SSM框架学习（二）搭建ssm项目

其他 2018-07-12 14:58:15 阅读次数: 0

转载的：https://my.oschina.net/u/3486331/blog/901531

1、ssm系统架构

mapper层（MyBatis）里提供解决问题的方法，然后dao层调用mapper的方法，service层调用dao层的方法，然后就让controller层调用service的接口方法来干活，业务逻辑都在controller层里。


2.使用idea+mavn创建项目

假定事先配置好maven，新建项目，如下：


我们需要的目录结构如下：

按照目录，创建好目录。


初始pom.xml文件：

在pom.xml中添加需要的jar包：

<?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>ssm</groupId>
  <artifactId>boke</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>war</packaging>

  <name>boke Maven Webapp</name>
  <!-- FIXME change it to the project's website -->
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
    <!-- spring版本号 -->
    <spring.version>4.2.5.RELEASE</spring.version>
    <!-- mybatis版本号 -->
    <mybatis.version>3.2.8</mybatis.version>
  </properties>

  <dependencies>
    <!-- 单元测试 -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.11</version>
      <!-- 表示开发的时候引入，发布的时候不会加载此包 -->
      <scope>test</scope>
    </dependency>
    <!-- 第一部分：Spring 配置-->
    <!-- spring核心包 -->
    <!-- Spring core -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-beans</artifactId>
      <version>${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>
    <!-- Spring DAO -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!--spring 事务管理支持-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- Spring mvc -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</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-test</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!--spring aop编程支持-->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aspects</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <!-- 第二部分：Servlet web -->
    <!-- 添加sevlet支持 -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>javax.servlet-api</artifactId>
      <version>3.0.1</version>
      <scope>provided</scope>
    </dependency>
    <!-- 添加jsp支持 -->
    <dependency>
      <groupId>javax.servlet.jsp</groupId>
      <artifactId>jsp-api</artifactId>
      <version>2.2</version>
      <scope>provided</scope>
    </dependency>
    <!-- 添加jstl支持 -->
    <dependency>
      <groupId>javax.servlet</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>
    <dependency>
      <groupId>taglibs</groupId>
      <artifactId>standard</artifactId>
      <version>1.1.2</version>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.9.4</version>
    </dependency>
    <!-- 第三部分：数据库和mybatis -->
    <!-- 数据库 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>5.1.38</version>
    </dependency>
    <!-- 数据库连接池 -->
    <dependency>
      <groupId>com.mchange</groupId>
      <artifactId>c3p0</artifactId>
      <version>0.9.5.2</version>
    </dependency>
    <!-- MyBatis -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>
    <!-- mybatis-spring整合包 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.3.1</version>
    </dependency>
    <!-- 第四部分：日志 -->
    <!-- 实现slf4j接口并整合 -->
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>1.1.1</version>
    </dependency>

    <!-- 添加阿里巴巴连接池Druid支持 -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>druid</artifactId>
      <version>1.0.16</version>
    </dependency>

    <!-- 添加log4j日志 -->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.17</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>1.7.21</version>
    </dependency>
    <!-- apache共公包 -->
    <dependency>
      <groupId>commons-logging</groupId>
      <artifactId>commons-logging</artifactId>
      <version>1.2</version>
    </dependency>
  </dependencies>

  <build>
    <finalName>boke</finalName>
    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
      <plugins>
        <plugin>
          <artifactId>maven-clean-plugin</artifactId>
          <version>3.0.0</version>
        </plugin>
        <!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
        <plugin>
          <artifactId>maven-resources-plugin</artifactId>
          <version>3.0.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-compiler-plugin</artifactId>
          <version>3.7.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-surefire-plugin</artifactId>
          <version>2.20.1</version>
        </plugin>
        <plugin>
          <artifactId>maven-war-plugin</artifactId>
          <version>3.2.0</version>
        </plugin>
        <plugin>
          <artifactId>maven-install-plugin</artifactId>
          <version>2.5.2</version>
        </plugin>
        <plugin>
          <artifactId>maven-deploy-plugin</artifactId>
          <version>2.8.2</version>
        </plugin>
      </plugins>
    </pluginManagement>
  </build>
</project>

新建mybatis-conf.xml文件

这个文件主要配置mybatis全局配置文件
例如 别名 驼峰命名自动转换等 在这里我暂时只配置别名

<?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">
<configuration>
    <!-- 别名 -->
    <typeAliases>
        <package name="ssm.blog.entity"/>
    </typeAliases>
</configuration>

