Spring+Servlet整合(如何向Servlet注入屬性(轉),servlet獲取spring容器中的bean)

1.Spring數據庫的配置

<?
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:aop

="http://www.springframework.org/schema/aop"
    xsi:schemaLocation

="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
"

>

    <
bean


id

="sessionFactory"
        class

="org.springframework.orm.hibernate3.LocalSessionFactoryBean"
        scope

="singleton"

>
        <
property


name

="dataSource"

ref

="dataSource"

/>
        <
property


name

="hibernateProperties"

>
            <
props
>
                <
prop


key

="hibernate.dialect"

>
                     org.hibernate.dialect.SQLServerDialect
                </
prop
>
                <
prop


key

="hibernate.show_sql"

>


true</
prop
>

                <
prop


key

="jdbc.use_scrollable_resultset"

>


true</
prop
>
                <
prop


key

="hbm2ddl"

>


true</
prop
>
            </
props
>
        </
property
>
        <
property


name

="mappingResources"

>
            <
list
>
                <
value
>


abu/csdn/bean/User.hbm.xml</
value
>
            </
list
>
        </
property
>
    </
bean
>


    <
bean


id

="hibernateTemplate"

class

="org.springframework.orm.hibernate3.HibernateTemplate"

scope

="singleton"

>
        <
property


name

="sessionFactory"

ref

="sessionFactory"

/>
    </
bean
>

    <
bean


id

="dataSource"
        class

="org.apache.commons.dbcp.BasicDataSource"

scope

="singleton"

>
        <
property


name

="driverClassName"
            value

="com.microsoft.sqlserver.jdbc.SQLServerDriver"

>
        </
property
>
        <
property


name

="url"
            value

="jdbc:sqlserver://localhost:1433;databaseName=csu"

>
        </
property
>
        <
property


name

="username"

value

="liky"

/>
        <
property


name

="password"

value

="redhat"

/>
    </
bean
>

    <
bean


id

="transactionManager"
        class

="org.springframework.orm.hibernate3.HibernateTransactionManager"

>
        <
property


name

="sessionFactory"

ref

="sessionFactory"

/>
    </
bean
>

    <
tx:advice


id

="txAdvice"

transaction-manager

="transactionManager"

>
        <
tx:attributes
>

            <
tx:method


name

="save*"

propagation

="REQUIRED"

/>
            <
tx:method


name

="delete*"

propagation

="REQUIRED"

/>
            <
tx:method


name

="update*"

propagation

="REQUIRED"

/>
            <
tx:method


name

="find*"

read-only

="true"

/>
        </
tx:attributes
>
    </
tx:advice
>

    <
aop:config
>

        <
aop:advisor


pointcut-ref

="allServiceMethods"
            advice-ref

="txAdvice"

/>
    </
aop:config
>

</
beans
>

2.Servlet

package


abu.csdn.servlet;
import


java.io.IOException;
import


javax.servlet.ServletContext;
import


javax.servlet.ServletException;
import


javax.servlet.http.HttpServlet;
import


javax.servlet.http.HttpServletRequest;
import


javax.servlet.http.HttpServletResponse;
import


org.springframework.orm.hibernate3.HibernateTemplate;
import


org.springframework.web.context.WebApplicationContext;
import


org.springframework.web.context.support.WebApplicationContextUtils;
/**
*
*
演示使用Spring向Servlet注入對象
*
* User: Abu Date:
2009-7-2 Time: 14:30:55
*/
public


class


CopyOfShowImageServlet extends


HttpServlet {
     HibernateTemplate hibernateTemplate;


    /**
      *
      *
在Servlet中注入對象的步驟:
      * 1.取得ServletContext
      *
2.利用Spring的工具類WebApplicationContextUtils得到WebApplicationContext
      *
3.WebApplicationContext就是一個BeanFactory,其中就有一個getBean方法
      *
4.有了這個方法就可像平常一樣爲所欲爲了,哈哈!
      *
     
*/
    @Override
    public


void


init() throws


ServletException {
        super


.init();

         ServletContext servletContext = this


.getServletContext();

         WebApplicationContext ctx =
WebApplicationContextUtils.getWebApplicationContext(servletContext);

         hibernateTemplate =
(HibernateTemplate)ctx.getBean("hibernateTemplate"

);
     }
    @Override
    protected


void


doPost(HttpServletRequest request,
             HttpServletResponse response) throws


ServletException, IOException {
         doGet(request, response);
     }


    @Override
    protected


void


doGet(HttpServletRequest request,
             HttpServletResponse response) throws


ServletException, IOException {

     }
}

3.總結

你應該看到了,我在Spring中使用了聲明式事務,如果直接使用Spring的工廠類在這裏是不行的,因爲所有的對象都已經有Spring的IoC管理了,所以只能藉助WebApplicationContextUtils這個工具類來獲得Bean.