java HttpServer构建http服务器
package com.tdt.server.httpserver;
import java.io.IOException;
import java.net.InetSocketAddress;
import com.sun.net.httpserver.HttpServer;
import com.sun.net.httpserver.spi.HttpServerProvider;
/**
*
* @author chuer
* @Description: 服务器启动类
* @date 2014年11月12日 下午3:53:38
* @version V1.0
*/
public class MyHttpServer {
//启动服务，监听来自客户端的请求
public static void start() throws IOException {
Context.load();
HttpServerProvider provider = HttpServerProvider.provider();
HttpServer httpserver =provider.createHttpServer(new InetSocketAddress(8080), 100);//监听端口8080,能同时接 受100个请求
httpserver.createContext(Context.contextPath, new MyHttpHandler());
httpserver.setExecutor(null);
httpserver.start();
System.out.println("server started");
}
public static void main(String[] args) throws IOException {
start();
}
}
package com.tdt.server.httpserver;
import java.io.IOException;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.tdt.server.httpserver.core.Handler;
import com.tdt.server.httpserver.core.impl.HttpRequest;
import com.tdt.server.httpserver.core.impl.HttpResponse;
/**
* @author chuer
* @Description: 内部消息处理类
* @date 2014年11月12日 下午3:53:44
* @version V1.0
*/
public class MyHttpHandler implements HttpHandler {
public void handle(HttpExchange httpExchange) throws IOException {
HttpRequest request = new HttpRequest(httpExchange);
HttpResponse response = new HttpResponse(httpExchange);
Handler handler = Context.getHandler(request.getReuestURI().getPath());
handler.service(request, response);
}
}
package com.tdt.server.httpserver;
import java.util.HashMap;
import java.util.Map;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import com.tdt.server.httpserver.core.impl.HttpHandler;
import com.tdt.server.httpserver.utils.XmlUtils;
/**
*
* @author chuer
* @Description: 上下文
* @date 2014年11月12日 下午3:53:48
* @version V1.0
*/
public class Context {
private static Map<String,HttpHandler> contextMap = new HashMap<String,HttpHandler>();
public static String contextPath = "";
public static void load(){
try{
Document doc = XmlUtils.load(Context.class.getResource("/").getPath()+"context.xml");
Element root = doc.getDocumentElement();
contextPath = XmlUtils.getAttribute(root,"context");
Element[] handlers = XmlUtils.getChildrenByName(root, "handler");
for(Element ele : handlers){
String handle_class = XmlUtils.getChildText(ele, "handler-class");
String url_pattern = XmlUtils.getChildText(ele, "url-pattern");
Class<?> cls = Class.forName(handle_class);
Object newInstance = cls.newInstance();
if(newInstance instanceof HttpHandler){
contextMap.put(contextPath+url_pattern, (HttpHandler)newInstance);
}
}
}catch(Exception e){
e.printStackTrace();
}
}
/**
*
* @param key
* @return
*/
public static HttpHandler getHandler(String key){
return contextMap.get(key);
}
}
<?xml version="1.0" encoding="UTF-8"?> <httpServer context="/myApp"> <handler> <handler-class>com.tdt.server.httpserver.sample.FirstHandler</handler-class> <url-pattern>/firstHandler</url-pattern> </handler> </httpServer>
package com.tdt.server.httpserver.core;
/**
*
* @author chuer
* @Description: 相应类接口
* @date 2014年11月12日 下午3:54:02
* @version V1.0
*/
public interface Response {
public void write(String result);
}
package com.tdt.server.httpserver.core;
import java.net.URI;
/**
* @author chuer
* @Description: 请求接口
* @date 2014年11月12日 下午3:54:58
* @version V1.0
*/
public interface Request {
public final static String GET = "GET";
public final static String POST = "POST";
public String getParamter(String param);
public String getMethod();
public URI getReuestURI();
public void initRequestHeader();
public void initRequestParam();
public void initRequestBody();
public String getRequestBody();
}
package com.tdt.server.httpserver.core;
/**
* @author chuer
* @Description: 消息处理接口
* @date 2014年11月12日 下午3:55:10
* @version V1.0
*/
public interface Handler {
public void service(Request request, Response response);
public void doGet(Request request, Response response);
public void doPost(Request request, Response response);
}
package com.tdt.server.httpserver.core.impl;
import com.tdt.server.httpserver.core.Handler;
import com.tdt.server.httpserver.core.Request;
import com.tdt.server.httpserver.core.Response;
public abstract class HttpHandler implements Handler {
@Override
public void service(Request request, Response response) {
request.initRequestHeader();
request.initRequestParam();
