Question

    public void createDirectory(String path) {
        try {
            shellSupport.executeCommand("hadoop fs -mkdir "+path);
            logger.info("Directory "+path+" created successfully");
        } catch(Exception exc) {
            throw exc;
        }
    }

错误

错误：未报告的异常异常;必须被抓住或宣布被抛出

如果我删除了try catch，那么代码编译和logger会显示消息，但是不会创建目录。

Answer 1

仅仅添加：

＆＃xA;＆＃xA;

  public void createDirectory（String path）抛出异常{＆＃xA;试试{＆＃xA; shellSupport.executeCommand（“hadoop fs -mkdir”+ path）;＆＃xA; logger.info（“目录”+路径+“已成功创建”）;＆＃xA; } catch（Exception exc）{＆＃xA;扔掉;＆＃xA; }＆＃xA;}＆＃xA;

＆＃xA;＆＃xA;

即： public void createDirectory（String path）抛出异常到你的方法

＆＃XA？;

Answer 2

如果要抛出异常，则必须在方法签名中声明它。在您的情况下将是

public void createDirectory(String path) throws Exception

或者你可以在没有投掷的情况下抓住它

try {
    shellSupport.executeCommand("hadoop fs -mkdir "+path);
    logger.info("Directory "+path+" created successfully");
} catch(Exception exc) {
    exc.printStackTrace();
    // handle your exception
}

Java获得未报告的异常

2 个答案: