2.改变鼠标样式（CSS）
cursor:url('left.cur'),url('left.cur'), default;
3.添加事件 (JS)
setAttribute("onclick", "javascript:comeback();");
4.将中文转换为UTF-8的URL编码方法。
public static String utf(String s){
StringBuffer sb = new StringBuffer();
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
if (c >= 0 && c <= 255) {
sb.append(c);
} else {
byte[] b;
try {
b = String.valueOf(c).getBytes("utf-8");
} catch (Exception ex) {
System.out.println(ex);
b = new byte[0];
}
for (int j = 0; j < b.length; j++) {
int k = b[j];
if (k < 0)
k += 256;
sb.append("%" + Integer.toHexString(k).toUpperCase());
}
}
}
return sb.toString();
}
5.访问一个网站地址将他输出.
public void pintWeb(){
/** 读入输入流的数据长度 */
int chByte = 0;
/** 网络的url地址 */
URL url = null;
/** http连接 */
HttpURLConnection httpConn = null;
/** 输入流 */
BufferedReader br=null;
/** 文件输出流 */
try{
url = new URL("http://10.10.0.58/");
httpConn = (HttpURLConnection) url.openConnection();
HttpURLConnection.setFollowRedirects(true);
httpConn.setRequestMethod("POST");
httpConn.setRequestProperty("User-Agent","Mozilla/4.0 (compatible; MSIE 6.0; Windows 2000)");
br = new BufferedReader(new InputStreamReader(httpConn.getInputStream(),"UTF-8"));
HttpServletResponse response = ServletActionContext.getResponse();
String inputLine;
while ((inputLine = br.readLine()) != null) {
response.getWriter().print(inputLine);
}
response.getWriter().print((char)chByte);
}catch (MalformedURLException e){
e.printStackTrace();
}catch (IOException e){
e.printStackTrace();
}
finally{
try{
br.close();
httpConn.disconnect();
}catch (Exception ex){
ex.printStackTrace();
}
}
}
6.设置节点的透明度CSS.
filter:alpha(opacity=20);-moz-opacity:0.2;-khtml-opacity: 0.2; opacity: 02;
7.改变图片大小方法
需要手动引入
import com.sun.image.codec.jpeg.JPEGImageEncoder;
import com.sun.image.codec.jpeg.JPEGCodec;
（可能会在未来版本中删除）
public void imageScale(String srcFilePath, String targetFilePath,int width, int height) {
this.imageScale("原始图片路径","转换图片的路径", 宽, 高);
}
public void imageScale(File srcFile, File targetFile, int width, int height) {
try {
Image image = javax.imageio.ImageIO.read(srcFile);
image = image.getScaledInstance(width, height,Image.SCALE_AREA_AVERAGING);
BufferedImage mBufferedImage = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = mBufferedImage.createGraphics();
g2.drawImage(image, 0, 0, width, height, Color.white, null);
g2.dispose();
float[] kernelData2 = { -0.125f, -0.125f, -0.125f, -0.125f, 2,-0.125f, -0.125f, -0.125f, -0.125f };
Kernel kernel = new Kernel(3, 3, kernelData2);
ConvolveOp cOp = new ConvolveOp(kernel, ConvolveOp.EDGE_NO_OP, null);
mBufferedImage = cOp.filter(mBufferedImage, null);
File targetDir = targetFile.getParentFile();
if (!targetDir.exists())
targetDir.mkdirs();
FileOutputStream out = new FileOutputStream(targetFile);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
encoder.encode(mBufferedImage);
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
8.JS获取当前各种日期格式
9.原始JS的放大镜
function zoomBox() {this.index.apply(this, arguments)}
zoomBox.prototype = {
index: function(win,zoom) {
//获得图片窗体
var win=document.getElementById(win);
//获得放大镜窗体
var box=document.getElementById(zoom);
//获得放大镜图片
var img=box.getElementsByTagName('IMG')[0];
//放大镜图片的宽度除以浏览图片的宽度
var zoom=img.width/win.getElementsByTagName('IMG')[0].width;
var h=img.height/win.getElementsByTagName('IMG')[0].height;
//随机数
var z=Math.round(box.offsetWidth/2);
win.onmousemove=function (e){
