java设计模式之模板模式，站在巨人的肩膀上成功

/**
 * 抽象模板
 */
public abstract class Game {
 /**
 * 具体方法
 */
 public void initialize(){
 System.out.println("game initialize .........");
 }
 /**
 * 抽象方法
 */
 abstract void startPlay();
 abstract void endPlay();
 /**
 * 钩子方法
 * @return 是否需要结束
 */
 boolean isNeedEnd(){
 return false;
 }
 /**
 * 模板方法
 * final修饰 不允许子类修改
 * 每一个游戏先初始化、开始游戏 是否需要结束游戏 根据钩子进行判断
 */
 public final void play(){
 //初始化游戏
 initialize();
 //开始游戏
 startPlay();
 if(isNeedEnd()){
 //结束游戏
 endPlay();
 }
 }
}

/**
 * 具体模板
 * 足球游戏
 */
public class Football extends Game{
 @Override
 void endPlay() {
 System.out.println("Football Game Finished!");
 }
 @Override
 void startPlay() {
 System.out.println("Football Game Started. Enjoy the game!");
 }
 @Override
 boolean isNeedEnd() {
 return false;
 }
}

/**
 * 模板测试类
 */
public class TemplateModeTest {
 public static void main(String[] args) {
 Game game = new Basketball();
 game.play();
 game = new Football();
 game.play();
 }
}

public <T> T execute(StatementCallback<T> action) throws DataAccessException {
 Assert.notNull(action, "Callback object must not be null");
 Connection con = DataSourceUtils.getConnection(getDataSource());
 Statement stmt = null;
 try {
 Connection conToUse = con;
 if (this.nativeJdbcExtractor != null &&
 this.nativeJdbcExtractor.isNativeConnectionNecessaryForNativeStatements()) {
 conToUse = this.nativeJdbcExtractor.getNativeConnection(con);
 }
 stmt = conToUse.createStatement();
 applyStatementSettings(stmt);
 Statement stmtToUse = stmt;
 if (this.nativeJdbcExtractor != null) {
 stmtToUse = this.nativeJdbcExtractor.getNativeStatement(stmt);
 }
 T result = action.doInStatement(stmtToUse);
 handleWarnings(stmt);
 return result;
 }
 catch (SQLException ex) {
 // Release Connection early, to avoid potential connection pool deadlock
 // in the case when the exception translator hasn't been initialized yet.
 JdbcUtils.closeStatement(stmt);
 stmt = null;
 DataSourceUtils.releaseConnection(con, getDataSource());
 con = null;
 throw getExceptionTranslator().translate("StatementCallback", getSql(action), ex);
 }
 finally {
 JdbcUtils.closeStatement(stmt);
 DataSourceUtils.releaseConnection(con, getDataSource());
 }
}

public boolean isSkipResultsProcessing() {
 return this.skipResultsProcessing;
}