@Component
public class AuthenticationFailureHandler extends SimpleUrlAuthenticationFailureHandler {

    @Override
    public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException exception) throws IOException, ServletException {
        response.sendError(HttpServletResponse.SC_UNAUTHORIZED,
                "认证失败啦");
        // super.onAuthenticationFailure(request, response, exception);
    }
}

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable().authorizeRequests()
                .antMatchers("/").permitAll()
                .antMatchers(HttpMethod.POST, "/login").permitAll()
                .antMatchers("/test").permitAll()
                .anyRequest().authenticated()
                .and()
                .addFilterBefore(new LoginFilter("/login", authenticationManager()),
                        UsernamePasswordAuthenticationFilter.class)
                .addFilterBefore(new AuthenticationFilter(),
                        UsernamePasswordAuthenticationFilter.class)
                .formLogin()
                .failureHandler(authenticationFailureHandler);
    }

  @CrossOrigin(origins = "http://localhost:4200")
    @RequestMapping(value = "/login", method = RequestMethod.POST)

import { Component, OnInit } from '@angular/core';
import { HttpClient, HttpHeaders } from "@angular/common/http";

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
  title = 'app';
  results = '';
  constructor(private http: HttpClient){
  }
  ngOnInit(): void {

    let body       = {"username":"user","password":"123"};
    //let options    = { headers: new HttpHeaders({ 'Content-Type': 'application/json' }) };

    this.http.post('http:/localhost:8080/auth/login', body)
      .subscribe(data => {
      console.log(data);
      }
    );
  }
}

<groupId>com.example</groupId>
<artifactId>demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>springboot-security-jwt</name>
<description>Demo project for Spring Boot</description>

<parent>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-starter-parent</artifactId>
	<version>1.5.2.RELEASE</version>
	<relativePath /> <!-- lookup parent from repository -->
</parent>

<properties>
	<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
	<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
	<java.version>1.8</java.version>
</properties>

<dependencies>
	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-web</artifactId>
	</dependency>
	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-security</artifactId>
	</dependency>
	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-data-jpa</artifactId>
	</dependency>
	<dependency>
		<groupId>io.jsonwebtoken</groupId>
		<artifactId>jjwt</artifactId>
		<version>0.7.0</version>
	</dependency>

	<dependency>
		<groupId>joda-time</groupId>
		<artifactId>joda-time</artifactId>
	</dependency>
	<dependency>
		<groupId>com.h2database</groupId>
		<artifactId>h2</artifactId>
		<scope>runtime</scope>
	</dependency>

	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-devtools</artifactId>
		<optional>true</optional>
	</dependency>

	<dependency>
		<groupId>org.webjars.bower</groupId>
		<artifactId>angular</artifactId>
		<version>1.6.4</version>
	</dependency>
	<dependency>
		<groupId>org.webjars.bower</groupId>
		<artifactId>angular-cookies</artifactId>
		<version>1.6.4</version>
	</dependency>
	<dependency>
		<groupId>org.webjars.bower</groupId>
		<artifactId>angular-route</artifactId>
		<version>1.6.4</version>
	</dependency>
	<dependency>
		<groupId>org.webjars</groupId>
		<artifactId>bootstrap</artifactId>
		<version>3.3.7</version>
	</dependency>

	<dependency>
		<groupId>org.webjars.bower</groupId>
		<artifactId>jquery</artifactId>
		<version>1.11.1</version>
	</dependency>

	<dependency>
		<groupId>org.webjars.bower</groupId>
		<artifactId>material-design-lite</artifactId>
		<version>1.3.0</version>
	</dependency>

	<dependency>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-test</artifactId>
		<scope>test</scope>
	</dependency>
	<dependency>
		<groupId>io.rest-assured</groupId>
		<artifactId>spring-mock-mvc</artifactId>
		<version>3.0.0</version>
		<scope>test</scope>
	</dependency>
</dependencies>

<build>
	<plugins>
		<plugin>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-maven-plugin</artifactId>
		</plugin>
	</plugins>
</build>