eagle-core/src/main/java/eagle/jfaster/org/util/ExceptionUtil.java
public static String transform(final Throwable cause) {
        if (null == cause) {
            return "";
        }
        StringWriter result = new StringWriter();
        try (PrintWriter writer = new PrintWriter(result)) {
            cause.printStackTrace(writer);
        }
        return result.toString();
    }
public static String transform(final Throwable cause) {
        if (null == cause) {
            return "";
        }
        StringWriter result = new StringWriter();
        try (PrintWriter writer = new PrintWriter(result)) {
            cause.printStackTrace(writer);
        }
        return result.toString();
    }
将Throwable异常转换为字符串.

@param cause 需要转换的异常
@return 转换后的异常字符串