<%-- 网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> author yeeku.H.lee kongyeeku@163.com version 1.0 Copyright (C), 2001-2016, yeeku.H.Lee This program is protected by copyright laws. Program Name: Date: --%> <%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %> <!-- 导入标签库，指定mytag前缀的标签， 由http://www.crazyit.org/mytaglib的标签库处理 --> <%@ taglib uri="http://www.crazyit.org/mytaglib" prefix="mytag"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>自定义标签示范</title> <meta name="website" content="http://www.crazyit.org" /> </head> <body bgcolor="#ffffc0"> <h2>下面显示的是自定义标签中的内容</h2> <h4>指定两个属性</h4> <mytag:dynaAttr name="crazyit" url="crazyit.org"/><br/> <h4>指定四个属性</h4> <mytag:dynaAttr 书名="疯狂Java讲义" 价格="99.0" 出版时间="2008年" 描述="Java图书"/><br/> </body> </html>
<%-- 网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> author yeeku.H.lee kongyeeku@163.com version 1.0 Copyright (C), 2001-2016, yeeku.H.Lee This program is protected by copyright laws. Program Name: Date: --%> <%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %> <!-- 导入标签库，指定mytag前缀的标签， 由http://www.crazyit.org/mytaglib的标签库处理 --> <%@ taglib uri="http://www.crazyit.org/mytaglib" prefix="mytag"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>自定义标签示范</title> <meta name="website" content="http://www.crazyit.org" /> </head> <body bgcolor="#ffffc0"> <h2>下面显示的是自定义标签中的内容</h2> <mytag:fragment> <jsp:attribute name="fragment"> <%-- 使用jsp:attribute标签传入fragment参数（该注释不能放在fragment内） --> <%-- 下面是动态的JSP页面片段 --%> <mytag:helloWorld/> </jsp:attribute> </mytag:fragment> <br/> <mytag:fragment> <jsp:attribute name="fragment"> <%-- 下面是动态的JSP页面片段 --%> ${pageContext.request.remoteAddr} </jsp:attribute> </mytag:fragment> </body> </html>
<%-- 网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> author yeeku.H.lee kongyeeku@163.com version 1.0 Copyright (C), 2001-2016, yeeku.H.Lee This program is protected by copyright laws. Program Name: Date: --%> <%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %> <!-- 导入标签库，指定mytag前缀的标签， 由URI为http://www.crazyit.org/mytaglib的标签库处理 --> <%@ taglib uri="http://www.crazyit.org/mytaglib" prefix="mytag"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>自定义标签示范</title> <meta name="website" content="http://www.crazyit.org" /> </head> <body bgcolor="#ffffc0"> <h2>下面显示的是自定义标签中的内容</h2> <!-- 使用标签 ，其中mytag是标签前缀，根据taglib的编译指令， mytag前缀将由URI为http://www.crazyit.org/mytaglib的标签库处理 --> <mytag:helloWorld/><br/> </body> </html>
<%-- 网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> author yeeku.H.lee kongyeeku@163.com version 1.0 Copyright (C), 2001-2016, yeeku.H.Lee This program is protected by copyright laws. Program Name: Date: --%> <%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %> <%@ page import="java.util.*"%> <!-- 导入标签库，指定mytag前缀的标签， 由http://www.crazyit.org/mytaglib的标签库处理 --> <%@ taglib uri="http://www.crazyit.org/mytaglib" prefix="mytag"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title> 带标签体的标签-迭代器标签 </title> <meta name="website" content="http://www.crazyit.org" /> </head> <body> <h2>带标签体的标签-迭代器标签</h2><hr/> <% //创建一个List对象 List<String> a = new ArrayList<String>(); a.add("疯狂Java"); a.add("www.crazyit.org"); a.add("www.fkit.org"); //将List对象放入page范围内 pageContext.setAttribute("a" , a); %> <table border="1" bgcolor="#aaaadd" width="300"> <!-- 使用迭代器标签，对a集合进行迭代 --> <mytag:iterator collection="a" item="item"> <tr> <td>${pageScope.item}</td> <tr> </mytag:iterator> </table> </body> </html>
<%-- 网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> author yeeku.H.lee kongyeeku@163.com version 1.0 Copyright (C), 2001-2016, yeeku.H.Lee This program is protected by copyright laws. Program Name: Date: --%> <%@ page contentType="text/html; charset=GBK" language="java" errorPage="" %> <!-- 导入标签库，指定mytag前缀的标签， 由http://www.crazyit.org/mytaglib的标签库处理 --> <%@ taglib uri="http://www.crazyit.org/mytaglib" prefix="mytag"%> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>自定义标签示范</title> <meta name="website" content="http://www.crazyit.org" /> </head> <body bgcolor="#ffffc0"> <h2>下面显示的是查询标签的结果</h2> <!-- 使用标签 ，其中mytag是标签前缀，根据taglib的编译指令， mytag前缀将由http://www.crazyit.org/mytaglib的标签库处理 --> <mytag:query driver="com.mysql.jdbc.Driver" url="jdbc:mysql://localhost:3306/javaee" user="root" pass="32147" sql="select * from news_inf"/><br/> </body> </html>
