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fuintBackend/fuint-utils/src/main/java/com/fuint/exception/Exceptions.java

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+package com.fuint.exception;
+
+import java.io.PrintWriter;
+import java.io.StringWriter;
+
+/**
+ * 关于异常的工具类.
+ *
+ * Created by FSQ
+ * CopyRight https://www.fuint.cn
+ */
+public class Exceptions {
+
+    /**
+     * 将CheckedException转换为UncheckedException.
+     */
+    public static RuntimeException unchecked(Throwable ex) {
+        if (ex instanceof RuntimeException) {
+            return (RuntimeException) ex;
+        } else {
+            return new RuntimeException(ex);
+        }
+    }
+
+    /**
+     * 将ErrorStack转化为String.
+     */
+    public static String getStackTraceAsString(Throwable ex) {
+        StringWriter stringWriter = new StringWriter();
+        ex.printStackTrace(new PrintWriter(stringWriter));
+        return stringWriter.toString();
+    }
+
+    /**
+     * 获取组合本异常信息与底层异常信息的异常描述, 适用于本异常为统一包装异常类，底层异常才是根本原因的情况。
+     */
+    public static String getErrorMessageWithNestedException(Throwable ex) {
+        Throwable nestedException = ex.getCause();
+        return new StringBuilder().append(ex.getMessage()).append(" nested exception is ")
+            .append(nestedException.getClass().getName()).append(":")
+            .append(nestedException.getMessage()).toString();
+    }
+
+    /**
+     * 获取异常的Root Cause.
+     */
+    public static Throwable getRootCause(Throwable ex) {
+        Throwable cause;
+        while ((cause = ex.getCause()) != null) {
+            ex = cause;
+        }
+        return ex;
+    }
+
+    /**
+     * 判断异常是否由某些底层的异常引起.
+     */
+    public static boolean isCausedBy(Exception ex, Class<? extends Exception>... causeExceptionClasses) {
+        Throwable cause = ex;
+        while (cause != null) {
+            for (Class<? extends Exception> causeClass : causeExceptionClasses) {
+                if (causeClass.isInstance(cause)) {
+                    return true;
+                }
+            }
+            cause = cause.getCause();
+        }
+        return false;
+    }
+}