为什么我得到带有额外字符的responseText(通过Ajax从Servlet到javaScript)?
我在一个项目中工作。在其中,我尝试从使用以下代码创建的会话中获取用户名:- GetCurrentUserInfo.java为什么我得到带有额外字符的responseText(通过Ajax从Servlet到javaScript)?,javascript,ajax,servlets,Javascript,Ajax,Servlets,我在一个项目中工作。在其中,我尝试从使用以下代码创建的会话中获取用户名:- GetCurrentUserInfo.java package servlet; import java.io.IOException; import java.io.ObjectOutputStream; import java.io.OutputStream; import java.util.Vector; import javax.servlet.ServletConfig; import javax.ser
package servlet;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.util.Vector;
import javax.servlet.ServletConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class GetCurrentUserInfo extends HttpServlet
{
ServletContext contx = null;
public void init(ServletConfig config) throws ServletException
{
contx = config.getServletContext();
}
public void doPost(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException
{
try
{
OutputStream outer = res.getOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(outer);
String userName = (String) req.getSession().getAttribute("username");
oos.writeChars(userName);
oos.flush();
oos.close();
}
catch (Throwable e)
{
e.printStackTrace();
}
}
}
调用.js
function getUserInfo()
{
var userInfoHttp;
if (window.XMLHttpRequest)
{
userInfoHttp = new XMLHttpRequest()
}
else if (window.ActiveXObject)
{
userInfoHttp = new ActiveXObject("Microsoft.XMLHTTP")
}
userInfoHttp.open("POST", "GetCurrentUserInfo", false);
userInfoHttp.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
userInfoHttp.onreadystatechange = function ()
{
if (userInfoHttp.readyState == 4)
{
if (userInfoHttp.status == 200)
{
var res = TrimString(userInfoHttp.responseText);
alert(res);
}
}
}
userInfoHttp.send(null);
isAnnotationUpdate = false;
}
我想我得到的用户名中有一些额外的字符,如:���W�s�@�s�.�C�o�m“
实际上,我的用户名是s@s.com只有。我认为有两件事可以解决您的编码问题 首先使用OutputStreamWriter并为其指定编码值
OutputStream stream = response.getOutputStream();
OutputStreamWriter writer = new OutputStreamWriter(stream, "UTF-8");
String userName=(String)req.getSession().getAttribute("username");
writer.write(userName);
writer.flush();
然后确保您的响应具有正确的编码
response.setCharacterEncoding("UTF-8");
相关文章:
更新
还有一件事我在最初的回答中忘了。将响应对象的ContentyOe设置为text/plain,因为实际上返回的是纯文本字符
response.setContentType("text/plain");
我认为有两件事可以解决您的编码问题 首先使用OutputStreamWriter并为其指定编码值
OutputStream stream = response.getOutputStream();
OutputStreamWriter writer = new OutputStreamWriter(stream, "UTF-8");
String userName=(String)req.getSession().getAttribute("username");
writer.write(userName);
writer.flush();
然后确保您的响应具有正确的编码
response.setCharacterEncoding("UTF-8");
相关文章:
更新
还有一件事我在最初的回答中忘了。将响应对象的ContentyOe设置为text/plain,因为实际上返回的是纯文本字符
response.setContentType("text/plain");