新建spring-beans.xml文件

整合主要步骤

  • 开启包扫描
  • 配置druid数据源
  • 列表内容
  • 配置sqlSessionFactory

  • 开启mybatis dao接口扫描

<?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:tx="http://www.springframework.org/schema/tx"
       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.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
    <!-- 开启包扫描-->
    <context:component-scan base-package="ssm.blog"/>
    <!-- 配置druid数据源 -->
    <bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
        <property name="username" value="root"/>
        <property name="password" value="root"/>
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
        <property name="url" value="jdbc:mysql://localhost:3306/db_blog"/>
<!-- 
db_blog：数据库名字
--> </ bean > <!-- 配置 mybatis 的 sqlSessionFactory --> < bean id ="sqlSessionFactory" class ="org.mybatis.spring.SqlSessionFactoryBean" > < property name ="dataSource" ref ="dataSource" /> <!-- 自动扫描 mapper.xml 文件 --> < property name ="mapperLocations" value ="classpath:mapper/*.xml" /> <!-- 载入 mybatis 全局配置文件 --> < property name ="configLocation" value ="classpath:mybatis-conf.xml" /> </ bean > <!-- 配置 mybatis dao 接口扫描 --> < bean class ="org.mybatis.spring.mapper.MapperScannerConfigurer" > < property name ="basePackage" value ="ssm.blog.dao" /> < property name ="sqlSessionFactoryBeanName" value ="sqlSessionFactory" /> </ bean > <!-- 配置 spring 的声明式事务，名字为默认值 --> < bean id ="transactionManager" class ="org.springframework.jdbc.datasource.DataSourceTransactionManager" > < property name ="dataSource" ref ="dataSource" /> </ bean > <!-- 开启事务控制的注解支持 --> < tx :annotation-driven transaction-manager ="transactionManager" /> </ beans > 
创建表：
CREATE TABLE `t_blogger` (
  `id` INT(11) NOT NULL AUTO_INCREMENT COMMENT '博主id',
  `username` VARCHAR(50) NOT NULL COMMENT '博主姓名',
  `password` VARCHAR(100) NOT NULL COMMENT '博主密码',
  `profile` TEXT COMMENT '博主信息',
  `nickname` VARCHAR(50) DEFAULT NULL COMMENT '博主昵称',
  `sign` VARCHAR(100) DEFAULT NULL COMMENT '博主签名',
  `imagename` VARCHAR(100) DEFAULT NULL COMMENT '博主头像路径',
  PRIMARY KEY (`id`)
) ENGINE=INNODB AUTO_INCREMENT=2 DEFAULT CHARSET=utf8;

2、实体类

package ssm.blog.entity;

import org.springframework.stereotype.Component;

import java.io.Serializable;

/**
 * Created by xp on 2017/4/13.
 * @author xp
 * @Description 博主信息实体类
 */
@Component  //注册bean 为spring容器管理
public class Blogger implements Serializable {

    private Integer id;
    private String userName;    //用户名
    private String password;    //密码
    private String profile;     //博主信息
    private String nickName;    //昵称
    private String sign;        //博主签名
    private String imageName;   //图片路径

    public Blogger(String userName, String password, String profile, String nickName, String sign, String imageName) {
        this.userName = userName;
        this.password = password;
        this.profile = profile;
        this.nickName = nickName;
        this.sign = sign;
        this.imageName = imageName;
    }

    public Blogger() {
    }

    public Integer getId() {
        return id;
    }

    public void setId(Integer 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;
    }

    public String getProfile() {
        return profile;
    }

    public void setProfile(String profile) {
        this.profile = profile;
    }

    public String getNickName() {
        return nickName;
    }

    public void setNickName(String nickName) {
        this.nickName = nickName;
    }

    public String getSign() {
        return sign;
    }

    public void setSign(String sign) {
        this.sign = sign;
    }

    public String getImageName() {
        return imageName;
    }

    public void setImageName(String imageName) {
        this.imageName = imageName;
    }

    @Override
    public String toString() {
        return "Blogger{" +
                "id=" + id +
                ", userName='" + userName + '\'' +
                ", password='" + password + '\'' +
                ", profile='" + profile + '\'' +
                ", nickName='" + nickName + '\'' +
                ", sign='" + sign + '\'' +
                ", imageName='" + imageName + '\'' +
                '}';
    }
}

3、dao接口以及mapper文件
dao接口

package ssm.blog.dao;

import org.springframework.stereotype.Repository;
import ssm.blog.entity.Blogger;