if(request.getMethod().equals(Request.GET)){
doGet(request,response);
}else if(request.getMethod().equals(Request.POST)){
request.initRequestBody();
doPost(request,response);
}
}
@Override
public abstract void doGet(Request request, Response response);
@Override
public abstract void doPost(Request request, Response response);
}
package com.tdt.server.httpserver.core.impl;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URI;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import com.sun.net.httpserver.HttpExchange;
import com.tdt.server.httpserver.core.Request;
public class HttpRequest implements Request {
private HttpExchange httpExchange;
private Map<String, String> paramMap = new HashMap<String, String>();
private Map<String, List<String>> headMap = new HashMap<String, List<String>>();
private String requestBody = "";
public HttpRequest(HttpExchange httpExchange) {
this.httpExchange = httpExchange;
}
@Override
public String getParamter(String param) {
return paramMap.get(param);
}
@Override
public String getMethod() {
return httpExchange.getRequestMethod().trim().toUpperCase();
}
@Override
public URI getReuestURI() {
return httpExchange.getRequestURI();
}
@Override
public void initRequestParam() {
String query = getReuestURI().getQuery();
String [] arrayStr = query.split("&");
for(String str : arrayStr){
paramMap.put(str.split("=")[0], str.split("=")[1]);
}
}
@Override
public void initRequestHeader() {
for(String s : httpExchange.getRequestHeaders().keySet()){
headMap.put(s, httpExchange.getRequestHeaders().get(s));
}
}
@Override
public void initRequestBody() {
InputStream in = httpExchange.getRequestBody(); // 获得输入流
BufferedReader reader = new BufferedReader(new InputStreamReader(in));
String temp = null;
try {
while ((temp = reader.readLine()) != null) {
requestBody += temp;
}
} catch (IOException e) {
e.printStackTrace();
}
}
@Override
public String getRequestBody() {
return requestBody;
}
public static void main(String[] args) {
String query = "aaa=aaa&bbb=bbb";
String [] a = query.split("&");
for(String s : a){
System.out.print(s.split("=")[0]+"=");
System.out.println(s.split("=")[1]);
}
}
}
package com.tdt.server.httpserver.core.impl;
import java.io.IOException;
import java.io.OutputStream;
import com.sun.net.httpserver.HttpExchange;
import com.tdt.server.httpserver.core.Response;
public class HttpResponse implements Response{
private HttpExchange httpExchange;
public HttpResponse(HttpExchange httpExchange){
this.httpExchange = httpExchange;
}
@Override
public void write(String result) {
try {
httpExchange.sendResponseHeaders(200, result.length());// 设置响应头属性及响应信息的长度
OutputStream out = httpExchange.getResponseBody(); // 获得输出流
out.write(result.getBytes());
out.flush();
httpExchange.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
package com.tdt.server.httpserver.sample;
import com.tdt.server.httpserver.core.Request;
import com.tdt.server.httpserver.core.Response;
import com.tdt.server.httpserver.core.impl.HttpHandler;
public class FirstHandler extends HttpHandler{
@Override
public void doGet(Request request, Response response) {
System.out.println("doGet");
System.out.println(request.getParamter("aaa"));
System.out.println(request.getParamter("bbb"));
response.write("helloWorld.....");
}
@Override
public void doPost(Request request, Response response) {
System.out.println("doPost");
System.out.println(request.getRequestBody());
response.write("helloWorld.....");
}
}
启动服务器类，浏览器输出http://localhost:8080/myApp/firstHandler?aaa=aaa&bbb=bbb
显示hello world....
XmlUtils类是用来解析xml文件的，没有放到这里.
重定向代码实例：
<pre class="java" name="code">Headers responseHeaders = httpExchange.getResponseHeaders();
responseHeaders.add("location", "http://www.baidu.com");
httpExchange.sendResponseHeaders(302, 0);
httpExchange.close();
OutputStream out = httpExchange.getResponseBody();
out.write(result.getBytes());
out.flush();
工具类：
package com.tdt.server.httpserver.utils;
import java.io.CharArrayReader;
import java.io.File;
import java.lang.reflect.Constructor;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.Map;
import java.util.Properties;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import org.w3c.dom.Comment;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.xml.sax.InputSource;
/**
* <p>
* Title: XmlUtils
* </p>
* <p>
* Description: XML文件处理工具
* </p>
* <p>
* Copyright: Copyright (c) 2008
* </p>
* <p>
* Company: Ocean Blue Mobile Tech.
