SpringBoot framework: Admin

Admin Login

Build the login page and the page Admin
- Admin Home: According to the background page design blog list manager to manage
- Administrator login page: Semantic UIthe official website login form layout options there, you can write directly shining

UserServicewithUserRespository

In com.xxxcase a new package servicebag, used to store documents related to the service logic processing

Called a new UserServiceinterface file ( Interface), the user interface definition services

package com.skgxsn.blog_idea2017.service;

import com.skgxsn.blog_idea2017.po.User;

public interface UserService {

    User checkUser(String username, String password);
}

Implements the interface with the new package UserServiceImpl.javaused to implement the interface

package com.skgxsn.blog_idea2017.service;

import com.skgxsn.blog_idea2017.dao.UserRepository;
import com.skgxsn.blog_idea2017.po.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private UserRepository userRepository;

    @Override
    public User checkUser(String username, String password) {
        User user = userRepository.findByUsernameAndPassword(username, password);
        return user;
    }
}

com.xxxUnder the new package bag daofor interaction database, this new packet UserRespositoryinterface:

package com.skgxsn.blog_idea2017.dao;

import com.skgxsn.blog_idea2017.po.User;
import org.springframework.data.jpa.repository.JpaRepository;

public interface UserRepository extends JpaRepository<User, Long> {

    User findByUsernameAndPassword(String username, String password);
}

LoginControllerRealization landing

webPackage under the new adminpackage, under the new LoginContorller.java, to achieve the administrator login:

package com.skgxsn.blog_idea2017.web.admin;

import com.skgxsn.blog_idea2017.po.User;
import com.skgxsn.blog_idea2017.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;

@Controller
@RequestMapping("/admin")
public class LoginController {

    @Autowired
    private UserService userService;

    @GetMapping
    public String loginPage() {
        return "admin/login";
    }

    @PostMapping("/login")
    public String login(@RequestParam String username,
                        @RequestParam String password,
                        HttpSession session,
                        RedirectAttributes attributes) {
        User user = userService.checkUser(username, password);
        if (user != null) {
            user.setPassword(null);
            session.setAttribute("user", user);
            return "admin/index";
        }else {
            attributes.addFlashAttribute ( "the Message", "user name and password error" );
             return "redirect: / ADMIN" ;
        }
    }

    @GetMapping("/logout")
    public String logout(HttpSession session) {
        session.removeAttribute("user");
        return "redirect:/admin";
    }
}

In login.htmladding the login error message:

<div class="ui error mini message"></div>
                    <div class="ui negative mini message" th:unless="${#strings.isEmpty(#messages)}" th:text="${#messages}">用户名或密码错误</div>

Define script:

<script>
    $('.ui.form').form({
        fields : {
            username : {
                indentifier:'username',
                rules: [{
                    type : 'empty',
                    prompt: " Please enter your user name ' ,
                }]
            },
            password : {
                indentifier:'password',
                rules: [{
                    type : 'empty',
                    prompt: " Please enter your password ' ,
                }]
            }
        }
    })
</script>

MD5encryption

In com.xxxthe new packet at Utilthe packet for storing tools, a new MD5Utils.javaset encryption:

package com.skgxsn.blog_idea2017.util;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public  class MD5Utils {

    /**
     * MD5 encryption class
     * @Param str string to be encrypted
     * @Return     after a few meters string
      * / 
    public  static String code (STR String) {
         the try {
            MessageDigest md = MessageDigest.getInstance("MD5");
            md.update(str.getBytes());
            byte[] byteDigest = md.digest();
            int i;
            StringBuffer buf = new StringBuffer("");
            for (int offset = 0; offset < byteDigest.length; offset++) {
                i = byteDigest[offset];
                if (i < 0)
                    i += 256;
                if (i < 16)
                    buf.append("0");
                buf.append(Integer.toHexString(i));
            }
            // 32-bit encryption 
            return buf.toString ();
             // 16-bit encryption
 //             return buf.toString () the substring (. 8, 24);. 
        } The catch (NoSuchAlgorithmException E) {
            e.printStackTrace ();
            return null;
        }
    }

    public static void main(String[] args) {
        System.out.println(code("123456"));
    }
}

In UserServiceImpl.javathe UserCheckread reference time pass method MD5Utils.code(password)can be implemented MD5encryption

Log interceptor

In order to prevent people know the contents of your project management can be easily blog landing page, so to add a logon interceptor, set user filter

In com.xxx.erb.admincase a new package BlogController:

package com.skgxsn.blog_idea2017.web.admin;


import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/admin")
public class BlogController {

    @GetMapping("/blog-list")
    public String blogList() {
        return "admin/blog-list";
    }
}

In com.xxxthe new package under the package Interceptorpackage, build LoginInterceptor.java, WecConfig.javafile is used to set the specific implementation of interceptor landing:

// LoginInterceptor.java
package com.skgxsn.blog_idea2017.Interceptor;

import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginInterceptor extends HandlerInterceptorAdapter {

    @Override
    public boolean preHandle(HttpServletRequest request,
                             HttpServletResponse response,
                             Object handler) throws Exception {

        if (request.getSession().getAttribute("user") == null) {
            response.sendRedirect("/admin");
            return false;
        }
        return true;
    }
}


//WecConfig.java
package com.skgxsn.blog_idea2017.Interceptor;

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor ( new LoginInterceptor ())
                .addPathPatterns("/admin/**")
                .excludePathPatterns("/admin")
                .excludePathPatterns("/admin/login");
    }
}