我在概念测试中使用mybatis-spring。当我运行测试时,所有人都在使用我的数据库,但是在服务中使用代码时,我得到一个java.lang.NullPointerException
我的DaoTest:
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations="/spring-config.xml")
public class DaoTest {
@Autowired
private IOrdenMgmtDao ordenDao;
@Test
public void testDAO(){
Assert.assertNotNull(ordenDao);
Integer countForOrden = ordenDao.getCountByState("NEW");
Assert.assertEquals(new Integer(3), countForOrden);
List<OrdenDetailStateResult> ordenDetail = ordenDao.getOrderDetail("NEW");
Assert.assertNotNull(ordenDetail);
for (OrdenDetailStateResult ordenDetailStateResult : ordenDetail) {
System.out.println(ordenDetailStateResult.getOrden_id() + " "
+ ordenDetailStateResult.getComprador_email() + " "
+ ordenDetailStateResult.getStatus());
}
}
}
测试结果还可以:
...
13:48:29.027 [main] DEBUG o.a.p.b.i.I.getOrderDetail - <== Total: 3
5835561 [email protected] NEW
5835562 [email protected] NEW
5835761 [email protected] NEW
...
但是,当我尝试使用
http://localhost:8080/batisrest/webapi/orders/NEW
休息服务时,我得到:java.lang.NullPointerException org.agonzalez.batisrest.service.OrderService.getCountByState(OrderService.java:22)
我通过OrderResource类访问它:
@Path("/orders")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public class OrderResource {
@Autowired
private OrderService orderService;
@GET
@Path("/{orderStatus}")
public String getOrdersByStatus(@PathParam("orderStatus") String orderStatus){
return Integer.toString(orderService.getCountByState(orderStatus));
}
}
我的OrderService类:
@ContextConfiguration(locations="/spring-config.xml")
public class OrderService {
@Autowired
private IOrdenMgmtDao ordenDao;
public int getCountByState(String orderStatus){
Integer countForOrden = ordenDao.getCountByState(orderStatus);
return countForOrden;
}
}
与mybatis相关的IOrdenMgmtDao:
public interface IOrdenMgmtDao {
public Integer getCountByState(
@Param("ordenStatus") final String ordenStatus);
}
我认为主要问题是来自配置,但我看不到它。有我的spring-config.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:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mybatis-spring="http://mybatis.org/schema/mybatis-spring"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://mybatis.org/schema/mybatis-spring
http://mybatis.org/schema/mybatis-spring-1.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.1.xsd">
<mybatis-spring:scan base-package="org.agonzalez.batisrest.**" />
<bean id="dataSource" class="com.zaxxer.hikari.HikariDataSource">
//[Database configuration working]
</bean>
<bean id="sqlSessionFactoryBean" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="configLocation" value="classpath:mybatis-config.xml"></property>
</bean>
</beans>
还有我的web.xml文件:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath:spring-config.xml
</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
<servlet-name>Jersey Web Application</servlet-name>
<servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class>
<init-param>
<param-name>jersey.config.server.provider.packages</param-name>
<param-value>org.agonzalez</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>Jersey Web Application</servlet-name>
<url-pattern>/webapi/*</url-pattern>
</servlet-mapping>
</web-app>
我的pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.agonzalez</groupId>
<artifactId>batisrest</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<name>batisrest</name>
<url>http://maven.apache.org</url>
<build>
<finalName>batisrest</finalName>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.5.1</version>
<inherited>true</inherited>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
</plugins>
</build>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.glassfish.jersey</groupId>
<artifactId>jersey-bom</artifactId>
<version>${jersey.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<properties>
<jersey.version>2.21</jersey.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.1.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.1.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.1.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.2.2</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.8</version>
</dependency>
<dependency>
<groupId>com.zaxxer</groupId>
<artifactId>HikariCP</artifactId>
<version>1.4.0</version>
</dependency>
<dependency>
<groupId>org.postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.3-1102-jdbc41</version>
</dependency>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.1.2</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>jcl-over-slf4j</artifactId>
<version>1.7.7</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet-core</artifactId>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-moxy</artifactId>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.12</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.1.2.RELEASE</version>
</dependency>
</dependencies>
</project>
如我所说,测试正在与我的数据库连接。
最佳答案
您需要在OrderResource类中自动连接orderService。
更改
OrderService orderService = new OrderService();
至:
@Autowired
private OrderService orderService;
避免在Spring应用程序中使用
new
运算符创建对象。由于您是使用new运算符创建oderService的,因此不会具有dao对象所需的依赖关系。