type="RESOURCE_LOCAL"> 
     <provider>org.hibernate.jpa.HibernatePersistenceProvider</provider> 
     <properties> 
      <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect" /> 
      <property name="hibernate.hbm2ddl.auto" value="update" /> 
      <property name="hibernate.ejb.naming_strategy" value="org.hibernate.cfg.ImprovedNamingStrategy" /> 
      <property name="hibernate.connection.charSet" value="UTF-8" /> 
     </properties> 
    </persistence-unit> 
</persistence> 

Answer 1

你的问题是在这里

new CoordController().saveCoord(); 

您需要将CoordController自动装入您的CoordService。通过使用新的CoordController（），您将创建一个CoordController实例，该实例不是由Spring管理的，因此其字段不是自动装配的。

@RestController 
@RequestMapping("/coord") 
public class CoordService { 

    @Autowired 
    private CoordController coordController; 

    @RequestMapping(value = "/{name}", method = RequestMethod.GET) 
    public String getMuseo(@PathVariable String name) { 
     String result = "Hello " + name + ", I am saving on the db."; 
     coordController.saveCoord(); 

     return result; 
    } 
} 

顺便说一句，你CoordService类应该因为它的控制器（它有@RestController注解！），你的CoordController应该CoordService，因为它包含业务逻辑被命名CoordController。