servlet中的多重删除

Question

protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub //response.getWriter().append("Served at: ").append(request.getContextPath()); 

String[] id = request.getParameterValues("hiddenID"); 
//int id=Integer.parseInt(request.getParameter("hiddenID")); 

foodDB db = new foodDB(); 
Boolean success = db.deletefood(id); 

//Boolean success=(Boolean)db.deletefood("%" + id + "%"); 
//boolean success=(Boolean)db.deletefood(F); 

request.setAttribute("success", success); 

RequestDispatcher rd = request.getRequestDispatcher("delete.jsp"); 
rd.forward(request, response); 

} 

这是我的servlet部分。通过使用复选框选中数据库中的多个删除。但它不起作用。

Answer 1

这种说法是错误

pstmt.setString(1, "%" + id + "%"); 

这里id是一个字符串数组。所以你传递字符串数组对象到setString()。但不是数组值。

使用for-each循环来从数组id中获取每个id。

PreparedStatement pstmt=null; 

for(String i:id) 
{ 
    pstmt=conn.prepareStatement(sqlStr); 
    pstmt.setString(1, "%" + i + "%"); 
    //now execute it 

}