Examples with StrBuilder cn.hutool.core.text.StrBuilder used on opensource projects

Example 1 with StrBuilder

use of cn.hutool.core.text.StrBuilder in project hutool by looly.

the class CsvParser method readLine.

/**
 * 读取一行数据
 *
 * @return 一行数据
 * @throws IORuntimeException IO异常
 */
private List<String> readLine() throws IORuntimeException {
    final List<String> currentFields = new ArrayList<>(maxFieldCount > 0 ? maxFieldCount : DEFAULT_ROW_CAPACITY);
    final StrBuilder localCurrentField = currentField;
    final char[] localBuf = this.buf;
    // 当前位置
    int localBufPos = bufPos;
    // 前一个特殊分界字符
    int localPreChar = preChar;
    // 拷贝起始位置
    int localCopyStart = copyStart;
    // 拷贝长度
    int copyLen = 0;
    while (true) {
        if (bufLen == localBufPos) {
            if (copyLen > 0) {
                localCurrentField.append(localBuf, localCopyStart, copyLen);
            }
            try {
                bufLen = reader.read(localBuf);
            } catch (IOException e) {
                throw new IORuntimeException(e);
            }
            if (bufLen < 0) {
                // CSV读取结束
                finished = true;
                if (localPreChar == config.fieldSeparator || localCurrentField.hasContent()) {
                    // 剩余部分作为一个字段
                    currentFields.add(localCurrentField.toStringAndReset());
                }
                break;
            }
            // 重置
            localCopyStart = localBufPos = copyLen = 0;
        }
        final char c = localBuf[localBufPos++];
        if (inQuotes) {
            // 引号内，做为内容，直到引号结束
            if (c == config.textDelimiter) {
                // End of quoted text
                inQuotes = false;
            } else {
                if ((c == CharUtil.CR || c == CharUtil.LF) && localPreChar != CharUtil.CR) {
                    lineNo++;
                }
            }
            copyLen++;
        } else {
            if (c == config.fieldSeparator) {
                // 一个字段结束
                if (copyLen > 0) {
                    localCurrentField.append(localBuf, localCopyStart, copyLen);
                    copyLen = 0;
                }
                currentFields.add(StrUtil.unWrap(localCurrentField.toStringAndReset(), config.textDelimiter));
                localCopyStart = localBufPos;
            } else if (c == config.textDelimiter) {
                // 引号开始
                inQuotes = true;
                copyLen++;
            } else if (c == CharUtil.CR) {
                if (copyLen > 0) {
                    localCurrentField.append(localBuf, localCopyStart, copyLen);
                }
                currentFields.add(StrUtil.unWrap(localCurrentField.toStringAndReset(), config.textDelimiter));
                localPreChar = c;
                localCopyStart = localBufPos;
                break;
            } else if (c == CharUtil.LF) {
                if (localPreChar != CharUtil.CR) {
                    if (copyLen > 0) {
                        localCurrentField.append(localBuf, localCopyStart, copyLen);
                    }
                    currentFields.add(StrUtil.unWrap(localCurrentField.toStringAndReset(), config.textDelimiter));
                    localPreChar = c;
                    localCopyStart = localBufPos;
                    break;
                }
                localCopyStart = localBufPos;
            } else {
                copyLen++;
            }
        }
        localPreChar = c;
    }
    // restore fields
    bufPos = localBufPos;
    preChar = localPreChar;
    copyStart = localCopyStart;
    return currentFields;
}

Example 2 with StrBuilder

use of cn.hutool.core.text.StrBuilder in project hutool by looly.

the class HttpUtil method encodeParams.

/**
 * 对URL参数做编码，只编码键和值<br>
 * 提供的值可以是url附带编码，但是不能只是url
 *
 * @param paramsStr url参数，可以包含url本身
 * @param charset 编码
 * @return 编码后的url和参数
 * @since 4.0.1
 */
public static String encodeParams(final String paramsStr, Charset charset) {
    if (StrUtil.isBlank(paramsStr)) {
        return StrUtil.EMPTY;
    }
    // url部分，不包括问号
    String urlPart = null;
    // 参数部分
    String paramPart;
    int pathEndPos = paramsStr.indexOf('?');
    if (pathEndPos > -1) {
        // url + 参数
        urlPart = StrUtil.subPre(paramsStr, pathEndPos);
        paramPart = StrUtil.subSuf(paramsStr, pathEndPos + 1);
        if (StrUtil.isBlank(paramPart)) {
            // 无参数，返回url
            return urlPart;
        }
    } else {
        // 无URL
        paramPart = paramsStr;
    }
    final StrBuilder builder = StrBuilder.create(paramPart.length() + 16);
    final int len = paramPart.length();
    String name = null;
    // 未处理字符开始位置
    int pos = 0;
    // 当前字符
    char c;
    // 当前字符位置
    int i;
    for (i = 0; i < len; i++) {
        c = paramPart.charAt(i);
        if (c == '=') {
            // 键值对的分界点
            if (null == name) {
                // 只有=前未定义name时被当作键值分界符，否则做为普通字符
                name = (pos == i) ? StrUtil.EMPTY : paramPart.substring(pos, i);
                pos = i + 1;
            }
        } else if (c == '&') {
            // 参数对的分界点
            if (pos != i) {
                if (null == name) {
                    // 对于像&a&这类无参数值的字符串，我们将name为a的值设为""
                    name = paramPart.substring(pos, i);
                    builder.append(encode(name, charset)).append('=');
                } else {
                    builder.append(encode(name, charset)).append('=').append(encode(paramPart.substring(pos, i), charset)).append('&');
                }
                name = null;
            }
            pos = i + 1;
        }
    }
    // 结尾处理
    if (null != name) {
        builder.append(encode(name, charset)).append('=');
    }
    if (pos != i) {
        if (null == name) {
            builder.append('=');
        }
        builder.append(encode(paramPart.substring(pos, i), charset));
    }
    int lastIndex = builder.length() - 1;
    if ('&' == builder.charAt(lastIndex)) {
        builder.delTo(lastIndex);
    }
    return StrUtil.isBlank(urlPart) ? builder.toString() : urlPart + "?" + builder.toString();
}

