Maven构建并热部署一个简单的Web Project

第一步：构建Maven环境和安装m2e插件

这一步就不啰嗦了，很简单。照着做就行了

怎么构建Maven环境网上有很多教程，下面我随便找了一个
http://blog.csdn.net/chenxuejiakaren/article/details/7938524

eclipse安装m2e插件
Help -> Install New Software
http://download.eclipse.org/technology/m2e/releases/

第二步：创建Maven工程
File -> New -> Other -> Maven -> Maven Project

在src/main/java下创建包路径,存在就不用创建了
com/msh/produce/crs

为让源文件目录下面的包看上去是包的图标而不是文件夹，可以通过下面步骤修改
邮件工程 -> Build Path -> Link Source 选择 src/main/java 作为源文件目录即可

第三步：给工程添加Spring和Struts2对应jar包依赖

编辑pom.xml文件,添加以下内容

<!-- spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring</artifactId>
<version>2.5.6.SEC03</version>
</dependency>
<!-- struts2 -->
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-core</artifactId>
<version>2.3.15.3</version>
</dependency>
<!-- struts2-spring-plugin -->
<dependency>
<groupId>org.apache.struts</groupId>
<artifactId>struts2-spring-plugin</artifactId>
<version>2.3.15.3</version>
</dependency>

为了方面记录日志，在添加log4j依赖

<!-- log4j -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>

如果你需要添加某个依赖，不知道它的groupId,artifactid,version，推荐大家一个搜索jar的站点，类似的站点很多，我就不一一列举了，下面看下例子就行了

好了，spring、struts、log4j的依赖配置都配置好了之后，我们就需要让maven来帮我们来下载这些依赖的jar包了
右键工程 -> Maven -> Update Project

OK,查看下依赖的jar都加进来了没？

是不是 so easy,so simple，比你去网上搜罗这些jar要方便的多了

因为下面我们还要用到MySQL和JSP所以还需要添加一下几个依赖

<!-- dbcp 配置数据源用的-->
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>1.4</version>
</dependency>
<!-- MySQL -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.27</version>
</dependency>
<!-- Servlet -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.4</version>
<scope>provided</scope>
</dependency>

OK,再重复下上面的步骤，再看看jar包是不是都有了

好了准备工作做的差不多了，可以开始写代码了

上面第三步还漏了一步，需要将Maven工程设置为Dynamic Web Project

工程右键 -> Project Facets -> 勾选上 Dynamic Web Module 2.5

注意：
如果出现更改不了，可以直接修改SimpleWebProject/.setting/org.eclipse.wst.common.project.facet.core.xml

修改后，重启下eclipse

第四步：编写一个最简单的注册功能
创建如下包路径

=====applicationContext.xml======

<!-- log4j -->
<bean id="log4jConfigurer" class="org.springframework.util.Log4jConfigurer"
abstract="true" factory-method="initLogging">
<constructor-arg index="0" value="classpath*:log4j.properties"></constructor-arg>
<constructor-arg index="1" value="30000"></constructor-arg>
</bean>
<bean id="propertyPlaceholderConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="locations">
<list>
<value>classpath:jdbc.properties</value>
</list>
</property>
</bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${jdbc0.driverClassName}"></property>
<property name="url" value="${jdbc0.url}"></property>
<property name="username" value="${jdbc0.username}"></property>
<property name="password" value="${jdbc0.password}"></property>
<property name="maxActive" value="${jdbc0.maxActive}"></property>
</bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<constructor-arg ref="dataSource"></constructor-arg>
</bean>
<!-- regiser module -->
<import
resource="classpath:com/msh/produce/crs/register/applicationContext_crs_register.xml" />

=====jdbc.properties=====

jdbc0.driverClassName=com.mysql.jdbc.Driver
jdbc0.url=jdbc:mysql://localhost:3306/MySQL
jdbc0.username=root
jdbc0.password=root
jdbc0.maxActive=5

=====log4j.properties=====

log4j.rootLogger=info,console
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss:SSS} [%p]-[%C.%M:%L] %m%n

=====struts.xml=====

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<!-- regiser module -->
<include file="com/msh/produce/crs/register/struts_crs_register.xml"></include>
</struts>

=====RegisterManagerDAO=====

package com.msh.produce.crs.register.dao;


public interface RegisterManagerDAO
{


String SUCCESS = "注册成功";
String FAILURE = "注册失败";


/**
* 保存注册信息
* 
* @param name
* @param passwd
* @return
*/
String saveRegisterInfo(String name, String passwd);
}


