Struts2支持使用注解配置Action,减少配置文件的配置
Struts2如果要支持注解配置Action,需要插件的支持,导入插件struts2-convention-plugin-2.1.8.1.jar
项目目录树:
1.导入struts2需要的基本包
2.修改web.xml,让struts2拦截Action
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
<display-name>s2_1</display-name>
<welcome-file-list>
<welcome-file>login.jsp</welcome-file>
</welcome-file-list>
<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>/*</url-pattern>
</filter-mapping>
</web-app>
3.提供实体类User.java
package com.orange.domain;
public class User {
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;
}
}
4.提供Action类LoginAction.java
package com.orange.action; import org.apache.struts2.convention.annotation.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; import com.opensymphony.xwork2.ActionSupport;
import com.orange.domain.User; //默认可以不写
@ParentPackage("struts-default")
//根命名空间,可以不写
@Namespace("/")
//全局配置,如果方法上不指定result,则使用该Result
//@Results({@Result(name="success",location="/success.jsp"),
// @Result(name="error",location="/error.jsp")})
public class LoginAction extends ActionSupport{ private static final long serialVersionUID = 1L;
private User user; public User getUser() {
return user;
} public void setUser(User user) {
this.user = user;
} //@Action(value="login2")
@Action(value="login2" ,results={@Result(name="success",location="/success.jsp"),
@Result(name="error",location="/error.jsp")})
public String login() throws Exception{
if("admin".equals(this.user.getUserName()) && "admin".equals(this.user.getPassword())){
return SUCCESS;
} return ERROR;
}
}
5.配置struts.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.1.7//EN"
"http://struts.apache.org/dtds/struts-2.1.7.dtd"> <struts>
<constant name="struts.i18n.encoding" value="GBK"/>
<constant name="struts.devMode" value="true" />
<constant name="struts.configuration.xml.reload" value="true" /> </struts>
6.提供相关的jsp
login.jsp
<%@ page language="java" contentType="text/html; charset=GBK"
pageEncoding="GBK"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>Insert title here</title>
</head>
<body> <form action="login2" method="post">
User:<input type="text" name="user.userName"><br>
Password:<input type="text" name="user.password"><br>
<input type="submit" value="submit">
</form>
</body>
</html>
success.jsp
<%@ page language="java" contentType="text/html; charset=GBK"
pageEncoding="GBK"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>Insert title here</title>
</head>
<body>
Success!
</body>
</html>
error.jsp
<%@ page language="java" contentType="text/html; charset=GBK"
pageEncoding="GBK"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GBK">
<title>Insert title here</title>
</head>
<body>
Error!
</body>
</html>
7.开始测试
输入admin/admin
配置成功!!!