本文主要是介绍基于REST的web service project添加spring框架,希望对大家解决编程问题提供一定的参考价值,需要的开发者们随着小编来一起学习吧!
最近写项目,要使用spring3+hibernate4开发REST ful的web service project,框架都添加进去以后,使用spring注解方式获得对象实例永远是个NULL,急了一天终于是弄出来了,现做如下总结。
在web.xml中默认的JAX-RSServlet服务所对应的类完整路径是com.sun.jersey.spi.container.servlet.ServletContainer,使用这个的话是自己写的service是不会交给spring的IOC容器管理的,所以需要修改为com.sun.jersey.spi.spring.container.servlet.SpringServlet,这个类呢需要jersey-spring-1.18.jar(jersey-spring-1.18.jar的下载链接:http://download.csdn.net/detail/u011924665/9475934,找了好久没找到啊,最总在别人的工程里找到了,现在单独提取出来,供大家下载。)的支持,同时提供默认的一个参数:com.sun.jersey.config.property.packages,参数的值就是你工程下src中你写JAVA类文件的包名,一般都以com开始,所以我直接写了一个com.如果不提供这个参数,或者说你的工程下src目录下没有一个web service 接口的话,就会报出:The ResourceConfig instance does not contain any root resource classes的错误。同时主意:工程里所有的对象都要交给Spring IOC容器管理,不然还是找不到对象。
我的工程代码和目录粘贴如下:
蓝色箭头的可以看到都已经被spring IOC容器托管了,红色箭头就是需要的jar包。
web.xml 主意红色加粗的地方。
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
<display-name>circle</display-name>
<servlet>
<description>JAX-RS Tools Generated - Do not modify</description>
<servlet-name>JAX-RSServlet</servlet-name>
<servlet-class>com.sun.jersey.spi.spring.container.servlet.SpringServlet</servlet-class>
<init-param>
<param-name>com.sun.jersey.config.property.packages</param-name>
<param-value>com</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>JAX-RSServlet</servlet-name>
<url-pattern>/jaxrs/*</url-pattern>
</servlet-mapping>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
</web-app>
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:p="http://www.springframework.org/schema/p"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xsi:schemaLocation="http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">
<context:component-scan base-package="com" use-default-filters="true"></context:component-scan>
<bean id="dataSource"
class="org.apache.commons.dbcp.BasicDataSource">
<property name="url"
value="jdbc:mysql://127.0.0.1:3306/circle">
</property>
<property name="username" value="root"></property>
<property name="password" value="123456"></property>
</bean>
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource">
<ref bean="dataSource" />
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.current_session_context_class">thread</prop> <!-- 使用getCurrentSession()方法,必须配置此属性 -->
</props>
</property>
<property name="mappingResources">
<list>
<value>com/hibernate/pojo/CirFriends.hbm.xml</value>
<value>com/hibernate/pojo/CirInformation.hbm.xml</value>
<value>com/hibernate/pojo/CirUser.hbm.xml</value>
<value>com/hibernate/pojo/CirRemark.hbm.xml</value></list>
</property></bean>
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<tx:annotation-driven transaction-manager="transactionManager" />
</beans>
test.java 是我的web service 接口,基于rest ful。
package com.service;
import javax.annotation.Resource;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.Produces;
import javax.ws.rs.core.MediaType;
import org.springframework.stereotype.Component;
import com.hibernate.dao.CirFriendsDao;
@Component
@Path("test")
public class test {
@Resource(name="cirFriendsDao")
private CirFriendsDao cirFriendsDao;
@GET
@Path("d")
@Produces(MediaType.APPLICATION_JSON)
public String d(){
System.out.println(cirFriendsDao);
return cirFriendsDao.register();
}
}
cirFriendsDao.java 接口文件,这个就不用交给ioc了。
package com.hibernate.dao;
public interface CirFriendsDao {
String register();
}
cirFriendsDaoImpl.java
package com.hibernate.dao;
import org.springframework.stereotype.Repository;
@Repository(value="cirFriendsDao")
public class CirFriendsDaoImpl extends BaseDao implements CirFriendsDao{
@Override
public String register() {
// TODO Auto-generated method stub
System.out.println(getSession());
return "good boy";
}
}
BaseDao.java
package com.hibernate.dao;
import javax.annotation.Resource;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.springframework.stereotype.Component;
import org.springframework.transaction.annotation.Transactional;
@Component
public class BaseDao {
@Resource(name="sessionFactory")
private SessionFactory sessionFactory;
public SessionFactory getSessionFactory() {
return sessionFactory;
}
public void setSessionFactory(SessionFactory sessionFactory) {
System.out.println("注入 SessionFactory");
this.sessionFactory = sessionFactory;
}
@Transactional
public Session getSession(){
System.out.println("sessionfactory="+sessionFactory);
return sessionFactory.getCurrentSession();
}
}
这篇关于基于REST的web service project添加spring框架的文章就介绍到这儿,希望我们推荐的文章对编程师们有所帮助!