<?xml version="1.0" encoding="GBK"?> <!-- 定义生成文件的project根元素，默认的target为空 --> <project name="web" basedir="." default=""> <!-- 定义三个简单属性 --> <property name="src" value="src"/> <property name="classes" value="classes"/> <!-- 定义一组文件和目录集 --> <path id="classpath"> <fileset dir="lib"> <include name="**/*.jar"/> </fileset> <pathelement path="${classes}"/> </path> <!-- 定义compile target，用于编译Java源文件 --> <target name="compile" description="编译Java源文件"> <!-- 先删除classes属性所代表的文件夹 --> <delete dir="${classes}"/> <!-- 创建classes属性所代表的文件夹 --> <mkdir dir="${classes}"/> <copy todir="${classes}"> <fileset dir="${src}"> <exclude name="**/*.java"/> </fileset> </copy> <!-- 编译Java文件，编译后的class文件放到classes属性所代表的文件夹内 --> <javac destdir="${classes}" debug="true" includeantruntime="yes" deprecation="false" optimize="false" failonerror="true"> <!-- 指定需要编译的Java文件所在的位置 --> <src path="${src}"/> <!-- 指定编译Java文件所需要第三方类库所在的位置 --> <classpath refid="classpath"/> </javac> </target> </project>
<?xml version="1.0" encoding="GBK"?> <web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" version="3.1"> </web-app>
<?xml version="1.0" encoding="GBK"?> <taglib xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-jsptaglibrary_2_0.xsd" version="2.0"> <tlib-version>1.0</tlib-version> <short-name>mytaglib</short-name> <!-- 定义该标签库的URI --> <uri>http://www.crazyit.org/mytaglib</uri> <!-- 定义第一个标签 --> <tag> <!-- 定义标签名 --> <name>helloWorld</name> <!-- 定义标签处理类 --> <tag-class>lee.HelloWorldTag</tag-class> <!-- 定义标签体为空 --> <body-content>empty</body-content> </tag> <!-- 定义第二个标签 --> <tag> <!-- 定义标签名 --> <name>query</name> <!-- 定义标签处理类 --> <tag-class>lee.QueryTag</tag-class> <!-- 定义标签体为空 --> <body-content>empty</body-content> <!-- 配置标签属性:driver --> <attribute> <name>driver</name> <required>true</required> <fragment>true</fragment> </attribute> <!-- 配置标签属性:url --> <attribute> <name>url</name> <required>true</required> <fragment>true</fragment> </attribute> <!-- 配置标签属性:user --> <attribute> <name>user</name> <required>true</required> <fragment>true</fragment> </attribute> <!-- 配置标签属性:pass --> <attribute> <name>pass</name> <required>true</required> <fragment>true</fragment> </attribute> <!-- 配置标签属性:sql --> <attribute> <name>sql</name> <required>true</required> <fragment>true</fragment> </attribute> </tag> <!-- 定义第三个标签 --> <tag> <!-- 定义标签名 --> <name>iterator</name> <!-- 定义标签处理类 --> <tag-class>lee.IteratorTag</tag-class> <!-- 定义标签体不允许出现JSP脚本 --> <body-content>scriptless</body-content> <!-- 配置标签属性:collection --> <attribute> <name>collection</name> <required>true</required> <fragment>true</fragment> </attribute> <!-- 配置标签属性:item --> <attribute> <name>item</name> <required>true</required> <fragment>true</fragment> </attribute> </tag> <tag> <!-- 定义标签名 --> <name>fragment</name> <!-- 定义标签处理类 --> <tag-class>lee.FragmentTag</tag-class> <!-- 指定该标签不支持标签体 --> <body-content>empty</body-content> <!-- 定义标签属性：fragment --> <attribute> <name>fragment</name> <required>true</required> <fragment>true</fragment> </attribute> </tag> <!-- 定义接受动态属性的标签 --> <tag> <name>dynaAttr</name> <tag-class>lee.DynaAttributesTag</tag-class> <body-content>empty</body-content> <!-- 指定支持动态属性 --> <dynamic-attributes>true</dynamic-attributes> </tag> </taglib>
