Struts2學習四----------動態方法調用
阿新 • • 發佈:2017-05-10
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Struts2動態方法調用
- 默認:默認執行方法中的execute方法,若指定類中沒有該方法,默認返回success
<package name="default" extends="struts-default" namespace="/"> <action name="add" class="org.struts.dynamicmethod.action.DynamicMethod"> <result>/add.jsp</result> <!-- 若沒有execute方法,默認執行該result --> <result name="error">/error.jsp</result> </action> </package>
- 指定method屬性:執行method屬性中定義的方法,沒有該方法,頁面報錯
<package name="default" extends="struts-default" namespace="/"> <action name="add" method="add" class="org.struts.dynamicmethod.action.DynamicMethod"> <result>/add.jsp</result> <result name="error">/error.jsp</result> </action> </package>
- 通配符方式:使用*作用通配符,若沒有配置method,默認執行execute,沒有execute方法,默認返回success;
若配置method,執行method屬性中定義的方法,沒有該方法,則報錯
<package name="default" extends="struts-default" namespace="/"> <action name="add_*" method="{1}" class="org.struts.dynamicmethod.action.DynamicMethod"> <result>/{1}.jsp</result> <!-- 若未配置method屬性,並且沒有execute方法,默認執行該result --> <result name="error">/error.jsp</result> </action> </package>
- 感嘆號方法:在!(感嘆號)後面指定方法名,需在package中設置strict-method-invocation="false",並且開啟動態方法調用(老版本只需開啟動態方法調用即可)
<package name="default" extends="struts-default" namespace="/" strict-method-invocation="false"> <action name="add" class="org.struts.dynamicmethod.action.DynamicMethod"> <result>/add.jsp</result> <result name="error">/error.jsp</result> </action> </package> <constant name="struts.enable.DynamicMethodInvocation" value="true"/>
實例
1.項目結構
2.pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.struts</groupId> <artifactId>Struts2-DynamicMethod</artifactId> <packaging>war</packaging> <version>0.0.1-SNAPSHOT</version> <name>Struts2-DynamicMethod Maven Webapp</name> <url>http://maven.apache.org</url> <properties> <!-- 統一Struts2的版本 --> <struts.version>2.5.10</struts.version> <!-- 統一源代碼與編譯的編碼格式 --> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> </properties> <dependencies> <!-- junit --> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.12</version> <scope>test</scope> </dependency> <!-- Struts2 --> <dependency> <groupId>org.apache.struts</groupId> <artifactId>struts2-core</artifactId> <version>${struts.version}</version> </dependency> </dependencies> <build> <finalName>Struts2-DynamicMethod</finalName> </build> </project>
3.web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <filter> <filter-name>struts</filter-name> <filter-class>org.apache.struts2.dispatcher.filter.StrutsPrepareAndExecuteFilter</filter-class> </filter> <filter-mapping> <filter-name>struts</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> </web-app>
4.DynamicMethod.java
package org.struts.dynamicmethod.action; import com.opensymphony.xwork2.ActionSupport; public class DynamicMethod extends ActionSupport { private static final long serialVersionUID = 1L; public String add() { return "add"; } public String modify() { return "modify"; } public String delete() { return "delete"; } }
5.struts.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.5//EN" "http://struts.apache.org/dtds/struts-2.5.dtd"> <struts> <!-- 只有感嘆號動態調用方法時需設置strict-method-invocation="false" --> <package name="dynamic" extends="struts-default" namespace="/" strict-method-invocation="false"> <!-- 默認,無execute方法,執行name="success"的result --> <action name="search" class="org.struts.dynamicmethod.action.DynamicMethod"> <result>/search.jsp</result> <result name="error">/error.jsp</result> </action> <!-- 指定method屬性 --> <action name="add" method="add" class="org.struts.dynamicmethod.action.DynamicMethod"> <result name="add">/add.jsp</result> <result name="error">/error.jsp</result> </action> <!-- 感嘆號方式 --> <action name="modify" class="org.struts.dynamicmethod.action.DynamicMethod"> <result name="modify">/modify.jsp</result> <result name="error">/error.jsp</result> </action> <!-- 通配符方式 --> <action name="delete_*" method="{1}" class="org.struts.dynamicmethod.action.DynamicMethod"> <result name="delete">/{1}.jsp</result> <result name="error">/error.jsp</result> </action> </package> <!-- 開啟動態方法調用,只有使用感嘆號動態調用方法時需要開啟 --> <constant name="struts.enable.DynamicMethodInvocation" value="true"/> </struts>
6.index.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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=UTF-8"> <title>動態方法調用測試</title> </head> <body> <a href="search">查詢</a><br/> <a href="add">新增</a><br/> <a href="modify!modify">修改</a><br/> <a href="delete_delete">刪除</a> </body> </html>
7.delete.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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=UTF-8"> <title>Insert title here</title> </head> <body> This is delete.jsp </body> </html>
8.add.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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=UTF-8"> <title>Insert title here</title> </head> <body> This is add.jsp </body> </html>
9.modify.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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=UTF-8"> <title>Insert title here</title> </head> <body> This is modify.jsp </body> </html>
10.search.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <!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=UTF-8"> <title>Insert title here</title> </head> <body> This is search.jsp </body> </html>
11.效果預覽
11.1 主界面
11.2 查詢(默認方式,類中無execute方法,默認返回name="success"的result對應的界面)
11.3 新增(指定method屬性,執行add方法)
11.4 修改(感嘆號方式,執行modify方法)
11.5 刪除(通配符方式,執行delete方法)
參考:http://www.imooc.com/video/8999
Struts2學習四----------動態方法調用