seam框架CRUD

首先，配置数据源context.xml 将这个文件放在<catalina_home>的conf目录下，我用的是tomcat6

context.xml  内容如下：

 

<Resource name="jdbc/BBS" auth="Container" type="javax.sql.DataSource" driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver" url="jdbc:sqlserver://192.168.1.1:1433;DatabaseName=infodb1" username="sa" password="sa" maxActive="4" maxIdle="2" maxWait="5000" />

 

在这里，我用的数据库是sql server2005 ,如果改为mysql数据库的话，需要修改driverClassName="com.microsoft.sqlserver.jdbc.SQLServerDriver"
换成mysql的数据库驱动。

配置seam 的components.xml，该文件放在WEB-INF目录下。

 

<?xml version="1.0" encoding="UTF-8"?><components xmlns="http://jboss.com/products/seam/components" xmlns:core="http://jboss.com/products/seam/core" xmlns:persistence="http://jboss.com/products/seam/persistence" xmlns:security="http://jboss.com/products/seam/security" xmlns:transaction="http://jboss.com/products/seam/transaction" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://jboss.com/products/seam/core http://jboss.com/products/seam/core-2.1.xsd http://jboss.com/products/seam/persistence http://jboss.com/products/seam/persistence-2.1.xsd http://jboss.com/products/seam/transaction http://jboss.com/products/seam/transaction-2.1.xsd http://jboss.com/products/seam/security http://jboss.com/products/seam/security-2.1.xsd http://jboss.com/products/seam/components http://jboss.com/products/seam/components-2.1.xsd http://jboss.com/products/seam/spring http://jboss.com/products/seam/spring-2.1.xsd"> <core:init debug="false" /> <core:manager concurrent-request-timeout="500" conversation-id-parameter="cid" conversation-timeout="120000" /> <transaction:entity-transaction entity-manager="#{em}" /> <persistence:entity-manager-factory name="BBS" /> <persistence:managed-persistence-context auto-create="true" entity-manager-factory="#{BBS}" name="em" /> <security:identity authenticate-method="#{authenticator.authenticate}" /> <core:pojo-cache cfg-resource-name="#{facesContext.externalContext.context.getRealPath('/WEB-INF/cache.xml')}" /></components>

 

注意 <transaction:entity-transaction entity-manager="#{em}" />
 <persistence:entity-manager-factory name="BBS" />
 <persistence:managed-persistence-context auto-create="true"
  entity-manager-factory="#{BBS}" name="em" /> 这几句，其中 <persistence:entity-manager-factory name="BBS" /> 要跟上面的context.xml中的《Resource name="jdbc/BBS" 》一致。

 

接着，我们写一个dao的接口

public interface UserDAO { public void saveUser(User user);}

 

@Name(" UserDAO ")@AutoCreatepublic class UserDAOImpl implements UserDAO { @In private EntityManager em; public void saveUser(User user) throws PersistenceException { em.persist(user); }}

 

@In
     private EntityManager em;  之际就注入进来了，不需要在写数数据库连接的东西了。

在faces层：

@In

private UserDAO userDAO;

这样就可以引入DAO进行操作了