SSM框架整合搭建(七)
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2022-07-02 21:46:51
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(一)SSM整合环境搭建
注:SSM整合环境搭建源码下载
项目结构及其所需Jar包:
(二)SSM框架整合步骤如下:
创建数据表
CREATE TABLE `t_customer` (
`id` int(32) NOT NULL AUTO_INCREMENT,
`username` varchar(50) DEFAULT NULL,
`jobs` varchar(50) DEFAULT NULL,
`phone` varchar(16) DEFAULT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=7 DEFAULT CHARSET=utf8;
INSERT INTO `t_customer` VALUES ('1', '张三', '学生', '183999999');
INSERT INTO `t_customer` VALUES ('2', '李四', '程序员', '183666666');
INSERT INTO `t_customer` VALUES ('3', '王五', '程序员', '183121212');
INSERT INTO `t_customer` VALUES ('6', '赵六', '演员', '183933333');
1.编写配置文件
01.配置db.properties文件
jdbc.driver=com.mysql.jdbc.Driver
jdbc.url=jdbc:mysql://localhost:3306/mybatis
jdbc.username=root
jdbc.password=root
jdbc.maxTotal=30
jdbc.maxIdle=10
jdbc.initialSize=5
02.配置applicationContext.xml文件
- 配置db.properties
- 配置数据源
- 配置事务管理器,依赖于数据源
- 开启事务注解
- 配置MyBatis工厂SqlSessionFactory
- 指定核MyBatis心配置文件位置
- 配置mapper扫描器(基于MapperScannerConfigurer的整合)
- 基于Java注解配置包扫描
<?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:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.3.xsd">
<!-- 读取db.properties -->
<context:property-placeholder location="classpath:db.properties"/>
<!-- 配置数据源 -->
<bean id="dataSource"
class="org.apache.commons.dbcp2.BasicDataSource">
<!--数据库驱动 -->
<property name="driverClassName" value="${jdbc.driver}" />
<!--连接数据库的url -->
<property name="url" value="${jdbc.url}" />
<!--连接数据库的用户名 -->
<property name="username" value="${jdbc.username}" />
<!--连接数据库的密码 -->
<property name="password" value="${jdbc.password}" />
<!--最大连接数 -->
<property name="maxTotal" value="${jdbc.maxTotal}" />
<!--最大空闲连接 -->
<property name="maxIdle" value="${jdbc.maxIdle}" />
<!--初始化连接数 -->
<property name="initialSize" value="${jdbc.initialSize}" />
</bean>
<!-- 事务管理器,依赖于数据源 -->
<bean id="transactionManager" class=
"org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource" />
</bean>
<!-- 开启事务注解 -->
<tx:annotation-driven transaction-manager="transactionManager"/>
<!-- 配置MyBatis工厂SqlSessionFactory -->
<bean id="sqlSessionFactory"
class="org.mybatis.spring.SqlSessionFactoryBean">
<!--注入数据源 -->
<property name="dataSource" ref="dataSource" />
<!--指定核MyBatis心配置文件位置 -->
<property name="configLocation" value="classpath:mybatis-config.xml" />
</bean>
<!-- 配置mapper扫描器 -->
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.wang.dao"/>
</bean>
<!-- 扫描Service -->
<context:component-scan base-package="com.wang.service" />
</beans>
03.配置mybatis-config.xml文件
- 只需配置别名即可!
<?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>
<!-- 别名定义 -->
<typeAliases>
<package name="com.wang.po" />
</typeAliases>
</configuration>
04.配置springmvc-config.xml文件
- 使用注解配置包扫描器
- 配置加载注解驱动
- 配置视图解析器
<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"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd">
<!-- 配置包扫描器,扫描@Controller注解的类 -->
<context:component-scan base-package="com.wang.controller" />
<!-- 加载注解驱动 -->
<mvc:annotation-driven />
<!-- 配置视图解析器 -->
<bean class=
"org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/jsp/" />
<property name="suffix" value=".jsp" />
</bean>
</beans>
05.配置log4j.properties文件
# Global logging configuration
log4j.rootLogger=ERROR, stdout
# MyBatis logging configuration...
log4j.logger.com.itheima=DEBUG
# Console output...
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] - %m%n
06.配置web.xml文件
- 引入Spring配置文件。比如:applicationContext.xml
- 配置字符编码过滤器解决乱码问题
- 映入Mybatis核心配置文件。比如:springmvc-config.xml
<?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">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:applicationContext.xml</param-value>
</context-param>
<listener>
<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
</listener>
<filter>
<filter-name>encoding</filter-name>
<filter-class>
org.springframework.web.filter.CharacterEncodingFilter
</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encoding</filter-name>
<url-pattern>*.action</url-pattern>
</filter-mapping>
<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-config.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>
</web-app>
2.在com.wang.po创建Customer持久化类
package com.wang.po;
public class Customer {
private int id;
private String username;
private String jobs;
private String phone;
---省略setter和getter方法---
}
3.在com.wang.dao包下创建CustomerDao接口和CustomerDao.xml
01.CustomerDao.java(基于MapperScannerConfigurer的整合)
- CustomerDao接口+CustomerDao.xml=JDBC中操作数据库的CustomerDao.Java
- CustomerDao接口必须与CustomerDao.xml在一个包下
- 接口名必须和映射文件名称一致。
- CustomerDao接口方法查询参数必须与映射文件中的parameterType定义的数据类型一致。
- CustomerDao接口方法返回值必须与映射文件中sql返回值一致。
package com.wang.dao;
import com.wang.po.Customer;
/**
* Customer接口文件
*/
public interface CustomerDao {
/**
* 根据id查询客户信息
*/
public Customer findCustomerById(Integer id);
}
02.CustomerDao.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.wang.dao.CustomerDao">
<select id="findCustomerById" parameterType="Integer"
resultType="customer">
select*from t_customer where id=#{id}
</select>
</mapper>
4.在com.wang.service包下创建CustomerService.java接口和CustomerServiceImp.java
CustomerService.java接口
package com.wang.service;
import com.wang.po.Customer;
public interface CustomerService {
public Customer findCustomerById(Integer id);
}
01. CustomerServiceImp.java
package com.wang.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import com.wang.dao.CustomerDao;
import com.wang.po.Customer;
@Service
//@Transactional实现添加、删除、修改时才使用@Transactional
public class CustomerServiceImp implements CustomerService {
@Autowired
private CustomerDao customerDao;
@Override
public Customer findCustomerById(Integer id) {
return this.customerDao.findCustomerById(id);
}
}
5.在com.wang.controller包下创建CustomerController.java
02.CustomerController.java
package com.wang.controller;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import com.wang.po.Customer;
import com.wang.service.CustomerService;
@Controller
public class CustomerController {
@Autowired
private CustomerService customerservice;
@RequestMapping("/findCustomerById")
//@RequestMapping("/findCustomer")此路径无法请求
public String findCustomerById(Integer id, Model model) {
Customer customer = customerservice.findCustomerById(id);
model.addAttribute("customer", customer);
return "customer";
}
}
6.在jsp文件夹下创建customer.jsp
<%@ 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">
<title>客户信息</title>
</head>
<body>
<table border=1 >
<tr>
<th style="width:100px;">编号</th>
<th style="width:100px;">名称</th>
<th style="width:100px;">职业</th>
<th style="width:100px;">电话</th>
</tr>
<tr>
<td >${customer.id}</td>
<td>${customer.username}</td>
<td>${customer.jobs}</td>
<td>${customer.phone}</td>
</tr>
</table>
</body>
</html>
7.结果演示
浏览器输入:http://localhost:8081/SSMProject/findCustomerById?id=1