Question

如何在此代码中获取一些信息（列，行，消息）？

String xhtml = "<html><body><p>Hello, world!<p></body></html>";
ValidationResponse response = new ValidatorBuilder().html().validate(xhtml);
if (!response.valid()) 
{
    Set<Defect> errors = response.errors();
    //... what write at this place?
    System.out.println(errors[0].column() + " " + errors[0].source());
}

我试着写作：

String xhtml = "<html><body><p>Hello, world!<p></body></html>";
ValidationResponse response = new ValidatorBuilder().html().validate(xhtml);
 if (!response.valid()) 
 {
     Set<Defect> errors = response.errors();
     Defect[] errorsArray = (Defect[]) errors.toArray();
     System.out.println(errorsArray[0].column() + " " + errorsArray[0].source());
 }

但是得到例外：

线程中的异常＆＃34; main＆＃34; java.lang.ClassCastException：[Ljava.lang.Object;无法投射到[Lcom.rexsl.w3c.Defect; 在HTMLValidator.main（HTMLValidator.java:17）

Answer 1

toArray()返回Object[]。如果您需要Defect[]，则应使用重载版本：

String xhtml = "<html><body><p>Hello, world!<p></body></html>";
ValidationResponse response = new ValidatorBuilder().html().validate(xhtml);
if (!response.valid()) 
{
    Set<Defect> errors = response.errors();
    Defect[] errorsArray = errors.toArray(new Defect[errors.size()]);
    System.out.println(errorsArray[0].column() + " " + errorsArray[0].source());
}

如何从w3c验证器</defect>中的Set <defect>获取一些信息

1 个答案: