Websecurityconfigureradapter cannot be resolved to a type

Explanation

The error message “websecurityconfigureradapter cannot be resolved to a type” indicates that the class WebSecurityConfigurerAdapter is not recognized by the compiler. This typically happens when the required import statement is missing or when the necessary dependencies are not properly included in the project.

Solution:

1. First, make sure you have the necessary dependencies added to your project. If you are using a build tool like Maven or Gradle, check that the required dependencies are specified in your project file.
2. Make sure you have the correct import statement for the WebSecurityConfigurerAdapter class. The import statement should be:

import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;

Here is an example of a simple Spring Security configuration class that extends WebSecurityConfigurerAdapter:

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
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;

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

  @Override
  protected void configure(HttpSecurity http) throws Exception {
    http
      .authorizeRequests()
        .antMatchers("/public/**").permitAll()
        .anyRequest().authenticated()
        .and()
      .formLogin()
        .loginPage("/login")
        .permitAll()
        .and()
      .logout()
        .permitAll();
  }

  @Autowired
  public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
    auth
      .inMemoryAuthentication()
        .withUser("user").password("{noop}password").roles("USER");
  }
}

In this example, the SecurityConfig class extends WebSecurityConfigurerAdapter and provides the necessary configurations for Spring Security. The configure method is used to define access rules and login/logout settings, while the configureGlobal method is used to configure the authentication provider (in this case, an in-memory user). Make sure to import the required classes and customize the configurations according to your specific needs.