【Maven】通过Maven新建一个webapp项目（SSM）

前言：

上一章配置好eclipse+Maven环境后，此处接着写创建webapp项目。

一、创建webapp项目。

file/New Maven Project/选择默认存储路径/搜索webapp/输入包名项目名等。





MavenApp项目就自动构建成功了。

二、处理两个问题

1、自动构建的项目，此处可能回出现index.jsp报错。通过如下方法解决比较稳妥。

选择项目／右键Properties／



项目结构如下：



2、java，test文件夹缺失。

新建Folder--->java，test，test/java。



构建成功之后，然后通过Maven来写一遍SpringMVC控制器。

三、直接上依赖配置pom.xml（SSM框架）

<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>com.haibo</groupId>
<artifactId>mvnStudy01</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>mvnStudy01 Maven Webapp</name>
<url>http://maven.apache.org</url>
<!-- 初始化框架的版本号 -->
<properties>
<spring.version>4.3.3.RELEASE</spring.version>
</properties>

<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<!-- 加入ServletAPI -->
<!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.3</version>
<scope>provided</scope>
</dependency>
<!-- MySQL依赖 start -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.38</version>
</dependency>
<!-- MySQL依赖 end -->
<!-- 加入MyBatis 依赖 start -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.2.5</version>
</dependency>
<!-- 加入MyBatis 依赖 end -->
<!-- Log4j start -->
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<!-- Log4j end -->
<!-- 引入Spring(包含SpringMVC) 依赖 start -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-oxm</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>${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>org.springframework</groupId>
<artifactId>spring-aop</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-test</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 引入Spring 依赖 end -->
<!-- 引用c3p0 依赖 start -->
<dependency>
<groupId>com.mchange</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.2.1</version>
</dependency>
<!-- 引用c3p0 依赖 end -->
<!-- 引用插件依赖：MyBatis整合Spring -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>
<!-- JSTL -->
<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
</dependencies>
<build>
<finalName>mvnStudy01</finalName>
</build>
</project>

右键项目／Maven／Update Project。更新Jar包。

四、配置SpringMVC

web.xml中添加Servlet：

<!DOCTYPE web-app PUBLIC
"-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
"http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
<display-name>Archetype Created Web Application</display-name>
<!-- 创建分发Servlet -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:conf/springmvc-servlet.xml</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
</web-app>

具体这个位置classpath:conf/springmvc-servlet.xml其实就是下图这个位置：



springmvc-servlet.xml如下：

<?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:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd"> <!-- 配置handlerMapping -->
<bean class="org.springframework.web.servlet.mvc.support.ControllerBeanNameHandlerMapping"></bean>
<!-- 配置视图解析器 -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<!-- 前缀 :说明如果直接放在web-inf下，不需要加前缀-->
<property name="prefix" value="WEB-INF/view/"></property>
<!-- 后缀 ： -->
<property name="suffix" value=".jsp"></property>
</bean>

<!-- 加入注解驱动 -->
<mvc:annotation-driven></mvc:annotation-driven>
<!-- 扫描器 -->
<context:component-scan base-package="controller"></context:component-scan>
</beans>

然后扫描一下controller文件夹中的controller组件。

package controller;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

@Controller
public class HelloMvc {
@RequestMapping(value="/a.do",produces="text/html;charset=UTF-8")
public @ResponseBody String hello() {
return "你好";
}
}

顺便说一句以上代码加了中文返回处理produces="text/html;charset=UTF-8",则可以正常的显示中文。

五、接入Spring

在web.xml中加入配置：

<!-- 配置Spring1:配置spring-servlet.xml路劲 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:conf/spring.xml</param-value>
</context-param>
<!-- 配置Spring2:配置Spring监听2 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

然后新建spring.xml文件在路径conf下。（此处同springmvc-servlet.xml位置）

<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd"> <context:component-scan base-package="model"></context:component-scan>
</beans>

在main文件下新建model，如下图



测试一下，新建一个Person.java接口：

package model;

public interface Person {
void say();
}

新建一个Person的实现类：

package model;

import org.springframework.stereotype.Component;

@Component
public class Police implements Person {
public void say() {
System.out.println("我是警察");
}
}

修改HelloMvc写一个Controller：

package controller;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import model.Person;

@Controller
public class HelloMvc {
@RequestMapping(value="/a.do",produces="text/html;charset=UTF-8")
public @ResponseBody String hello() {
return "你好";
}
@Autowired
Person p;

@RequestMapping(value="/b.do",produces="text/html;charset=UTF-8")
public @ResponseBody String personWho() {
p.say();
return "你好,人类";
}
}

六、接入Mybatis。

1、在conf下加入可用的数据库配置文件。



2、修改spring.xml中：

<?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:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.3.xsd"> <context:component-scan base-package="model"></context:component-scan>
<context:component-scan base-package="dao"></context:component-scan>
<!-- 引入配置文件 -->
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:conf/jdbc.property" />
</bean>
<bean id="dataSource" class="org.apache.tomcat.dbcp.dbcp2.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${driver}" />
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<!-- 初始化连接大小 -->
<property name="initialSize" value="${initialSize}"></property>
<!-- 连接池最大数量 -->
<!-- <property name="maxActive" value="${maxActive}"></property> -->
<!-- 连接池最大空闲 -->
<!-- <property name="maxIdle" value="${maxIdle}"></property>   -->
<!-- 连接池最小空闲 -->
<!-- <property name="minIdle" value="${minIdle}"></property>   -->
<!-- 获取连接最大等待时间 -->
<!-- <property name="maxWait" value="${maxWait}"></property>   -->
</bean>