=====RegisterManagerDAOImp=====


package com.msh.produce.crs.register.dao;


import java.sql.PreparedStatement;
import java.sql.SQLException;


import org.apache.log4j.Logger;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.PreparedStatementSetter;


public class RegisterManagerDAOImp implements RegisterManagerDAO
{


@Override
public String saveRegisterInfo(final String name, final String passwd)
{
try
{
jt.update("insert into tab_person(name,passwd) values(?,?)",
new PreparedStatementSetter()
{


@Override
public void setValues(PreparedStatement ps) throws SQLException
{
ps.setString(1, name);
ps.setString(2, passwd);
}
});
return SUCCESS;
}
catch (Exception e)
{
log.error("", e);
return FAILURE;
}
}


public void setJt(JdbcTemplate jt)
{
this.jt = jt;
}


private static final Logger log = Logger.getLogger(RegisterManagerDAOImp.class);
private JdbcTemplate jt;
}

======RegisterManagerAction======

package com.msh.produce.crs.register.action;


import java.io.IOException;


import javax.servlet.http.HttpServletResponse;


import org.apache.log4j.Logger;
import org.apache.struts2.ServletActionContext;


import com.msh.produce.crs.register.dao.RegisterManagerDAO;
import com.opensymphony.xwork2.ActionSupport;


public class RegisterManagerAction extends ActionSupport
{


/**
* 账号注册页面
* 
* @return
*/
public String register()
{
if (log.isInfoEnabled())
{
log.info("Forward to register page!");
}
return "register";
}


/**
* 账号注册
* 
* @return
*/
public void doRegister()
{
if (log.isInfoEnabled())
{
log.info("Do register {name=" + name + ", passwd=" + passwd + "}");
}
String ajax = registerManagerDao.saveRegisterInfo(name, passwd);
writeAjax(ajax);
}


private void writeAjax(String ajax)
{
HttpServletResponse hsr = ServletActionContext.getResponse();
try
{
hsr.reset();
hsr.setContentType("text/html;charset=utf-8");
hsr.getWriter().write(ajax);
hsr.getWriter().flush();
hsr.getWriter().close();
}
catch (IOException e)
{
log.error("", e);
}
}


public void setRegisterManagerDao(RegisterManagerDAO registerManagerDao)
{
this.registerManagerDao = registerManagerDao;
}


public void setName(String name)
{
this.name = name;
}


public void setPasswd(String passwd)
{
this.passwd = passwd;
}


private static final long serialVersionUID = -6370332854095254121L;
private static final Logger log = Logger.getLogger(RegisterManagerAction.class);
private RegisterManagerDAO registerManagerDao;
private String name;
private String passwd;
}

=====applicationContext_crs_register.xml======

<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN"
"http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>
<bean id="crs_register_RegisterManagerDAOImp" class="com.msh.produce.crs.register.dao.RegisterManagerDAOImp">
<property name="jt">
<ref bean="jdbcTemplate"/>
</property>
</bean>
<bean id="crs_register_RegisterManagerAction"
class="com.msh.produce.crs.register.action.RegisterManagerAction"
scope="prototype">
<property name="registerManagerDao" ref="crs_register_RegisterManagerDAOImp"></property>
</bean>
</beans>

======struts_crs_register.xml======

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
<package name="crs_register" extends="struts-default"
namespace="/register">
<action name="registerManagerAction" class="crs_register_RegisterManagerAction">
<result name="register">/crs/register/register.jsp</result>
</action>
</package>
</struts>

编写jsp页面

=====register.jsp======

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@taglib prefix="s" uri="/struts-tags"%>
<!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>注册页面</title>
<link rel="stylesheet" type="text/css" href="<s:url value="/ui/css/normal/ui.css"/>" />
<style type="text/css">
</style>
<script type="text/javascript" src="<s:url value="/ui/js/jquery-1.4.4.js"/>"></script>
<script type="text/javascript">
$(function()
{
$("#registerBtn").click(
function()
{
$.ajax
({
url:"<s:url value="/register/registerManagerAction!doRegister.action"/>",
type:"POST",
data:
{
name:$.trim($("input[name=name]").val()),
passwd:$.trim($("input[name=passwd]").val())
},
success:function(data)
{
$("#registerResult").html(data);
},
error:function(err){}
});
}
);
});
</script>
</head>
<body>
<table class="propertygrid" style="width:30%">
<tr>
<th width="40%">账号：</th>
<td>
<input type="text" name="name" />
</td>
</tr>
<tr>
<th width="40%">密码：</th>
<td>
<input type="password" name="passwd" />
</td>
</tr>
<tr>
<th colspan="2" style="text-align:center;">
<input id="registerBtn" type="button" value="注册" />
</th>
</tr>
</table>
<div id="registerResult" style="width:30%;"></div>
</body>
</html>

代码都写好了，下面需要部署测试功能了