SpringSecurity使用json登录

主要是重写attemptAuthentication方法

导入依赖

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

相关配置和代码

1. application.properties配置密码

   spring.security.user.name=admin
   spring.security.user.password=123
   

2. 创建自定义身份过滤类

3. 写json登录之前先看一下源码，了解一下它是如何表单登录的

   1. 在idea连按下shift键，搜索UsernamePasswordAuthenticationFilter类

      

   2. 进入后再按Ctrl+F12可以查看该类的所有方法

   

   3. 进入方法

   

   4. 我们只需要在request.getParameter（）那里重写一下不就可以实现json登陆

   重写attemptAuthentication(HttpServletRequestrequest,HttpServletResponseresponse)方法

   只需要复制父类的方法，多加一个判断json的方法。就能同时支持key-value形式可json形式的参数了

   

public class MyAuthenticationFilter extends UsernamePasswordAuthenticationFilter {
    @Override
    public Authentication attemptAuthentication(HttpServletRequest request, HttpServletResponse response) throws AuthenticationException {
        if(!request.getMethod().equals("POST")){
            throw new AuthenticationServiceException("Authentication method not supported" + request.getMethod());
        }
        //说明是以json的形式传递参数
        if (request.getContentType().equals(MediaType.APPLICATION_JSON_VALUE)) {
            String username = null;
            String password = null;
            //将传入的json数据转换成map再通过get("key")获得
            try {
                Map<String,String> map =new ObjectMapper().readValue(request.getInputStream(),
                        Map.class);
                username = map.get("username");
                password = map.get("password");
            } catch (IOException e) {
                e.printStackTrace();
            }

            if (username == null) {

            }
            if (password == null) {

            }
            username = username.trim();
            UsernamePasswordAuthenticationToken authRequest =
                    new UsernamePasswordAuthenticationToken(username, password);
            setDetails(request, authRequest);

            return this.getAuthenticationManager().authenticate(authRequest);
        }

        return super.attemptAuthentication(request, response);
    }
}

创建SecurityConfig配置类

注：自定义的过滤类和security原来那个表单登陆过滤设置是分开的

体现在filter.setFilterProcessesUrl（）和loginProcessingUrl

因此表单登陆和json登陆的，successHandler判断也要分开写，

一会下面有效果图也可以印证这一点

@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
                .anyRequest().authenticated()
                .and()
                .formLogin()
                .loginProcessingUrl("/doLogin")
                .permitAll()
                .and()
                .csrf().disable();
        //将自定义的过滤器加进来，第二参数表示加到usernamePasswordAuthenticationFilter所在的位置
        http.addFilterAt(myAuthenticationFilter(), UsernamePasswordAuthenticationFilter.class);
    }

    @Bean
    MyAuthenticationFilter myAuthenticationFilter() throws Exception{
        MyAuthenticationFilter filter = new MyAuthenticationFilter();
        filter.setAuthenticationManager(authenticationManagerBean());
        return filter;

    }
}

创建Controller

@RestController
public class HelloController {
    @GetMapping("/hello")
    public String hello(){
        return "hello security";
    }
}