ResolveException.java

package com.banking.xc.utils;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;

public class ResolveException {

	private static String TAG = "ResolveException";
	private static int FRIST_LINE = 3;

	private static String KEYWORD = "com.jingdong";

	public static String resolve(Throwable e) {
		try{
			StringBuffer exceptionString = new StringBuffer();
			
			resolveCause(e, exceptionString, true);

			if (Log.I) {
				Log.i(TAG, "size = " + exceptionString.length());
				Log.i(TAG, exceptionString.toString());
			}

			return exceptionString.toString();
		}catch(Exception ex){
			Writer w = new StringWriter();
			ex.printStackTrace(new PrintWriter(w));
			return w.toString();
		}
		

	}

	private static void resolveCause(Throwable cause, StringBuffer sb, boolean isFirst) {
		if (cause != null) {
			if (!isFirst && cause.getCause() != null) {
				resolveCause(cause.getCause(), sb, false);
			} else {
				sb.append("------" + cause.toString() + "\n");
				StackTraceElement[] stack = cause.getStackTrace();
				int recordLine = -1;

				for (int i = 0; i < stack.length; i++) {
					if (i < FRIST_LINE) {
						addExceptionString(i, stack, sb);
						// if (!isFirst) {
						if (stack[i].getClassName().contains(KEYWORD)) {
							recordLine = FRIST_LINE;
						}
						// }
					} else {

						if (cause.getCause() != null) {// 不是最后一个,则跳出.
							break;
						}

						if (recordLine == -1) {
							if (stack[i].getClassName().contains(KEYWORD)) {
								recordLine = i;
								addExceptionString(i, stack, sb);
							}
						} else {
							if (cause.getCause() == null) {
								if (i >= recordLine) {
									addExceptionString(i, stack, sb);

								}
							}
						}
					}
				}

				if (cause.getCause() != null) {
					resolveCause(cause.getCause(), sb, false);
				} else if (recordLine == -1) {
					if (Log.V) {
						Log.v(TAG, "recordLine == -1recordLine == -1");
					}
					for (int i = (FRIST_LINE - 1); i < stack.length; i++) {
						addExceptionString(i, stack, sb);
					}
				}
			}

		}
	}

	private static void addExceptionString(int index, StackTraceElement[] stack, StringBuffer sb) {
		sb.append(stack[index].getClassName() + "." + stack[index].getMethodName() + "(" + stack[index].getLineNumber() + ")" + "\n");
	}
}