原创框架（参考struts）

configure.xml文件：

   该文件主要是框架的配置文件，包括Action，Form（本来准备把JDBC连接池和类Spring IOC的内容也添上的，不过没什么时间了）

   有点类似struts-config.xml文件，我写这个的时候，考虑了一下Struts2.x，form-bean干脆改成了pojo了，只需要配置需要填充的属性，这样就比较轻了。然后pojo又可以做持久化对象使用，复用性也比较好。（后来我写了一个Leave Message的实例，可以看看）

配置文件就这么多了。

   

 <?xml version="1.0" encoding="utf-8"?>
 <view-config>
         <!本来是为Connection Pool用的，时间关系，没写连接池了。-->
     <jdbc-config>
         <driver-class-name>com.mysql.jdbc.Driver</driver-class-name>
         <url>jdbc:mysql://localhost:3306/westdream</url>
         <user>root</user>
         <password>123456</password>
         <max-active>20</max-active>
         <max-wait>3600</max-wait>
     </jdbc-config>
     <view>
       <forms>
          <form name="userInfo" class="com.westdream.pojo.Userinfo" >
         <property name="userName" type="java.lang.String" />
         <property name="userPwd"  type="java.lang.String" />
           </form>
           <form name="message" class="com.westdream.pojo.Message" >
          <property name="title" type="java.lang.String" />
          <property name="content" type="java.lang.String" />
           </form>
        </forms>
     <action name="userInfo" path="/user" class="com.westdream.action.UserAction" >
        <result name="success" type="true" path="/success.jsp" />
        <result name="failure" type="true" path="/failure.jsp" />
     </action>
     <action name="message" path="/msg" class="com.westdream.action.MessageAction" >
        <result name="success" type="true" path="/listMsg.go" />
        <result name="failure" type="true" path="/failure.jsp" />
     </action>
     <action path="/listMsg" class="com.westdream.action.ListMessageAction" >
       <result name="list" type="true" path="/list.jsp" />
     </action>
     </view>
 </view-config>

 

ActionServlet.java文件：

   ActionServlet的工作主要是加载配置文件，处理请求，根据请求转发到相应的Action上，然后根据Action返回的值，跳转到相应jsp页面。ActionServlet在init方法中调用initConfig方法加载configure.xml到内存（使用JDOM，后面介绍），doGet,doPost内执行同一个方法process。现在具体看一下process方法，截取request URI再从ActionConfig中找到相应的Action，执行Action中的execute方法，根据返回值进行转发。整个过程比较简单，这里还有一点bug，就是跳转类型只有一个forward（redirect忘记处理了，但加载了相应的配置）。这里不多说了

   

 package com.westdream;

 import java.io.IOException;
 import java.lang.reflect.InvocationTargetException;
 import java.lang.reflect.Method;
 import java.util.List;

 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;


 import com.westdream.action.Action;
 import com.westdream.config.ActionConfig;
 import com.westdream.config.Configuration;
 import com.westdream.config.FormConfig;
 import com.westdream.config.PropertyConfig;
 import com.westdream.config.ResultConfig;


 public class ActionServlet extends HttpServlet {

     private static final long serialVersionUID = 5852463410268904006L;
     /** 配置文件，默认为CLASSPATH **/
     public static final String CONFIG_FILE = "configure.xml";
     private Configuration config = null;

     public ActionServlet() {

     }

     protected void doGet(HttpServletRequest request,
             HttpServletResponse response) throws ServletException, IOException {
         process(request, response);
     }

     protected void doPost(HttpServletRequest request,
             HttpServletResponse response) throws ServletException, IOException {
         process(request, response);
     }

     @Override
     public void init() throws ServletException {
         initConfig();
     }

     protected void process(HttpServletRequest request,
             HttpServletResponse response) throws ServletException, IOException {
         String requestURI = request.getRequestURI();
         ActionConfig actionConfig = config.getActionMappings().get(parseURI(requestURI));
         try {
             Action act = (Action)Class.forName(actionConfig.getClassName()).newInstance();
             Object data = null;
             if(actionConfig.getName() != null) {
                 data = getFormObject(config.getFormMappings().get(actionConfig.getName()),request);
             }
             String result = act.execute(request, response, data);
             ResultConfig resultConfig = actionConfig.getResults().get(result);
             request.getRequestDispatcher(resultConfig.getPath()).forward(request, response);
         } catch (ClassNotFoundException e) {
             e.printStackTrace();
         } catch (InstantiationException e) {
             e.printStackTrace();
         } catch (IllegalAccessException e) {
             e.printStackTrace();
         } catch (IllegalArgumentException e) {
             e.printStackTrace();
         }
     }

     protected void initConfig() {
          config = Configuration.newInstance().configure(getServletContext());
     }

     @Override
     public void destroy() {

     }

     /** 解析URI **/
     protected String parseURI(String uri) {
         return uri.substring(0, uri.lastIndexOf("."));
     }

