关于“实在太难看了，能不能让这段代码好看一点？需要实现相同的功能：每一条语句都要执行”的一种解决方案

Question

原问题链接为：http://topic.csdn.net/u/20071228/11/79119d03-4fd1-4a27-b394-78ca1258b400.html由于原问题已关闭，所以新开一个帖子讨论。简单描述如下：发帖人：microsealkey 其实我这儿的问题是通常性的讲，并非是专门针对联接的。 就是在对象生命周期结束的时候，需要关闭所有打开资源，为了确保所有资源关闭（即使发生异常也要尽可能关闭所有资源），所以必须一次一次的try...finally 其实我这段代码是放在finalize()里面的：在对象生命周期结束的时候，确保关闭所有资源（数据库，文件等等）。 所以应该没有什么好分解的吧？这儿仅仅就是关闭资源的代码。

public void close() throws IOException, SQLException {
        try {
            saveDisk();
        } finally {
            try {
                mDelLogStmt.close();
            } finally {
                try {
                    mUpdateWorkingStmt.close();
                } finally {
                    try {
                        mDataStmt.close();
                    } finally {
                        try {
                            mShareSearcher.destroyShareObj();
                        } finally {
                            try {
                                mw.close();
                            } finally {
                                try {
                                    mMemDir.close();
                                } finally {
                                    try {
                                        mDiskDir.close();
                                    } finally {
                                        mDiskDir= null;
                                        mMemDir= null;
                                        mw= null;
                                        mShareSearcher= null;
                                        mDataStmt= null;
                                        mUpdateWorkingStmt= null;
                                        mDelLogStmt= null;
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
解决方案来自《Java解惑》（美 Joshua Bloch Neal Gafter著，陈昊鹏译，人民邮电出版社出版）P88～P89第41个谜题。 
这种代码重构方式是从5.0开始的，利用的是Closeable接口 
具体模式如下： try
{
//some code
}
finally
{ 
closeIgnoringException(in); 
closeIgnoringException(out); 
} 
} 
private static void closeIgnoringException(Closeable c)
{ 
if( c!= null )
{ 
try
{ 
c.close(); 
}
catch(IOException ex)
{ 
//There is nothing we can do if close fails 
} 
} 
} 

Answer 1

重新整理一下Java代码public   void   close()   throws   IOException,   SQLException   { 
                try   { 
                        saveDisk(); 
                }   finally   { 
                        try   { 
                                mDelLogStmt.close(); 
                        }   finally   { 
                                try   { 
                                        mUpdateWorkingStmt.close(); 
                                }   finally   { 
                                        try   { 
                                                mDataStmt.close(); 
                                        }   finally   { 
                                                try   { 
                                                        mShareSearcher.destroyShareObj(); 
                                                }   finally   { 
                                                        try   { 
                                                                mw.close(); 
                                                        }   finally   { 
                                                                try   { 
                                                                        mMemDir.close(); 
                                                                }   finally   { 
                                                                        try   { 
                                                                                mDiskDir.close(); 
                                                                        }   finally   { 
                                                                                mDiskDir=   null; 
                                                                                mMemDir=   null; 
                                                                                mw=   null; 
                                                                                mShareSearcher=   null; 
                                                                                mDataStmt=   null; 
                                                                                mUpdateWorkingStmt=   null; 
                                                                                mDelLogStmt=   null; 
                                                                        } 
                                                                } 
                                                        } 
                                                } 
                                        } 
                                } 
                        } 
                } try 
{ 
//some   code 
} 
finally 
{   
closeIgnoringException(in);   
closeIgnoringException(out);   
}   
}   
private   static   void   closeIgnoringException(Closeable   c) 
{   
if(   c!=   null   ) 
{   
try 
{   
c.close();   
} 
catch(IOException   ex) 
{   
//There   is   nothing   we   can   do   if   close   fails   
}   
}   
}   

Answer 2

可以写回调然后利用反射来依次执行回调类中的方法每次执行都try{}