1.button的type設定為button 而不用submit，並新增onclick方法呼叫js函式

<input type="button" name="confirmAlter" value="確認修改" onclick="changeInfo(form1.code,form1.name,form1.detail,form1.count)"/>

2.傳到js函式中，然後提交表單到servlet並傳遞引數

<script language="javascript">
function changeInfo(code,name,detail,count){
var string1 = code.value;
var string2 = name.value;
var string3 = detail.value;
var number = count.value;
//alert("hello word!");

document.getElementById('form1').action="workServlet?action=alterInfo&code="+string1+"&name="+string2+"&detail="+string3+"&count="+number;
document.getElementById("form1").submit();
}
</script>

3.在servlet中呼叫request.getParameter()方法即可獲取引數