     /** 将form表单的数据封装成相应的Object **/
     protected Object getFormObject(FormConfig formConfig, HttpServletRequest request) {
         /** 如果配置相应的表单，则返回空 **/
         if(formConfig == null)
             return null;
         List<PropertyConfig> props = formConfig.getProperties();
         Object obj = null;
          try {
             obj  = Class.forName(formConfig.getClassName()).newInstance();
             for(PropertyConfig prop : props) {
                 StringBuilder methodName = new StringBuilder("set" + prop.getName());
                 methodName.setCharAt(3, Character.toUpperCase(methodName.charAt(3)));
                 Class<?> typeClass = Class.forName(prop.getType());
                 Method method = obj.getClass().getMethod(methodName.toString(), typeClass);
                 method.invoke(obj, new Object[]{request.getParameter(prop.getName())});
             }
         } catch (ClassNotFoundException e) {
             e.printStackTrace();
         } catch (SecurityException e) {
             e.printStackTrace();
         } catch (NoSuchMethodException e) {
             e.printStackTrace();
         } catch (IllegalArgumentException e) {
             e.printStackTrace();
         } catch (IllegalAccessException e) {
             e.printStackTrace();
         } catch (InvocationTargetException e) {
             e.printStackTrace();
         } catch (InstantiationException e) {
             e.printStackTrace();
         }
         return obj;
     }
 }

 

Configuration.java文件：

Configuration类主要是利用SAX解析configure.xml，然后加载到相应的配置类中，如ActionConfig,FormConfig等，这里用了JDOM

的包，看看源代码就知道了，很简单。

 package com.westdream.config;

 import java.io.IOException;
 import java.io.Serializable;
 import java.util.HashMap;
 import java.util.List;

 import javax.servlet.ServletContext;

 import org.jdom.Attribute;
 import org.jdom.Document;
 import org.jdom.Element;
 import org.jdom.JDOMException;
 import org.jdom.input.SAXBuilder;
 import org.jdom.xpath.XPath;

 public class Configuration implements Serializable, ConfigConstant {

     private static final long serialVersionUID = -8572272649468107517L;

     private static Configuration config = null;
     private HashMap<String, ActionConfig> actionMappings = new HashMap<String, ActionConfig>();
     private HashMap<String, FormConfig> formMappings = new HashMap<String, FormConfig>();
     private JDBCConfig jdbcConfig = null;

     public HashMap<String, FormConfig> getFormMappings() {
         return formMappings;
     }

     private Configuration() {

     }

     public static Configuration newInstance() {
         if (null == config) {
             config = new Configuration();
         }
         return config;
     }

     public Configuration configure(final ServletContext context) {
         return configure(DEFAULT_CONFIG_FILE, context);
     }

     @SuppressWarnings("unchecked")
     public Configuration configure(final String cfg , final ServletContext context)
             throws ConfigurationException {
         if (null == cfg | "".equals(cfg.trim()))
             throw new ConfigurationException("Configuration file is required.");
         /** 使用JDOM的SAX解析配置文件 **/
         SAXBuilder saxBuilder = new SAXBuilder();
         try {
             Document document = saxBuilder.build(Thread.currentThread()
                     .getContextClassLoader().getResourceAsStream(cfg));
             Element root = document.getRootElement();
             List<Element> actionElmts = (List<Element>)XPath.selectNodes(root, VIEW_ACTION);
             for(Element actionElmt : actionElmts) {
                 ActionConfig actionConfig = new ActionConfig();
                 /** 将配置文件的Action属性装配到ActionConfig **/
                 actionConfig.setPath(context.getContextPath() + actionElmt.getAttributeValue(ACTION_ATTRIB_PATH));
                 actionConfig.setClassName(actionElmt.getAttributeValue(ACTION_ATTRIB_CLASS));
                 actionConfig.setName(actionElmt.getAttributeValue(ACTION_ATTRIB_NAME));

                 /** 将配置文件的Action的result子节点装配到ActionConfig **/
                 List<Element> resultElmts = actionElmt.getChildren(ACTION_CHILDREN_RESULT);
                 for(Element resultElmt : resultElmts) {
                     ResultConfig resultConfig = new ResultConfig();
                     Attribute nameAttrib = resultElmt.getAttribute(ACTION_CHILDREN_RESULT_NAME);
                     Attribute pathAttrib = resultElmt.getAttribute(ACTION_CHILDREN_RESULT_PATH);
                     Attribute typeAttrib = resultElmt.getAttribute(ACTION_CHILDREN_RESULT_TYPE);
                     resultConfig.setName(nameAttrib.getValue());
                     resultConfig.setForward(typeAttrib.getBooleanValue());
                     resultConfig.setPath(pathAttrib.getValue());
                     actionConfig.getResults().put(resultConfig.getName(), resultConfig);
                 }
                 /** 将ActionConfig装配到Configuration **/
                 actionMappings.put(actionConfig.getPath(), actionConfig);
             }

