Java 在我的Spring MVC web应用程序中为HTTP路径映射的不明确处理程序方法

在对我的

appconfig security.xml

文件进行一些更改后，我出现了此错误

appconfig security.xml

`

`

我正在使用SpringHibernate。请任何人帮我找到可能的错误所在。谢谢

HomeController

package com.trygym.solution.web;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;


@Controller
class HomeController {

private static final Logger logger = LoggerFactory.getLogger(HomeController.class);
/**
 * Simply selects the home view to render by returning its name.
 */
@RequestMapping(value = "/", method = RequestMethod.GET)
private String home(Locale locale, Model model) {
    logger.info("Welcome home! The client locale is {}.", locale);

    Date date = new Date();
    DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, locale);

    String formattedDate = dateFormat.format(date);

    model.addAttribute("serverTime", formattedDate );

    return "home";
}

}

package com.trygym.solution.web;

import com.trygym.solution.model.User;
import com.trygym.solution.service.SecurityService;
import com.trygym.solution.service.UserService;
import com.trygym.solution.validator.UserValidator;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class UserController {
@Autowired
private UserService userService;

@Autowired
private SecurityService securityService;

@Autowired
private UserValidator userValidator;

@RequestMapping(value = "/forget_password", method = RequestMethod.POST)
public String forget_password(Model model) {
    //model.addAttribute("userForm", new User());

    return "forget_password";
}

@RequestMapping(value = "/registration", method = RequestMethod.GET)
public String registration(Model model) {
    model.addAttribute("userForm", new User());

    return "registration";
}

@RequestMapping(value = "/registration", method = RequestMethod.POST)
public String registration(@ModelAttribute("userForm") User userForm, BindingResult bindingResult, Model model) {
    userValidator.validate(userForm, bindingResult);

    if (bindingResult.hasErrors()) {
        return "registration";
    }

    userService.save(userForm);

    securityService.autologin(userForm.getUsername(), userForm.getPasswordConfirm());

    return "redirect:/welcome";
}

@RequestMapping(value = "/login", method = RequestMethod.GET)
public String login(Model model, String error, String logout) {
    if (error != null)
        model.addAttribute("error", "Your username and password is invalid.");

    if (logout != null)
        model.addAttribute("message", "You have been logged out successfully.");

    return "login";
}

@RequestMapping(value = {"/", "/welcome"}, method = RequestMethod.GET)
public String welcome(Model model) {
    return "welcome";
}

UserController

package com.trygym.solution.web;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import java.text.DateFormat;
import java.util.Date;
import java.util.Locale;


@Controller
class HomeController {

private static final Logger logger = LoggerFactory.getLogger(HomeController.class);
/**
 * Simply selects the home view to render by returning its name.
 */
@RequestMapping(value = "/", method = RequestMethod.GET)
private String home(Locale locale, Model model) {
    logger.info("Welcome home! The client locale is {}.", locale);

    Date date = new Date();
    DateFormat dateFormat = DateFormat.getDateTimeInstance(DateFormat.LONG, DateFormat.LONG, locale);

    String formattedDate = dateFormat.format(date);

    model.addAttribute("serverTime", formattedDate );

    return "home";
}

}

package com.trygym.solution.web;

import com.trygym.solution.model.User;
import com.trygym.solution.service.SecurityService;
import com.trygym.solution.service.UserService;
import com.trygym.solution.validator.UserValidator;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class UserController {
@Autowired
private UserService userService;

@Autowired
private SecurityService securityService;

@Autowired
private UserValidator userValidator;

@RequestMapping(value = "/forget_password", method = RequestMethod.POST)
public String forget_password(Model model) {
    //model.addAttribute("userForm", new User());

    return "forget_password";
}

@RequestMapping(value = "/registration", method = RequestMethod.GET)
public String registration(Model model) {
    model.addAttribute("userForm", new User());

    return "registration";
}

@RequestMapping(value = "/registration", method = RequestMethod.POST)
public String registration(@ModelAttribute("userForm") User userForm, BindingResult bindingResult, Model model) {
    userValidator.validate(userForm, bindingResult);

    if (bindingResult.hasErrors()) {
        return "registration";
    }

    userService.save(userForm);

    securityService.autologin(userForm.getUsername(), userForm.getPasswordConfirm());

    return "redirect:/welcome";
}

@RequestMapping(value = "/login", method = RequestMethod.GET)
public String login(Model model, String error, String logout) {
    if (error != null)
        model.addAttribute("error", "Your username and password is invalid.");

    if (logout != null)
        model.addAttribute("message", "You have been logged out successfully.");

    return "login";
}

@RequestMapping(value = {"/", "/welcome"}, method = RequestMethod.GET)
public String welcome(Model model) {
    return "welcome";
}

---

}这里的问题是

HomeController.home

和

UserController.welcome

都映射到

/

，Spring无法确定访问端点时调用哪个方法。从一个方法中删除映射可以解决此特定问题。

您对安全配置所做的更改以及异常的确切消息将有助于此HTTP状态500-请求处理失败；嵌套异常是java.lang.IllegalStateException:映射到HTTP路径“”的不明确处理程序方法：{public java.lang.String com.trygym.solution.web.UserController.welcome（org.springframework.ui.Model），private java.lang.String com.trygym.solution.web.HomeController.home（java.util.Locale，org.springframework.ui.Model）}。这是我得到的错误，之前我在安全配置文件

和

中得到了这个错误。在错误消息中，看起来您将这两个方法（欢迎和主页）映射到了路径。我不太确定安全配置会如何影响这一点，虽然这与hibernate无关，但与Spring无关。Spring似乎发现一条路径映射到两个不同的端点，而Spring不知道在访问端点时实际调用哪个方法。在本例中，这似乎是它所在的根路径（
“/”
）。您将welcome和home映射到相同的路径和请求方法。这是不受支持的。您真的希望welcome映射到
/
？如果是，原因是什么。