有了Struts資源的調(diào)用，我們繼續(xù)來完成JAVABEAN部分的編寫！
首先，我們編寫PAction.java文件來完成連接等初始化工作，源代碼如下：
PAcation.java的源代碼
package guestbook.maxuan.action;
import javax.naming.*;
import java.util.Properties;
import java.util.*;
import javax.rmi.PortableRemoteObject;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Locale;
import java.util.Vector;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionServlet;
import org.apache.struts.util.MessageResources;
import guestbook.maxuan.ejb.control.*;
public class PAction extends Action{
//public ActionErrors errors = new ActionErrors();
public BookControl control = null;
public Context getInitialContext() {
String url = "t3://127.0.0.1:";
String user = null;
String password = null;
Properties properties = null;
ActionServlet actionServlet = this.getServlet();
String port = actionServlet.getServletConfig(). getInitParameter("port");
url = url + port;
try {
properties = new Properties();
properties.put(Context.INITIAL_CONTEXT_FACTORY,
"weblogic.jndi.WLInitialContextFactory");
properties.put(Context.PROVIDER_URL, url);
if (user != null) {
properties.put(Context.SECURITY_PRINCIPAL, user);
properties.put(Context.SECURITY_CREDENTIALS, password == null ? "" : password);
}
return new InitialContext(properties);
}
catch(Exception e) {
e.printStackTrace();
}
return null;
}
public BookControl getInitControl( ){
BookControl control = null;
Context ctx = getInitialContext();
try{
Object object = ctx.lookup("BookControl");
BookControlHome bookcHome = (BookControlHome) PortableRemoteObject.narrow(object,
BookControlHome.class);
control = bookcHome.create();
}catch(Exception e){
e.printStackTrace();
}
return control;
}
}
接著我們編寫LyListAction.java文件，得到所有的留言信息LIST。
LyListAction.java的源代碼
package guestbook.maxuan.action;
import javax.naming.*;
import java.util.Properties;
import javax.rmi.PortableRemoteObject;
import java.util.*;
import java.util.Locale;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.ServletConfig;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ForwardingActionForward;
import org.apache.struts.action.ActionServlet;
import org.apache.struts.util.MessageResources;
import guestbook.maxuan.ejb.control.*;
public class LyListAction extends PAction{
public ActionForward perform(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) {
Locale locale = getLocale(request);
HttpSession session = request.getSession();
Context ctx = (Context)session.getAttribute("ctx");
if(ctx==null){
ctx = getInitialContext();
session.setAttribute("ctx",ctx);
}
try{
Object object = ctx.lookup("BookControl");
BookControlHome bookHome = (BookControlHome) PortableRemoteObject.narrow(object,
BookControlHome.class);
BookControl bookControl = bookHome.create();
ArrayList lyList = bookControl.getLyList();
session.setAttribute("lyList",lyList);
}catch(Exception e){
e.printStackTrace();
}
return (mapping.findForward("success"));
}
}
由于我們需要新加留言，所以這次比上次的EJB教程多出了存儲部份，留言需要一個FORM來提交，最后進行
存儲，所以我們需要新加入LyForm.java、LyEditAction.java、LySaveAction.java三個文件的編寫，源代
碼如下：
LyForm.java的源代碼
package guestbook.maxuan.action;
import javax.servlet.http.HttpServletRequest;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
import guestbook.maxuan.ejb.entity.value.*;
public final class LyForm extends ActionForm{
public String action="add";
public String name;
public String email;
public String qq;
public String comment;
private BookValue value = new BookValue();
public String getAction() {
return action;
}
public void setAction(String action) {
this.action = action;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getQq() {
return qq;
}
public void setQq(String qq) {
this.qq = qq;
}
public String getComment() {
return comment;
}
public void setComment(String comment) {
this.comment = comment;
}
public BookValue getValue(){
value.setName(name);
value.setEmail(email);
value.setQq(qq);
value.setComment(comment);
value.setAction(action);
return value;
}
public void setValue(BookValue value){
name = value.getName();
email = value.getEmail();
qq = value.getQq();
comment = value.getComment();
action = value.getAction();
}
}
LyEditAction.java的源代碼
package guestbook.maxuan.action;
import javax.naming.*;
import java.util.Properties;
import java.util.*;
import javax.rmi.PortableRemoteObject;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Locale;
import java.util.Vector;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionServlet;
import org.apache.struts.util.MessageResources;
import guestbook.maxuan.action.PAction;
import guestbook.maxuan.ejb.entity.value.*;
import guestbook.maxuan.ejb.entity.*;
import guestbook.maxuan.ejb.control.*;
import java.util.Collection;
public class LyEditAction extends PAction{
public ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
Locale locale = getLocale(request);
MessageResources messages = getResources(request);
HttpSession session = request.getSession();
String action = request.getParameter("action");
Context ctx = (Context)session.getAttribute("ctx");
BookValue value =(BookValue) request.getAttribute("value");
//errors.clear();
if (form == null) {
form = new LyForm();
if ("request".equals(mapping.getScope())) {
request.setAttribute(mapping.getAttribute(), form);
} else {
session.setAttribute(mapping.getAttribute(), form);
}
}
if(ctx==null){
ctx = getInitialContext();
session.setAttribute("ctx",ctx);
}
LyForm lyForm = (LyForm) form;
if(action!=null){
lyForm.setAction(action);
}
if (value!=null){
try {
PropertyUtils.copyProperties(lyForm, value);
} catch (Exception e) {
}
}
return (mapping.findForward("success"));
}
}
LySaveAction.java的源代碼
package guestbook.maxuan.action;
import javax.naming.*;
import java.util.Properties;
import java.util.*;
import java.text.*;
import javax.rmi.PortableRemoteObject;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.util.Locale;
import java.util.Vector;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionServlet;
import org.apache.struts.util.MessageResources;
import guestbook.maxuan.action.PAction;
import guestbook.maxuan.ejb.entity.value.*;
import guestbook.maxuan.ejb.entity.*;
import guestbook.maxuan.ejb.control.*;
import java.sql.*;
public final class LySaveAction extends PAction{
public ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
Locale locale = getLocale(request);
MessageResources messages = getResources(request);
HttpSession session = request.getSession();
BookValue value=null;
LyForm lyForm = (LyForm) form;
Context ctx = (Context)session.getAttribute("ctx");
//errors.clear();
if(control==null){
control=getInitControl();
session.setAttribute("control",control);
}
//errors = lyForm.check();
try {
Calendar cal = Calendar.getInstance();
SimpleDateFormat formatter= new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//設(shè)置留言時間格式
String datestr = formatter.format(new Timestamp(cal.getTime().getTime()));
value = lyForm.getValue();
value.setIp(request.getRemoteAddr());//寫入訪問者IP
value.setPosttime(datestr);
control.savely(value);
}catch(Exception e){
e.printStackTrace();
}
return (mapping.findForward("success"));
}
}
在上面，我將原本寫在里面的檢查語句都注釋掉了，大家可以自己寫進去，也就是對郵件，留言不能為空等檢查，當(dāng)然也可以在頁面中寫javascript小腳本，不過這對有心惡意搗亂的人沒什么用！
PAction.java完成一些連接等初始動作，其它的分別為顯示留言，提交留言等動作，也可以自行定義添加其它動作在里面！例如刪除！
出處：藍色理想
責(zé)任編輯：藍色
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