SSM框架的搭建

Posted 2020-10-21 眼泪，还是流了

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篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了SSM框架的搭建相关的知识，希望对你有一定的参考价值。

如何搭建SSM(SpringMvc+mybatis+Spring)java web工程

No.1 首先将web工程结构建好

1.1.1 开发环境介绍

在这里我是采用的是mysql数据库

编译器版本采用的是jdk使用的是1.8

开发工具是使用的是eclipse Mars版本

web容器采用的是tomcat 版本是7.0版本

在这里我将我自己写好的Demo工程目录结构截图展示出来方便大家新建项目

技术分享图片

这张图图片清晰地将我的工程清晰地展示出来，先简单介绍下吧，项目主包是以com.cntv开始的。在之下又分为好几个子包，分别是mapper、controller、service、dao、mapper、logs、config、base、entity、test包，其中controller包是负责接收前台请求执行部分业务逻辑的action，熟悉struts框架的应该知道Action哈在这里我就不详细说了。mapper包主要是负责mybatis框架实体映射，config包是主要存储项目配置文件。其他的包就不一一介绍了，都是些常规的包。

NO.2 准备好相应的jar包

这里我是采用Spring是.2.0版本 mybatis是3.3.0版本的

图中框选的jar包是一些依赖性jar包不要以为这就是完整的jar包还有呢....

到此为止 jar包已准备完毕现在就来开始准备框架的相关的配置了首先是Spring+mybatis关联的配置

NO.3 配置框架相关功能的配置文件

在src目录中config文件夹中新建spring-mybatis.xml文件，通过这个文件集成并关联Spring+mybatis框架

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<?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:p="http://www.springframework.org/schema/p"
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-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<context:component-scan base-package="com.cntv" />
<bean id="propertyConfigurer"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location" value="classpath:jdbc.properties" />
</bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"
destroy-method="close">
<property name="driverClassName" value="${driver}" />
<property name="url" value="${url}" />
<property name="username" value="${username}" />
<property name="password" value="${password}" />
<property name="initialSize" value="${initialSize}"></property>
<property name="maxActive" value="${maxActive}"></property>
<property name="maxIdle" value="${maxIdle}"></property>
<property name="minIdle" value="${minIdle}"></property>
<property name="maxWait" value="${maxWait}"></property>
</bean>
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="mapperLocations" value="classpath:com/cntv/mapper/*.xml"></property>
</bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.cn.hnust.dao" />
<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"></property>
</bean>
<bean id="transactionManager"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
</beans>

紧接着在src下config包下新建jdbc.properties文化把数据库的配置放在这个配置文件里面

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driver=com.mysql.jdbc.Driver
url=jdbc:mysql://125.221.225.113:3306/db_zsl
username=demao
password=demao
#定义初始连接数
initialSize=0
#定义最大连接数
maxActive=20
#定义最大空闲
maxIdle=20
#定义最小空闲
minIdle=1
#定义最长等待时间
maxWait=60000

说明:第一行是加载jdbc驱动地址

第二行是连接数据库加红色字体是数据库名字前面是Ip地址+mysql数据库端口号

userName是数据库连接用户名

password是连接数据库密码

接下来配置SpringMvc相关的配置

还是跟之前一样，在src目录下的config文件夹中新建spring-mvc.xml配置文件

这个文件主要是负责Mvc架构视图，前后台数据交互等。

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<?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:p="http://www.springframework.org/schema/p"
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-3.1.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
<context:component-scan base-package="com.cntv.controller" />
<bean id="mappingJacksonHttpMessageConverter"
class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
<property name="supportedMediaTypes">
<list>
<value>text/html;charset=UTF-8</value>
</list>
</property>
</bean>
<bean
class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
<property name="messageConverters">
<list>
<ref bean="mappingJacksonHttpMessageConverter" ></ref>
</list>
</property>
</bean>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/" />
<property name="suffix" value=".jsp" />
</bean>
<!-- <bean id="multipartResolver"
class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
默认编码
<property name="defaultEncoding" value="utf-8" />
文件大小最大值
<property name="maxUploadSize" value="10485760000" />
内存中的最大值
<property name="maxInMemorySize" value="40960" />
</bean> -->
</beans>

