Java3讲义_day5 AM_Struts

SSH: Spring Struts2 Hibernate3
Struts2: 脚手架,Web/Java, 流程控制（Servlet->Action Bean）,自定义tag.
加入struts框架：.jar build path, web.xml中部署strutsFilter, struts.xml
http://clab-581:8080/strutsweb/hi.action
Web.xml
<filter>
<filter-name>struts2</filter-name>
<filter-class>
org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter </filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>*.action</url-pattern>
</filter-mapping>
struts.xml
<package name="default"namespace="/"extends="struts-default">
<action name="hi"class="action.Hello">
<result name="success">/index.jsp</result></action> </package>
public class Hello extends ActionSupport {
public String execute() {
return"success";
}
}
动态方法、访问：
public class EmpAction {
public String execute(){
return"list";
}
public String save(){
System.out.println("save()");
return"list";
}
http://clab-581:8080/strutsweb/emp!save.action
参数获取-通过属性自动绑定：String ename=request.getParameter(“ename”);
在Action类中加参数的同名属性
http://clab-581:8080/strutsweb/emp.action?ename=ada
EmpAction.java
+ String ename; setter (getter)
public class EmpAction {
String ename;
public String getEname() {
return ename;
}
public void setEname(String ename) {
this.ename = ename;
}
public String execute(){
System.out.println(ename); //ada
绑定属性类型能自动转换
String ename;
Integer age;
Date birth;
Double height;
Setters & getters
//ename=ada&age=18&birth=1999-2-6&height=1.78
（集合类型获取）
Action属性在JSP中的获取（自动setAttribute到request中）
${ename}
${age} <br>
<%=request.getAttribute("birth") %><br>
<%@taglib uri="/struts-tags" prefix="s"%>
<s:property value="height"/>
获取request，response，session, application(ServletContext)
HttpServletRequest request=ServletActionContext.getRequest();
HttpSession session=request.getSession();
HttpServletResponse response=ServletActionContext.getResponse();
ServletContext application=ServletActionContext.getServletContext();
问题：NoSuchMethodError: antlr.collections.AST.getLine()
Hibernate antlr2.7.6.jar 有getLine()
Struts antlr2.7.2.jar 无getLine()
与加classpath(build build)顺序有管
解决：web-inf/lib/ 所有.jar移入（丢弃antlr2.7.2.jar，保留antlr2.7.6.jar）Lib_struts2_hibernate3集成包。