import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;
public class HttpClientExample {
public static void main(String[] args) {
CloseableHttpClient httpClient = HttpClients.createDefault();
HttpGet httpGet = new HttpGet("http://api.example.com");
try {
CloseableHttpResponse response = httpClient.execute(httpGet);
String responseBody = EntityUtils.toString(response.getEntity());
System.out.println(responseBody);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
httpClient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
import org.springframework.jdbc.core.JdbcTemplate;
import javax.sql.DataSource;
public class SpringJDBCExample {
private JdbcTemplate jdbcTemplate;
public SpringJDBCExample(DataSource dataSource) {
this.jdbcTemplate = new JdbcTemplate(dataSource);
}
public void queryData() {
String sql = "SELECT * FROM users";
List<Map<String, Object>> rows = jdbcTemplate.queryForList(sql);
for (Map<String, Object> row : rows) {
System.out.println(row.get("name"));
}
}
}
@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
public void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
auth.inMemoryAuthentication()
.withUser("admin").password("{noop}admin").roles("ADMIN")
.and()
.withUser("user").password("{noop}user").roles("USER");
}
@Override
protected void configure(HttpSecurity http) throws Exception {
http.authorizeRequests()
.antMatchers("/admin/**").hasRole("ADMIN")
.antMatchers("/user/**").hasAnyRole("ADMIN", "USER")
.and().formLogin();
}
}
