我在以前的代码中发现了另一种方法和一些错误。
错误01
已为创建bean示例 ClientCredentialsResourceDetails 但我用的是 password flow .
我会把我的答案贴出来 access_token 响应使用 password flow 在 OAUTH2 .
应用程序.yml

security:
  oauth2:
    access-token-uri: http://localhost:9098/oauth/token
    client-id: web
    client-secret: 14292
    grant-type: password

属性类

@ConfigurationProperties(prefix = "security")
public class SecurityProperties {

    private OAuth2Properies oauth2;

    public OAuth2Properies getOauth2() {
        return oauth2;
    }

    public void setOauth2(OAuth2Properies oauth2) {
        this.oauth2 = oauth2;
    }

    public static class OAuth2Properies{

        private String accessTokenUri;
        private String clientId;
        private String clientSecret;
        private String grantType;

        public String getAccessTokenUri() {
            return accessTokenUri;
        }

        public void setAccessTokenUri(String accessTokenUri) {
            this.accessTokenUri = accessTokenUri;
        }

        public String getClientId() {
            return clientId;
        }

        public void setClientId(String clientId) {
            this.clientId = clientId;
        }

        public String getClientSecret() {
            return clientSecret;
        }

        public void setClientSecret(String clientSecret) {
            this.clientSecret = clientSecret;
        }

        public String getGrantType() {
            return grantType;
        }

        public void setGrantType(String grantType) {
            this.grantType = grantType;
        }
    }
}

customeauthenticationprovider类

@Component
@EnableConfigurationProperties(SecurityProperties.class)
public class Oauth2AuthenticationProvider {

    private SecurityProperties securityProperties;

    public Oauth2AuthenticationProvider(SecurityProperties securityProperties)
    {
        this.securityProperties=securityProperties;
    }

    public OAuth2AccessToken obtainToken(String username, String password) {

        SecurityProperties.OAuth2Properies oAuthDetails=securityProperties.getOauth2();

        ResourceOwnerPasswordResourceDetails resourceDetails = new ResourceOwnerPasswordResourceDetails();
        resourceDetails.setAccessTokenUri(oAuthDetails.getAccessTokenUri());
        resourceDetails.setClientId(oAuthDetails.getClientId());
        resourceDetails.setClientSecret(oAuthDetails.getClientSecret());
        resourceDetails.setGrantType(oAuthDetails.getGrantType());
        resourceDetails.setUsername(username);
        resourceDetails.setPassword(password);
        DefaultAccessTokenRequest defaultAccessTokenRequest = new DefaultAccessTokenRequest();

        OAuth2AccessToken token;

        try {
            token = new ResourceOwnerPasswordAccessTokenProvider().obtainAccessToken(resourceDetails, defaultAccessTokenRequest);
        } catch (OAuth2AccessDeniedException accessDeniedException) {
            throw new BadCredentialsException("Invalid credentials", accessDeniedException);
        }

        return token;

    }

}

服务等级

@Service
public class UserServiceImpl{

private String getAccessToken(String userName,String password)
{
authenticationProvider.obtainToken(username,password).toString();

}

}