把中文变成zhongwen

import net.sourceforge.pinyin4j.PinyinHelper;
import net.sourceforge.pinyin4j.format.HanyuPinyinCaseType;
import net.sourceforge.pinyin4j.format.HanyuPinyinOutputFormat;
import net.sourceforge.pinyin4j.format.HanyuPinyinToneType;
import net.sourceforge.pinyin4j.format.HanyuPinyinVCharType;
import net.sourceforge.pinyin4j.format.exception.BadHanyuPinyinOutputFormatCombination;

public class Test {

	//用于存放输出样式的
	private HanyuPinyinOutputFormat outputFormat = new HanyuPinyinOutputFormat();
	
	public Test() {
		outputFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);//大小写的问题
		outputFormat.setVCharType(HanyuPinyinVCharType.WITH_U_AND_COLON);//关于v的显示方式
		outputFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);//关于音标的显示
	}
	
	public static void  main(String args[]) throws BadHanyuPinyinOutputFormatCombination {
		Test test = new Test();
		String result = test.convertToPinYin("中文aaaaabbb.....',；12.3");
		System.out.println(result);
	}
	
	public String convertToPinYin(String str) throws BadHanyuPinyinOutputFormatCombination {
		char[] chars = str.toCharArray();
		StringBuffer result = new StringBuffer();
		for (char c:chars) {
			if (Character.toString(c).matches("[\\u4E00-\\u9FA5]+")) {//表示匹配中文
				//下面的results是表示该中文字所有的拼音，如“中”有"中文”、"相中"两种读法，所以当只需要拼音而不需要知道读第几声时，只需取第一个,多音字需慎重
				String results[] = PinyinHelper.toHanyuPinyinStringArray(c, outputFormat);
				result.append(results[0]);
				//字母和数字直接显示
			} else if (Character.isLetter(c)|| Character.isDigit(c)){
				result.append(c);
			}
		}
		return result.toString();
	}
}