快速搭建SSM demo
前言搭建思路快速ssm搭建方法1)各种文件、 包创建路径2)配置文件信息(1)pom.xml(2)web.xml(3)applicationContext.xml(4)springmvc-config.xml(5)jdbc.properties(6)UserMapper.xml(7)mybatis-config.xml(8)数据库脚本
3)java代码(1)UserMapper(2)User(3)TestSSM
前言
最近看面试题的时候,刷到有面试官的抱怨,说面试了30多个,让他们搭建个SSM(spring+springMVC+mybatis),都没一个搭建出来.于是乎扪心自问,自己如果盲打的话,应该也是不行,所以来整理一下,希望通过整理,能让大家和我一起回顾一下.
搭建思路
搭建方法有两种,.一种是比较基础的,可以很容易看出哪里出错,一步步搭建;可点击一下链接: --------------Java搭建SSM框架demo技能(详细到你害怕) get∨ 新手学习的话,建议选择方法一,因为每一步都相对比较独立,错误信息比较容易找.如果要快速搭建代码请: 使用环境:
eclipsetomcat8.0maven3.5.3mysql
快速ssm搭建方法
1)各种文件、 包创建路径
如下图显示
2)配置文件信息
(1)pom.xml
<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.company</groupId>
<artifactId>ssm-demo</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>war</packaging>
<!-- 集中定义依赖版本号 -->
<properties>
<junit.version>4.10</junit.version>
<spring.version>4.1.3.RELEASE</spring.version>
<mybatis.version>3.2.8</mybatis.version>
<mybatis.spring.version>1.2.2</mybatis.spring.version>
<mysql.version>5.1.32</mysql.version>
<druid.version>1.1.6</druid.version>
<slf4j.version>1.6.4</slf4j.version>
<jstl.version>1.2</jstl.version>
<servlet-api.version>2.5</servlet-api.version>
<jsp-api.version>2.0</jsp-api.version>
<jackson.version>2.4.2</jackson.version>
</properties>
<dependencies>
<!-- 单元测试 -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<!-- 整合spring框架（包含springmvc） 这个jar文件包含springmvc开发时的核心类, 同时也会将依赖的相关jar文件引入进来(spring的核心jar文件也包含在内) -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>${spring.version}</version>
</dependency>
<!--这个jar文件包含对Spring对JDBC数据访问进行封装的所有类 -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>${spring.version}</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aspects</artifactId>
<version>${spring.version}</version>
</dependency>
<!-- 整合mybatis框架 -->
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>${mybatis.version}</version>
</dependency>
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>${mybatis.spring.version}</version>
</dependency>
<!-- mysql驱动 -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>${mysql.version}</version>
</dependency>
<!-- druid连接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid</artifactId>
<version>${druid.version}</version>
</dependency>
</dependencies>
</project>
(2)web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://java.sun.com/xml/ns/javaee"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="2.5">
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
</welcome-file-list>
<!-- 配置springmvc, 将所有请求交给springmvc来处理 -->
<servlet>
<servlet-name>springmvc</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<!-- 配置springmvc核心配置文件的位置，默认Springmvc的配置文件是在WEB-INF目录下，默认的名字为springmvc-servlet.xml，如果要放在其他目录，则需要指定如下配置： -->
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring/*.xml</param-value>
</init-param>
</servlet>
<!-- 其中的斜杠（/）表示拦截所有请求（除JSP以外）, 所有请求都要经过springmvc前端控制器 -->
<servlet-mapping>
<servlet-name>springmvc</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>
<!-- 乱码处理过滤器 -->
<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<!-- 指定编码集 -->
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<!-- 指定拦截方式为截所有请求 -->
<url-pattern>/*</url-pattern>
</filter-mapping>
</web-app>
(3)applicationContext.xml
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:context="http://www.springframework.org/schema/context" xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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/aop http://www.springframework.org/schema/aop/spring-aop-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/util http://www.springframework.org/schema/util/spring-util-4.0.xsd">
<!-- 1.加载jdbc.properties文件的位置 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 2.配置druid连接池 ，id是固定值，class是druid连接池类的全路径 -->
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<!-- 配置连接数据库的基本信息 -->
