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这个工程主要用来研究log4j，所以就只有一个页面，希望以后慢慢进步。
java动态生成网页主要使用servlet。把请求拦截下来，处理后返回结果。
这里创建的是一个maven工程。 结构如下：
因为是部署在tomcat容器中，所以需要配置 web.xml，主要处理逻辑在HelloWorldController.java，spring-context-config.xml 里面是spring的配置，主要是开包扫描加载controller的注解。
下面是例行的贴代码：
1 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 2 xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> 3 <modelVersion>4.0.0</modelVersion> 4 <groupId>me.demo</groupId> 5 <artifactId>test-web-app</artifactId> 6 <packaging>war</packaging> 7 <version>1.0-SNAPSHOT</version> 8 <name>TestWebApp</name> 9 <url>http://maven.apache.org</url> 10 <dependencies> 11 <dependency> 12 <groupId>junit</groupId> 13 <artifactId>junit</artifactId> 14 <version>4.8.2</version> 15 <scope>test</scope> 16 </dependency> 17 18 19 <dependency> 20 <groupId>org.springframework</groupId> 21 <artifactId>spring-core</artifactId> 22 <version>4.1.4.RELEASE</version> 23 </dependency> 24 <!-- 添加spring-context包 --> 25 <dependency> 26 <groupId>org.springframework</groupId> 27 <artifactId>spring-context</artifactId> 28 <version>4.1.4.RELEASE</version> 29 </dependency> 30 <!-- 添加spring-tx包 --> 31 <dependency> 32 <groupId>org.springframework</groupId> 33 <artifactId>spring-tx</artifactId> 34 <version>4.1.4.RELEASE</version> 35 </dependency> 36 <!-- 添加spring-jdbc包 --> 37 <dependency> 38 <groupId>org.springframework</groupId> 39 <artifactId>spring-jdbc</artifactId> 40 <version>4.1.4.RELEASE</version> 41 </dependency> 42 <!-- 为了方便进行单元测试，添加spring-test包 --> 43 <dependency> 44 <groupId>org.springframework</groupId> 45 <artifactId>spring-test</artifactId> 46 <version>4.1.4.RELEASE</version> 47 </dependency> 48 <!--添加spring-web包 --> 49 <dependency> 50 <groupId>org.springframework</groupId> 51 <artifactId>spring-web</artifactId> 52 <version>4.1.4.RELEASE</version> 53 </dependency> 54 <!--添加aspectjweaver包 --> 55 <dependency> 56 <groupId>org.aspectj</groupId> 57 <artifactId>aspectjweaver</artifactId> 58 <version>1.8.5</version> 59 </dependency> 60 <!-- 添加mybatis的核心包 --> 61 <dependency> 62 <groupId>org.mybatis</groupId> 63 <artifactId>mybatis</artifactId> 64 <version>3.2.8</version> 65 </dependency> 66 <!-- 添加mybatis与Spring整合的核心包 --> 67 <dependency> 68 <groupId>org.mybatis</groupId> 69 <artifactId>mybatis-spring</artifactId> 70 <version>1.2.2</version> 71 </dependency> 72 <!-- 添加servlet3.0核心包 --> 73 <dependency> 74 <groupId>javax.servlet</groupId> 75 <artifactId>javax.servlet-api</artifactId> 76 <version>3.0.1</version> 77 </dependency> 78 <dependency> 79 <groupId>javax.servlet.jsp</groupId> 80 <artifactId>javax.servlet.jsp-api</artifactId> 81 <version>2.3.2-b01</version> 82 </dependency> 83 <!-- jstl --> 84 <dependency> 85 <groupId>javax.servlet</groupId> 86 <artifactId>jstl</artifactId> 87 <version>1.2</version> 88 </dependency> 89 <!-- ODBC14 --> 90 <dependency> 91 <groupId>com.oracle</groupId> 92 <artifactId>ojdbc14</artifactId> 93 <version>10.2.0.1.0</version> 94 </dependency> 95 <!-- DBCP包 --> 96 <dependency> 97 <groupId>commons-dbcp</groupId> 98 <artifactId>commons-dbcp</artifactId> 99 <version>1.4</version> 100 </dependency> 101 <!-- 添加druid连接池包 --> 102 <dependency> 103 <groupId>com.alibaba</groupId> 104 <artifactId>druid</artifactId> 105 <version>1.0.12</version> 106 </dependency> 107 108 <dependency> 109 <groupId>log4j</groupId> 110 <artifactId>log4j</artifactId> 111 <version>1.2.9</version> 112 </dependency> 113 <dependency> 114 <groupId>org.apache.maven.plugins</groupId> 115 <artifactId>maven-resources-plugin</artifactId> 116 <version>2.4.3</version> 117 </dependency> 118 </dependencies> 119 <build> 120 <finalName>TestWebApp</finalName> 121 <plugins> 122 <plugin> 123 <groupId>org.apache.maven.plugins</groupId> 124 <artifactId>maven-compiler-plugin</artifactId> 125 <configuration> 126 <source>1.6</source> 127 <target>1.6</target> 128 </configuration> 129 </plugin> 130 </plugins> 131 </build> 132 </project>