最后配置web.xml文件

项目总配置文件将spring-mybatis.xml和spring-mvc.xml集成到web.xml里面

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<?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"
version="3.0">
<display-name>Archetype Created Web Application</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mybatis.xml</param-value>
</context-param>
<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>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
</listener>
<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:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
</servlet>
<servlet-mapping>
<servlet-name>SpringMVC</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>/index.jsp</welcome-file>
</welcome-file-list>
<session-config>
<session-timeout>15</session-timeout>
</session-config>
</web-app>

NO.4 收官完成测试框架能否正常运行

直到这里我们已经把框架配置好了现在我们就要写一些实在的东西了把接口和service定一下

4.1.1 定义一个接口

在dao包下新建IUserDao.java类

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package com.cntv.dao;
import org.springframework.stereotype.Repository;
import com.cntv.entity.User;
@Repository
public interface IUserDao {
int deleteByPrimaryKey(Integer id);
int insert(User record);
int insertSelective(User record);
User selectByPrimaryKey(Integer id);
int updateByPrimaryKeySelective(User record);
int updateByPrimaryKey(User record);
}

4.1.2 定义一个service接口

同样的在service包下新建IUserService.java类

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package com.cntv.service;
import com.cntv.entity.User;
public interface IUserService {
public User getUserById(int userId);
}

4.1.3定义一个javaBean

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package com.cntv.entity;
public class User {
private Integer id;
private String userName;
private String password;
private Integer age;
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 == null ? null : userName.trim();
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password == null ? null : password.trim();
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
}

4.1.4 定义一个mapper.xml实体映射

很简单，在mapper文件夹下新建UserMapper.xml配置文件

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<?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.cntv.dao.IUserDao" >
<resultMap id="BaseResultMap" type="com.cntv.entity.User" >
<id column="id" property="id" jdbcType="INTEGER" />
<result column="user_name" property="userName" jdbcType="VARCHAR" />
<result column="password" property="password" jdbcType="VARCHAR" />
<result column="age" property="age" jdbcType="INTEGER" />
</resultMap>
<sql id="Base_Column_List" >
id, user_name, password, age
</sql>
<select id="selectByPrimaryKey" resultMap="BaseResultMap" parameterType="java.lang.Integer" >
select
<include refid="Base_Column_List" />
from user_t
where id = #{id,jdbcType=INTEGER}
</select>
<delete id="deleteByPrimaryKey" parameterType="java.lang.Integer" >
delete from user_t
where id = #{id,jdbcType=INTEGER}
</delete>
<insert id="insert" parameterType="com.cntv.entity.User" >
insert into user_t (id, user_name, password,
age)
values (#{id,jdbcType=INTEGER}, #{userName,jdbcType=VARCHAR}, #{password,jdbcType=VARCHAR},
#{age,jdbcType=INTEGER})
</insert>
<insert id="insertSelective" parameterType="com.cntv.entity.User" >
insert into user_t
<trim prefix="(" suffix=")" suffixOverrides="," >
<if test="id != null" >
id,
</if>
<if test="userName != null" >
user_name,
</if>
<if test="password != null" >
password,
</if>
<if test="age != null" >
age,
</if>
</trim>
<trim prefix="values (" suffix=")" suffixOverrides="," >
<if test="id != null" >
#{id,jdbcType=INTEGER},
</if>
<if test="userName != null" >
#{userName,jdbcType=VARCHAR},
</if>
<if test="password != null" >
#{password,jdbcType=VARCHAR},
</if>
<if test="age != null" >
#{age,jdbcType=INTEGER},
</if>
</trim>
</insert>
<update id="updateByPrimaryKeySelective" parameterType="com.cntv.entity.User" >
update user_t
<set >
<if test="userName != null" >
user_name = #{userName,jdbcType=VARCHAR},
</if>
<if test="password != null" >
password = #{password,jdbcType=VARCHAR},
</if>
<if test="age != null" >
age = #{age,jdbcType=INTEGER},
</if>
</set>
where id = #{id,jdbcType=INTEGER}
</update>
<update id="updateByPrimaryKey" parameterType="com.cntv.entity.User" >
update user_t
set user_name = #{userName,jdbcType=VARCHAR},
password = #{password,jdbcType=VARCHAR},
age = #{age,jdbcType=INTEGER}
where id = #{id,jdbcType=INTEGER}
</update>
</mapper>

