SSM整合(Maven)

最新推荐文章于 2022-01-19 16:32:59 发布

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本文详细介绍使用Maven搭建SSM框架（Spring+SpringMVC+MyBatis）的步骤，包括项目结构、依赖配置、配置文件编写等内容，并提供后端代码示例，最后进行单元测试验证。

话说：

各位读者盆友，晚上好！很早之前用普通Web项目总结过SSM整合流程(Spring+SpringMVC+MyBatis)，当时的jar包是手动添加进去的；
今天总结用Maven整合SSM框架。

但是最终部署Tomcat出了个大大的bug,搞不定~所以下一篇博客专门悬赏处理这个Bug哈，欢迎评论留言，感激不尽。

1）新建Maven项目整体结构
2）完善依赖pom.xml
3）配置文件
4）后端代码
pojo dao controller service
5）测试
测试后端
测试前端
6）总结

难度系数：★★★☆☆
建议用时：1H

1）新建Maven项目整体结构

这里写图片描述

2）完善依赖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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.hmc.demo</groupId>
  <artifactId>p2pFront2</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>p2pFront2 Maven Webapp</name>
  <url>http://maven.apache.org</url>

  <!-- 版本控制  灵活升级版本 -->
  <properties>
        <spring.version>4.3.14.RELEASE</spring.version>
  </properties> <!--这里的这个属性并没有提示 Alter + /出不来  -->

  <dependencies>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>

    <!--处理index.jsp乱码  HttpServlet  -->
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>javax.servlet-api</artifactId>
        <version>4.0.0</version>
        <scope>provided</scope>
    </dependency>



    <!-- ========================log4j======================  -->
    <dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.10.0</version>
    </dependency>

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



    <!-- ========================start Spring======================  -->

    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-core</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-beans</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>

    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-aop</artifactId>
    <version>${spring.version}</version>
</dependency>

    <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-orm</artifactId>
    <version>${spring.version}</version>
</dependency><!--  默认带上tx jdbc -->

     <dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-context-support</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-aspects</artifactId>
    <version>${spring.version}</version>
</dependency>
    <!-- ========================end  Spring======================  -->






    <!-- ========================start MyBatis======================  -->
        <dependency>
    <groupId>mysql</groupId>
    <artifactId>mysql-connector-java</artifactId>
    <version>5.1.45</version>
</dependency>



        <dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis</artifactId>
    <version>3.4.5</version>
</dependency>

        <dependency>
    <groupId>org.mybatis</groupId>
    <artifactId>mybatis-spring</artifactId>
    <version>1.3.1</version>
</dependency>




    <!-- ========================end  MyBatis======================  -->


    <!-- ========================start  jstl======================  -->
    <dependency>
    <groupId>javax.servlet.jsp.jstl</groupId>
    <artifactId>jstl</artifactId>
    <version>1.2</version>
</dependency>

    <!-- ========================end  jstl======================  -->






  </dependencies>
  <build>
    <finalName>p2pFront2</finalName>
  </build>
</project>

3）配置文件

spring.xml

        连接数据库
        把连接数据库和mapper.xml交给工厂管理
        orm配置

springmvc.xml

            扫描包及视图控制器

mybatis *.mapper.xml

        写SQL语句

web.xml

        把Spring交给web管理（Listener）
        springMVC核心

log4j.properties

## %p 输出优先级，即DEBUG，INFO，WARN，ERROR，FATAL  
## %r 输出自应用启动到输出该log信息耗费的毫秒数  
## %c 输出所属的类目，通常就是所在类的全名  
## %t 输出产生该日志事件的线程名  
## %n 输出一个回车换行符，Windows平台为“rn”，Unix平台为“n”  
## %d 输出日志时间点的日期或时间，默认格式为ISO8601，也可以在其后指定格式，比如：%d{yyy MMM dd HH:mm:ss,SSS}，输出类似：2002年10月18日 22：10：28，921  
## %l 输出日志事件的发生位置，包括类目名、发生的线程，以及在代码中的行数。举例：Testlog4.main(TestLog4.java:10)


 ### 设置###
log4j.rootLogger = debug,stdout

### 输出信息到控制抬 ###
log4j.appender.stdout = org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target = System.out
log4j.appender.stdout.Threshold = INFO 
log4j.appender.stdout.layout = org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern = [%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%l%n%m%n

### 输出DEBUG 级别以上的日志到=d://logs/error.log ###
log4j.appender.D = org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File = d://logs/log.log
log4j.appender.D.Append = true
log4j.appender.D.Threshold = ERROR 
log4j.appender.D.layout = org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern = %-d{yyyy-MM-dd HH:mm:ss}  [ %t:%r ] - [ %p ]  %m%n

