Struts2注解学习1
这是开博的第一篇,我希望每天把我学到的东西记录下来,成为一个知识库,方便以后的学习和分享
在项目中看到用struts2注解来做,很方便,做了一个用户登录的例子
1、加载所需jar包
commons-fileupload-1.2.1 jar
commons-io-1.4.jar
freemarker-2.3.15.jar
ognl-2.7.3 jar
struts2-core-2.1.8 jar
xwork-core-2.1.6 jar
struts2-json-plugin-2.1.8.1 jar
struts2-convention-plugin-2.1.8.1 jar
2、
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | package com.action; import org.apache.struts2.convention.annotation.Namespace; import org.apache.struts2.convention.annotation.ParentPackage; import org.apache.struts2.convention.annotation.Result; import org.apache.struts2.convention.annotation.Results; @Namespace (value= "/checkUser" ) @ParentPackage (value= "struts-default" ) @Results ( { @Result (name= "yes" ,location= "/check/yes.jsp" ), @Result (name= "no" ,location= "/check/no.jsp" ) } ) public class UserAction{ private String userName; private String password; public String getUserName() { return userName; } public void setUserName(String userName) { this .userName = userName; } public String getPassword() { return password; } public void setPassword(String password) { this .password = password; } public String execute() { if ( "1" .equals(userName)&& "2" .equals(password)){ return "yes" ; } return "no" ; } } |
action类,
@Namespace(value="/checkUser") 定义该action类的命名空间为checkUser ,
@ParentPackage(value="struts-default") 默认继承
@Results(
{
@Result(name="yes",location="/check/yes.jsp"),
@Result(name="no",location="/check/no.jsp")
}
) 定义该action返回时,跳转的页面
其中action的名字则是 “user” ,默认去掉action,首字母小写
3、配置web.xml
<filter> <filter-name>struts2</filter-name> <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class> <!--
<init-param> <param-name>actionPackages</param-name> <param-value>com.action</param-value> </init-param>
--> </filter> <filter-mapping> <filter-name>struts2</filter-name> <url-pattern>/*</url-pattern> </filter-mapping>
4、登录验证的jsp页面,如何访问action
<form action="checkUser/user" method="post">
用户名:<input name="userName"/></br>
密码:<input name="password"/></br>
<input type="submit" value="登录"/>
</form>
初次接触struts2注解,还在学习中
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