Java开发中解决Js的跨域问题过程解析

//指定允许其他域名访问
Access-Control-Allow-Origin:http://localhost:8989

response.setHeader("Access-Control-Allow-Origin", "http://localhost:8989");
//第二个参数的意思就是说是哪个地址访问，如果要通配全部，就使用*即可

@CrossOrigin(origins=http://localhost:8080)

@Target({ElementType.TYPE, ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface CrossOrigin {
  @Deprecated
  String[] DEFAULT_ORIGINS = new String[]{"*"};
  @Deprecated
  String[] DEFAULT_ALLOWED_HEADERS = new String[]{"*"};
  @Deprecated
  boolean DEFAULT_ALLOW_CREDENTIALS = false;
  @Deprecated
  long DEFAULT_MAX_AGE = 1800L;

  @AliasFor("origins")
  String[] value() default {};

  @AliasFor("value")
  String[] origins() default {};

  String[] allowedHeaders() default {};

  String[] exposedHeaders() default {};

  RequestMethod[] methods() default {};

  String allowCredentials() default "";

  long maxAge() default -1L;
}

response.setHeader("Access-Control-Allow-Origin", "http://localhost:8989");
response.setHeader("Access-Control-Allow-Credentials", "true");

@CrossOrigin(origins="http://localhost:8989",allowCredentials="true")