當你用ajax傳遞值到伺服器端，如果值中包含特殊字元串如+，&等，在伺服器端擷取的結果可能就會出現差異，因為這些字元有其它用途，如“+”表示串連符，在轉義後你擷取到的就是空格。
可以看看這些特殊字元與十六進位的關係：
| + |
空格 |
/ |
? |
% |
& |
= |
# |
| %2B |
%20 |
%2F |
%3F |
%25 |
%26 |
&3D |
%23 |
如果變數中確實需要包含這些特殊字元，請用encodeURIComponent()函數過濾，它會對這些字元編碼，伺服器端是會被自動解碼的，不需要處理。
另外，盡量提交json格式資料 如 {a:"aaa", b:"bbb"} 而非 "a=aaa&b=bbb"
例子
| 代碼如下 |
複製代碼 |
<script type="text/javascript">
//alert("你好");
function good(){
//alert("您好 Ajax");
var myurl = document.getElementById("txtUrl").value;
var mydata = {"URL" : myurl};
alert(myurl);
var jsonData = {"ClientName":"愛&國","URL":"http://192.168.1.8:9080/GeoSearch?Request=geo&level=geometry&ClientName=美國"};
$.ajax({
type: "POST",
//ContentType: "text/xml;utf-8",//這裡需要加個utf-8
//dataType:"xml",
url: "Tserver",
//dataType:"xml",
data:mydata,
//data:jsonData,
//data:{"ClientName":"愛&國","URL":"http://192.168.1.8:9080/GeoSearch?Request=geo&level=geometry&ClientName=美國"},
//data: "ClientName=J/&o#愛國美麗&##hn@@@@人&location=Boston",
success: function(data, textStatus){
document.getElementById("g").value=data;
//alert(data);
alert(jsonData);
},
error:function (XMLHttpRequest, textStatus, errorThrown) {
// 通常 textStatus 和 errorThrown 之中
// 只有一個會包含資訊
//this; // 調用本次AJAX請求時傳遞的options參數
// alert("bad");
alert(textStatus);
//alert(errorThrown);
}
});
}
</script>
</head>
<body>
<div id="url">
資源地址 :<input type="text" size="50" value="" id="txtUrl" /><br />
資源名字 :<input type="text" size="50" value="" id="txtName" />
</div>
<input type="button" value="Ajax請求" onclick=good() />
<br />
<TextArea rows="10" cols="90" id="g"></TextArea>
<div>
</div>
</body>
</html> |
伺服器端：
| 代碼如下 |
複製代碼 |
package test; import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.*; public class Tserver extends javax.servlet.http.HttpServlet implements javax.servlet.Servlet {
static final long serialVersionUID = 1L; public Tserver() {
super();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
this.doPost(request, response);
}
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType("text/html");
//response.setContentType("text/xml");
//response.setContentType("application/xml");
response.setCharacterEncoding("UTF-8");
request.setCharacterEncoding("UTF-8");
//request.setCharacterEncoding("UTF-8");
//String ServerName = request.getParameter("ClientName");
String ServerName = request.getParameter("URL");
System.out.println(ServerName);
String responseText1 = "your name is: "+ServerName+ " for ever from server";
PrintWriter out = response.getWriter();
out.println("<root>");
out.println(responseText1);
out.println("</root>");
out.close();
}
} |