e = e || window.event;
var x=e.clientX,y=e.clientY, ori=win.getBoundingClientRect();
if (x>ori.right+20||y>ori.bottom+20||x
10.字符串转日期
Date dad=new Date("Thu Apr 05 11:30:39 CST 2012");
SimpleDateFormat simpe=new SimpleDateFormat("yyyy-mm-dd");
System.out.println(simpe.format(dad));
11.下载
String filepath = (String)request.getAttribute("out");
String filename=filepath.split("\\\\")[1];
ServletOutputStream out1=response.getOutputStream();
// 得到文件名字和路径
// 设置响应头和下载保存的文件名
response.setContentType( "APPLICATION/PDF");
response.setHeader( "Content-Disposition","filename="+filename);
// 打开指定文件的流信息
java.io.FileInputStream fileInputStream = new java.io.FileInputStream(filepath);
// 写出流信息
int i;
while((i=fileInputStream.read())!=-1) {
out1.write(i);
}
fileInputStream.close();
out1.close();
12.加密解密
/**
* 加密字符串
*/
public static String ebotongEncrypto(String str) {
String result = str;
if (str != null && str.length() > 0) {
try {
byte[] encodeByte = symmetricEncrypto(str.getBytes(encoding));
result = base64encoder.encode(encodeByte);
} catch (Exception e) {
e.printStackTrace();
}
}
return result;
}
/**
* 对称加密方法
*
* @param byteSource
* 需要加密的数据
* @return 经过加密的数据
* @throws Exception
*/
public static byte[] symmetricEncrypto(byte[] byteSource) throws Exception {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
int mode = Cipher.ENCRYPT_MODE;
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
byte[] keyData = { 1, 9, 8, 2, 0, 8, 2, 1 };
DESKeySpec keySpec = new DESKeySpec(keyData);
Key key = keyFactory.generateSecret(keySpec);
Cipher cipher = Cipher.getInstance("DES");
cipher.init(mode, key);
byte[] result = cipher.doFinal(byteSource);
return result;
} catch (Exception e) {
throw e;
} finally {
baos.close();
}
}
/**
* 对称解密方法
*
* @param byteSource
* 需要解密的数据
* @return 经过解密的数据
* @throws Exception
*/
public static byte[] symmetricDecrypto(byte[] byteSource) throws Exception {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
int mode = Cipher.DECRYPT_MODE;
SecretKeyFactory keyFactory = SecretKeyFactory.getInstance("DES");
byte[] keyData = { 1, 9, 8, 2, 0, 8, 2, 1 };
DESKeySpec keySpec = new DESKeySpec(keyData);
Key key = keyFactory.generateSecret(keySpec);
Cipher cipher = Cipher.getInstance("DES");
cipher.init(mode, key);
byte[] result = cipher.doFinal(byteSource);
return result;
} catch (Exception e) {
throw e;
} finally {
baos.close();
}
}
/**
* 解密字符串
*/
public static String ebotongDecrypto(String str) {
String result = str;
if (str != null && str.length() > 0) {
try {
byte[] encodeByte = base64decoder.decodeBuffer(str);
byte[] decoder = CommonUtils.symmetricDecrypto(encodeByte);
result = new String(decoder, encoding);
} catch (Exception e) {
e.printStackTrace();
}
}
return result;
}
用正则表达式获取数据 替换数据
String hrefs = "asdfsdsdf{dd}dsdfasdfasdf";
Pattern p = Pattern.compile("\\{(.*?)\\}");
Matcher m = p.matcher(hrefs);
String key = "";
while(m.find()) {
key = m.group(1);
hrefs = newHref.replaceAll("(\\{["+key+"\\}]+})", map.get(key).toString());
}
注入属性
public static Object InjectionValue(Object object,ScrollableResults srs){
//获取DTO模板
Class classes = object.getClass();
//获取字段组
Field[] fieldlist = classes.getDeclaredFields();
try{
for (int i = 0; i < fieldlist.length; i++){
Field fld = fieldlist[i];
//拼接set属性方法
StringBuffer name = new StringBuffer();
name.append("set");
name.append(fld.getName().substring(0,1).toUpperCase());
name.append(fld.getName().substring(1));