* </p>
*
* @author chur
* @version 1.0
*/
public class XmlUtils {
public static final String BR = System.getProperty("line.separator");
/**
* load a xml file from OS file system and interpret it into a Document no
* charset limited
*
* @param xmlfile
* String 文件路径名
* @return Document
* @throws Exception
*/
public static Document load(String xmlfile) throws Exception {
javax.xml.parsers.DocumentBuilderFactory factory =
javax.xml.parsers.DocumentBuilderFactory.newInstance();
factory.setIgnoringComments(false);
factory.setIgnoringElementContentWhitespace(false);
factory.setValidating(false);
factory.setCoalescing(false);
DocumentBuilder builder = factory.newDocumentBuilder();
return builder.parse(xmlfile);
}
/**
* load a xml file from OS file system and interpret it into a Document no
* charset limited
*
* @param xmlfile
* String 文件路径名
* @return Document
* @throws Exception
*/
public static Document load(File xmlfile) throws Exception {
javax.xml.parsers.DocumentBuilderFactory factory =
javax.xml.parsers.DocumentBuilderFactory.newInstance();
factory.setIgnoringComments(false);
factory.setIgnoringElementContentWhitespace(false);
factory.setValidating(false);
factory.setCoalescing(false);
DocumentBuilder builder = factory.newDocumentBuilder();
return builder.parse(xmlfile);
}
/**
* 取得文件名
*
* @param filePath
* String
* @return String
*/
public static String getFileName(String filePath) {
Pattern p = Pattern.compile("[^\\" + File.separator + "]+.xml");
Matcher m = p.matcher(filePath);
if (m.find()) {
return m.group().substring(0, m.group().length() - 4);
}
return "";
}
/**
* 验证文件名是否合法
*
* @param filePath
* String
* @return String
*/
public static boolean checkValidity(String filePath) {
String[] array = filePath.split(".");
if (array[array.length - 1].equals("xml")) {
return true;
} else {
return false;
}
}
public static boolean isXml(String file) {
if (file.toLowerCase().endsWith("xml")) {
return true;
} else {
return false;
}
}
/**
* load a String without the title tag of xml into a Document
*
* @param domContent
* String 没有head的XML内容
* @return Document
* @throws Exception
*/
public static Document loadStringWithoutTitle(String domContent)
throws Exception {
domContent = "<?xml version=\"1.0\" encoding=\"utf-8\"?>" + BR
+ domContent;
return XmlUtils.loadString(domContent);
}
/**
* load a String with a title tag of xml into a Document
*
* @param domContent
* String XML内容
* @return Document
* @throws Exception
*/
public static Document loadString(String domContent) throws Exception {
javax.xml.parsers.DocumentBuilderFactory factory = javax.xml.parsers.DocumentBuilderFactory.newInstance();
factory.setIgnoringComments(false);
factory.setIgnoringElementContentWhitespace(false);
factory.setValidating(false);
factory.setCoalescing(false);
DocumentBuilder builder = factory.newDocumentBuilder();
char[] chars = new char[domContent.length()];
domContent.getChars(0, domContent.length(), chars, 0);
InputSource is = new InputSource(new CharArrayReader(chars));
return (builder.parse(is));
}
/**
* 根据完整路径得到整个文档的一个子节点的文字
*
* @param doc
* Document 文档
* @param fullname
* String 子节点完整路径
* @return String
*/
public static String getTextByFullName(Document doc, String fullname) {
String path[] = StringUtils.toStringArray(fullname, ".");
Element e = doc.getDocumentElement();
for (int i = 1; i < path.length; i++) {
e = getChildByName(e, path[i]);
}
return getText(e);
}
/**
* 根据完整路径得到某个节点的一个子节点的文字
*
* @param parent
* Element 父节点
* @param fullname
* String 子节点完整路径
* @return String
*/
public static String getTextByFullName(Element parent, String fullname) {
String path[] = StringUtils.toStringArray(fullname, ".");
Element e = parent;
for (int i = 0; i < path.length; i++) {
e = getChildByName(e, path[i]);
}
return getText(e);
}
/**
* 根据一个document对象获取某节点下的property的内容
* @param parent
* Element
* @param name
* String
* @return String
*/
