servlet中文显示乱码：
第一种情况：servlet中输出中文字符，如：
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
out.println("<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\">");
out.println("<HTML>");
out.println(" <HEAD><TITLE>A Servlet</TITLE></HEAD>");
out.println(" <BODY>");
out.print(" 中国网页设计http://www.125jz.com-最权威的网页设计教程站 ");
out.println(" </BODY>");
out.println("</HTML>");
out.flush();
out.close();
}
运行显示：??????http://www.125jz.com-???????????
解决方法：
把response.setContentType(“text/html”);改为response.setContentType(“text/html;charset=UTF-8”);
第二种情况：servlet接收表单传值并显示，表单字段含中文。
如：
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType(“text/html;charset=UTF-8”);
request.setCharacterEncoding(“UTF-8”);
PrintWriter out = response.getWriter();
out.println(“<!DOCTYPE HTML PUBLIC \”-//W3C//DTD HTML 4.01 Transitional//EN\”>”);
out.println(“<HTML>”);
out.println(” <HEAD><TITLE>A Servlet</TITLE></HEAD>”);
out.println(” <BODY>”);
String name=request.getParameter(“name”);//接收表单传递的参数值，含中文。
out.println(“hello “+name);
out.println(” </BODY>”);
out.println(“</HTML>”);
out.flush();
out.close();
}
解决方法：在servlet程序中加上以下代码就可以了：
response.setContentType(“text/html;charset=UTF-8”);
request.setCharacterEncoding(“UTF-8”);
如果页面编码是gb2312只需将以上代码中的UTF-8换成gb2312即可。
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