<?xml version="1.0" encoding="GBK"?> <taglib xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-jsptaglibrary_2_1.xsd" version="2.1"> <tlib-version>1.0</tlib-version> <short-name>mytaglib</short-name> <!-- 定义该标签库的URI --> <uri>http://www.crazyit.org/mytaglib</uri> <!-- 定义第一个标签 --> <tag> <!-- 定义标签名 --> <name>helloWorld</name> <!-- 定义标签处理类 --> <tag-class>lee.HelloWorldTag</tag-class> <!-- 定义标签体为空 --> <body-content>empty</body-content> </tag> <!-- 定义第二个标签 --> <tag> <!-- 定义标签名 --> <name>query</name> <!-- 定义标签处理类 --> <tag-class>lee.QueryTag</tag-class> <!-- 定义标签体为空 --> <body-content>empty</body-content> <!-- 配置标签属性:driver --> <attribute> <name>driver</name> <required>true</required> <fragment>true</fragment> </attribute> <!-- 配置标签属性:url --> <attribute> <name>url</name> <required>true</required> <fragment>true</fragment> </attribute> <!-- 配置标签属性:user --> <attribute> <name>user</name> <required>true</required> <fragment>true</fragment> </attribute> <!-- 配置标签属性:pass --> <attribute> <name>pass</name> <required>true</required> <fragment>true</fragment> </attribute> <!-- 配置标签属性:sql --> <attribute> <name>sql</name> <required>true</required> <fragment>true</fragment> </attribute> </tag> <!-- 定义第三个标签 --> <tag> <!-- 定义标签名 --> <name>iterator</name> <!-- 定义标签处理类 --> <tag-class>lee.IteratorTag</tag-class> <!-- 定义标签体不允许出现JSP脚本 --> <body-content>scriptless</body-content> <!-- 配置标签属性:collection --> <attribute> <name>collection</name> <required>true</required> <fragment>true</fragment> </attribute> <!-- 配置标签属性:item --> <attribute> <name>item</name> <required>true</required> <fragment>true</fragment> </attribute> </tag> <tag> <!-- 定义标签名 --> <name>fragment</name> <!-- 定义标签处理类 --> <tag-class>lee.FragmentTag</tag-class> <!-- 指定该标签不支持标签体 --> <body-content>empty</body-content> <!-- 定义标签属性：fragment --> <attribute> <name>fragment</name> <required>true</required> <fragment>true</fragment> </attribute> </tag> <!-- 定义接受动态属性的标签 --> <tag> <name>dynaAttr</name> <tag-class>lee.DynaAttributesTag</tag-class> <body-content>empty</body-content> <!-- 指定支持动态属性 --> <dynamic-attributes>true</dynamic-attributes> </tag> </taglib>
package lee; import javax.servlet.jsp.tagext.*; import javax.servlet.jsp.*; import java.io.*; import java.util.*; /** * Description: * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee * <br/>This program is protected by copyright laws. * <br/>Program Name: * <br/>Date: * @author Yeeku.H.Lee kongyeeku@163.com * @version 1.0 */ public class DynaAttributesTag extends SimpleTagSupport implements DynamicAttributes { // 保存每个属性名的集合 private ArrayList<String> keys = new ArrayList<String>(); // 保存每个属性值的集合 private ArrayList<Object> values = new ArrayList<Object>(); @Override public void doTag() throws JspException, IOException { JspWriter out = getJspContext().getOut(); // 此处只是简单地输出每个属性 out.println("<ol>"); for( int i = 0; i < keys.size(); i++ ) { String key = keys.get( i ); Object value = values.get( i ); out.println( "<li>" + key + " = " + value + "</li>" ); } out.println("</ol>"); } @Override public void setDynamicAttribute( String uri, String localName, Object value )throws JspException { // 添加属性名 keys.add( localName ); // 添加属性值 values.add( value ); } }
package lee; import javax.servlet.jsp.tagext.*; import javax.servlet.jsp.*; import java.io.*; /** * Description: * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee * <br/>This program is protected by copyright laws. * <br/>Program Name: * <br/>Date: * @author Yeeku.H.Lee kongyeeku@163.com * @version 1.0 */ public class FragmentTag extends SimpleTagSupport { private JspFragment fragment; // fragment的setter和getter方法 public void setFragment(JspFragment fragment) { this.fragment = fragment; } public JspFragment getFragment() { return this.fragment; } @Override public void doTag() throws JspException, IOException { JspWriter out = getJspContext().getOut(); out.println("<div style='padding:10px;border:1px solid black;" + ";border-radius:20px'>"); out.println("<h3>下面是动态传入的JSP片段</h3>"); // 调用、输出“页面片段” fragment.invoke( null ); out.println("</div"); } }
package lee; import javax.servlet.jsp.tagext.*; import javax.servlet.jsp.*; import java.io.*; /** * Description: * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee * <br/>This program is protected by copyright laws. * <br/>Program Name: * <br/>Date: * @author Yeeku.H.Lee kongyeeku@163.com * @version 1.0 */ public class HelloWorldTag extends SimpleTagSupport { // 重写doTag()方法，该方法为标签生成页面内容 public void doTag()throws JspException, IOException { // 获取页面输出流，并输出字符串 getJspContext().getOut().write("Hello World " + new java.util.Date()); } }