public static String getChildText(Element parent, String name) {
Element e = getChildByName(parent, name);
if (e == null) {
return "";
}
return getText(e);
}
/**
* 根据名称得到一个父节点下所有的子节点
*
* @param e
* Element
* @param name
* String
* @return Element[]
*/
public static Element[] getChildrenByName(Element e, String name) {
NodeList nl = e.getChildNodes();
int max = nl.getLength();
LinkedList<Node> list = new LinkedList<Node>();
for (int i = 0; i < max; i++) {
Node n = nl.item(i);
if (n.getNodeType() == Node.ELEMENT_NODE
&& n.getNodeName().equals(name)) {
list.add(n);
}
}
return list.toArray(new Element[list.size()]);
}
/**
* 根据名字查找某个节点下的符合该名字的节点
*
* @param e
* Element 父节点
* @param name
* String 子节点名称
* @return Element
*/
public static Element getChildByName(Element e, String name) {
Element[] list = getChildrenByName(e, name);
if (list.length == 0) {
return null;
}
if (list.length > 1) {
throw new IllegalStateException("Too many (" + list.length + ") '"
+ name + "' elements found!");
}
return list[0];
}
/**
* 得到一个节点的文字
*
* @param e
* Element
* @return String
*/
public static String getText(Element e) {
NodeList nl = e.getChildNodes();
int max = nl.getLength();
for (int i = 0; i < max; i++) {
Node n = nl.item(i);
if (n.getNodeType() == Node.TEXT_NODE) {
return n.getNodeValue();
}
}
return "";
}
public static String getAttribute(Element e, String name) {
return e.getAttribute(name);
}
/**
* get Int value
*
* @param player
* @param name
* @return
*/
public static int getIntValue(Element e) {
return Integer.valueOf(getText(e));
}
/**
* get byte value
*
* @param player
* @param name
* @return
*/
public static byte getByteValue(Element e) {
return Byte.valueOf(getText(e));
}
/**
* 获取Properties格式的xml数据
*
* @param root
* @return
*/
public static Map<String, Object> getProperties(Element root) {
Map<String, Object> map = new HashMap<String, Object>();
Element[] list = getChildrenByName(root, "property");
for (int i = 0; i < list.length; i++) {
String name = list[i].getAttribute("name");
String type = list[i].getAttribute("type");
String valueString = getText(list[i]);
try {
Class<?> cls = Class.forName(type);
Constructor<?> con = cls.getConstructor(new Class<?>[] { String.class
});
Object value = con.newInstance(new Object[] { valueString
});
map.put(name, value);
} catch (Exception e) {
System.err.println("Unable to parse property '" + name +
"'='" + valueString + "': " + e.toString());
}
}
return map;
}
/**
* 将dom中的内容存入xmlfile所指的文件中。 dom==null时，xml文件也是空的。
*
* @param xmlfile
* java.lang.String 保存的文件名
* @param doc
* ort.w3c.dom.Document 需要保存的DOM
* @throws Exception
* 任何异常
*/
public static void save(String xmlfile, Document doc) throws Exception {
// 首先创建一个DOMSource对象,该构造函数的参数可以是一个Document对象
// doc代表更改后的DOM Tree。
DOMSource doms = new DOMSource(doc);
// 创建一个File对象,代表DOM Tree所包含的数据的输出介质,这是一个XML文件。
File f = new File(xmlfile);
File dir = f.getParentFile();
dir.mkdirs();
// 创建一个StreamResult对象,该构造函数的参数可以取为File对象。
StreamResult sr = new StreamResult(f);
// 下面调用JAXP中的XSLT引擎来实现输出DOM Tree中的数据到XML文件中的功能。
// XSLT引擎的输入为DOMSource对象,输出为StreamResut对象。
try {
// 首先创建一个TransformerFactory对象,再由此创建Transformer对象。Transformer
// 类相当于一个XSLT引擎。通常我们使用它来处理XSL文件,但是在这里我们使
// 用它来输出XML文档。
TransformerFactory tf = TransformerFactory.newInstance();
Transformer t = tf.newTransformer();
// 设置新的输出属性:输出字符编码为UTF-8,XSLT引擎所输出
// 的XML文档如果包含了中文字符,可以正常显示,不会出现所谓的"汉字问题"。
// 请留意OutputKeys类的字符串常数OutputKeys.ENCODING。
Properties properties = t.getOutputProperties();
properties.setProperty(OutputKeys.ENCODING, "UTF-8");
properties.setProperty(OutputKeys.INDENT, "yes");
// 更新XSLT引擎的输出属性。
t.setOutputProperties(properties);
// 关键的一步, 调用Transformer对象 (XSLT引擎)的transform()方法,该方法的第一
// 个参数是DOMSource对象,第二个参数是StreamResult对象。
t.transform(doms, sr);
} catch (TransformerConfigurationException tce) {
tce.printStackTrace();
} catch (TransformerException te) {
te.printStackTrace();
}
}
/**
* create a blank Document.
