java绘制图片验证码两种方式实现，点击【图片】刷新和点击【看不清换一张】刷新
转载地址：https://blog.csdn.net/Jiang_Rong_Tao/article/details/78063295
点击打开链接
1、（看不清，换一张），点击刷新验证码
<img id="image1" src="http://localhost:8080/om/Ik" border="1" class="verifyimg" height="30px" width="120 px" "/>
<a href="#" οnclick="changeCode();">看不清，换一张</a><br/>
<script type="text/javascript">
function changeCode(){
var img=document.getElementById("image1");
img.src="http://localhost:8080/onlineExam/ImageChack?"+new Date().getTime();
}
</script>
2、点击验证码，即可刷新验证码的图片
<img id="image1" src="http://localhost:8080/om/Ik" border="1" class="verifyimg" height="30px" width="120 px" onClick="getcode(this)"/>
<script type="text/javascript">
function getcode() {
var randomnum = Math.random();
var img = document.getElementById("image1");
img.src = "http://localhost:8080/om/Ik?d=" + randomnum;
}
