这是我的HTML页面
<!DOCTYPE html>
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html" charset="UTF-8"; />
<title>注册</title>
<style>
#content{
width: 500px;
height: 500px;
margin: 0px auto;
}
</style>
<link rel="stylesheet" type="text/css" href="bootstrap/css/bootstrap.css" charset="UTF-8"/>
<script src="js/addr.js" type="text/javascript" charset="utf-8"></script>
<script src="js/jquery-3.4.1.min.js" type="text/javascript" charset="utf-8"></script>
<script src="bootstrap/js/bootstrap.min.js" type="text/javascript" charset="utf-8"></script>
</head>
<body>
<div id="content">
<h2>用户注册</h2>
<form action="/day01/test" method="post">
<div class="form-group">
<label for="User">User</label>
<input type="text" class="form-control" id="User" placeholder="UserName" name="UserName">
</div>
<div class="form-group">
<label for="Password">Password</label>
<input type="password" class="form-control" id="Password" placeholder="Password" name="pwd">
</div>
<label>籍贯</label> 
<select id="prov" class="from-control" name="p">
<option selected="selected" disabled="disabled">---请选择---</option>
</select> <label for="prov">省</label>
<select id="city" class="from-control" name="c">
<option selected="selected" disabled="disabled">---请选择---</option>
</select><label for="city">市</label>
<select id="area" class="from-control" name="a">
<option selected="selected" disabled="disabled">---请选择---</option>
</select><label for="area">县/区</label>
<div class="form-group">
<label for="Address">Address</label>
<input type="text" class="form-control" id="Address" placeholder="地址" name="ad">
</div>
<div class="radio">
<label>
<input type="radio" name="gender" id="Gender1" value="男" checked>
男
</label>
<label>
<input type="radio" name="gender" id="Gender2" value="女">
女
</label>
</div>
<label>个人简历</label>
<textarea class="form-control" rows="3" name="jl"></textarea>
<label>备注</label>
<textarea class="form-control" rows="3" name="bz"></textarea>
<br/>
<button type="submit" class="btn btn-default">Submit</button>
</form>
</div>
</body>
<script>
$.each(temp,function(i,d){
var provStr='<option value="'+d.code+'">'+d.label+'</option>';
$("#prov").append(provStr);
})
$("#prov").change(function(){
$("#city").html('<option selected="selected" disabled="disabled">---请选择---</option>');
$("#area").html('<option selected="selected" disabled="disabled">---请选择---</option>');
var provCode=$("#prov").val();
console.log(provCode);
$.each(temp,function(i,d){
if(provCode==d.code){
$.each(d.children,function(i,f){
var cityStr='<option value="'+f.code+'">'+f.label+'</option>';
$("#city").append(cityStr);
})
}
})
})
$("#city").change(function(){
$("#area").html('<option selected="selected" disabled="disabled">---请选择---</option>');
var cityCode=$("#city").val();
var provCode=$("#prov").val();
$.each(temp,function(i,d){
if(provCode==d.code){
$.each(d.children,function(i,d){
if(cityCode==d.code){
$.each(d.children,function(i,d){
var areaStr='<option value="'+d.code+'">'+d.label+'</option>';
$("#area").append(areaStr);
})
}
})
}
})
})
</script>
</html>
这个是在tomcat上显示的页面
网上的答案都是说修改编码 全都试了都没有用