一、map与each的使用
1 <html> 2 <head> 3 <meta charset="utf-8"> 4 <title>jquerydemo</title> 5 <script src="https://cdn.bootcss.com/jquery/1.10.2/jquery.min.js"> 6 </script> 7 <script> 8 $(document).ready(function(){ 9 $("input").each(function(index, item){ 10 alert($(item).val()); 11 }); 12 $("input").map(function(){ 13 alert($(this).val()); 14 }); 15 }); 16 </script> 17 </head> 18 <body> 19 <input type="text" value="1"/> 20 <input type="text" value="2"/> 21 <input type="text" value="3"/> 22 <input type="text" value="4"/> 23 </body> 24 </html>
二、ajax
$(function () { $.ajax({ type: "GET", url: "some", data: "name=John&location=Boston", success: function(msg){ alert( "Data Saved: " + msg.name ); alert( "Data Saved: " + msg.location ); } }); });
$(function () {
$.ajax({
type: "POST",
url: "some",
data: "name=John&location=Boston",
success: function(msg){
alert( "Data Saved: " + msg.name );
alert( "Data Saved: " + msg.location );
}
});
});
@RequestMapping("/some")
@ResponseBody
public Map<String, Object> getSome(String name, String location) throws IOException {
System.out.println("GET");
Map<String,Object> map = new HashMap<String,Object>();
map.put("name",name);
map.put("location",location);
return map;
}
@RequestMapping(value = "/some",method = RequestMethod.POST)
@ResponseBody
public Map<String, Object> postSome(String name, String location) throws IOException {
System.out.println("POST");
Map<String,Object> map = new HashMap<String,Object>();
map.put("name",name);
map.put("location",location);
return map;
}
三、JSON.parse()和JSON.stringify()区别
JSON.parse()【从一个字符串中解析出json对象】
例子：
//定义一个字符串
var data='{"name":"goatling"}'
//解析对象 就是将json字符串转换为对象
JSON.parse(data)
结果是：
name:"goatling"
JSON.stringify()【从一个对象中解析出字符串】 说白了就是将json对象转换为字符串
var data={name:'goatling'}
JSON.stringify(data)
结果是：
'{"name":"goatling"}'