Struts

/* * Created on Feb 23, 2006 * * TODO To change the template for this generated file go to * Window - Preferences - Java - Code Style - Code Templates */ package struts.sample.cap10.sample3.ejb; import java.rmi.RemoteException; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import java.sql.SQLException; import java.util.ArrayList; import java.util.Collection; import javax.ejb.CreateException; import javax.ejb.EJBException; import javax.ejb.EntityBean; import javax.ejb.EntityContext; import javax.ejb.FinderException; import javax.ejb.NoSuchEntityException; import javax.ejb.RemoveException; import javax.naming.InitialContext; import javax.naming.NamingException; import javax.sql.DataSource; import struts.sample.cap10.sample3.entity.AttackSolution; /** * XDoclet-based BMP entity bean. * * To generate EJB related classes using XDoclet: - Add Standard EJB module to * XDoclet project properties - Customize XDoclet configuration - Run XDoclet * * Below are the xdoclet-related tags needed for this EJB. * * @ejb.bean name="AttackSolutionEntity" display-name="Name for AttackSolutionEntity" * description="Description for AttackSolutionEntity" * jndi-name="ejb/AttackSolutionEntity" type="BMP" view-type="remote" */ public class AttackSolutionBMP implements EntityBean { private String attack_event_code; private String attack_mean; private String attack_action; /** The entity context */ private EntityContext context; private DataSource ds; private String dbjndi = "PostgresDS"; private Connection con; /** * @return Returns the attack_action. */ public String getAttack_action() { return attack_action; } /** * @param attack_action * The attack_action to set. */ public void setAttack_action(String attack_action) { this.attack_action = attack_action; } /** * @return Returns the attack_event_code. */ public String getAttack_event_code() { return attack_event_code; } /** * @param attack_event_code * The attack_event_code to set. */ public void setAttack_event_code(String attack_event_code) { this.attack_event_code = attack_event_code; } /** * @return Returns the attack_mean. */ public String getAttack_mean() { return attack_mean; } /** * @param attack_mean * The attack_mean to set. */ public void setAttack_mean(String attack_mean) { this.attack_mean = attack_mean; } /** * */ public AttackSolutionBMP() { super(); // TODO Auto-generated constructor stub } /** * There are zero or more ejbCreate <METHOD>(...) methods, whose signatures * match the signatures of the create <METHOD>(...) methods of the entity * bean?s home interface. The container invokes an ejbCreate <METHOD>(...) * method on an entity bean instance when a client invokes a matching create * <METHOD>(...) method on the entity bean?s home interface. <br> * * The entity bean provider?s responsibility is to initialize the instance * in the ejbCreate < METHOD>(...) methods from the input arguments, using * the get and set accessor methods, such that when the ejbCreate * <METHOD>(...) method returns, the persistent representation of the * instance can be created. <br> * * The entity bean provider must not attempt to modify the values of * cmr-fields in an ejbCreate < METHOD(...) method; this should be done in * the ejbPostCreate <METHOD(...) method instead. <br> * * The entity object created by the ejbCreate <METHOD>method must have a * unique primary key. This means that the primary key must be different * from the primary keys of all the existing entity objects within the same * home. However, it is legal to reuse the primary key of a previously * removed entity object. The implementation of the bean provider?s * ejbCreate < METHOD>(...) methods should be coded to return a null. <br> * * An ejbCreate <METHOD>(...) method executes in the transaction context * determined by the transaction attribute of the matching create * <METHOD>(...) method. The database insert operations are performed by the * container within the same transaction context after the Bean Provider?s * ejbCreate <METHOD>(...) method completes. * * @throws CreateException * Thrown if method fails due to system-level error. * * @throws CreateException * * @ejb.create-method */ public String ejbCreate(String attack_event_code, String attack_mean, String attack_action) throws CreateException { PreparedStatement ps = null; try { //SQL语句“插入fw_attacksolution表” String sql = " INSERT INTO fw_attacksolution(attack_event_code," + "attack_mean, attack_action) VALUES (?,?,?)"; con = ds.getConnection(); //利用Connection对象的prepareStatement方法创建一个对象 //该对象将被作为PreparedStatement接口的一个接口实例 ps = con.prepareStatement(sql); //将攻击类别代码号进行SQL预处理 ps.setString(1, attack_event_code); //将攻击类别含义进行SQL预处理 ps.setString(2, attack_mean); //将攻击类别的处理解决方法进行SQL预处理 ps.setString(3, attack_action); //执行SQL并判断是否已经有一条记录被插入。 //executeUpdate方法判断是否有一条记录被更动，若更动则为1，否则则为0 if (ps.executeUpdate() != 1) { //若没有更动一条记录则表示出错，将抛出错误。表示添加结果失败 throw new EJBException(); } } catch (SQLException sqle) { throw new EJBException(sqle); } finally { //在完成整段代码的工作后必须将JDBC连接关闭 try { if (ps != null) { ps.close(); con.close(); } } catch (SQLException e) { e.printStackTrace(); throw new RuntimeException("ERROR.UNEXPECTED"); } } this.setAttack_event_code(attack_event_code); this.setAttack_mean(attack_mean); this.setAttack_action(attack_action); return attack_event_code; } /** * For each ejbCreate <METHOD>(...) method, there is a matching * ejbPostCreate < METHOD>(...) method that has the same input parameters * but whose return type is void. The container invokes the matching * ejbPostCreate <METHOD>(...) method on an instance after it invokes the * ejbCreate <METHOD>(...) method with the same arguments. The instance can * discover the primary key by calling getPrimaryKey() on its entity context * object. <br> * * The entity object identity is available during the ejbPostCreate * <METHOD>(...) method. The instance may, for example, obtain the component * interface of the associated entity object and pass it to another * enterprise bean as a method argument. <br> * * The entity Bean Provider may use the ejbPostCreate <METHOD>(...) to set * the values of cmr-fields to complete the initialization of the entity * bean instance. An ejbPostCreate <METHOD>(...) method executes in the same * transaction context as the previous ejbCreate <METHOD>(...) method. * * @throws CreateException * Thrown if method fails due to system-level error. */ p