//我从MySQL检索了一个Result并创建了,并且Array-list User .i已经发送了这个// US er Array-list并通过请求Response Object发送它。现在我需要在//页面上显示它。 //1.没有JSTL //2.With JSTL
//表的名称是user_reg,它有四个字段id,用户名,密码,电子邮件。 //请用例子解释我需要在jsp页面中显示所有字段。但我不想//在JSP上做jdbc工作
package kinder.dto;
public class User {
private String id;
private String userName;
private String saltedkey;
private String emailId;
private String legalName;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getLegalName() {
return legalName;
}
public void setLegalName(String legalName) {
this.legalName = legalName;
}
public String getEmailId() {
return email;
}enter code here`
public void setEmailId(String emailId) {
this.emailId = emailId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return saltedkey;
}
public void setPassword(String password) {
this.saltedkey = password;
}
}
//dto
package kinder.dto;
public class User {
private String id;
private String userName;
private String saltedkey;
private String emailId;
private String legalName;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getLegalName() {
return legalName;
}
public void setLegalName(String legalName) {
this.legalName = legalName;
}
public String getEmailId() {
return emailId;
}
public void setEmailId(String emailId) {
this.emailId = emailId;
}
public String getUserName() {
return userName;
}
public void setUserName(String userName) {
this.userName = userName;
}
public String getPassword() {
return saltedkey;
}
public void setPassword(String password) {
this.saltedkey = password;
}
}
// servlet的
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
List<User> users = UserDAO.list();
request.setAttribute("users", users); // Will be available as ${products} in JSP
request.getRequestDispatcher("loginSuccess.jsp").forward(request, response);
} catch (SQLException | ClassNotFoundException e) {
throw new ServletException("Cannot obtain products from DB", e);
}
}
//如何在JSP页面中获取它
答案 0 :(得分:2)
get some like this :
on jsp psge :
<% ArrayList<user> userList=(ArrayList<user>) request.getAttribute("user");
Iterator<user> iter = userList.iterator();
while(iter.hasNext()){
user user = iter.next();
使用pojo类访问它:
user.getUsername(); user.getPassword();
%>
答案 1 :(得分:1)
您需要创建POJO类
class UserReg {
private Integer id;
private String userName;
private String password;
private String email;
//getters and setters
}
需要更改列表填充逻辑
//code.....
ResultSet rs = ...;
ArrayList<UserReg> usersList = new ArrayList<UserReg>();
while(rs.next()) {
//here create new object of UserReg for each row
UserReg user = new UserReg();
user.setId(rs.getInt(0));
// do it for userName, password, email
.....
.....
....
// last add to list
usersList.add(user);
}
//set list in request scope and forward request to JSP
request.setAttribute("usersList",usersList);
<c:forEach var="user" items="usersList">
<c:out value="${user.id}" />
<c:out value="${user.userName}" />
<c:out value="${user.password}" />
<c:out value="${user.email}" />
</c:forEach>