我收到了包含用户名、密码和电子邮件的登录表单
当我不包含所有相关的电子邮件部分时，程序成功运行
但是当我插入电子邮件表格时 我无法显示有效的电子邮件
我有验证方法(Validation.java)
public class Validation {
private String username;
private String password;
private String email;
public String getUsername() {
return username;
}
public String getPassword() {
return password;
}
public String getEmail() {
return email;
}
public void setUsername(String username){
this.username = username;
}
public void setPassword(String password) {
this.password = password;
}
public void setEmai(String email) {
this.email = email;
}
public String validate (String s1, String s2) {
if (s1.contains(username) && s2.equals(password))
return "VALID";
else
return "INVALID";
}
public boolean validateEmail() {
String emailRegex = "^[a-zA-Z0-9_+&*-]+(?:\\." +
"[a-zA-Z0-9_+&*-]+)*@" +
"(?:[a-zA-Z0-9]+\\.)+[a-z]" +
"A-Z]{2,7}$";
Pattern pat = Pattern.compile(emailRegex);
return pat.matcher(email).matches();
}
对于respond.jsp，这是我的代码
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>task 2: login Feedback</title>
</head>
<body style="font-family: Futura; max-width: 600px">
<jsp:useBean id="validation" class="com.lab5.task2.Validation" scope="request">
<jsp:setProperty name="validation" property="username" value='<%=request.getParameter("txtUsername")%>'/>
<jsp:setProperty name="validation" property="password" value='<%=request.getParameter("txtPassword")%>'/>
<jsp:setProperty name="validation" property="email" value='<%=request.getParameter("txtEmail")%>'/>
</jsp:useBean>
<fielset>
<legend>Validation</legend>
<p>You entered username as <jsp:getProperty name="validation" property="username"/></p>
<p>You entered password as <jsp:getProperty name="validation" property="password"/></p>
</br>
<p>You are a <%=validation.validate("Amirul","12345")%></p>
<p> Your email: <jsp:getProperty name="validation" property="email"/>
<%=validation.validateEmail()%>
</fielset>
</body>
我遇到了如何显示有效电子邮件的问题 我无法使用
<%=validation.validateEmail("amirul@gmail.com")%>
代码会产生错误 错误显示在第 18 行处理 JSP 页面/Task2/respond.jsp 时发生异常 这是
<jsp:setProperty name="validation" property="email" value='<%=request.getParameter("txtEmail")%>'/>
最佳答案
您可以像这样在类中添加重载方法
public boolean validateEmail(inputemail) {
String emailRegex = "^[a-zA-Z0-9_+&*-]+(?:\\." +
"[a-zA-Z0-9_+&*-]+)*@" +
"(?:[a-zA-Z0-9]+\\.)+[a-z]" +
"A-Z]{2,7}$";
Pattern pat = Pattern.compile(emailRegex);
return pat.matcher(inputemail).matches();
}
将不带参数的方法更改为
public boolean validateEmail() {
return validateEmail(this.email);
}
您可以使用<%=validation.validateEmail("amirul@gmail.com")%>在 JSP 文件中。
关于java - 我想在 jsp 中显示 boolean 方法以进行电子邮件验证，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/55789790/