java全角与半角标点符号相互转换详解

package com.dhb.springbootdata;
public class AsciiUtil {
	public static final char SBC_SPACE = 12288; // 全角空格 12288
	public static final char DBC_SPACE = 32; //半角空格 32
	// ASCII character 33-126 <-> unicode 65281-65374
	public static final char ASCII_START = 33;
	public static final char ASCII_END = 126;
	public static final char UNICODE_START = 65281;
	public static final char UNICODE_END = 65374;
	public static final char DBC_SBC_STEP = 65248; // 全角半角转换间隔
	public static char sbc2dbc(char src) {
		if (src == SBC_SPACE) {
			return DBC_SPACE;
		}
		if (src >= UNICODE_START && src <= UNICODE_END) {
			return (char) (src - DBC_SBC_STEP);
		}
		return src;
	}
	/**
	 * Convert from SBC case to DBC case
	 *
	 * @param src
	 * @return DBC case
	 */
	public static String sbc2dbcCase(String src) {
		if (src == null) {
			return null;
		}
		char[] c = src.toCharArray();
		for (int i = 0; i < c.length; i++) {
			c[i] = sbc2dbc(c[i]);
		}
		return new String(c);
	}
	public static char dbc2sbc(char src) {
		if (src == DBC_SPACE) {
			return SBC_SPACE;
		}
		if (src <= ASCII_END) {
			return (char) (src + DBC_SBC_STEP);
		}
		return src;
	}
	/**
	 * Convert from DBC case to SBC case.
	 *
	 * @param src
	 * @return SBC case string
	 */
	public static String dbc2sbcCase(String src) {
		if (src == null) {
			return null;
		}
		char[] c = src.toCharArray();
		for (int i = 0; i < c.length; i++) {
			c[i] = dbc2sbc(c[i]);
		}
		return new String(c);
	}
	public static void main(String[] args) {
		System.out.println(AsciiUtil.sbc2dbcCase("你好（张三）111？！"));
		System.out.println(AsciiUtil.dbc2sbcCase("你好(张三)111?!"));
		Character.MIN_VALUE
	}
}