*
* @param rootElementName
* String
* @return Document
* @throws Exception
*/
public static Document blankDocument(String rootElementName)
throws Exception {
javax.xml.parsers.DocumentBuilderFactory factory =
javax.xml.parsers.DocumentBuilderFactory.newInstance();
factory.setIgnoringComments(false);
factory.setIgnoringElementContentWhitespace(false);
factory.setValidating(false);
factory.setCoalescing(false);
DocumentBuilder builder = factory.newDocumentBuilder();
Document doc = builder.newDocument();
Element root = doc.createElement(rootElementName);
doc.appendChild(root);
return doc;
}
public static Element createChild(Document doc, Element root, String name) {
Element elem = doc.createElement(name);
root.appendChild(elem);
return elem;
}
public static void createChildText(Document doc, Element elem, String name,
String value) {
Element child = doc.createElement(name);
child.appendChild(doc.createTextNode(value == null ? "" : value));
elem.appendChild(child);
}
/**
* 创建一个带注释的子节点
*
* @param doc
* Document
* @param elem
* Element
* @param name
* String
* @param value
* String
* @param comment
* String
*/
public static void createChildTextWithComment(Document doc, Element elem,
String name, String value, String comment) {
Element child = doc.createElement(name);
child.appendChild(doc.createTextNode(value == null ? "" : value));
Comment c = doc.createComment(comment);
elem.appendChild(c);
elem.appendChild(child);
}
/**
* 创建一段注释
*
* @param doc
* Document
* @param comment
* String
*/
public static void createComment(Document doc, String comment) {
Comment c = doc.createComment(comment);
doc.getDocumentElement().appendChild(c);
}
public static void createOptionalChildText(Document doc, Element elem,
String name, String value) {
if (value == null || value.length() == 0) {
return;
}
Element child = doc.createElement(name);
child.appendChild(doc.createTextNode(value));
elem.appendChild(child);
}
public static void applyProperties(Object o, Element root) {
Map<String,Object> map = getProperties(root);
Iterator<String> it = map.keySet().iterator();
Field[] fields = o.getClass().getFields();
Method[] methods = o.getClass().getMethods();
while (it.hasNext()) {
String name = (String) it.next();
Object value = map.get(name);
try {
for (int i = 0; i < fields.length; i++) {
if (fields[i].getName().equalsIgnoreCase(name) && isTypeMatch(fields[i].getType(),
value.getClass())) {
fields[i].set(o, value);
System.err.println("Set field " + fields
[i].getName() + "=" + value);
break;
}
}
for (int i = 0; i < methods.length; i++) {
if (methods[i].getName().equalsIgnoreCase("set" + name) && methods[i].getParameterTypes
().length == 1 && isTypeMatch(methods
[i].getParameterTypes()[0], value.getClass())) {
methods[i].invoke(o, new Object[] { value
});
System.err.println("Set method " + methods
[i].getName() + "=" + value);
break;
}
}
} catch (Exception e) {
System.err.println("Unable to apply property '" + name + "': " + e.toString());
}
}
}
private static boolean isTypeMatch(Class<?> one, Class<?> two) {
if (one.equals(two)) {
return true;
}
if (one.isPrimitive()) {
if (one.getName().equals("int") && two.getName().equals("java.lang.Integer")) {
return true;
}
if (one.getName().equals("long") && two.getName().equals("java.lang.Long")) {
return true;
}
if (one.getName().equals("float") && two.getName().equals("java.lang.Float")) {
return true;
}
if (one.getName().equals("double") && two.getName().equals("java.lang.Double")) {
return true;
}
if (one.getName().equals("char") && two.getName().equals("java.lang.Character")) {
return true;
}
if (one.getName().equals("byte") && two.getName().equals("java.lang.Byte")) {
return true;
}
if (one.getName().equals("short") && two.getName().equals("java.lang.Short")) {
return true;
}
if (one.getName().equals("boolean") && two.getName().equals("java.lang.Boolean")) {
return true;
}
}
return false;
}
}
package com.tdt.server.httpserver.utils;
import java.util.LinkedList;
import java.util.StringTokenizer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class StringUtils {
/**
* Converts a line of text into an array of lower case words. Words are
* delimited by the following characters: , .\r\n:/\+
* <p>
* In the future, this method should be changed to use a
* BreakIterator.wordInstance(). That class offers much more fexibility.
*
* @param text
* a String of text to convert into an array of words
* @return text broken up into an array of words.
*/
public static final String[] toLowerCaseWordArray(String text) {
if (text == null || text.length() == 0) {
return new String[0];
}
StringTokenizer tokens = new StringTokenizer(text, " ,\r\n.:/\\+");
String[] words = new String[tokens.countTokens()];
for (int i = 0; i < words.length; i++) {
words[i] = tokens.nextToken().toLowerCase();
}
return words;
}
/**
* Converts a line of text into an array of lower case words. Words are
* delimited by the following characters: , .\r\n:/\+
* <p>
* In the future, this method should be changed to use a
* BreakIterator.wordInstance(). That class offers much more fexibility.
*
* @param text
* a String of text to convert into an array of words
* @return text broken up into an array of words.
*/
public static final String[] toStringArray(String text) {
if (text == null || text.length() == 0) {
return new String[0];
}
StringTokenizer tokens = new StringTokenizer(text, ",\r\n/\\");
String[] words = new String[tokens.countTokens()];
for (int i = 0; i < words.length; i++) {
words[i] = tokens.nextToken();
}
return words;
}
/**
* * Converts a line of text into an array of lower case words. Words are
* delimited by the following characters: , .\r\n:/\+
* <p>
* In the future, this method should be changed to use a
* BreakIterator.wordInstance(). That class offers much more fexibility.