<!-- spring和MyBatis完美整合，不需要mybatis的配置映射文件 -->
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<!-- 自动扫描mapping.xml文件 -->
<property name="mapperLocations" value="classpath:mapping/*.xml"></property>
</bean>

<!-- DAO接口所在包名，Spring会自动查找其下的类 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>

<!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
</beans>

3、配置Maybtis自动生成插件

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE generatorConfiguration PUBLIC "-//mybatis.org//DTD MyBatis Generator Configuration 1.0//EN" "http://mybatis.org/dtd/mybatis-generator-config_1_0.dtd">
<generatorConfiguration>
<!-- 数据库驱动-->
<classPathEntry  location="/Users/user/Documents/maven/mysql/mysql-connector-java/5.1.38/mysql-connector-java-5.1.38.jar"/>
<context id="DB2Tables"  targetRuntime="MyBatis3">
<commentGenerator>
<property name="suppressDate" value="true"/>
<!-- 是否去除自动生成的注释 true：是 ： false:否 -->
<property name="suppressAllComments" value="true"/>
</commentGenerator>
<!--数据库链接URL，用户名、密码 -->
<jdbcConnection driverClass="com.mysql.jdbc.Driver" connectionURL="jdbc:mysql://localhost:3306/ebook" userId="root" password="haibo1118">
</jdbcConnection>
<javaTypeResolver>
<property name="forceBigDecimals" value="false"/>
</javaTypeResolver>
<!-- 生成模型的包名和位置-->
<javaModelGenerator targetPackage="model" targetProject="mvnStudy01/src/main/java">
<property name="enableSubPackages" value="true"/>
<property name="trimStrings" value="true"/>
</javaModelGenerator>
<!-- 生成映射文件的包名和位置-->
<sqlMapGenerator targetPackage="mapping" targetProject="mvnStudy01/src/main/java">
<property name="enableSubPackages" value="true"/>
</sqlMapGenerator>
<!-- 生成DAO的包名和位置-->
<javaClientGenerator type="XMLMAPPER" targetPackage="dao" targetProject="mvnStudy01/src/main/java">
<property name="enableSubPackages" value="true"/>
</javaClientGenerator>
<!-- 要生成的表 tableName是数据库中的表名或视图名 domainObjectName是实体类名-->
<table tableName="biquge" domainObjectName="Book" enableCountByExample="false" enableUpdateByExample="false" enableDeleteByExample="false" enableSelectByExample="false" selectByExampleQueryId="false"></table>
</context>
</generatorConfiguration>

右键这个文件，自动在指定位置生成三个类。



此处遇到问题有两个：

一个是Exception in thread “main” java.lang.RuntimeException: Exception getting JDBC Driver：

通过在generatorConfiguration中添加数据库驱动解决：

<classPathEntry  location="/Users/user/Documents/maven/mysql/mysql-connector-java/5.1.38/mysql-connector-java-5.1.38.jar"/>

第二个是自动生成的时候默认的位置指定不对，改成绝对路径即可mvnStudy01/src/main/java。

4、写service用来操作Mybatis操作数据库。

接口：

package service;

import model.Book;

public interface IBookService {
Book getBookById(String bookId);
}

实现：

package service;

import javax.annotation.Resource;

import org.springframework.stereotype.Service;

import dao.BookMapper;
import model.Book;

@Service("userService")
public class BookServiceImpl implements IBookService{
@Resource
private BookMapper bookDao;

public Book getBookById(String bookId) {
// TODO Auto-generated method stub
return this.bookDao.selectByPrimaryKey(bookId);
}
}

5、写Controller用来请求操作。

package controller;

import java.io.IOException;

import javax.annotation.Resource;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import model.Book;
import model.Person;
import service.IBookService;

@Controller
public class HelloMvc {
@RequestMapping(value="/a.do",produces="text/html;charset=UTF-8")
public @ResponseBody String hello() {
return "你好";
}
@Autowired
Person p;

@RequestMapping(value="/b.do",produces="text/html;charset=UTF-8")
public @ResponseBody String personWho() {
p.say();
return "你好,人类";
}

@Resource
private IBookService bookService = null;

@RequestMapping(value="/c.do",produces="text/html;charset=UTF-8")
public @ResponseBody String addrShow(){
return bookService.getBookById("59cc3a7f3ea44b15c1f92ac0").toString();
}
}

6、不要忘了在spring.xml中添加扫描文件夹：

<context:component-scan base-package="model"></context:component-scan>
<context:component-scan base-package="dao"></context:component-scan>
<context:component-scan base-package="mapping"></context:component-scan>
<context:component-scan base-package="service"></context:component-scan>

ok，我自测通过，完成。

源码请去github自行下载。