java 数组合并（一维，二维横向，二维纵向）

// 一维数组合并
	private static String[] getMergeArray(String[] al, String[] bl) {
		String[] a = al;
		String[] b = bl;
		String[] c = new String[a.length + b.length];
		System.arraycopy(a, 0, c, 0, a.length);
		System.arraycopy(b, 0, c, a.length, b.length);
		return c;
	}
	
	// 二维数组纵向合并
	private static String[][] unite(String[][] content1, String[][] content2) {
		String[][] newArrey = new String[][] {};
		List<String[]> list = new ArrayList<String[]>();
		list.addAll(Arrays.<String[]> asList(content1));
		list.addAll(Arrays.<String[]> asList(content2));
		return list.toArray(newArrey);
	}

	// 二维数组横向合并
	public static String[][] getMergeArray(String[][] al, String[][] bl) {
		if(al == null || al.length == 0) return bl;
		if(bl == null || bl.length == 0) return al;
		String[][] newArrey = null;
		// 根据数组的长度，判断要补全哪个数组
		if (al.length > bl.length) {
			newArrey = new String[al.length][];
			// 补全较短的数组
			String[][] temps = new String[al.length - bl.length][bl[0].length];
			for (int i = 0; i < temps.length; i++) {
				for (int j = 0; j < temps[0].length; j++)
					temps[i][j] = "";
			}
			String[][] btemp = unite(bl, temps);
			// 合并
			for (int k = 0; k < al.length; k++) {
				newArrey[k] = getMergeArray(al[k], btemp[k]);
			}
		} else {
			newArrey = new String[bl.length][];
			String[][] temps = new String[bl.length - al.length][al[0].length];
			for (int i = 0; i < temps.length; i++) {
				for (int j = 0; j < temps[0].length; j++)
					temps[i][j] = "";
			}
			String[][] atemp = unite(al, temps);
			for (int k = 0; k < bl.length; k++) {
				newArrey[k] = getMergeArray(atemp[k], bl[k]);
			}
		}
		return newArrey;
	}