需要jar包

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<dependency>
    <groupId>com.belerweb</groupId>
    <artifactId>pinyin4j</artifactId>
    <version>2.5.1</version>
</dependency>


第一个 ： 汉字转拼音全拼不忽略英文字符

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/**
 * (全拼)中文转拼音 --->不忽略英文字符
 * @param chinese
 * @return
 */
public static String getFullSpell(String chinese) {
    StringBuffer pybf = new StringBuffer();
    char[] arr = chinese.toCharArray();
    HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();
    defaultFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);
    defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
    for (int i = 0; i < arr.length; i++) {
        if (arr[i] > 128) {
            try {
                pybf.append(PinyinHelper.toHanyuPinyinStringArray(arr[i], defaultFormat)[0]);
            } catch (BadHanyuPinyinOutputFormatCombination e) {
                e.printStackTrace();
            }
        } else {
            pybf.append(arr[i]);
        }
    }
    return pybf.toString();
}


第二个 ： 汉字转拼音首字母不忽略英文字符

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/**
 * (首字母)汉字转拼音--->不忽略英文字符
 * @param chinese
 * @return
 */
public static String getFirstSpell(String chinese) {
    StringBuffer pybf = new StringBuffer();
    char[] arr = chinese.toCharArray();
    HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();
    defaultFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);
    defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
    for (int i = 0; i < arr.length; i++) {
        if (arr[i] > 128) {
            try {
                String[] temp = PinyinHelper.toHanyuPinyinStringArray(arr[i], defaultFormat);
                if (temp != null) {
                    pybf.append(temp[0].charAt(0));
                }
            } catch (BadHanyuPinyinOutputFormatCombination e) {
                e.printStackTrace();
            }
        } else {
            pybf.append(arr[i]);
        }
    }
    return pybf.toString().replaceAll("\\W", "").trim();
}


第三个 ： 汉字转拼音全拼忽略英文字符

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/**
 * (全拼)中文转拼音自动--->忽略英文字符
 * @param inputString
 * @return
 */
public static String getFullSpell_WithoutEnglish(String inputString) {
    HanyuPinyinOutputFormat format = new HanyuPinyinOutputFormat();
    format.setCaseType(HanyuPinyinCaseType.LOWERCASE);
    format.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
    format.setVCharType(HanyuPinyinVCharType.WITH_V);
    char[] input = inputString.trim().toCharArray();
    String output = "";
    try {
        for (int i = 0; i < input.length; i++) {
            System.err.println(input[i]);
            if (java.lang.Character.toString(input[i]).matches("[\\u4E00-\\u9FA5]+")) {
                String[] temp = PinyinHelper.toHanyuPinyinStringArray(input[i], format);
                output += temp[0];
            }
        }
    } catch (BadHanyuPinyinOutputFormatCombination e) {
        e.printStackTrace();
    }
    return output;
}


第四个 ： 汉字转拼音首字母忽略英文字符

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/**
 * (首字母)汉字转拼音--->忽略英文字符
 * @param chinese
 * @return
 */
public static String getFirstSpell_WithoutEnglish(String chinese) {
    StringBuffer pybf = new StringBuffer();
    char[] arr = chinese.toCharArray();
    HanyuPinyinOutputFormat defaultFormat = new HanyuPinyinOutputFormat();
    defaultFormat.setCaseType(HanyuPinyinCaseType.LOWERCASE);
    defaultFormat.setToneType(HanyuPinyinToneType.WITHOUT_TONE);
    for (int i = 0; i < arr.length; i++) {
        if (arr[i] > 128) {
            try {
                String[] temp = PinyinHelper.toHanyuPinyinStringArray(arr[i], defaultFormat);
                if (temp != null) {
                    pybf.append(temp[0].charAt(0));
                }
            } catch (BadHanyuPinyinOutputFormatCombination e) {
                e.printStackTrace();
            }
        }
    }
    return pybf.toString().replaceAll("\\W", "").trim();
}