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                            ## PreparedStatement
PreparedStatement是Statement的子類,作用是放置SQL注入,內部會自動對SQL語句進行轉義,讓這個SQL語句中和SQL語法有關的字符都失效.
最常用的就是setObject().
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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