这个文件就包含CRUD操作 sql语句在标签中都有定义，需要注意的是这里面sql语句用到的一些参数全部是从dao层获取的

mapper文件是映射数据库表对应的javaBean实体 mapper中可以写sql语句很方便。

4.1.5 定义一个service实现类

在service包下serviceImpl包下新建UserServiceImpl类

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package com.cntv.service.serviceImpl;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletResponse;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Service;
import com.cntv.dao.IUserDao;
import com.cntv.entity.User;
import com.cntv.service.IUserService;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
@Service
public class UserServiceImpl implements IUserService {
@Resource
private IUserDao userDao;
@Override
public User getUserById(int userId) {
// TODO Auto-generated method stub
return this.userDao.selectByPrimaryKey(userId);
}
public static void main(String[] args) {
ApplicationContext ca= new ClassPathXmlApplicationContext("spring-mybatis.xml");
UserServiceImpl u=(UserServiceImpl) ca.getBean("userServiceImpl");
User ue= u.getUserById(12);
System.out.println("用户名:"+ue.getUserName());
System.out.println("用户密码:"+ue.getPassword());
}
public IUserDao getUserDao() {
return userDao;
}
public void setUserDao(IUserDao userDao) {
this.userDao = userDao;
}
}

4.1.6 定义一个controller

在src目录下的controller包下新建一个controller，在这里我新建的是UserController.java

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package com.cntv.controller;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.coyote.Request;
import org.springframework.http.HttpRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.ModelAndView;
import com.cntv.entity.User;
import com.cntv.service.serviceImpl.UserServiceImpl;
@Controller
public class UserController {
@Resource
private UserServiceImpl userService;
@RequestMapping("test.do")
public ModelAndView testCon(HttpServletRequest request,Model model){
System.out.println("hello");
System.out.println(request.getParameter("id"));
User u=userService.getUserById(new Integer(request.getParameter("id")));
System.out.println(u.getUserName());
ModelAndView mod=new ModelAndView();
mod.setViewName("success");
return mod;
}
/**
* @deprecated
* 根据前台封装的javaBean属性进行封装这里是进行User对象的封装
* 测试后台是否能正常能拿到数据
* @param user 获取前台穿过来的对象
* @param request
* @return
*/
@RequestMapping("submit.do")
public String testBean(User user,HttpServletRequest request){
System.out.println("========+"+user.getUserName()+"..."+user.getPassword());
return "success";
}
public UserServiceImpl getUserService() {
return userService;
}
public void setUserService(UserServiceImpl userService) {
this.userService = userService;
}
}

Ok！！！现在就来测试下吧后台数据库和service层到底能不能打通吧

技术分享图片

再来对照下数据库中数据吧！！

技术分享图片

经过测试持久层和业务层是能互通的测试通过！！！！

啦啦啦! 现在测试前后台数据能不能互通了 ....

前端新建一个jsp测试页面测试请求和数据能不能到达后台controller里面

在这里我新建的是eg.jsp

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<%@ page language="java" contentType="text/html; charset=utf-8"
pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type="text/javascript" src="js/jquery-1.7.js"></script>
<title>Insert title here</title>
</head>
<body>
<input id="inp" type="hidden" maxlength="20">
<h2>Test formMait</h2>
<form action="submit.do" method="post" >
账户<input type="text" name="userName">
密码<input type="text" name="password">
<button>提交</button>
</form>
<script type="text/javascript">
$(function(){
// alert("json hello");
})
function clicBt(){
console.log("hello friends!!!")
$.ajax({
type: "POST",
url: "test.do?id="+$("#inp").val(),
data: "name=John&location=Boston",
success: function(msg){
alert("china is hello and you are okau!");
}
});
}
</script>
</body>
</html>