Topquan's Blog

eclipse下struts+spring+hibernate快速入門（二）

Web層．
創建Struts Action，為了在一個action中實現CRUD操作，Action繼承了DispatchAction根據參數決定調用方法。在src/com.jandar.web.struts.action下創建UserAction.java
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
import org.apache.struts.action.DynaActionForm;
import org.apache.struts.actions.DispatchAction;
import com.jandar.model.User;
import com.jandar.service.spring.UserManager;
public class UserAction extends DispatchAction {
private static Log log = LogFactory.getLog(UserAction.class);
private UserManager mgr = null;
public void setUserManager(UserManager userManager) {
this.mgr = userManager;
}
public ActionForward delete(ActionMapping mapping, ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
if (log.isDebugEnabled()) {
log.debug("entering ''delete'' method...");
}
mgr.removeUser(request.getParameter("user.id"));
ActionMessages messages = new ActionMessages();
messages.add(ActionMessages.GLOBAL_MESSAGE,
new ActionMessage("user.deleted"));
saveMessages(request, messages);
return list(mapping, form, request, response);
}
public ActionForward edit(ActionMapping mapping, ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
if (log.isDebugEnabled()) {
log.debug("entering ''edit'' method...");
}
DynaActionForm userForm = (DynaActionForm) form;
String userId = request.getParameter("id");
// null userId indicates an add
if (userId != null) {
User user = mgr.getUser(userId);
if (user == null) {
ActionErrors errors = new ActionMessages();
errors.add(ActionMessages.GLOBAL_MESSAGE,
new ActionMessage("user.missing"));
saveErrors(request, errors);
return mapping.findForward("list");
}
userForm.set("user", user);
}
return mapping.findForward("edit");
}
public ActionForward list(ActionMapping mapping, ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
if (log.isDebugEnabled()) {
log.debug("entering ''list'' method...");
}
request.setAttribute("users", mgr.getUsers());
return mapping.findForward("list");
}
public ActionForward save(ActionMapping mapping, ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
if (log.isDebugEnabled()) {
log.debug("entering ''save'' method...");
}
// run validation rules on this form
ActionErrors errors = form.validate(mapping, request);
if (!errors.isEmpty()) {
saveErrors(request, errors);
return mapping.findForward("edit");
}
DynaActionForm userForm = (DynaActionForm) form;
mgr.saveUser((User)userForm.get("user"));
ActionMessages messages = new ActionMessages();
messages.add(ActionMessages.GLOBAL_MESSAGE,
new ActionMessage("user.saved"));
saveMessages(request, messages);
return list(mapping, form, request, response);
}
public ActionForward unspecified(ActionMapping mapping, ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws Exception {
return list(mapping, form, request, response);
}
}
UserAction.java通過UserManger訪問業務層，UserManager通過依賴注入
2． 創建struts ActionFrom
可以在src/com.jandar.web.struts.form下創建一個UserForm.java的struts ActionForm，我們也可以采用已建好的模型來配置form bean即采用動態form
org.apache.struts.validator.DynaValidatorForm 同時指定property 為
com.jandar.model.User詳見struts-config.xml配置文件.

配置struts-config.xml
1． 配置struts-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
"<struts-config>
<!-- ======================================== Form Bean Definitions -->
<form-beans>
<form-bean
name="userForm" type="org.apache.struts.validator.DynaValidatorForm">
<form-property name="user" type="com.jandar.model.User"/>
</form-bean>
</form-beans>
<!-- =================================== Global Forward Definitions -->
<global-forwards>
</global-forwards>
<!-- =================================== Action Mapping Definitions -->
<action-mappings>
<action path="/user" type="com.jandar.web.struts.action.UserAction "
name="userForm" scope="request" parameter="method" validate="false">
<forward name="list" path="/userList.jsp"/>
<forward name="edit" path="/userForm.jsp"/>
</action>
</action-mappings>
<!-- ================================ Message Resources Definitions -->
<message-resources parameter="messages"/>
</struts-config>
2． 通過struts-config.xml把struts和spring結合起來
UserAction.java中的UserManager需要通過依賴注入，通過plug-in技術將spring加到struts中，在struts-config.xml中增加一下代碼
<plug-in className="org.springframework.web.struts.ContextLoaderPlugIn">
<set-property property="contextConfigLocation"
value="/WEB-INF/applicationContext.xml,
/WEB-INF/action-servlet.xml"/>
</plug-in>
讓struts啟動同時初始化spring，讀取spring的配置文件applicationContext.xml,并且把struts的action也交給spring管理，把action配置到action-servlet.xml中
新建action-servlet.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
"<beans>
<bean name="/user" class="com.jandar.web.struts.action.UserAction" singleton="false">
<property name="userManager"><ref bean="userManager"/></property>
</bean>
</beans>
同時將action映射到org.springframework.web.struts.DelegatingActionProxy即修改
<action path="/user" type="org.springframework.web.struts.DelegatingActionProxy"
name="userForm" scope="request" parameter="method" validate="false">
<forward name="list" path="/userList.jsp"/>
<forward name="edit" path="/userForm.jsp"/>
</action>
3． 新建web.xml配置文件
<?xml version="1.0" encoding="UTF-8"?>

<web-app xmlns="

xmlns:xsi="

xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee

<servlet>

<%@ taglib uri="

<%@ taglib uri="

<%@ taglib uri="

<%@ taglib uri="

<%@ taglib uri="

<%@ taglib uri="<html:html locale="true">

userForm.jsp
<%@ page language="java"%>
<%@ taglib uri="<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html:html locale="true">
<head>
<html:base />
<title>userform.jsp</title>
</head>
<body>
<html:form action="user.do?method=save" method="post" focus="id">
<html:hidden property="user.id"/>
<table border="0">
<tr>
<td>id:</td>
<td><html:text property="user.firstname"/></td>
</tr>
<tr>
<td>lastname:</td>
<td><html:text property="user.lastname" /></td>
</tr>
<tr>
<td colspan="2" align="center"><html:submit property="tijiao"/></td>
</tr>
</table>
</html:form>
</body>
</html:html>
userList.jsp
<%@ page language="java"%>
<%@ taglib uri="<%@ taglib uri="<%@ taglib uri="<%@ taglib uri="<%@ taglib uri="<%@ taglib uri="<%@ taglib uri="<html:html locale="true">
<head>
<html:base />
<title>userList.jsp</title>
</head>
<body>
This a struts page. <br>
<table class="list">
<thead>
<tr>
<th>id</th>
<th>firstName</th>
<th>lastName</th>
</tr>
</thead>
<tbody>
<logic:iterate id="user" name="users">
<tr>
<td>
<a href="user.do?method=edit&amp;id=<bean:write name="user" property="id"/>"><bean:write name="user" property="id"/></a>
</td>
<td><bean:write name="user" property="firstName"/></td>

posted on 2006-08-09 23:15 topquan 閱讀(751) 評論(0)  編輯  收藏 所屬分類: Spring