服务器端表单检验(非检验框架实现）
public class RegisterForm {private String username;private String password;private String password2;private String email;private String birthday;private String nickname;private String client_checkcode;private String server_checkcode;private Map<String, String> errors = new HashMap<String, String>();//用户名不能为空，并且要是3-8位字母//密码不能为空，并且是3-8位数字//确认密码不能为空，并且要和一次一致//电子邮箱不能为空，并且要是一个格式合法的邮箱//生日可以为空，不为空时，必须要是一个日期//昵称不可以为空，并且要是汉字public boolean validate() {if (username == null || "".equals(username.trim())) {errors.put("username", "用户名不能为空");return false;} else {if (!username.matches("[a-zA-Z]{3,8}")) {errors.put("username", "用户名必须为3到8位字母");return false;}}if (password == null || "".equals(password.trim())) {errors.put("password", "密码不能为空");return false;} else {if(!password.matches("\\d{3,8}")) {errors.put("password", "密码必须为3到8位数字");return false;}}if (password2 == null || "".equals(password2.trim())) {errors.put("password2", "确认密码不能为空");return false;} else {if (!password2.equals(password)) {errors.put("password2", "两次密码必须一致");return false;}}if(email==null || "".equals(email.trim())) {errors.put("email", "邮箱不能为空");return false;} else {if(!email.matches("\\w+@\\w+[\\.\\w]+")) { //sabc@sina.comerrors.put("email", "邮箱格式不正确");return false;}}if (birthday != null && !"".equals(birthday.trim())) {try {DateLocaleConverter dlc = new DateLocaleConverter();dlc.convert(birthday, "yyyy-MM-dd");} catch(Exception e) {errors.put("birthday", "日期格式不正确");return false;}}if (nickname == null || "".equals(nickname.trim())) {errors.put("nickname", "昵称不能为空");return false;} else {if (!nickname.matches("^([\u4e00-\u9fa5]+)$")) {errors.put("nickname", "昵称应为汉字");return false;}}if (client_checkcode == null || "".equals(client_checkcode.trim())) {errors.put("client_checkcode", "必须输入验证码");return false;} else {if (!server_checkcode.equals(client_checkcode)) {errors.put("client_checkcode", "验证码正确");return false;}}return true;}public String getUsername() {return username;}public void setUsername(String username) {this.username = username;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String getPassword2() {return password2;}public void setPassword2(String password2) {this.password2 = password2;}public String getEmail() {return email;}public void setEmail(String email) {this.email = email;}public String getBirthday() {return birthday;}public void setBirthday(String birthday) {this.birthday = birthday;}public String getNickname() {return nickname;}public void setNickname(String nickname) {this.nickname = nickname;}public String getClient_checkcode() {return client_checkcode;}public void setClient_checkcode(String client_checkcode) {this.client_checkcode = client_checkcode;}public String getServer_checkcode() {return server_checkcode;}public void setServer_checkcode(String server_checkcode) {this.server_checkcode = server_checkcode;}public Map<String, String> getErrors() {return errors;}public void setErrors(Map<String, String> errors) {this.errors = errors;}}