js获取jsp参数

function getQueryParamByName(name) {
    let queryStr = window.location.search.substring(1); // 去除开头的'?'
    let paramsArray = queryStr.split('&');
    for (let i = 0; i < paramsArray.length; i++) {
        let param = paramsArray[i].split('=');
        if (decodeURIComponent(param[0]) === name) {
            return decodeURIComponent(param[1]);
        }
    }
    return null;
}

// 使用函数获取参数
let param1 = getQueryParamByName('param1');

<form id="myForm">
    <input type="text" id="param1" name="param1">
    <input type="submit" value="Submit">
</form>

<script>
document.getElementById('myForm').addEventListener('submit', function(event) {
    event.preventDefault(); // 阻止表单默认提交行为
    let param1 = document.getElementById('param1').value;
    console.log('Param1:', param1);
    // 这里可以添加进一步的处理逻辑
});
</script>

<%
    String param1 = request.getParameter("param1");
%>

<script type="text/javascript">
    var param1 = "<%= param1 %>";
    console.log('Param1 from JSP:', param1);
</script>