一(what)什么是maven
maven:是项目管理的一个构建工具,通过一些【简单的描述信息】来管理项目的构建,报告,文档等的软件项目管理工具
二(why)为什么使用maven
按照传统的开发方式,在一开始,我们往往得找到一些jar包,难免不了jar包的冲突,而采用maven直不在考虑jar包的问题,只需要加入一些【简单的描述信息】即可
三(how)怎么使用用maven开发
1,File->New->Project…->Maven->(选择SDK)New->Next->填写GroupID(项目的包名),ArtifactId(模块名),版本默认即可->next->Project name(项目名字),路径->finish
结果如图所示:
,
2,view->Tool Windows->maven Project
3选中(如图所示,再运行,刷新)
maven就会到远程中心仓库下载所有依赖的jar包
这样就可以了,接着就是建包撸码了。。。
*采用Spring+springmvc框架,简单的验证用户登录问题
工程目录如下所示:
第一步建数据库
drop database springmvc;
create database springmvc;
use springmvc;
create table userTable(
id int primary key auto_increment,
username varchar(10),
password varchar(10)
);
insert into userTable values(1,"wby","123456");
第二步建实体类
(属性注意和数据表字段相对应)
package com.wby.entity;
/**
* Created by Administrator on 2017/11/20.
*/
public class User {
private int id;
private String username;
private String password;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
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;
}
}
第三步编写dao层
采用spring jdbcTemplate操作数据库
package com.wby.dao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
/**
* Created by Administrator on 2017/11/20.
*/
@Repository
public class UserDao {
@Autowired
private JdbcTemplate jdbcTemplate;
public int getCount(String username,String password){
String sql="select count(*) from userTable "+"where username=? and password=?";
return jdbcTemplate.queryForObject(sql, new Object[]{username, password}, Integer.class);
}
}
第四步编写service层
package com.wby.service;
import com.wby.entity.User;
import com.wby.dao.UserDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
/**
* Created by Administrator on 2017/11/20.
*/
@Service
public class UserService {
@Autowired
UserDao userDao;
public int getCount(User user){
return userDao.getCount(user.getUsername(),user.getPassword() );
}
}
第五部编写controller层
```
package com.wby.controller;
import com.wby.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;
import com.wby.entity.User;
//import com.wby.service.UserService;
import javax.servlet.http.HttpServletRequest;
/**
* Created by Administrator on 2017/11/20.
*/
@Controller
public class UserController {
@Autowired
UserService userService;
@RequestMapping("/index.html")
public ModelAndView Check(HttpServletRequest request,User user){
int a= userService.getCount(user);
if(a>0) {
request.getSession().setAttribute("user",user);
return new ModelAndView("main");
}
else
return new ModelAndView("index","error","用户名或者密码有误");
}
}
六spring框架的配置文件applicationContext.xml
配置数据源,jdbcTemplate,,数据管理器,事物增强…
<?xml version="1.0" encoding="UTF-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">
<!-- 扫描类包,将标注Spring注解的类自动转化Bean,同时完成Bean的注入 -->
<context:component-scan base-package="com.wby.dao"/>
<context:component-scan base-package="com.wby.service"/>
<!-- 配置数据源 -->
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close"
p:driverClassName="com.mysql.jdbc.Driver"
p:url="jdbc:mysql://localhost:3306/springmvc"
p:username="root"
p:password="root" />
<!-- 配置Jdbc模板 -->
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"
p:dataSource-ref="dataSource" />
<!-- 配置事务管理器 -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
p:dataSource-ref="dataSource" />
<!-- 通过AOP配置提供事务增强,让service包下所有Bean的所有方法拥有事务 -->
<aop:config proxy-target-class="true">
<aop:pointcut id="serviceMethod"
expression="(execution(* com.wby.service..*(..))) and (@annotation(org.springframework.transaction.annotation.Transactional))" />
<aop:advisor pointcut-ref="serviceMethod" advice-ref="txAdvice" />
</aop:config>
<tx:advice id="txAdvice" transaction-manager="transactionManager">
<tx:attributes>
<tx:method name="*" />
</tx:attributes>
</tx:advice>
</beans>
七springmvc框架的配置文件springmvc.xml
配置视图解析器,前缀后缀的设定
springmvc的默认配置文件是放在WEB-INF下的,叫action-servlet.xml
想改在resources下,那么就得修改web.xml下的分发器的servlet
<?xml version="1.0" encoding="UTF-8" ?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd">
<!-- 扫描web包,应用Spring的注解 -->
<context:component-scan base-package="com.wby.controller"/>
<!-- 配置视图解析器,将ModelAndView及字符串解析为具体的页面 -->
<bean
class="org.springframework.web.servlet.view.InternalResourceViewResolver"
p:prefix="/WEB-INF/jsp/"
p:suffix=".jsp" />
</beans>
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5"
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_2_5.xsd">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<!--
springmvc的默认配置文件是放在WEB-INF下的,叫action-servlet.xml
想改在resources下,那么就得修改web.xml下的分发器的servlet,具体如下:
-->
<servlet>
<servlet-name>action</servlet-name>
<servlet-class>
org.springframework.web.servlet.DispatcherServlet
</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:springmvc.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>action</servlet-name>
<url-pattern>*.html</url-pattern>
</servlet-mapping>
</web-app>
pom.xm(在pom.xnl文件中配上坐标,maven就会去远程仓库中下载相应的jar包,这就是前面所提及的一小段配置信息)
<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.wby</groupId>
<artifactId>demo1</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<file.encoding>UTF-8</file.encoding>
<spring.version>4.2.2.RELEASE</spring.version>
<mysql.version>5.1.29</mysql.version>
<servlet.version>3.0-alpha-1</servlet.version>
<aspectj.version>1.8.1</aspectj.version>
<commons-codec.version>1.9</commons-codec.version>
<commons-dbcp.version>1.4</commons-dbcp.version>
<hibernate.validator.version>5.0.2.Final</hibernate.validator.version>
<jetty.version>8.1.8.v20121106</jetty.version>
<slf4j.version>1.7.5</slf4j.version>
<testng.version>6.8.7</testng.version>
</properties>
<dependencies>
<!-- spring 依赖-->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>commons-dbcp</groupId>
<artifactId>commons-dbcp</artifactId>
<version>${commons-dbcp.version}</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>${servlet.version}</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>${aspectj.version}</version>
</dependency>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>${testng.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>${spring.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.codehaus.cargo</groupId>
<artifactId>cargo-core-api-container</artifactId>
<version>1.2.3</version>
</dependency>
</dependencies>
<build>
<plugins>
<!-- jetty插件 -->
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>maven-jetty-plugin</artifactId>
<version>6.1.25</version>
<configuration>
<connectors>
<connector implementation="org.mortbay.jetty.nio.SelectChannelConnector">
<port>8000</port>
<maxIdleTime>60000</maxIdleTime>
</connector>
</connectors>
<contextPath>/bbs</contextPath>
<scanIntervalSeconds>0</scanIntervalSeconds>
</configuration>
</plugin>
<plugin> <groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.17</version>
<configuration>
<parallel>methods</parallel>
<threadCount>10</threadCount>
</configuration>
</plugin>
</plugins>
</build>
</project>
index.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<form action="/index.html" method="post">
用户名 <input type="text" name="username">
密码<input type="text" name="password">
<input type="submit" value="提交">
</form>
</body>
</html>
main.jsp
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title></title>
</head>
<body>
当前用户为${user.username};
</body>
</html>
运行测试
输入
1
2