摘要： ${sa } % List list=new ArrayList(); list.add(new Person("aa")); list.add(new Person("bb")); list.add(new Person("cc")); request.setAttribute("slist", 阅读全文

摘要：package com.wzh.test.domain; import java.math.BigDecimal; public class CalculatorBean { private String firstNumber="0"; private char operator; private String secondNumber=" 阅读全文

摘要： 阅读全文

摘要：package com.wzh.test; import java.math.BigDecimal; public class test { 阅读全文

摘要： kk 阅读全文

摘要： index.jsp java.lang.ArithmeticException /errors/error 阅读全文

摘要：package org.apache.jsp; import javax.servlet.*; import javax.servlet.http.*; import javax.servlet.jsp.*; import java.util.*; public final class index_jsp extends org.apache.jasper.runtime.HttpJspBase implements org.apache.jasper.runtime.JspSourceDependent { public void a(){} static{System.out.println("static");} private static final javax.servlet.jsp.JspFactory _jspxFactory = javax.servlet.jsp.JspFactory.getDefaultFactory(); private static java.util.List 阅读全文

摘要：package org.apache.jsp; import javax.servlet.*; import javax.servlet.http.*; import javax.servlet.jsp.*; import java.util.*; public final class index_jsp extends org.apache.jasper.runtime.HttpJspBase implements org.apache.jasper.runtime.JspSourceDependent { 阅读全文

摘要：1.当浏览器禁用cookeis时将无法获取到session，需要通过response.encodeURL方法将jsessionid写到链接，通过地址传给服务器。 request.getSession(); //通过encodeURL方法将jsessionid放入地址 String url1=response.encodeURL("/day06/servlet/requestDemo"); String url2=response.encodeURL("/day06/servlet/requestPay"); 阅读全文

摘要：//解决GET提交乱码 String s=new String(user.getUsername()[0].getBytes("iso8859-1"),"UTF-8"); //解决POST提交乱码 request.setCharacterEncoding("UTF-8"); 阅读全文

摘要：public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { BufferedImage image = new BufferedImage(100, 100, BufferedImage.TYPE_INT_RGB); Graphics g = image.getGraphics(); // 1.设置背景色 setBackGround(g); // 2.设置边框 setBorder(g); // 3.画干扰线 drawRandomLine(g); // 4.写随机数 drawRandomNum(g); // 5.图形写给浏览器 response.setContentType("image/jpeg"); ImageIO.write(image, "jpg", response.getOutputStream 阅读全文

摘要：public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { String value="aaaa"; this.getServletContext().setAttribute("data", value); request.setAttribute("value", value); this.getServletContext().getRequestDispatcher("/1.jsp").forward(request, response); } 阅读全文

摘要：public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.addHeader("content-disposition", "attachment;filename=3.jpg"); InputStream in=this.getServletContext().getResourceAsStream("/hadoop.jpg"); int len=0; byte buffer[]=new byte[1024]; OutputStream out=response.getOutputStream(); while((len=in.read(buffer))>0){ out.write(buffer,0,len); 阅读全文

摘要：请求头：用于告诉服务器，客户机支持的数据类型 accept-charset:用于告诉服务器，客户机采用的编码 accept-Encoding:用于告诉服务器，客户机支持的数据压缩格式 Host:客户机通过这个头告诉服务器，想访问的主机名 Referer:客户机通过这个头告诉服务器，它是从哪个资源来访问服务器的(防盗链) User-Agent:客户机通过这个头告诉服务器，客户机的 阅读全文

摘要：package com.wzh.test.http; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.net.MalformedURLException; import java.net.URL; import java.net.URLConnection; public class RangeDemo { 阅读全文

摘要：需要通过使用Microsoft Visual Studio 2010、XMLSpy或者eclipse软件来检查校验 book.dtd 阅读全文

摘要：package com.wzh.test.introspector; import java.beans.BeanInfo; import java.beans.IntrospectionException; import java.beans.Introspector; import java.beans.PropertyDescriptor; import java.lang.reflect.Method; import org.junit.Test; //使用内省API操作Bean的属性 public class Demo1 { @Test public void test() throws Exception{ // BeanInfo info=Introspector.getBeanInfo(Person.class); // BeanInfo info=Introspector.getBeanInfo(Class.forName("com.wzh.test.introspector.Person")); BeanInfo 阅读全文

摘要：package com.wzh.test.enum1; import org.junit.Test; public class demo1 { @Test public void test2(){ System.out.println(Ab.c.name()); System.out.println(Ab.a.ordinal()); String str="b"; Ab a=Ab.valueOf(str); System.out.println(a); Ab arr[]= Ab.values(); for(Ab ab : arr){ System.out.println(ab); } } @Test public void testAb() { System.out.println(Ab.b.localValue()); System.out.println(Ab.values()); } // 带抽象方法的枚举 enum Ab { a 阅读全文

摘要：1.SAX事件解析 package com.wzh.sax; import org.xml.sax.Attributes; import org.xml.sax.SAXException; 阅读全文

摘要：WorkIF.java package com.wzh.test; public interface WorkIf { void doWork(String name); } 阅读全文