Detailed explanation of the steps to add assignment to child elements using jQuery

This time I will bring you jQuery Detailed explanation of the steps for adding values ​​to sub-elements. What are the precautions for adding values ​​to sub-elements with jQuery? The following is a practical case. Let’s take a look. take a look.

##1. Define the tag in the jsp page as follows:

<p>
<span>科室:</span>
<select>
</select>
</p>

2. Write js statements:

<script>
$(function () {
var dname = $(".dept-name-show").eq(0);//选定<select>标签
var url = "${pageContext.request.contextPath}/getDepts.do";//请求路径
$(".dept-name-show").click(function () {
$.get(
url,
function (res) {
var len = res.length;
var op = dname.children().length;
if (op < len) {
var pp = "<option>";
for (var i = 0; i < len; i++) {
dname.append(pp);
dname.children().eq(i).text(res[i].name);
}
}
}
)
})
})
</script>

3. Write the corresponding request statement:

List<dept> deptList=null;
@RequestMapping(value = "/getDepts",method = {RequestMethod.GET})
public void getDepts(HttpServletResponse response) throws IOException {
response.setCharacterEncoding("utf-8");
response.setContentType("text/json;charset=utf-8");
if (deptList == null){
deptList = deptService.findAllDepts();
}else {
String res=JSON.toJSONString(deptList);
response.getWriter().write(res);
}
}</dept>

I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!

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