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java web: eclipse & maven & jetty & struts2 & mysql = 简单登录页面

2024-07-22 06:39:11   217人阅读

第一次接触java web开发，花费了一天半的时间，写了个简单的登录页面，以此文为记。

开发工具

Eclipse Luna Release (4.4.0) 已集成maven，maven目前的体会就是管理各种依赖

jetty为maven提供的一个插件，类似tomcat

struts2框架，MVC，action，jsp

mysql server 5.6

开发过程

1. 新建Maven web工程

Group Id: org.apache.maven.archetypes

Artifact Id: maven-archetype-webapp

2. 使用maven添加依赖及插件

在pom.xml的<dependencies></dependencies>间添加，或者是右键工程选择Maven->Add Dependency

jsp页面支持

<dependency>    <groupId>javax.servlet</groupId>    <artifactId>servlet-api</artifactId>    <version>2.5</version>    <scope>provided</scope></dependency>

struts2

<dependency>    <groupId>org.apache.struts</groupId>    <artifactId>struts2-core</artifactId>    <version>2.3.16</version></dependency>

mysql connector

<dependency>    <groupId>mysql</groupId>    <artifactId>mysql-connector-java</artifactId>    <version>5.1.31</version></dependency>

jetty

为插件，在<plugins></plugins>间添加，或者是右键工程选择Maven->Add Plugin，接着在pom.xml中写配置

<plugin>    <groupId>org.mortbay.jetty</groupId>    <artifactId>maven-jetty-plugin</artifactId>    <version>6.1.10</version>        <configuration>        <scanIntervalSeconds>10</scanIntervalSeconds>        <stopKey>foo</stopKey>        <stopPort>9999</stopPort>    </configuration>                    <executions>        <execution>            <id>start-jetty</id>            <phase>pre-integration-test</phase>            <goals>                <goal>run</goal>            </goals>                        <configuration>                <scanIntervalSeconds>0</scanIntervalSeconds>                <daemon>true</daemon>            </configuration>        </execution>                <execution>            <id>stop-jetty</id>            <phase>post-integration-test</phase>            <goals>                <goal>stop</goal>            </goals>        </execution>    </executions></plugin>

编译源码的插件

<plugin>    <artifactId>maven-compiler-plugin</artifactId>    <version>2.3.2</version>        <configuration>        <source>1.6</source>        <target>1.6</target>    </configuration></plugin>

注意plugin的层次

<build>    <plugins>    <plugin>...</plugin>    </plugins></build>

3. maven命令行

网上搜索资料，得知命令mvn jetty:run，可以启动jetty。

请教杨学长后，知道在Eclipse中，右键工程，选择run as中的run configurations，打开界面如下

红框部分，即是maven命令输入的地方，如jetty:run

4. struts2框架开发登录页面

4.1 web.xml中添加struts2过滤器

<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>

4.2 struts.xml中添加action

<package name="struts2demo" namespace="/" extends="struts-default">    <action name="Login">        <result>login.jsp</result>     </action>        <action name="Welcome" class="struts2demo.WelcomeUserAction">        <result name="SUCCESS">welcome_user.jsp</result>        <result name="ERROR">error.jsp</result>    </action></package>

4.3 MVC

V->login.jsp

<%@ page contentType="text/html; charset=UTF-8"%><%@ taglib prefix="s" uri="/struts-tags"%><html><head></head><body>    <s:form action="Welcome">    <s:textfield name="username" label="Username"/>    <s:password name="password" label="Password"/>    <s:submit/>  </s:form>    </body></html>

M->WelcomeUserAction.java

package struts2demo;import java.sql.*;public class WelcomeUserAction {    //<s:textfield name="username"> you can get it from <s:property value="http://www.mamicode.com/username">    private String username;    private String password;        //get and set method for struts2 fill in    //Username is the label name    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;    }        //"all struts logic here"    public String execute() {                //        try {            Class.forName("com.mysql.jdbc.Driver");            //System.out.println("Success loading Mysql Driver!");        }        catch (Exception e) {            //System.out.println("Error loading Mysql Driver!");            e.printStackTrace();        }                //        try {            Connection connect = DriverManager.getConnection("jdbc:mysql://localhost:3306/zrss", "root", "1234");                        String sql = "select * from user where name = ?";            PreparedStatement ps = connect.prepareStatement(sql);            ps.setString(1, username);            ResultSet rs = ps.executeQuery();                        while (rs.next()) {                if (rs.getString("password").equals(password)) {                    return "SUCCESS";                }            }        }        catch (Exception e) {            e.printStackTrace();        }                return "ERROR";    }}

C->forward to SUCCESS(welcome_user.jsp) or ERROR(error.jsp)

5. 参考资料

http://www.cnblogs.com/fnng/archive/2011/12/16/2290587.html maven的命令行使用

http://www.mkyong.com/struts2/struts-2-hello-world-example/ struts2的一个简单例子

http://freeshare.free4lab.com/resource?id=971 项目组开发环境

 

java web: eclipse & maven & jetty & struts2 & mysql = 简单登录页面


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