?? stringutil.java
字號:
/**
* 獲得指定表單域的值, 并將單個的 ' 換成 ''; SQL 規則:如果單引號中的字符串包含一個嵌入的引號， 可以使用兩個單引號表示嵌入的單引號。
*/
public String requestSql(HttpServletRequest request, String fieldName) {
return replaceSql(request1(request, fieldName));
}
/**
* 根據 Cookie 名稱得到請求中的 Cookie 值, 需要事先給 _request 一個初始值; 如果 Cookie 值是 null, 則返回 ""
*/
public static String getCookieValue(HttpServletRequest request, String name) {
Cookie[] cookies = request.getCookies();
if (cookies == null) {
return "";
}
for (int i = 0; i < cookies.length; i++) {
Cookie cookie = cookies[i];
if (cookie.getName().equals(name)) {
// 需要對 Cookie 中的漢字進行 URL 反編碼, 適用版本: Tomcat 4.0
return decode(cookie.getValue());
// 不需要反編碼, 適用版本: JSWDK 1.0.1
//return cookie.getValue();
}
}
// A cookie may not return a null value, may return a ""
return "";
}
// 返回指定表單名的數組
public String[] getParameterValues(HttpServletRequest request, String name) {
// POST 方法的參數沒有編碼錯誤
//if (request.getMethod().equalsIgnoreCase("POST")) {
// 文件上傳模式
//if(isUploadMode) {
// return request.getParameterValues(name);
//}
// -- For Tomcat 4.0
//return request.getParameterValues(name);
// -- For JSWDK 1.0.1
/*
* String values[] = _request.getParameterValues(name); if(values !=
* null) { for(int i = 0; i < values.length; i++) { values[i] =
* toChi(values[i]); } } return values;
*/
//}
//else {
// 將通過 GET 方式發送的中文字符解碼(但是必須使用 java.net.URLEncoder 進行中文字符參數的編碼)
// 解碼時需使用內碼轉換, 也可使用反編碼, 即: return decode(_request.getParameter(name));
// 問題: decode() 僅適用于 JDK 1.3 + Tomcat 4.0
String encoding = request.getCharacterEncoding();
if("GBK".equalsIgnoreCase(encoding) || "GB2312".equalsIgnoreCase(encoding)) {
return request.getParameterValues(name);
}
String values[] = request.getParameterValues(name);
if (values != null) {
for (int i = 0; i < values.length; i++) {
values[i] = toChi(values[i]);
}
}
return values;
//}
}
/**
* 刪除指定的 Web 應用程序目錄下所上傳的文件
*
* @param application
* JSP/Servlet 的 ServletContext
* @param filePath
* 相對文件路徑
*/
public static void deleteFile(ServletContext application, String filePath) {
if (!isEmpty(filePath)) {
String physicalFilePath = application.getRealPath(filePath);
if (!isEmpty(physicalFilePath)) {
java.io.File file = new java.io.File(physicalFilePath);
file.delete();
}
}
}
/**
* 在指定的 Web 應用程序目錄下以指定路徑創建文件
*
* @param application
* JSP/Servlet 的 ServletContext
* @param filePath
* 相對文件路徑
*/
public static boolean createFile(ServletContext application, String filePath) {
if (!isEmpty(filePath)) {
String physicalFilePath = application.getRealPath(filePath);
if (!isEmpty(physicalFilePath)) {
java.io.File file = new java.io.File(physicalFilePath);
try {
// 創建文件
return file.createNewFile();
} catch (IOException e) {
System.err.println("Unable to create file " + filePath);
}
}
}
return false;
}
/**
* 在指定的 Web 應用程序目錄下以指定路徑創建目錄.
*
* @param application
* JSP/Servlet 的 ServletContext
* @param filePath
* 相對文件路徑
*/
public static boolean createDir(ServletContext application, String filePath) {
if (!isEmpty(filePath)) {
String physicalFilePath = application.getRealPath(filePath);
if (!isEmpty(physicalFilePath)) {
try {
// 創建目錄
java.io.File dir = new java.io.File(application
.getRealPath(filePath));
return dir.mkdirs();
} catch (Exception e) {
System.err
.println("Unable to create directory " + filePath);
}
}
}
return false;
}
/**
* 檢查指定的 Web 應用程序目錄下的文件是否存在.
*
* @param application
* JSP/Servlet 的 ServletContext
* @param filePath
* 相對文件路徑
* @return boolean - 文件是否存在
*/
public static boolean checkFileExists(ServletContext application,
String filePath) {
if (!isEmpty(filePath)) {
String physicalFilePath = application.getRealPath(filePath);
if (!isEmpty(physicalFilePath)) {
java.io.File file = new java.io.File(physicalFilePath);
return file.exists();
}
}
return false;
}
/**
* 獲取文件圖標名.
