当我从servlet返回时如何显示不同的div？

<div id="div1">Div 1</div>
<div id="div2">Div 2</div>
<div id="div3">Div 3</div>

// 根据条件设置响应数据
String responseData = "";
if (condition1) {
    responseData = "{\"divToShow\": \"div1\"}";
} else if (condition2) {
    responseData = "{\"divToShow\": \"div2\"}";
} else {
    responseData = "{\"divToShow\": \"div3\"}";
}

// 设置响应内容类型为JSON
response.setContentType("application/json");
response.setCharacterEncoding("UTF-8");

// 将响应数据写入响应流
response.getWriter().write(responseData);

<script>
    // 发送请求获取响应数据
    // ...

    // 解析响应数据
    var responseData = JSON.parse(xhr.responseText);
    var divToShow = responseData.divToShow;

    // 根据div id显示对应的div
    document.getElementById(divToShow).style.display = "block";
</script>