             /** 将配置文件的form属性装配到FormConfig **/
             List<Element> formElmts = (List<Element>)XPath.selectNodes(root, VIEW_FORMS_FORM);
             for(Element formElmt : formElmts) {
                 FormConfig formConfig = new FormConfig();
                 formConfig.setName(formElmt.getAttributeValue(FORM_ATTRIB_NAME));
                 formConfig.setClassName(formElmt.getAttributeValue(FORM_ATTRIB_CLASS));

                 List<Element> propertyElmts = formElmt.getChildren(FORM_CHILDREN_PROP);
                 for(Element propertyElmt : propertyElmts) {
                     PropertyConfig propertyConfig = new PropertyConfig();
                     propertyConfig.setName(propertyElmt.getAttributeValue(FORM_CHILDREN_PROP_NAME));
                     propertyConfig.setType(propertyElmt.getAttributeValue(FORM_CHILDREN_PROP_TYPE));
                     propertyConfig.setValue(propertyElmt.getAttributeValue(FORM_CHILDREN_PROP_VALUE));
                     formConfig.getProperties().add(propertyConfig);
                 }
                 formMappings.put(formConfig.getName(), formConfig);
             }

             /** 配置JDBC **/
             Element driverClassNameElmt =  (Element)XPath.selectSingleNode(root, JDBC_DRIVER_CLASS_NAME);
             Element urlElmt =  (Element)XPath.selectSingleNode(root, JDBC_URL);
             Element userElmt =  (Element)XPath.selectSingleNode(root, JDBC_USER);
             Element passwordElmt =  (Element)XPath.selectSingleNode(root, JDBC_PASSWORD);
             Element maxActiveElmt =  (Element)XPath.selectSingleNode(root, JDBC_MAX_ACTIVE);
             Element maxWaitElmt =  (Element)XPath.selectSingleNode(root, JDBC_MAX_WAIT);
             jdbcConfig = new JDBCConfig();
             jdbcConfig.setDriverClassName(driverClassNameElmt.getText());
             jdbcConfig.setUrl(urlElmt.getText());
             jdbcConfig.setUser(userElmt.getText());
             jdbcConfig.setPassword(passwordElmt.getText());
             jdbcConfig.setMaxActive(Integer.valueOf(maxActiveElmt.getText()));
             jdbcConfig.setMaxWait(Integer.valueOf(maxWaitElmt.getText()));

         } catch (JDOMException e) {
             e.printStackTrace();
         } catch (IOException e) {
             e.printStackTrace();
         }
         return config;
     }

     public HashMap<String, ActionConfig> getActionMappings() {
         return actionMappings;
     }

     public JDBCConfig getJdbcConfig() {
         return jdbcConfig;
     }
 }

 

Action.java文件：

Action为抽象类，所有的Action都必须继承该Action基类。

 package com.westdream.action;

 import java.io.IOException;

 import javax.servlet.ServletException;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 public abstract class Action {

     public Action() {

     }

     public String execute(HttpServletRequest request,
             HttpServletResponse response, Object data) throws ServletException, IOException {
         return null;
     }
 }

 

CharsetFilter.java文件：

处理中文乱码，默认为uft8

 package com.westdream.filter.charset;

 import java.io.IOException;

 import javax.servlet.Filter;
 import javax.servlet.FilterChain;
 import javax.servlet.FilterConfig;
 import javax.servlet.ServletException;
 import javax.servlet.ServletRequest;
 import javax.servlet.ServletResponse;

 public class CharsetFilter implements Filter {

     private static final long serialVersionUID = -3476217771259063866L;

     private String charset = "utf-8";

     public void doFilter(ServletRequest request, ServletResponse response,
             FilterChain chain) throws IOException, ServletException {
         request.setCharacterEncoding(charset);
         request.setCharacterEncoding(charset);
         chain.doFilter(request, response);
     }

     public void init(FilterConfig config) throws ServletException {
         if(config.getInitParameter("charset") != null) {
             charset = config.getInitParameter("charset");
         }
     }

     public void destroy() {

     }

 }

 

web.xml文件:

注意这里我使用的是.go不是.do，呵呵

 <?xml version="1.0" encoding="UTF-8"?>
 <web-app version="2.5" 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-app_2_5.xsd">
     <welcome-file-list>
         <welcome-file>index.jsp</welcome-file>
     </welcome-file-list>
     <servlet>
         <servlet-name>action</servlet-name>
         <servlet-class>com.westdream.ActionServlet</servlet-class>
     </servlet>
     <servlet-mapping>
         <servlet-name>action</servlet-name>
         <url-pattern>*.go</url-pattern>
     </servlet-mapping>

     <filter>
         <filter-name>CharsetFilter</filter-name>
         <filter-class>com.westdream.filter.charset.CharsetFilter</filter-class>
         <init-param>
             <param-name>charset</param-name>
             <param-value>utf-8</param-value>
         </init-param>
     </filter>
     <filter-mapping>
         <filter-name>CharsetFilter</filter-name>
         <url-pattern>/*</url-pattern>
     </filter-mapping>
     <login-config>
         <auth-method>BASIC</auth-method>
     </login-config>
 </web-app>