* Date: 2005-10
* @param application JSP/Servlet 的 ServletContext
* @param iconDirPath 圖標文件夾的路徑
* @param fileName 需要處理的文件名
* @return 圖標文件相對路徑
*/
public static String getFileIcon(ServletContext application,
String iconDirPath, String fileName) {
String ext = getExtension(fileName);
String filePath = iconDirPath + ext + ".gif";
// return filePath;
if(checkFileExists(application, filePath)) {
return filePath;
}
return iconDirPath + "file.gif";
}
/**
* 輸出分頁顯示的結果.
*
* @param page
* 當前頁面
* @param recordCount
* 所有結果
* @param pageSize
* 一頁顯示的多少
* @param pageCountSize
* 前后跳頁的多少
* @param linkpageurl
* 連接頁面的 URL 字符串
* @return 分頁結果的字符串.
*/
public static String paging(int page, int recordCount, int pageSize,
int pageCountSize, String linkpageurl) {
int PageCount = -1; //頁面總數
String LinkPageName = linkpageurl;
String LinkText = "";
int StartPage;
int TempPage;
int TempPageCount;
TempPage = (page - 1) % pageCountSize; //唱贛瘤 備竊
StartPage = page - TempPage; //矯累 其撈瘤 備竊
TempPageCount = recordCount % pageSize;
if (TempPageCount == 0) {
PageCount = recordCount / pageSize;
} else {
PageCount = (recordCount / pageSize) + 1; //傈眉 其撈瘤 薦
}
String txtPrev = " [前" + pageCountSize + "頁] ";
String txtNext = " [后" + pageCountSize + "頁] ";
String txtStart = " [首頁] ";
String txtEnd = " [末頁] ";
//貿瀾欄肺
if (StartPage - 1 > 0) {
LinkText += "<a href='" + LinkPageName + "&page=1' title='到此頁'>"
+ txtStart + "</a>";
} else {
LinkText += txtStart;
}
//撈傈 10俺..
if (StartPage - 1 > 0) {
LinkText += "<a href='" + LinkPageName + "&page=" + (StartPage - 1)
+ "' title='到第" + pageCountSize + "頁'>" + txtPrev + "</a>";
} else {
LinkText += txtPrev;
}
for (int i = StartPage; i < StartPage + pageCountSize; i++) {
if (i < PageCount + 1) {
LinkText += "<a href='" + LinkPageName + "&page=";
LinkText += i + "' title='" + i + "頁'>";
if (i == page) {
LinkText += "<b>[" + i + "]</b>";
} else {
LinkText += "[" + i + "]";
}
LinkText += "</a>";
}
}
//中間頁面
if (StartPage + pageCountSize - PageCount - 1 < 0) {
LinkText += "<a href='" + LinkPageName + "&page="
+ (StartPage + pageCountSize) + "' title='到第"
+ pageCountSize + "頁'>" + txtNext + "</a>";
} else {
LinkText += txtNext;
}
//最后一頁
if (StartPage + pageCountSize <= PageCount) {
LinkText += "<a href='" + LinkPageName + "&page=" + PageCount
+ "' title='最后一頁'>" + txtEnd + "</a>";
} else {
LinkText += txtEnd;
}
return LinkText;
}
/**
* Gets the absolute pathname of the class or resource file containing the
* specified class or resource name, as prescribed by the current classpath.
*
* @param resourceName
* Name of the class or resource name.
* @return the absolute pathname of the given resource
*/
public static String getPath(String resourceName) {
if (!resourceName.startsWith("/")) {
resourceName = "/" + resourceName;
}
//resourceName = resourceName.replace('.', '/');
java.net.URL classUrl = new StringUtil().getClass().getResource(
resourceName);
if (classUrl != null) {
//System.out.println("\nClass '" + className +
//"' found in \n'" + classUrl.getFile() + "'");
//System.out.println("\n資源 '" + resourceName +
//"' 在文件 \n'" + classUrl.getFile() + "' 中找到.");
return classUrl.getFile();
}
//System.out.println("\nClass '" + className +
//"' not found in \n'" +
//System.getProperty("java.class.path") + "'");
//System.out.println("\n資源 '" + resourceName +
//"' 沒有在類路徑 \n'" +
//System.getProperty("java.class.path") + "' 中找到");
return null;
}
/**
* 將日期轉換為中文表示方式的字符串(格式為 yyyy年MM月dd日 HH:mm:ss).
*/
public static String dateToChineseString(Date date) {
if (date == null) {
return "";
}
java.text.SimpleDateFormat dateFormat = new java.text.SimpleDateFormat(
"yyyy年MM月dd日 HH:mm:ss");
return dateFormat.format(date);
}
/**
* 將日期轉換為 14 位的字符串(格式為yyyyMMddHHmmss).