/**
 * Created by xp on 2017/4/13.
 * 博主dao接口
 */
@Repository //注册为持久层的bean
public interface BloggerDao {
    /**
     * 查询博主信息
     * @return
     */
    Blogger getBloggerData();
}

mapper

<?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">
<mapper namespace="ssm.blog.dao.BloggerDao">
    <!--
        返回结果映射
        如果开启驼峰命名转换且命名规范该段代码可以不写
        因为配置别名 所以type属性使用的是mybatis-conf中的别名
        -->
    <resultMap type="Blogger" id="BloggerResult">
        <id property="id" column="id"/>
        <result property="userName" column="username"/>
        <result property="password" column="password"/>
        <result property="profile" column="profile"/>
        <result property="nickName" column="nickname"/>
        <result property="sign" column="sign"/>
        <result property="imageName" column="imagename"/>
    </resultMap>
    <!--  定义字段集合 -->
    <sql id="BloggerColumns">
        id,username,password,profile,nickname,sign,imagename
    </sql>
    <!-- 接口中getBloggerData 具体实现-->
    <select id="getBloggerData" resultMap="BloggerResult">
            select <include refid="BloggerColumns"/>    from t_blogger where id = 1
    </select>
</mapper>

4、log4j.properties 文件
创建log4j.properties 打印日志 查看执行sql语句

log4j.rootLogger=DEBUG, Console  

#Console  
log4j.appender.Console=org.apache.log4j.ConsoleAppender  
log4j.appender.Console.layout=org.apache.log4j.PatternLayout  
log4j.appender.Console.layout.ConversionPattern=%d [%t] %-5p [%c] - %m%n  

log4j.logger.java.sql.ResultSet=INFO  
log4j.logger.org.apache=INFO  
log4j.logger.java.sql.Connection=DEBUG  
log4j.logger.java.sql.Statement=DEBUG  
log4j.logger.java.sql.PreparedStatement=DEBUG

5、创建测试类并测试
BloggerDaoTest

package ssm.blog.dao;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import ssm.blog.entity.Blogger;

import javax.annotation.Resource;

import static org.junit.Assert.*;

/**
 * Created by xp on 2017/4/13.
 */
@RunWith(SpringJUnit4ClassRunner.class) //使用spring测试
@ContextConfiguration(locations = "classpath:spring-beans.xml") //设置spring配置文件路径
public class BloggerDaoTest {

    @Resource   //注入BloggerDao对象
    private BloggerDao bloggerDao;

    @Test
    public void getBloggerData() throws Exception {
        Blogger blogger = bloggerDao.getBloggerData();
        System.out.println(blogger);
    }

}

打印结果



成功打印结果 说明spring与mybatis整合成功

2.3spring与springmvc整合

2.3.1创建spring-mvc.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:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       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.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd">

    <!-- 扫描所有ssm.blog.controller包下面的所有controller -->
    <context:component-scan base-package="ssm.blog.controller"/>
    <!-- 开启注解配置-->
    <mvc:annotation-driven/>
    <!-- 静态资源解析，包括js,css,img... -->
    <mvc:resources location="/static/" mapping="/static/**"/>
    <!-- 配置视图解析器-->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <!--视图前缀-->
        <property name="prefix" value="/"/>
        <!--视图后缀-->
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

2.3.2 配置web.xml文件

注释讲的很清楚 我就不再讲了

<?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_3_0.xsd"
         id="WebApp_ID" version="3.0">

    <!--spring配置文件路径-->
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-beans.xml</param-value>
    </context-param>
    <!-- 配置spring监听器-->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <!--spring mvc核心servlet-->
    <servlet>
        <servlet-name>dispatcherServlet</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <!-- 初始化参数配置 springnvc配置文件路径-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
        <async-supported>true</async-supported>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
    <servlet-mapping>
        <servlet-name>dispatcherServlet</servlet-name>
        <url-pattern>*.html</url-pattern>
    </servlet-mapping>
    <!-- 编码过滤器 -->
    <filter>
        <filter-name>encodingFilter</filter-name>
        <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
        <async-supported>true</async-supported>
        <init-param>
            <param-name>encoding</param-name>
            <param-value>UTF-8</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>encodingFilter</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
</web-app>

2.3.2测试

新建BloggerController

package ssm.blog.controller;

import jdk.internal.org.objectweb.asm.tree.analysis.Value;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

/**
 * Created by xp on 2017/4/13.
 * 博主控制器
 */
@Controller  //注册为控制器bean
@RequestMapping(value = "/blog")    //请求路径
public class BloggerController {

    @ResponseBody  //返回json数据
    @RequestMapping(value="/hello")
    public String hello(){
        return "hello";
    }

}
发布项目到tomcat

打开浏览器输入：http://localhost:8080/blog/hello.do

结果：


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