public StrBuilder reset() {
		this.position = 0;
		return this;
	}
@Test
	public void resetTest() {
		StrBuilder builder = StrBuilder.create(1);
		builder.append("aaa").append("你好").append('r');
		builder.insert(3, "数据插入");
		builder.reset();
		assertEquals("", builder.toString());
	}