package lee; import javax.servlet.jsp.tagext.*; import javax.servlet.jsp.*; import java.io.*; import java.sql.*; import java.util.*; /** * Description: * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee * <br/>This program is protected by copyright laws. * <br/>Program Name: * <br/>Date: * @author Yeeku.H.Lee kongyeeku@163.com * @version 1.0 */ public class IteratorTag extends SimpleTagSupport { // 标签属性，用于指定需要被迭代的集合 private String collection; // 标签属性，指定迭代集合元素，为集合元素指定的名称 private String item; // collection的setter和getter方法 public void setCollection(String collection) { this.collection = collection; } public String getCollection() { return this.collection; } // item的setter和getter方法 public void setItem(String item) { this.item = item; } public String getItem() { return this.item; } // 标签的处理方法，标签处理类只需要重写doTag()方法 public void doTag() throws JspException, IOException { // 从page scope中获取名为collection的集合 Collection itemList = (Collection)getJspContext(). getAttribute(collection); // 遍历集合 for (Object s : itemList) { // 将集合的元素设置到page范围内 getJspContext().setAttribute(item, s ); // 输出标签体 getJspBody().invoke(null); } } }
package lee; import javax.servlet.jsp.tagext.*; import javax.servlet.jsp.*; import java.io.*; import java.sql.*; /** * Description: * <br/>网站: <a href="http://www.crazyit.org">疯狂Java联盟</a> * <br/>Copyright (C), 2001-2016, Yeeku.H.Lee * <br/>This program is protected by copyright laws. * <br/>Program Name: * <br/>Date: * @author Yeeku.H.Lee kongyeeku@163.com * @version 1.0 */ public class QueryTag extends SimpleTagSupport { // 定义成员变量来代表标签的属性 private String driver; private String url; private String user; private String pass; private String sql; // driver的setter和getter方法 public void setDriver(String driver) { this.driver = driver; } public String getDriver() { return this.driver; } // url的setter和getter方法 public void setUrl(String url) { this.url = url; } public String getUrl() { return this.url; } // user的setter和getter方法 public void setUser(String user) { this.user = user; } public String getUser() { return this.user; } // pass的setter和getter方法 public void setPass(String pass) { this.pass = pass; } public String getPass() { return this.pass; } // sql的setter和getter方法 public void setSql(String sql) { this.sql = sql; } public String getSql() { return this.sql; } // conn的setter和getter方法 public void setConn(Connection conn) { this.conn = conn; } public Connection getConn() { return this.conn; } // stmt的setter和getter方法 public void setStmt(Statement stmt) { this.stmt = stmt; } public Statement getStmt() { return this.stmt; } // rs的setter和getter方法 public void setRs(ResultSet rs) { this.rs = rs; } public ResultSet getRs() { return this.rs; } // rsmd的setter和getter方法 public void setRsmd(ResultSetMetaData rsmd) { this.rsmd = rsmd; } public ResultSetMetaData getRsmd() { return this.rsmd; } // 执行数据库访问的对象 private Connection conn = null; private Statement stmt = null; private ResultSet rs = null; private ResultSetMetaData rsmd = null; public void doTag()throws JspException, IOException { try { // 注册驱动 Class.forName(driver); // 获取数据库连接 conn = DriverManager.getConnection(url,user,pass); // 创建Statement对象 stmt = conn.createStatement(); // 执行查询 rs = stmt.executeQuery(sql); rsmd = rs.getMetaData(); // 获取列数目 int columnCount = rsmd.getColumnCount(); // 获取页面输出流 Writer out = getJspContext().getOut(); // 在页面输出表格 out.write("<table border='1' bgColor='#9999cc' width='400'>"); // 遍历结果集 while (rs.next()) { out.write("<tr>"); // 逐列输出查询到的数据 for (int i = 1 ; i <= columnCount ; i++ ) { out.write("<td>"); out.write(rs.getString(i)); out.write("</td>"); } out.write("</tr>"); } } catch(ClassNotFoundException cnfe) { cnfe.printStackTrace(); throw new JspException("自定义标签错误" + cnfe.getMessage()); } catch (SQLException ex) { ex.printStackTrace(); throw new JspException("自定义标签错误" + ex.getMessage()); } finally { // 关闭结果集 try { if (rs != null) rs.close(); if (stmt != null) stmt.close(); if (conn != null) conn.close(); } catch (SQLException sqle) { sqle.printStackTrace(); } } } }