*
* @param text
* a String of text to convert into an array of words
* @param token
* String
* @return String[]broken up into an array of words.
*/
public static final String[] toStringArray(String text, String token) {
if (text == null || text.length() == 0) {
return new String[0];
}
StringTokenizer tokens = new StringTokenizer(text, token);
String[] words = new String[tokens.countTokens()];
for (int i = 0; i < words.length; i++) {
words[i] = tokens.nextToken();
}
return words;
}
/**
*
* @param source
* @return
*/
public static String[] splitOnWhitespace(String source) {
int pos = -1;
LinkedList<String> list = new LinkedList<String>();
int max = source.length();
for (int i = 0; i < max; i++) {
char c = source.charAt(i);
if (Character.isWhitespace(c)) {
if (i - pos > 1) {
list.add(source.substring(pos + 1, i));
}
pos = i;
}
}
return list.toArray(new String[list.size()]);
}
/**
* Replayer str
*
* @param str
* @param key
* @param replacement
* @return
*/
public static final String replaceAll(String str, String key,
String replacement) {
if (str != null && key != null && replacement != null
&& !str.equals("") && !key.equals("")) {
StringBuilder strbuf = new StringBuilder();
int begin = 0;
int slen = str.length();
int npos = 0;
int klen = key.length();
for (; begin < slen && (npos = str.indexOf(key, begin)) >= begin; begin = npos
+ klen) {
strbuf.append(str.substring(begin, npos)).append(replacement);
}
if (begin == 0) {
return str;
}
if (begin < slen) {
strbuf.append(str.substring(begin));
}
return strbuf.toString();
} else {
return str;
}
}
public static String UnicodeToString(String str) {
Pattern pattern = Pattern.compile("(\\\\u(\\p{XDigit}{4}))");
Matcher matcher = pattern.matcher(str);
char ch;
boolean hasU = false;
while (matcher.find()) {
hasU = true;
ch = (char) Integer.parseInt(matcher.group(2), 16);
str = str.replace(matcher.group(1), ch + "");
}
String s = str;
try{
if(!hasU){
int i = 0;
String rstr = "";
while(i+4<=str.length()){
ch = (char) Integer.parseInt(str.substring(i,i=i+4), 16);
rstr = rstr+ch;
}
str = rstr;
}
}catch(Exception ex){
str = s;
ex.printStackTrace();
}
return str;
}
/** 空字符串。 */
public static final String EMPTY_STRING = "";
/**
* 比较两个字符串（大小写敏感）。
* <pre>
* StringUtil.equals(null, null) = true
* StringUtil.equals(null, "abc") = false
* StringUtil.equals("abc", null) = false
* StringUtil.equals("abc", "abc") = true
* StringUtil.equals("abc", "ABC") = false
* </pre>
*
* @param str1 要比较的字符串1
* @param str2 要比较的字符串2
*
* @return 如果两个字符串相同，或者都是<code>null</code>，则返回<code>true</code>
*/
public static boolean equals(String str1, String str2) {
if (str1 == null) {
return str2 == null;
}
return str1.equals(str2);
}
/**
* 比较两个字符串（大小写不敏感）。
* <pre>
* StringUtil.equalsIgnoreCase(null, null) = true
* StringUtil.equalsIgnoreCase(null, "abc") = false
* StringUtil.equalsIgnoreCase("abc", null) = false
* StringUtil.equalsIgnoreCase("abc", "abc") = true
* StringUtil.equalsIgnoreCase("abc", "ABC") = true
* </pre>
*
* @param str1 要比较的字符串1
* @param str2 要比较的字符串2
*
* @return 如果两个字符串相同，或者都是<code>null</code>，则返回<code>true</code>
*/
public static boolean equalsIgnoreCase(String str1, String str2) {
if (str1 == null) {
return str2 == null;
}
return str1.equalsIgnoreCase(str2);
}
/**
* 检查字符串是否是空白：<code>null</code>、空字符串<code>""</code>或只有空白字符。
* <pre>
* StringUtil.isBlank(null) = true
* StringUtil.isBlank("") = true
* StringUtil.isBlank(" ") = true
* StringUtil.isBlank("bob") = false
* StringUtil.isBlank(" bob ") = false
* </pre>
*
* @param str 要检查的字符串
*
* @return 如果为空白, 则返回<code>true</code>
*/
public static boolean isBlank(String str) {
int length;
if ((str == null) || ((length = str.length()) == 0)) {
return true;
}
for (int i = 0; i < length; i++) {
if (!Character.isWhitespace(str.charAt(i))) {
