SSM整合的一些细节问题

今天做了SSM的整合，还是纸上得来终觉浅，绝知此事要躬行啊，废话少说，开始整合的第一步，此整合用到了Maven项目管理工具，首先处理pom.xml（相关jar包可以从maven仓库中下载）http://mvnrepository.com/

1:Maven pom.xml相关配置

<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.li.maven</groupId>
<artifactId>mavenWeb</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>mavenWeb Maven Webapp</name>
<url>http://maven.apache.org</url>
<properties>
<spring.version>4.3.8.RELEASE</spring.version>
<mybatis.version>3.4.0</mybatis.version>

</properties>
<dependencies>

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

<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.30</version>
</dependency>

<dependency>
<groupId>javax.servlet</groupId>
<artifactId>javax.servlet-api</artifactId>
<version>4.0.0-b05</version>
<scope>provided</scope>
</dependency>

<dependency>
<groupId>javax</groupId>
<artifactId>javaee-api</artifactId>
<version>7.0</version>
</dependency>

<dependency>
<groupId>jstl</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>

<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.0</version>
</dependency>


<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.42</version>
</dependency>

<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis-spring</artifactId>
<version>1.3.0</version>
</dependency>

<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context-support</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-aop</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-oxm</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-beans</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>4.3.7.RELEASE</version>
</dependency>

<dependency>
<groupId>org.aspectj</groupId>
<artifactId>aspectjweaver</artifactId>
<version>1.8.10</version>
</dependency>

<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.16</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.6</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.25</version>
</dependency>

<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.25</version>
</dependency>


<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.3</version>
</dependency>

<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-dbcp2</artifactId>
<version>2.1.1</version>
</dependency>

<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>2.4</version>
</dependency>
<dependency>
<groupId>commons-codec</groupId>
<artifactId>commons-codec</artifactId>
<version>1.10</version>
</dependency>

</dependencies>
<build>
<finalName>mavenWeb</finalName>

<plugins>
<plugin>

<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>8.1.16.v20140903</version>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

</project>

2：创建User类：

package com.li.mybatis.model;

import javax.persistence.Entity;
import javax.persistence.Id;

@Entity
public class User {
private int id;
private String name;
private String password;
@Id
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}

}

3:使用接口编程建立接口UserMapper实现利用接口和User.xml进行数据库的操作

简单的从数据库中取出所有的记录，小伙伴们可以再增加几个方法试试

public interface UserMapper {
public List<User> getUsers();
}

4:建立UserService.java和UserServiceImpl.java

5：对应的mybatis相关User.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.li.mybatis.dao.UserMapper">
<resultMap id="UserMap" type="com.li.mybatis.model.User">
<id column="id" property="id"/>
<result column="name" property="name"/>
<result column="password" property="password"/>
</resultMap>
<select id="getUsers" resultMap="UserMap">
select * from tb_user
</select>
</mapper>

6:在src/main/resources目录下建立配置文件的信息这里需要连接数据库的信息jdbc.properties和log4j.properties

文件结构如下图：

---->jdbc.properties:

根据个人的数据库情况进行配置

----->log4j.properties:配置比较固定，实现向控制台输出日志信息

log4j.rootLogger=INFO,Console,File
log4j.appender.Console=org.apache.log4j.ConsoleAppender
log4j.appender.Console.Target=System.out
log4j.appender.Console.layout = org.apache.log4j.PatternLayout
log4j.appender.Console.layout.ConversionPattern=[%c] - %m%n
log4j.appender.File =org.apache.log4j.RollingFileAppender
log4j.appender.File.File = logs/ssm.log
log4j.appender.File.MaxFileSize = 10MB
log4j.appender.File.Threshold = ALL
log4j.appender.File.layout =org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern =[%p] [%d{yyyy-MM-ddHH\:mm\:ss}][%c]%m%n

7：开始激动人心的spring，mybais整合，建立spring-mybatis.xml配置文件配置相关信息注意扫描包的时候一定要与你建立的包名一致哦否则出现错误找不到很痛苦的

<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
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/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc.xsd">

<context:property-placeholder location="classpath:properties/jdbc.properties"/>

<context:component-scan base-package="com.li.mybatis.model"/>
<context:component-scan base-package="com.li.mybatis.dao"/>
<context:component-scan base-package="com.li.mybatis.service"/>
<context:component-scan base-package="com.li.mybatis.service.impl"/>

