【前言】众所周知,各式各样的Util类为我们提供了便利,也同时减少了我们对底层硬编码的时间,包括对字符串的操作,文件操作,反射的操作,泛型的操作,以及熟知的分页类,Json解析类、日期工具类等,这里把我开发的项目中用到过的工具类分享出来,都是经过多个项目的开发积累而锤炼出来的,提供给大家交流和学习。
【目录】
1.文件操作类 FileUtil
2.反射工具类 ReflectionUtil
3.泛型工具类 GenericsUtils
4.分页组件 Pagenation,PageUtil,Query
5.Http与servlet工具类 ServletUtils
6.日期工具类 DateUtil
7.Json解析类JsonUtil
8.编码与解码工具类 EncodeUtils
【代码片段】 由于篇幅有限,我只列举EncodeUtils、Pagenation,其他的大家下载附件即可查看。
/**
* 各种格式的编码加码工具类.
*
* 集成Commons-Codec,Commons-Lang及JDK提供的编解码方法.
*
* @author fisher
*/
public class EncodeUtils {
private static final String DEFAULT_URL_ENCODING = "UTF-8";
/**
* Hex编码.
*/
public static String hexEncode(byte[] input) {
return Hex.encodeHexString(input);
}
/**
* Hex解码.
*/
public static byte[] hexDecode(String input) {
try {
return Hex.decodeHex(input.toCharArray());
} catch (DecoderException e) {
throw new IllegalStateException("Hex Decoder exception", e);
}
}
/**
* Base64编码.
*/
public static String base64Encode(byte[] input) {
return new String(Base64.encodeBase64(input));
}
/**
* Base64编码, URL安全(将Base64中的URL非法字符如+,/=转为其他字符, 见RFC3548).
*/
public static String base64UrlSafeEncode(byte[] input) {
return Base64.encodeBase64URLSafeString(input);
}
/**
* Base64解码.
*/
public static byte[] base64Decode(String input) {
return Base64.decodeBase64(input);
}
/**
* URL 编码, Encode默认为UTF-8.
*/
public static String urlEncode(String input) {
try {
return URLEncoder.encode(input, DEFAULT_URL_ENCODING);
} catch (UnsupportedEncodingException e) {
throw new IllegalArgumentException(
"Unsupported Encoding Exception", e);
}
}
/**
* URL 解码, Encode默认为UTF-8.
*/
public static String urlDecode(String input) {
try {
return URLDecoder.decode(input, DEFAULT_URL_ENCODING);
} catch (UnsupportedEncodingException e) {
throw new IllegalArgumentException(
"Unsupported Encoding Exception", e);
}
}
/**
* Html 转码.
*/
public static String htmlEscape(String html) {
return StringEscapeUtils.escapeHtml(html);
}
/**
* Html 解码.
*/
public static String htmlUnescape(String htmlEscaped) {
return StringEscapeUtils.unescapeHtml(htmlEscaped);
}
/**
* Xml 转码.
*/
public static String xmlEscape(String xml) {
return StringEscapeUtils.escapeXml(xml);
}
/**
* Xml 解码.
*/
public static String xmlUnescape(String xmlEscaped) {
return StringEscapeUtils.unescapeXml(xmlEscaped);
}
}
/**
* @author fisher
* @description 分页查询对象
*/
public class Pagenation {
/** 是否有上一页 */
private boolean hasPrePage;
/** 是否有下一页 */
private boolean hasNextPage;
/** 每页记录数 */
private int everyPage;
/** 总页数 */
private int totalPage;
/** 当前页 数*/
private int currentPage;
/** 查询的开始行数*/
private int beginIndex;
public Pagenation(){
}
/** construct the page by everyPage
* @param everyPage
* */
public Pagenation(int everyPage){
this.everyPage = everyPage;
}
/** The whole constructor */
public Pagenation(boolean hasPrePage, boolean hasNextPage,
int everyPage, int totalPage,
int currentPage, int beginIndex) {
this.hasPrePage = hasPrePage;
this.hasNextPage = hasNextPage;
this.everyPage = everyPage;
this.totalPage = totalPage;
this.currentPage = currentPage;
this.beginIndex = beginIndex;
}
/**
* @return
* Returns the beginIndex.
*/
public int getBeginIndex() {
return beginIndex;
}
/**
* @param beginIndex
* The beginIndex to set.
*/
public void setBeginIndex(int beginIndex) {
this.beginIndex = beginIndex;
}
/**
* @return
* Returns the currentPage.
*/
public int getCurrentPage() {
return currentPage;
}
/**
* @param currentPage
* The currentPage to set.
*/
public void setCurrentPage(int currentPage) {
this.currentPage = currentPage;
}
/**
* @return
* Returns the everyPage.
*/
public int getEveryPage(){
return everyPage;
}
/**
* @param everyPage
* The everyPage to set.
*/
public void setEveryPage(int everyPage) {
this.everyPage = everyPage;
}
/**
* @return
* Returns the hasNextPage.
*/
public boolean getHasNextPage(){
return hasNextPage;
}
/**
* @param hasNextPage
* The hasNextPage to set.
*/
public void setHasNextPage(boolean hasNextPage) {
this.hasNextPage = hasNextPage;
}
/**
* @return
* Returns the hasPrePage.
*/
public boolean getHasPrePage() {
return hasPrePage;
}
/**
* @param hasPrePage
* The hasPrePage to set.
*/
public void setHasPrePage(boolean hasPrePage) {
this.hasPrePage = hasPrePage;
}
/**
* @return Returns the totalPage.
*
*/
public int getTotalPage() {
return totalPage;
}
/**
* @param totalPage
* The totalPage to set.
*/
public void setTotalPage(int totalPage){
this.totalPage = totalPage;
}
}
【附件】 工具类:
file.zip (15.14 KB) 相关依赖包:
jar.zip (803.26 KB)