//获取DTO set方法
Method method = classes.getMethod(name.toString(),new Class[] {fld.getType()});
//拼接srs的get方法
StringBuffer name2 = new StringBuffer();
int length = fld.getType().toString().split("[.]").length;
String methodName = fld.getType().toString().split("[.]")[length-1];
name2.append("get");
name2.append(methodName);
//获取ScrollableResults的get方法
Method srsMethod = srs.getClass().getMethod(name2.toString(), new Class[] {int.class});
//注入值
method.invoke(object,srsMethod.invoke(srs, i));
}
}catch (Exception e) {
e.printStackTrace();
}
return object;
}
Spring 的类型转换器
DefaultConversionService conversionService = new DefaultConversionService();
Integer i = conversionService.convert("5", Integer.class);
System.out.println(i.getClass().getName());
js数组元素的添加和删除一直比较迷惑，今天终于找到详细说明的资料了，先给个我测试的代码^-^
var arr = new Array();
arr[0] = "aaa";
arr[1] = "bbb";
arr[2] = "ccc";
//alert(arr.length);//3
arr.pop();
//alert(arr.length);//2
//alert(arr[arr.length-1]);//bbb
arr.pop();
//alert(arr[arr.length-1]);//aaa
//alert(arr.length);//1
var arr2 = new Array();
//alert(arr2.length);//0
arr2[0] = "aaa";
arr2[1] = "bbb";
//alert(arr2.length);//2
arr2.pop();
//alert(arr2.length);//1
arr2 = arr2.slice(0,arr2.length-1);
//alert(arr2.length);//0
arr2[0] = "aaa";
arr2[1] = "bbb";
arr2[2] = "ccc";
arr2 = arr2.slice(0,1);
alert(arr2.length);//1
alert(arr2[0]);//aaa
alert(arr2[1]);//undefined
shift：删除原数组第一项，并返回删除元素的值；如果数组为空则返回undefined
var a = [1,2,3,4,5];
var b = a.shift(); //a：[2,3,4,5] b：1
unshift：将参数添加到原数组开头，并返回数组的长度
var a = [1,2,3,4,5];
var b = a.unshift(-2,-1); //a：[-2,-1,1,2,3,4,5] b：7
注：在IE6.0下测试返回值总为undefined，FF2.0下测试返回值为7，所以这个方法的返回值不可靠，需要用返回值时可用splice代替本方法来使用。
pop：删除原数组最后一项，并返回删除元素的值；如果数组为空则返回undefined
var a = [1,2,3,4,5];
var b = a.pop(); //a：[1,2,3,4] b：5 //不用返回的话直接调用就可以了
push：将参数添加到原数组末尾，并返回数组的长度
var a = [1,2,3,4,5];
var b = a.push(6,7); //a：[1,2,3,4,5,6,7] b：7
concat：返回一个新数组，是将参数添加到原数组中构成的
var a = [1,2,3,4,5];
var b = a.concat(6,7); //a：[1,2,3,4,5] b：[1,2,3,4,5,6,7]
splice(start,deleteCount,val1,val2,...)：从start位置开始删除deleteCount项，并从该位置起插入val1,val2,...
var a = [1,2,3,4,5];
var b = a.splice(2,2,7,8,9); //a：[1,2,7,8,9,5] b：[3,4]
var b = a.splice(0,1); //同shift
a.splice(0,0,-2,-1); var b = a.length; //同unshift
var b = a.splice(a.length-1,1); //同pop
a.splice(a.length,0,6,7); var b = a.length; //同push
reverse：将数组反序
var a = [1,2,3,4,5];
var b = a.reverse(); //a：[5,4,3,2,1] b：[5,4,3,2,1]
sort(orderfunction)：按指定的参数对数组进行排序
var a = [1,2,3,4,5];
var b = a.sort(); //a：[1,2,3,4,5] b：[1,2,3,4,5]
slice(start,end)：返回从原数组中指定开始下标到结束下标之间的项组成的新数组
var a = [1,2,3,4,5];
var b = a.slice(2,5); //a：[1,2,3,4,5] b：[3,4,5]
join(separator)：将数组的元素组起一个字符串，以separator为分隔符，省略的话则用默认用逗号为分隔符
var a = [1,2,3,4,5];
var b = a.join("|"); //a：[1,2,3,4,5] b："1|2|3|4|5"
再给个利用数组模拟javaStringBuffer处理字符串的方法：
/**
* 字符串处理函数
*/
function StringBuffer()
{
var arr = new Array;
this.append = function(str)
{
arr[arr.length] = str;
};
this.toString = function()
{
return arr.join(""); //把append进来的数组ping成一个字符串
};
}
今天在应用中突然发现join是一种把数组转换成字符串的好方法，故封装成对象使用了：
/**
* 把数组转换成特定符号分割的字符串
*/
function arrayToString(arr,separator)
{
if(!separator) separator = "";//separator为null则默认为空
return arr.join(separator);
}
/**
* 查找数组包含的字符串
*/
function arrayFindString(arr,string)
{
var str = arr.join("");
return str.indexOf(string);
}
Eclipse 改变 包样式
包括Object.class.getResourceAsStream 为null 情况可以加载里面
**/*.java