<tx:annotation-driven/>

<context:annotation-config/>

<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driverClassName}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
</bean>

<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>

<property name="mapperLocations" value="classpath:mapping/*.xml" />
</bean>

<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.li.mybatis.dao"/>
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
</bean>

<bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>

<aop:config>
<aop:pointcut expression="execution(* com.li.mytatis.service.impl.*.*(..))" id="serviceOption"/>
<aop:advisor advice-ref="mybatis_advisor" pointcut-ref="serviceOption"/>
</aop:config>
<tx:advice id="mybatis_advisor" transaction-manager="txManager">
<tx:attributes>
<tx:method name="get*" read-only="true"/>
<tx:method name="*"/>
</tx:attributes>
</tx:advice>
</beans>

8：在数据库中建立测试数据；

create database user;

use user;

create table tb_user(

id int(10) primary key auto_increment,

name varchar(255),

password varchar(16));

9，对SM整合的结果进行测试，编写测试类，这里的JSON.toJSONString(User)为alibaba的类库提供在pom.xml可见在SSM中测试篇可以看看Spring文档中的Test部分

出现如下的控制台输出说明其整合成功！

10:进行SpringMVC的单独配置配合web.xml进行MVC相关的设置

10.1：SpringMVC.xml

11:进行web.xml的配置：

<web-app .....>一定要写对哦，具体可以参照Spring文档中的Web.xml配置，如果没有写对的话，当你添加

<content-param></content-param>时会报错的，还有一点就是:

<content-param>

<param-name>contextConfigLocation</param-name>

<param-value>classpath:spring-mybatis.xml</param-value>

</content-param>这一句配置有必要加上哦，否则Tomcat或者jetty启动时会报错的说找不到/WEB-INF/classess/applicationContext.xml，因为如果不加上面那句话的话，服务器启动的时候默认去applicationContext.xml中去找，由于没有配置applicationContext.xml所以会报错，这也是网上的大神总结的经验吧，在此强调一下子！

<?xml version="1.0" encoding="UTF-8"?>
<web-app
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>Archetype Created Web Application</display-name>

<filter>
<filter-name>characterFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>GB18030</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>


<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mybatis.xml</param-value>
</context-param>

<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:springMVC.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>springMVC</servlet-name>
<url-pattern>/</url-pattern>
</servlet-mapping>

<welcome-file-list>
<welcome-file>/index.jsp</welcome-file>
</welcome-file-list>
</web-app>

12：创建UserController.java

13:前台页面index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<script type="text/javascript" src="jQuery/jquery-3.2.1.min.js"></script>
<title>My JSP 'userlist.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

<style type="text/css">
a{
width: 300px;
height: 100px;
border: 1px solid red;
color:black;

}
</style>
</head>

<body>
<a href="userController/getUsers">用户列表</a>
<script type="text/javascript">
$("a").mouseenter(function(){
$(this).css('border','1px solid violet');
})
</script>
</body>
</html>

14:创建userlist.jsp，显示用户信息

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'userlist.jsp' starting page</title>
<script type="text/javascript" src="jQuery/jquery-3.2.1.min.js"></script>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">

<style type="text/css">
p{
color:red;
}
span{
width:50px;
height: 30px;
color:white;
}
</style>
</head>

<body>
<p>${users}</p>

<c:forEach items="${users}" var="u" varStatus="stu">
<c:if test="${stu.index % 2 eq 0}">
<div class="even">
<span style="background-color:blue">${u.name}</span>-->
<span style="background-color:blue">${u.password}</span>
</div>
</c:if>
<c:if test="${stu.index % 2 eq 1}">
<div class="odd">
<span style="background-color:grey">${u.name}</span>-->
<span style="background-color:grey">${u.password}</span>
</div>
</c:if>
</c:forEach>
<script type="text/javascript">
$(".even span:first").css('color',"white");
$(".even span:last").css('color',"yellow");
</script>
</body>
</html>

最后看看登录上的界面，至此SSM框架整合完成，期间出了很多错误，自己慢慢的调试找错误，所以出错了一定不能急躁，仔细分析是哪里出的错误，还有就是多看看官方文档或者源码

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