再開始第三節之前，先補充一下第二節裏出現的小問題，就是springboot的application.properties，我在文件中添加了server.port=9090這個參數，但是啟動項目後並未生效，檢查了一下原因，是因為未讀取到該文件，這裏可以通過buildpath添加source文件夾解決，如下圖：

好了，我們一起開始第三節：

這一節我們來擴展我們的應用程序，在pom文件中添加以下依賴：

<dependency>
　　<groupId>org.springframework.boot</groupId>
　　<artifactId>spring-boot-starter-security</artifactId>
</dependency>

運行項目，打開之前的頁面地址，發現進入了一個登錄頁面，如下圖：

用戶名為user，密碼在eclipse的控制臺可以看到，如下圖：

輸入之後登錄成功，就可以正常訪問頁面了。

但這樣肯定不能滿足我們的需求，所以我們需要創建自定義的安全配置，

1、擴展WebSecurityConfigurerAdapter配置類：

package com.dota.herolist.security;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.provisioning.InMemoryUserDetailsManager;

import com.dota.herolist.repository.UserRepository;
@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter{
　　@Autowired
　　private UserRepository userRepository;
　　@Override
　　protected void configure(HttpSecurity http) throws Exception{
　　　　http.authorizeRequests()
　　　　.antMatchers("/heroList/**").hasRole("player")//查看該路徑必須擁有player角色
　　　　.and()
　　　　.formLogin().loginPage("/login").failureUrl("/login?error=true");

　　}
　　@Bean
　　@Override
　　public UserDetailsService userDetailsService() {
　　　　UserDetails user =
　　　　　　User.withDefaultPasswordEncoder()
　　　　　　.username("user")
　　　　　　.password("password")
　　　　　　.roles("player")
　　　　　　.build();

　　　　　　return new In　MemoryUserDetailsManager(user);
　　}
}

2、定義User實體的JPA實體

package com.dota.herolist.entity;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import javax.persistence.Entity;
import javax.persistence.Id;

import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;

@Entity
public class User implements UserDetails{
private static final long serialVersionUID = 1L;
@Id
private String username;
private String password;

public User(String username,String password){
this.username = username;
this.password = password;
}

public User() {
// TODO Auto-generated constructor stub
}

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;
}
@Override
public Collection<? extends GrantedAuthority> getAuthorities() {
List<SimpleGrantedAuthority> list=new ArrayList<SimpleGrantedAuthority>();
list.add(new SimpleGrantedAuthority("player"));
return list;
}

@Override
public boolean isAccountNonExpired() {
// TODO Auto-generated method stub
return true;
}
@Override
public boolean isAccountNonLocked() {
// TODO Auto-generated method stub
return true;
}
@Override
public boolean isCredentialsNonExpired() {
// TODO Auto-generated method stub
return true;
}
@Override
public boolean isEnabled() {
// TODO Auto-generated method stub
return true;
}
}

3、添加controller層：

package com.dota.herolist.controller;

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

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

4、添加html頁面：

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xmlns:th="http://www.thymeleaf.org"
xmlns:sec="http://www.thymeleaf.org/thymeleaf-extras-springsecurity3">
<head>
<title>dota hero </title>
</head>
<body>
<div th:if="${param.error}">
Invalid username and password.
</div>
<div th:if="${param.logout}">
You have been logged out.
</div>
<form th:action="@{/login}" method="post">
<div><label> User Name : <input type="text" name="username"/> </label></div>
<div><label> Password: <input type="password" name="password"/> </label></div>
<div><input type="submit" value="Sign In"/></div>
</form>
</body>
</html>

啟動項目，

輸入user,password登錄成功。下一章我們將展示如何連接數據庫進行安全認證。

springboot從入門到精通（三）