format.java

JAVA+JSP程序系统-华源网络科技论坛

package org.jetic.util;

/**
 * Title:        华源技术论坛
 * Description:
 * Copyright:    Copyright (c) 2001
 * Company:      GBSOURCE
 * @author fainter
 * @version 1.0
 */

public class Format {

    /**
     * 字符串替换，将 source 中的 oldString 全部换成 newString
     *
     * @param source 源字符串
     * @param oldString 老的字符串
     * @param newString 新的字符串
     * @return 替换后的字符串
     */
    public static String Replace(String source, String oldString, String newString) {
        StringBuffer output = new StringBuffer();

        int lengthOfSource = source.length();   // 源字符串长度
        int lengthOfOld = oldString.length();   // 老字符串长度

        int posStart = 0;   // 开始搜索位置
        int pos;            // 搜索到老字符串的位置

        while ((pos = source.indexOf(oldString, posStart)) >= 0) {
            output.append(source.substring(posStart, pos));

            output.append(newString);
            posStart = pos + lengthOfOld;
        }

        if (posStart < lengthOfSource) {
            output.append(source.substring(posStart));
        }

        return output.toString();
    }

    /**
     * 将字符串格式化成 HTML 代码输出
     *
     * @param str 要格式化的字符串
     * @return 格式化后的字符串
     */
    public static String toHtml(String str) {
        String html = str;

        html = Replace(html, "&", "&amp;");
        html = Replace(html, "<", "&lt;");
        html = Replace(html, ">", "&gt;");
        html = Replace(html, "\r\n", "\n");
        html = Replace(html, "\n", "<br>\n");
        html = Replace(html, "\t", "    ");
        html = Replace(html, "  ", " &nbsp;");

        return html;
    }

    /**
	 * 把单引号替换为双单引号,用于MSsql
	 */

    public static String toSql(String sqlstr) {
        String strsql = sqlstr;

        strsql = Replace(strsql, "'", "''");
        return strsql;
    }

}