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基本的Spring MVC登錄頁面功能不起作用。 數據庫連接正常。 當我輸入正確的用戶名和密碼時，它將轉到else條件。 if循環功能不起作用。請有人幫我基本的Spring MVC登錄頁面功能不起作用
LoginController
package com.programcreek.helloworld.controller;
import java.sql.SQLException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.ModelAndView;
@Controller
public class LoginController {
@RequestMapping("/login")
public ModelAndView viewLogin()
{
ModelAndView mv = new ModelAndView("login");
return mv;
}
@RequestMapping(value ="/submitlogin", method= RequestMethod.POST)
public ModelAndView submituserLogin(@RequestParam("userName")String userName, @RequestParam("password")String password) throws SQLException
{
ApplicationContext context =
new ClassPathXmlApplicationContext("Beans.xml");
LicenseManagementDaoImp LicenseManagementDaoImp =
(LicenseManagementDaoImp)context.getBean("LicenseManagementDaoImp");
UserAccountController formInfo = new UserAccountController(userName,password);
UserAccountController userAcc = LicenseManagementDaoImp.loginInfo(userName);
if(formInfo.getUserName() == userAcc.getUserName() && formInfo.getPassword() == userAcc.getPassword())
{
ModelAndView mv = new ModelAndView("loginsuccess");
mv.addObject("headermsg","You have successfully logged in");
mv.addObject("msg1", userAcc.getUserName());
mv.addObject("msg2", userAcc.getPassword());
return mv;
}
else
{
ModelAndView mv = new ModelAndView("login");
mv.addObject("msg1", "Please enter a Valid Username or Password");
return mv;
}
}
}
UserAccountController
package com.programcreek.helloworld.controller;
public class UserAccountController
{
private String userName;
private String password;
public UserAccountController()
{
}
public UserAccountController(String userName, String password)
{
super();
this.userName = userName;
this.password = password;
}
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;
}
}
LicenseManagementDaoImp
package com.programcreek.helloworld.controller;
import java.sql.SQLException;
import javax.sql.DataSource;
import org.springframework.dao.EmptyResultDataAccessException;
import org.springframework.jdbc.core.JdbcTemplate;
public class LicenseManagementDaoImp
{
private DataSource dataSource;
private JdbcTemplate jdbcTemplateObject;
public void setDataSource(DataSource dataSource)
{
this.dataSource = dataSource;
this.jdbcTemplateObject = new JdbcTemplate(dataSource);
}
public UserAccountController loginInfo(String userName) throws SQLException
{
try
{
String SQL = "Select strusername, strpassword from user where strusername = ? ";
UserAccountController userAcc = jdbcTemplateObject.queryForObject(SQL, new LicenseManagementMapper(), userName);
return userAcc;
}
catch(EmptyResultDataAccessException e)
{
return new UserAccountController();
}
}
}
LicenseManagementMapper
package com.programcreek.helloworld.controller;
import java.sql.ResultSet;
import java.sql.SQLException;
import org.springframework.jdbc.core.RowMapper;
public class LicenseManagementMapper implements RowMapper<UserAccountController>
{
public UserAccountController mapRow(ResultSet rs, int rowNum) throws SQLException
{
UserAccountController userAcc = new UserAccountController();
userAcc.setUserName(rs.getString("strusername"));
userAcc.setPassword(rs.getString("strpassword"));
return userAcc;
}
}