return false;
}
}
return true;
}
/**
* 检查字符串是否不是空白：<code>null</code>、空字符串<code>""</code>或只有空白字符。
* <pre>
* StringUtil.isBlank(null) = false
* StringUtil.isBlank("") = false
* StringUtil.isBlank(" ") = false
* StringUtil.isBlank("bob") = true
* StringUtil.isBlank(" bob ") = true
* </pre>
*
* @param str 要检查的字符串
*
* @return 如果为空白, 则返回<code>true</code>
*/
public static boolean isNotBlank(String str) {
int length;
if ((str == null) || ((length = str.length()) == 0)) {
return false;
}
for (int i = 0; i < length; i++) {
if (!Character.isWhitespace(str.charAt(i))) {
return true;
}
}
return false;
}
/**
* 检查字符串是否为<code>null</code>或空字符串<code>""</code>。
* <pre>
* StringUtil.isEmpty(null) = true
* StringUtil.isEmpty("") = true
* StringUtil.isEmpty(" ") = false
* StringUtil.isEmpty("bob") = false
* StringUtil.isEmpty(" bob ") = false
* </pre>
*
* @param str 要检查的字符串
*
* @return 如果为空, 则返回<code>true</code>
*/
public static boolean isEmpty(String str) {
return ((str == null) || (str.length() == 0));
}
/**
* 检查字符串是否不是<code>null</code>和空字符串<code>""</code>。
* <pre>
* StringUtil.isEmpty(null) = false
* StringUtil.isEmpty("") = false
* StringUtil.isEmpty(" ") = true
* StringUtil.isEmpty("bob") = true
* StringUtil.isEmpty(" bob ") = true
* </pre>
*
* @param str 要检查的字符串
*
* @return 如果不为空, 则返回<code>true</code>
*/
public static boolean isNotEmpty(String str) {
return ((str != null) && (str.length() > 0));
}
/**
* 在字符串中查找指定字符串，并返回第一个匹配的索引值。如果字符串为<code>null</code>或未找到，则返回<code>-1</code>。
* <pre>
* StringUtil.indexOf(null, *) = -1
* StringUtil.indexOf(*, null) = -1
* StringUtil.indexOf("", "") = 0
* StringUtil.indexOf("aabaabaa", "a") = 0
* StringUtil.indexOf("aabaabaa", "b") = 2
* StringUtil.indexOf("aabaabaa", "ab") = 1
* StringUtil.indexOf("aabaabaa", "") = 0
* </pre>
*
* @param str 要扫描的字符串
* @param searchStr 要查找的字符串
*
* @return 第一个匹配的索引值。如果字符串为<code>null</code>或未找到，则返回<code>-1</code>
*/
public static int indexOf(String str, String searchStr) {
if ((str == null) || (searchStr == null)) {
return -1;
}
return str.indexOf(searchStr);
}
/**
* 在字符串中查找指定字符串，并返回第一个匹配的索引值。如果字符串为<code>null</code>或未找到，则返回<code>-1</code>。
* <pre>
* StringUtil.indexOf(null, *, *) = -1
* StringUtil.indexOf(*, null, *) = -1
* StringUtil.indexOf("", "", 0) = 0
* StringUtil.indexOf("aabaabaa", "a", 0) = 0
* StringUtil.indexOf("aabaabaa", "b", 0) = 2
* StringUtil.indexOf("aabaabaa", "ab", 0) = 1
* StringUtil.indexOf("aabaabaa", "b", 3) = 5
* StringUtil.indexOf("aabaabaa", "b", 9) = -1
* StringUtil.indexOf("aabaabaa", "b", -1) = 2
* StringUtil.indexOf("aabaabaa", "", 2) = 2
* StringUtil.indexOf("abc", "", 9) = 3
* </pre>
*
* @param str 要扫描的字符串
* @param searchStr 要查找的字符串
* @param startPos 开始搜索的索引值，如果小于0，则看作0
*
* @return 第一个匹配的索引值。如果字符串为<code>null</code>或未找到，则返回<code>-1</code>
*/
public static int indexOf(String str, String searchStr, int startPos) {
if ((str == null) || (searchStr == null)) {
return -1;
}
// JDK1.3及以下版本的bug：不能正确处理下面的情况
if ((searchStr.length() == 0) && (startPos >= str.length())) {
return str.length();
}
return str.indexOf(searchStr, startPos);
}
/**
* 取指定字符串的子串。
*
* <p>
* 负的索引代表从尾部开始计算。如果字符串为<code>null</code>，则返回<code>null</code>。
* <pre>
* StringUtil.substring(null, *, *) = null
* StringUtil.substring("", * , *) = "";
* StringUtil.substring("abc", 0, 2) = "ab"
* StringUtil.substring("abc", 2, 0) = ""
* StringUtil.substring("abc", 2, 4) = "c"
* StringUtil.substring("abc", 4, 6) = ""
* StringUtil.substring("abc", 2, 2) = ""
* StringUtil.substring("abc", -2, -1) = "b"
* StringUtil.substring("abc", -4, 2) = "ab"
* </pre>
* </p>
*
* @param str 字符串
* @param start 起始索引，如果为负数，表示从尾部计算
* @param end 结束索引（不含），如果为负数，表示从尾部计算
*
* @return 子串，如果原始串为<code>null</code>，则返回<code>null</code>
*/
public static String substring(String str, int start, int end) {
