java - 反射机制会破坏Java的安全性吗？请解释

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我听说反射机制破坏了Java的安全性。有人可以解释一下吗？

最佳答案

您可以使用反射访问私有字段和对象的方法

例如

public class Foo {

  private String privateString = null;

  public Foo(String privateString) {
    this.privateString = privateString;
  }
}

Foo privateObject = new Foo("The Private Value");

Field privateStringField = Foo.class.
            getDeclaredField("privateString");

privateStringField.setAccessible(true);

String fieldValue = (String) privateStringField.get(privateObject);
System.out.println("fieldValue = " + fieldValue);