这是一个图书馆管理系统的jsp代码

				
				
				
				
				
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								.style3 {font-size: 24px}
				.style4 {font-size: 18px}
				-->
				
				
				
				
				  
				    
				      
				        
				          
				        
				      
				    
				    
				      
				        
				          
				            
				               
				               
				            
				            
				              
				               Adduser 
				            
				            
				               
				              
				            
				            
				              
				              Modifyuser
				            
				            
				               
				              
				            
				            
				              
				              Deletuser
				            
				            
				               
				              
				            
				            
				              
				              Searchuser
				            
				            
				               
				              
				            
				            
				              
				              BookMenu
				            
				            
				               
				              
				            
				            
				               
				               
				            
				          
				        
				        
				           
				        
				      
				      
				        
				          Modify user 
				          
				        
				          ID:
				          
				          
				***
				        
				        
				          Course:
				          
				        
				        
				          Number:
				          
				        
				        
				          Code:
				          
				        
				        
				          Phone:
				          
				        
				        
				          Email:
				          
				        
				        
				          Oicq:
				          
				        
				        
				          Maxbook:
				          
				        
				        
				                      
				            
				              
				              
				            
				          
				          
				      
				    
				    
				       
				      
				    
				  
				
				
				
				
				
								String id = request.getParameter("modifyuserid");
				String course = request.getParameter("modifyusercourse");
				String studentnumber = request.getParameter("modifyusernumber");
				String code = request.getParameter("modifyusercode");
				String phone = request.getParameter("modifyuserphone");
				String email = request.getParameter("modifyuseremail");
				String oicq = request.getParameter("modifyuserqq");
				String maxbook = request.getParameter("modifyusermax");
				
				try{
				  if(request.getParameter("modifyuserenter")!=null && id!=null){
				    Connection conn=Library.getConn();
				  Statement stmt=conn.createStatement();
				    if(course!=null){
				    String updatecourse = "update user set course ='" + course +"' where id ='" + id + "'";
				    stmt.execute(updatecourse);}
				    if(studentnumber!=null){
				    String updatenumber = "update user set studentnumber ='" + studentnumber +"' where id ='" + id + "'";
				    stmt.execute(updatenumber);}
				    if(code!=null){
				    String updatecode = "update user set code ='" + code +"' where id ='" + id + "'";
				    stmt.execute(updatecode);}
				    if(phone!=null){
				    String updatephone = "update user set phone ='" + phone +"' where id ='" + id + "'";
				    stmt.execute(updatephone);}
				    if(email!=null){
				    String updateemail = "update user set email ='" + email +"' where id ='" + id + "'";
				    stmt.execute(updateemail);}
				    if(oicq!=null){
				    String updateoicq = "update user set oicq ='" + oicq +"' where id ='" + id + "'";
				    stmt.execute(updateoicq);}
				    if(maxbook!=null){
				    String updatemax = "update user set maxbook ='" + maxbook +"' where id ='" + id + "'";
				    stmt.execute(updatemax);}
				    response.sendRedirect("success.jsp");
				  }
				
				}catch (Exception ex) {
				  response.sendRedirect("fail.jsp");
				ex.printStackTrace();}
				
				%>