### 输出ERROR 级别以上的日志到=d://logs/error.log ###
log4j.appender.E = org.apache.log4j.DailyRollingFileAppender
log4j.appender.E.File =d\://logs/error.log 
log4j.appender.E.Append = true
log4j.appender.E.Threshold = ERROR 
log4j.appender.E.layout = org.apache.log4j.PatternLayout
log4j.appender.E.layout.ConversionPattern =%-d{yyyy-MM-dd HH\:mm\:ss}  [ %t\:%r ] - [ %p ]  %m%n


### mybatis 显示SQL语句部分
log4j.logger.org.mybatis=DEBUG
#log4j.logger.cn.tibet.cas.dao=DEBUG
#log4j.logger.org.mybatis.common.jdbc.SimpleDataSource=DEBUG#
#log4j.logger.org.mybatis.common.jdbc.ScriptRunner=DEBUG#
#log4j.logger.org.mybatis.sqlmap.engine.impl.SqlMapClientDelegate=DEBUG#
#log4j.logger.java.sql.Connection=DEBUG
log4j.logger.java.sql=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.ResultSet=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG

db.properties

jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/db_p2p
jdbc.username=root
jdbc.password=119913

spring.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"
    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">


        <!-- 扫描包  方便注解用 除开spring mvc的Controller -->
        <context:component-scan base-package="com.hmc">

            <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Controller "/>
        </context:component-scan>

</beans>

spring-db.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"
    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">

       <!-- 加载静态资源 -->
       <context:property-placeholder location="classpath:db.properties"/>

        <!--连接数据库  -->
        <bean id="datasource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
            <property name="driverClassName" value="${jdbc.driver}"></property>
            <property name="url" value="${jdbc.url}"></property>
            <property name="username" value="${jdbc.username}"></property>
            <property name="password" value="${jdbc.password}"></property>
        </bean>


        <!--  全部交给Spring 工厂来管理-->
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <property name="dataSource" ref="datasource"></property>
            <property name="mapperLocations" value="classpath:mybatis/*.xml"></property>
        </bean>

        <!-- mybatis  扫描包 -->
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
            <property name="basePackage" value="com.hmc.dao"></property>
        </bean>




</beans>

springmvc.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">

    <!-- 自动加载 处理器映射器   -->
    <mvc:annotation-driven/>

    <!-- 扫描包  全部  刚好和spring分工明确 -->
    <context:component-scan base-package="com.hmc.controller"></context:component-scan>

    <!-- 视图解析器 -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>
 </beans>

UserMapper.xml

这个放在后端代码比较合适

web.xml

<!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>


  <!-- 配置 识别配置文件 -->
  <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring.xml,classpath:spring-db.xml</param-value>
  </context-param>


  <!--  把Spring交给web管理（Listener） -->
  <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>


  <!--配置SpringMVC核心-->
  <servlet>
        <servlet-name>springmvc</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <!-- springMVC的配置文件-->
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:springmvc.xml</param-value>
        </init-param>
  </servlet>

  <servlet-mapping>
    <servlet-name>springmvc</servlet-name>
    <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

4）后端代码
pojo dao controller service

pojo -User

package com.hmc.pojo;

import org.springframework.stereotype.Repository;

/**
*
*2018年3月10日
*User:Meice
*下午7:13:45
*/


public class User {
    /**
     * userId varchar(50),
            userName varchar(50) not null,
            userNick varchar(50)comment '昵称',
            password varchar(50),
            phone varchar(50),
            status int,
            type int,
            registerTime datetime,
            lastLoginTime datetime,
            detail int comment '用户信息详情',
            property int comment '用户资产关联表'
     */

    private String userId;
    private String userName;
    private String userNick;
    private String password;
    public User() {}
    public User(String userId, String userName, String userNick, String password) {
        super();
        this.userId = userId;
        this.userName = userName;
        this.userNick = userNick;
        this.password = password;
    }
    public String getUserId() {
        return userId;
    }
    public void setUserId(String userId) {
        this.userId = userId;
    }
    public String getUserName() {
        return userName;
    }
    public void setUserName(String userName) {
        this.userName = userName;
    }
    public String getUserNick() {
        return userNick;
    }
    public void setUserNick(String userNick) {
        this.userNick = userNick;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    @Override
    public String toString() {
        return "User [userId=" + userId + ", userName=" + userName + ", userNick=" + userNick + ", password=" + password
                + "]";
    }





}

dao

package com.hmc.dao;
/**
*
*2018年3月10日
*User:Meice
*下午7:15:51
*/

import java.util.List;

import com.hmc.pojo.User;

public interface UserDao {

    //查询用户列表
    List<User> userList ();
}

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">

<mapper namespace="com.hmc.dao.UserDao">

    <sql id="column_name">userId,userName,userNick,password</sql>
    <sql id="table_name">user</sql>
    <select id="userList" resultMap="userMap">
        SELECT
            <include refid="column_name"/>
        FROM
            <include refid="table_name"/>
    </select>