if (str == null) {
return null;
}
if (end < 0) {
end = str.length() + end;
}
if (start < 0) {
start = str.length() + start;
}
if (end > str.length()) {
end = str.length();
}
if (start > end) {
return EMPTY_STRING;
}
if (start < 0) {
start = 0;
}
if (end < 0) {
end = 0;
}
return str.substring(start, end);
}
/**
* 检查字符串中是否包含指定的字符串。如果字符串为<code>null</code>，将返回<code>false</code>。
* <pre>
* StringUtil.contains(null, *) = false
* StringUtil.contains(*, null) = false
* StringUtil.contains("", "") = true
* StringUtil.contains("abc", "") = true
* StringUtil.contains("abc", "a") = true
* StringUtil.contains("abc", "z") = false
* </pre>
*
* @param str 要扫描的字符串
* @param searchStr 要查找的字符串
*
* @return 如果找到，则返回<code>true</code>
*/
public static boolean contains(String str, String searchStr) {
if ((str == null) || (searchStr == null)) {
return false;
}
return str.indexOf(searchStr) >= 0;
}
/**
* <p>Checks if the String contains only unicode digits.
* A decimal point is not a unicode digit and returns false.</p>
*
* <p><code>null</code> will return <code>false</code>.
* An empty String ("") will return <code>true</code>.</p>
*
* <pre>
* StringUtils.isNumeric(null) = false
* StringUtils.isNumeric("") = true
* StringUtils.isNumeric(" ") = false
* StringUtils.isNumeric("123") = true
* StringUtils.isNumeric("12 3") = false
* StringUtils.isNumeric("ab2c") = false
* StringUtils.isNumeric("12-3") = false
* StringUtils.isNumeric("12.3") = false
* </pre>
*
* @param str the String to check, may be null
* @return <code>true</code> if only contains digits, and is non-null
*/
public static boolean isNumeric(String str) {
if (str == null) {
return false;
}
int sz = str.length();
for (int i = 0; i < sz; i++) {
if (Character.isDigit(str.charAt(i)) == false) {
return false;
}
}
return true;
}
/**
* 字符串拼接
* @param object
* @return
*/
public static String assemble(char sep,Object... object){
if(object == null)return null;
StringBuilder sb = new StringBuilder();
for(Object obj:object){
if(obj == null)obj="";
sb.append(obj.toString()).append(sep);
}
String str = "";
if(sb.length()>0){
str = sb.substring(0, sb.length()-1);
}
return str;
}
// 6-16个字母和数字组成
private static String regex = "^[A-Za-z0-9]$";
/**
* 检测字符串是否符合规则（6-16个字母和数字组成，大小写不敏感）
* @param user
* @return
*/
public static boolean checkStringLegal(String user) {
boolean isMatch = true;
char[] userChars = user.toCharArray();
for(char c : userChars){
isMatch = String.valueOf(c).matches(regex);
if(!isMatch){
break;
}
}
return isMatch;
}
public static String getString(String input) {
return getString(input, true, "");
}
public static String getString(String input, boolean btrim, String dval) {
if (input == null)
return dval;
try {
if (btrim)
return trim(input);
else
return input;
} catch (Exception e) {
return "";
}
}
public static String Trim(String str) {
return trim(str);
}
public static String[] Trim(String[] s) {
return trim(s);
}
public static String trim(String str) {
if (str == null)
return "";
else
return str.trim();
}
public static String[] trim(String[] s) {
if (s == null || s.length <= 0)
return s;
for (int i = 0; i < s.length; i++)
s[i] = trim(s[i]);
return s;
}
public static int getInt(String input, boolean btrim, int dval) {
if (input == null)
return dval;
int val;
try {
String str = new String(input);
if (btrim)
str = trim(str);
val = Integer.parseInt(str);
} catch (Exception e) {
val = dval;
}
return val;
}
public static int[] getInts(String input) {
return getInts(input, ",");
}
public static int[] getInts(String input, String split) {
if (input == null) {
return null;
}
String[] ss = input.split(split);
int[] ii = new int[ss.length];
for (int i=0;i<ii.length;i++) {
ii[i] = getInt(ss[i]);
}
return ii;
}
public static int getInt(String input) {
return getInt(input, true, 0);
}
}