*/
public static String dateTo14String(Date date) {
if (date == null) {
return null;
}
java.text.SimpleDateFormat dateFormat = new java.text.SimpleDateFormat(
"yyyyMMddHHmmss");
return dateFormat.format(date);
}
/**
* 將 14 位的字符串(格式為yyyyMMddHHmmss)轉換為日期.
*/
public static Date string14ToDate(String input) {
if (isEmpty(input)) {
return null;
}
if (input.length() != 14) {
return null;
}
java.text.SimpleDateFormat dateFormat = new java.text.SimpleDateFormat(
"yyyyMMddHHmmss");
try {
return dateFormat.parse(input);
} catch (Exception ex) {
ex.printStackTrace();
}
return null;
}
// -----------------------------------------------------------
// ---------- 字符串和數字轉換工具方法, 2004.03.27 添加 --------
//------------------------------------------------------------
public static byte getByte(HttpServletRequest httpservletrequest, String s) {
if (httpservletrequest.getParameter(s) == null
|| httpservletrequest.getParameter(s).equals("")) {
return 0;
}
return Byte.parseByte(httpservletrequest.getParameter(s));
}
/**
* Reading a parameter as integer from the http servlet request.
*
*/
public static int getInt(HttpServletRequest httpservletrequest, String s) {
if (httpservletrequest.getParameter(s) == null
|| httpservletrequest.getParameter(s).equals("")) {
return 0;
}
return Integer.parseInt(httpservletrequest.getParameter(s));
}
public static long getLong(HttpServletRequest httpservletrequest, String s) {
if (httpservletrequest.getParameter(s) == null
|| httpservletrequest.getParameter(s).equals("")) {
return 0L;
}
return Long.parseLong(httpservletrequest.getParameter(s));
}
public static short getShort(HttpServletRequest httpservletrequest, String s) {
if (httpservletrequest.getParameter(s) == null
|| httpservletrequest.getParameter(s).equals("")) {
return 0;
}
return Short.parseShort(httpservletrequest.getParameter(s));
}
/**
* 將 TEXT 文本轉換為 HTML 代碼, 已便于網頁正確的顯示出來.
*
* @param input
* 輸入的文本字符串
* @return 轉換后的 HTML 代碼
*/
public static String textToHtml(String input) {
if (isEmpty(input)) {
return "";
}
input = replace(input, "<", "<");
input = replace(input, ">", ">");
input = replace(input, "\n", "<br>\n");
input = replace(input, "\t", " ");
input = replace(input, " ", " ");
return input;
}
public static String toQuoteMark(String s) {
s = replaceString(s, "'", "'");
s = replaceString(s, "\"", """);
s = replaceString(s, "\r\n", "\n");
return s;
}
public static String replaceChar(String s, char c, char c1) {
if (s == null) {
return "";
}
return s.replace(c, c1);
}
public static String replaceString(String s, String s1, String s2) {
if (s == null || s1 == null || s2 == null) {
return "";
}
return s.replaceAll(s1, s2);
}
public static String toHtml(String s) {
s = replaceString(s, "<", "<");
s = replaceString(s, ">", ">");
return s;
}
public static String toBR(String s) {
s = replaceString(s, "\n", "<br>\n");
s = replaceString(s, "\t", " ");
s = replaceString(s, " ", " ");
return s;
}
public static String toSQL(String s) {
s = replaceString(s, "\r\n", "\n");
return s;
}
public static String replaceEnter(String s) throws NullPointerException {
return s.replaceAll("\n", "<br>");
}
public static String replacebr(String s) throws NullPointerException {
return s.replaceAll("<br>", "\n");
}
public static String replaceQuote(String s) throws NullPointerException {
return s.replaceAll("'", "''");
}
// Test only.
public static void main(String[] args) throws Exception {
//System.out.println(textToHtml("1<2\r\n<b>Bold</b>"));
//System.out.println(scriptAlert("oh!"));
//System.out.println(scriptRedirect("http://localhost/"));
// System.out.println(StringUtil.getPath("/databaseconfig.properties"));
// java.io.File file = new java.io.File("e:\\Moblog\\abcd\\");
//
// file.mkdir();
Date time = (parseHMSStringToDate("12:23:00"));
System.out.println(time.toLocaleString());
Date nowTime = parseHMSStringToDate(formatDateToHMSString(new Date()));
System.out.println(nowTime.toLocaleString());
// GregorianCalendar cal = new GregorianCalendar();
// cal.setTime(new Date());
// cal.add(cal.YEAR, -cal.get(cal.YEAR) + 1970);
// cal.add(cal.MONTH, -cal.get(cal.MONTH));
// cal.add(cal.DATE, -cal.get(cal.DATE) + 1);
//
// System.out.println(cal.getTime().toLocaleString());
}
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