<property name="driverClassName" value="${db.driverClassName}"></property>
<property name="url" value="${db.url}"></property>
<property name="username" value="${db.username}"></property>
<property name="password" value="${db.password}"></property>
</bean>
<!-- 3.整合spring和mybatis框架
将SqlSession等对象的创建交给Spring容器
id值(sqlSessionFactory)是固定值
-->
<bean id="sqlSessionFactory"
class="org.mybatis.spring.SqlSessionFactoryBean">
<!-- 3.1.指定mybatis核心配置文件的位置 -->
<property name="configLocation"
value="classpath:mybatis/mybatis-config.xml"></property>
<!-- 3.2.配置连接池(数据源) ref指向连接池bean对象的id值 -->
<property name="dataSource" ref="dataSource"></property>
<!-- 3.3、扫描所有的 XxxMapper.xml映射文件，读取其中配置的SQL语句 -->
<property name="mapperLocations" value="classpath:mybatis/mapper/*.xml"/>
</bean>
<!-- 4、定义mapper接口扫描器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<!-- 扫描所有XxxMapper接口，将接口实例的创建交给spring容器 -->
<property name="basePackage"
value="com.company.dao"/>
</bean>
<!-- 5.配置需要扫描的包(service层)：spring自动去扫描 base-package下的类，
如果扫描到的类上有 @Controller、@Service、@Component等注解，
将会自动将类注册为bean（即由spring创建实例）
-->
<context:component-scan
base-package="com.company.service">
</context:component-scan>
</beans>
(4)springmvc-config.xml
<?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:mvc="http://www.springframework.org/schema/mvc"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
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">
<!-- 1.配置前端控制器放行静态资源(html/css/js等，否则静态资源将无法访问) -->
<mvc:default-servlet-handler/>
<!-- 2.配置注解驱动，用于识别注解（比如@Controller） -->
<mvc:annotation-driven></mvc:annotation-driven>
<!-- 3.配置需要扫描的包：spring自动去扫描 base-package 下的类，
如果扫描到的类上有 @Controller、@Service、@Component等注解，
将会自动将类注册为bean
-->
<context:component-scan base-package="com.company.controller">
</context:component-scan>
<!-- 4.配置内部资源视图解析器
prefix:配置路径前缀
suffix:配置文件后缀
-->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/pages/"/>
<property name="suffix" value=".jsp"/>
</bean>
</beans>
(5)jdbc.properties
db.driverClassName=com.mysql.jdbc.Driver
db.url=jdbc:mysql:///mydbtext?characterEncoding=utf-8
db.username=root
db.password=123456
(6)UserMapper.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<!-- 门店表的映射文件 namespace值为对应接口的全路径 -->
<mapper namespace="com.company.dao.UserMapper">
<!-- 1.查询所有用户信息，id值为对应接口中方法的名字
resultType指定将查询的结果封装到哪个pojo对象中
-->
<select id="findAll" resultType="com.company.pojo.User">
select * from User;
</select>
</mapper>
(7)mybatis-config.xml
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<!-- MyBatis的全局配置文件 -->
<configuration >
</configuration>
(8)数据库脚本
drop database if exists mydbtext;
create database mydbtext charset utf8;
use mydbtext;
create table user(
username varchar(30),
pwd varchar(10)
);
insert into user values("zhangsan","123456");
insert into user values("lisi","12345");
3)java代码
(1)UserMapper
package com.company.dao;
import java.util.List;
import com.company.pojo.User;
public interface UserMapper {
/**
* 1.查询所有用户信息
*/
public List<User> findAll();
}
(2)User
package com.company.pojo;
public class User {
private String username;
private String pwd;
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPwd() {
return pwd;
}
public void setPwd(String pwd) {
this.pwd = pwd;
}
@Override
public String toString() {
return "User [username=" + username + ", pwd=" + pwd + "]";
}
}
(3)TestSSM
package com.company.controller;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import com.company.dao.UserMapper;
import com.company.pojo.User;
@Controller
public class TestSSM {
/** 自动装配：由spring自动为属性赋值(对象) */
@Autowired
UserMapper usermapper;
@RequestMapping("/hellossm")
public String holleMVC() {
//1.调用findAll方法查询所有门店信息
List<User> list = usermapper.findAll();
//2.遍历所有门店信息
for (User user : list) {
System.out.println(user);
}
return "test2";
}
}