    <resultMap type="com.hmc.pojo.User" id="userMap">
        <id column="userId"  property="userId" javaType="String"/>
        <result column="userName" property="userName"  javaType="String"/>
        <result column="userNick" property="userNick"  javaType="String"/>
    </resultMap>



</mapper>

service

package com.hmc.service;

import java.util.List;

import com.hmc.pojo.User;

/**
*
*2018年3月10日
*User:Meice
*下午7:30:10
*/
public interface UserService {
    //查询用户列表
        List<User> userList ();
}

serviceImpl

package com.hmc.service;

import java.util.List;

import javax.annotation.Resource;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import com.hmc.dao.UserDao;
import com.hmc.pojo.User;

/**
*
*2018年3月10日
*User:Meice
*下午7:30:33
*/
@Service("userService")
public class UserServiceImpl implements UserService {

    //调用Dao层方法
    @Autowired
    public UserDao userDao;

    public List<User> userList() {

        return userDao.userList();
    }

}

controller

package com.hmc.controller;

import java.util.List;

import javax.annotation.Resource;

import org.apache.log4j.Logger;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;

import com.hmc.pojo.User;
import com.hmc.service.UserService;

/**
*
*2018年3月11日
*User:Meice
*上午2:44:52
*/
@Controller
public class UserController {

    public Logger log = Logger.getLogger(this.getClass());

    @Resource(name="userService")
    public UserService userService;

    public String userList(Model model) {
        List<User> userList = userService.userList();
        model.addAttribute("userList", userList);
        log.info("前台查询数据为:"+userList);
        return "userList";
    }


}

5）测试
测试后端
测试前端

测试后端-TestUserList

package p2pFront2;


import java.util.List;

import javax.annotation.Resource;

import org.apache.log4j.Logger;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.stereotype.Service;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import com.hmc.pojo.User;
import com.hmc.service.UserService;

/**
*
*2018年3月10日
*User:Meice
*下午7:13:26
*/
//查询用户列表 单元测试

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations= {"classpath:spring.xml","classpath:spring-db.xml"})
public class TestUserList {

    public Logger log = Logger.getLogger(this.getClass());

    @Resource(name="userService")
    public UserService userService;

    @Test
    public void testUserList() {
        log.info("=-=====测试用户列表================");

        List<User> userList = userService.userList();
        log.info("用户列表为:"+userList);

    }

    /**
     * 测试结果：
     * [INFO ] 2018-03-11 02:26:35,339 method:p2pFront2.TestUserList.testUserList(TestUserList.java:40)
用户列表为:[User [userId=b5ccf611-66a6-4f6a-b65c-7a5e24a79d11, userName=user1, userNick=用户1, password=111111], User [userId=e042d140-b90a-4193-8295-6d2109fc80af, userName=user
     */
}

测试成功！But….前端出了问题…

测试前端

Tomcat启动报错....
ERROR SqlExceptionHelper Cannot create PoolableConnectionFactory (Unknown database 'meice_blog')
    ERROR ContextLoader Context initialization failed
 org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'blogAction': 

下一篇博客专门悬赏处理这个bug，以为我的项目根本不存在这个meice_blog?太古怪了！！

6）总结

1.不用记住怎么配置，关键是配置之间的关系；

2.maven单元测试报java.lang.IllegalStateException: Failed to load ApplicationContext
casued by cannot create bean “”,”“’
表明spring工厂创建有问题，原因很多，主要看caused by .一般caused by 原因也一大串，怎么办？一般有以下原因：

1)配置文件有问题：applicationConfig.xml mapper.xml

1）查看凡是<property name="dataSource">这里面的name属性，要完全按照你引用的类中定义的属性来写！不能自作主张，因为你用人家的类，就要乖乖用人家命名好的属性。怎么查看属性？直接双击打开类，查找即可。有继承关系的，继续往上找；

2）<property name="mapperLocations" value="classpath:mybatis/*.xml"></property>
     加载文件的，要用classpath:把路径写对

3）mapper.xml 中要写对。
        <mapper namespace="com.hmc.dao.UserDao">中的namespace要指定，确保唯一的方法；
        手动映射时候：<result column="userName" property="userName"  javaType="String"/> 数据库列；pojo属性及javaType或者jdbcType；如果是一对多，用ofType不要遗漏。

2)文件路径找不到 classpath:spring.xml

     如果是多个文件：
    @RunWith(SpringJUnit4ClassRunner.class)
    @ContextConfiguration(locations= {"classpath:spring.xml","classpath:spring-db.xml"})

未完待续……下一篇悬赏处理前端部署Tomcat的Bug~

晚安~~ . 再会！