本文共 1664 字,大约阅读时间需要 5 分钟。
我们从两个方面入手,1 服务器对浏览器的响应 ,2 浏览器对服务器的请求
one by one
让我们画图来说明这个复杂的问题吧,这样还能易于理解点。
好了,看完这个我相信你可以理解的很好了,我觉得我解释的够清楚了。
使用代码:
response.setHeader("Content-Type", "text/html;charset=utf-8"); PrintWriter printWriter = response.getWriter(); printWriter.println("你好,我用的是UTF-8"); printWriter.close();
一样我们还是来用图说话
怎么样,明白了吧,我们把解决的重点放在页面中点击表单或链接提交数据,而不去理会地址栏直接给参数,因为没有人这样做。好了,让我们来看个案例吧:
get方法MyHtml.html
/** * 这个servlet用来接收表单或超链接的请求 * @author 74087 * */public class RequestEncodingTest extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String name = request.getParameter("name"); String password = request.getParameter("password"); byte[] names = name.getBytes("ISO-8859-1");//进行反编码得到字节数组 byte[] passwords = password.getBytes("ISO-8859-1"); name = new String(names,"UTF-8");//按照我们需要的编码方式进行编码 password = new String(passwords,"UTF-8"); response.setHeader("Content-Type", "text/html;charset=utf-8"); PrintWriter pw = response.getWriter(); pw.println("name=" + name); pw.println("password=" + password); pw.close(); } public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { request.setCharacterEncoding("utf-8");//设置编码方式 String name = request.getParameter("name"); String password = request.getParameter("password"); response.setHeader("Content-Type", "text/html;charset=utf-8"); PrintWriter pw = response.getWriter(); pw.println("name=" + name); pw.println("password=" + password); pw.close(); }}