Example 3 with StrBuilder

use of cn.hutool.core.text.StrBuilder in project hutool by looly.

the class HttpUtil method urlWithForm.

/**
 * 将表单数据字符串加到URL中（用于GET表单提交）
 *
 * @param url URL
 * @param queryString 表单数据字符串
 * @param charset 编码
 * @param isEncode 是否对键和值做转义处理
 * @return 拼接后的字符串
 */
public static String urlWithForm(String url, String queryString, Charset charset, boolean isEncode) {
    if (StrUtil.isBlank(queryString)) {
        // 无额外参数
        if (StrUtil.contains(url, '?')) {
            // url中包含参数
            return isEncode ? encodeParams(url, charset) : url;
        }
        return url;
    }
    // 始终有参数
    final StrBuilder urlBuilder = StrBuilder.create(url.length() + queryString.length() + 16);
    int qmIndex = url.indexOf('?');
    if (qmIndex > 0) {
        // 原URL带参数，则对这部分参数单独编码（如果选项为进行编码）
        urlBuilder.append(isEncode ? encodeParams(url, charset) : url);
        if (false == StrUtil.endWith(url, '&')) {
            // 已经带参数的情况下追加参数
            urlBuilder.append('&');
        }
    } else {
        // 原url无参数，则不做编码
        urlBuilder.append(url);
        if (qmIndex < 0) {
            // 无 '?' 追加之
            urlBuilder.append('?');
        }
    }
    urlBuilder.append(isEncode ? encodeParams(queryString, charset) : queryString);
    return urlBuilder.toString();
}

Example 4 with StrBuilder

use of cn.hutool.core.text.StrBuilder in project hutool by looly.

the class BeanPath method init.

/**
 * 初始化
 *
 * @param expression 表达式
 */
private void init(String expression) {
    List<String> localPatternParts = new ArrayList<>();
    int length = expression.length();
    final StrBuilder builder = StrUtil.strBuilder();
    char c;
    // 下标标识符开始
    boolean isNumStart = false;
    for (int i = 0; i < length; i++) {
        c = expression.charAt(i);
        if (0 == i && '$' == c) {
            // 忽略开头的$符，表示当前对象
            isStartWith$ = true;
            continue;
        }
        if (ArrayUtil.contains(expChars, c)) {
            // 处理边界符号
            if (CharUtil.BRACKET_END == c) {
                // 中括号（数字下标）结束
                if (false == isNumStart) {
                    throw new IllegalArgumentException(StrUtil.format("Bad expression '{}':{}, we find ']' but no '[' !", expression, i));
                }
                isNumStart = false;
                // 中括号结束加入下标
                if (builder.length() > 0) {
                    localPatternParts.add(unWrapIfPossible(builder));
                }
                builder.reset();
            } else {
                if (isNumStart) {
                    // 非结束中括号情况下发现起始中括号报错（中括号未关闭）
                    throw new IllegalArgumentException(StrUtil.format("Bad expression '{}':{}, we find '[' but no ']' !", expression, i));
                } else if (CharUtil.BRACKET_START == c) {
                    // 数字下标开始
                    isNumStart = true;
                }
                // 每一个边界符之前的表达式是一个完整的KEY，开始处理KEY
                if (builder.length() > 0) {
                    localPatternParts.add(unWrapIfPossible(builder));
                }
                builder.reset();
            }
        } else {
            // 非边界符号，追加字符
            builder.append(c);
        }
    }
    // 末尾边界符检查
    if (isNumStart) {
        throw new IllegalArgumentException(StrUtil.format("Bad expression '{}':{}, we find '[' but no ']' !", expression, length - 1));
    } else {
        if (builder.length() > 0) {
            localPatternParts.add(unWrapIfPossible(builder));
        }
    }
    // 不可变List
    this.patternParts = Collections.unmodifiableList(localPatternParts);
}

Example 5 with StrBuilder

use of cn.hutool.core.text.StrBuilder in project hutool by looly.

the class PinyinUtil method getAllFirstLetter.

/**
 * 获取所给中文的每个汉字首字母组成首字母字符串
 * @param chinese 汉字字符串
 * @return 首字母字符串
 */
public static String getAllFirstLetter(String chinese) {
    if (StrUtil.isBlank(chinese)) {
        return StrUtil.EMPTY;
    }
    int len = chinese.length();
    final StrBuilder strBuilder = new StrBuilder(len);
    for (int i = 0; i < len; i++) {
        strBuilder.append(getFirstLetter(chinese.charAt(i)));
    }
    return strBuilder.toString();
}