1 <?xml version="1.0" encoding="UTF-8"?> 2 <web-app xmlns="http://java.sun.com/xml/ns/javaee" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 5 http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" 6 version="3.0"> 7 <!-- icon --> 8 <!-- display-name --> 9 <display-name>TestWebApp</display-name> 10 <!-- context-param --> 11 <context-param> 12 <param-name>contextConfigLocation</param-name> 13 <param-value>classpath*:spring-context-config.xml</param-value> 14 </context-param> 15 <!-- filter --> 16 <!--<servlet>--> 17 <!--<servlet-name>HelloWorld</servlet-name>--> 18 <!--<servlet-class>me.demo.controller.HelloWorldController</servlet-class>--> 19 <!--</servlet>--> 20 <!--<servlet-mapping>--> 21 <!--<servlet-name>HelloWorld</servlet-name>--> 22 <!--<url-pattern>/HelloWorld</url-pattern>--> 23 <!--</servlet-mapping>--> 24 <filter> 25 <filter-name>encodingFilter</filter-name> 26 <filter-class> 27 org.springframework.web.filter.CharacterEncodingFilter 28 </filter-class> 29 <init-param> 30 <param-name>encoding</param-name> 31 <param-value>utf-8</param-value> 32 </init-param> 33 </filter> 34 <!-- filter-mapping --> 35 <filter-mapping> 36 <filter-name>encodingFilter</filter-name> 37 <url-pattern>/*</url-pattern> 38 </filter-mapping> 39 <!-- listener servlet --> 40 <listener> 41 <description>Spring监听器</description> 42 <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class> 43 </listener> 44 <!-- servlet --> 45 <!-- servlet-mapping --> 46 <!-- session-config --> 47 <!-- mime-mapping --> 48 <!-- welcom-file-list --> 49 <welcome-file-list> 50 <welcome-file>HelloWorld</welcome-file> 51 </welcome-file-list> 52 <!-- error-page --> 53 <!-- taglib --> 54 <!-- resource-env-ref --> 55 <!-- resource-ref --> 56 <!-- security-constraint --> 57 <!-- login-config --> 58 <!-- security-role--> 59 <!-- env-entry --> 60 <!-- ejb-ref --> 61 <!-- ejb-local-ref --> 62 </web-app>
1 package me.demo.controller; 2 3 import java.io.IOException; 4 import javax.servlet.ServletException; 5 import javax.servlet.annotation.WebServlet; 6 import javax.servlet.http.HttpServlet; 7 import javax.servlet.http.HttpServletRequest; 8 import javax.servlet.http.HttpServletResponse; 9 10 import org.apache.commons.logging.Log; 11 import org.apache.commons.logging.LogFactory; 12 13 /** 14 * Created by bl05973 on 2015/12/15. 15 */ 16 @WebServlet("/HelloWorld") 17 public class HelloWorldController extends HttpServlet { 18 Log logger = LogFactory.getLog(HttpServlet.class); 19 20 public void run(String param) { 21 System.out.println("[Sysout]"+param); 22 logger.info("[run] param is" + param); 23 } 24 25 public void run() { 26 run("null"); 27 } 28 29 public void doGet(HttpServletRequest request, HttpServletResponse response) 30 throws ServletException, IOException { 31 run(); 32 request.getRequestDispatcher("/HelloWorld.jsp").forward(request, response); 33 } 34 public void doPost(HttpServletRequest request, HttpServletResponse response) 35 throws ServletException, IOException { 36 String param = request.getParameter("param"); 37 run(param); 38 request.getRequestDispatcher("/HelloWorld.jsp").forward(request, response); 39 } 40 41 public void init() { 42 logger.info("init ----------------------------------------------------------------------"); 43 } 44 }
1 <?xml version="1.0" encoding="UTF-8"?> 2 <beans xmlns="http://www.springframework.org/schema/beans" 3 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 4 xmlns:context="http://www.springframework.org/schema/context" 5 xsi:schemaLocation="http://www.springframework.org/schema/beans 6 http://www.springframework.org/schema/beans/spring-beans.xsd 7 http://www.springframework.org/schema/context 8 http://www.springframework.org/schema/context/spring-context-3.0.xsd"> 9 <!-- 对 me.demo.service 的包扫描 --> 10 <context:component-scan base-package="me.demo.service" /> 11 </beans>
1 <%-- 2 Created by IntelliJ IDEA. 3 User: bl05973 4 Date: 2015/12/15 5 Time: 15:19 6 To change this template use File | Settings | File Templates. 7 --%> 8 <%@ page contentType="text/html;charset=UTF-8" language="java" %> 9 <html> 10 <head> 11 <title>HelloWorld</title> 12 <script type="text/javascript"> 13 <!-- 14 function jump(target) { 15 window.location.href = target; 16 } 17 --> 18 </script> 19 </head> 20 <body> 21 Hello World! 22 <form method="post" target="/HelloWorld" > 23 <input name="param" type="text" /> 24 <input type="submit"> 25 </form> 26 </body> 27 </html>
运行的主要流程就是HelloWorldController 里面重写了 doGet 和 doPost 方法，tomcat拿到 /HelloWorld 的请求会交给这个controller来处理。然后他处理完后台逻辑，会在最后一句的时候加载 HelloWorld.jsp模板，然后展示出来。
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原文地址：http://www.cnblogs.com/Phantom01/p/5049411.html
