struts2下配置velocity-优快云博客

本文详细介绍如何在Struts框架中整合Velocity模板引擎，包括配置Maven依赖、编辑web.xml文件、设置Struts.xml中的Action，创建Velocity模板文件及编写对应的Action类。

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1.通过maven加载依赖

<dependency>

    <groupId>org.apache.velocity</groupId>

    <artifactId>velocity</artifactId>

    <version>1.7</version>

</dependency>

<dependency>

    <groupId>org.apache.velocity</groupId>

    <artifactId>velocity-tools</artifactId>

    <version>2.0</version>

</dependency>

2.编辑web.xml

<!-- 定义Velocity -->

<servlet>

    <servlet-name>velocitylayout</servlet-name>

    <servlet-class>org.apache.velocity.tools.view.servlet.VelocityViewServlet</servlet-class>

</servlet>

<servlet-mapping>

    <servlet-name>velocitylayout</servlet-name>

    <url-pattern>*.vm</url-pattern>

</servlet-mapping>

3.在struts.xml中添加测试使用的action

<package name="frame-default" extends="struts-default,json-default">

    <action name="example_*" method="{1}" class="exampleAction">

        <result>/WEB-INF/vm/example/{1}.vm</result>

    </action>
</package>

4.在/WEB_INF/vm下创建login.vm

<html>

    <head>

        <title>Velocity</title>

        <meta http-equiv="content-type" content="text/html; charset=UTF-8">

    </head>

    <body>

        <h2>你好: $username</h2>

    </body>

</html>

5.创建ExampleAction

@Service("exampleAction")

public class ExampleAction extends BaseAction {

    @Autowired

    private ExampleService exampleService;

    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 login() throws Exception {

        System.out.println("login");

        this.exampleService.save(this.getUsername());

        return Action.SUCCESS;

    }

    public String execute() throws Exception {

        System.out.println("execute");

        return Action.SUCCESS;

    }
}

6.最后在index.html中

<html>

    <head>

        <title>Example</title>

        <meta http-equiv="content-type" content="text/html; charset=UTF-8" />

    </head>

    <body>

        <h2>Hello World!</h2>

        <form method="post" action="example_login.action">

            <table align="center">

                <caption><h3>用户登录</h3></caption>

                <tr>

                    <td>用户名：<input type="text" name="username" /></td>

                </tr>

                <tr>

                    <td>密码：<input type="text" name="password" /></td>

                </tr>

                <tr align="center">

                    <td colspan="2">

                        <input type="submit" value="登录" />

                        <input type="reset" value="重填"/>

                    </td>

                </tr>

            </table>

        </form>

    </body>

</html>