麻烦给我注释下此段代码 班级管理界面

来源：百度知道 编辑：UC知道 时间：2024/09/23 19:42:37
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

response.setContentType("text/html;charset=gb2312");
request.setCharacterEncoding("gb2312");
PrintWriter out = response.getWriter();
String xueyuan=request.getParameter("xueyuan");
String banji=request.getParameter("banji");
ADD_banji add = new ADD_banji();
int i=add.add_banji(banji,xueyuan);
if(i==0){
out.println("<script>");
out.println("alert('添加失败！');");
out.println("window.location='banji_manage.jsp'");
out.println("</script>");
}else{
out.println("<script>");
out.println("alert('恭喜！添加成功！');");
out.println("window.location='banji_manage.jsp'");
out.println("</scri

response.setContentType("text/html;charset=gb2312");//返回类型为html,字符为gb2312
request.setCharacterEncoding("gb2312");//传递过来的参数gb2312编码
PrintWriter out = response.getWriter();//创建输出流
String xueyuan=request.getParameter("xueyuan");//获得之前表单的数据
String banji=request.getParameter("banji");
ADD_banji add = new ADD_banji();//创建实例
int i=add.add_banji(banji,xueyuan);//调用方法，应该是为插入的方的
if(i==0){
out.println("<script>");//JS代码弹出相应的框
out.println("alert('添加失败！');");
out.println("window.location='banji_manage.jsp'");//页面URL的重定向
out.println("</script>");
}else{
out.println("<script>");
out.println("alert('恭喜！添加成功！');");
out.println("window.location='banji_manage.jsp'");
out.println("</script>");
}