SSM整合《学习笔记》
SSM整合
1、ContextLoaderListener
Spring提供了监听器ContextLoaderListener，实现ServletContextListener接口，可监听
ServletContext的状态，在web服务器的启动，读取Spring的配置文件，创建Spring的IOC容器。web应用中必须在web.xml中配置
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:spring.xmlparam-value>
context-param>
2、准备工作
①创建Maven Module
②导入依赖
这里引入spring-jdbc不是因为我们持久层框架用jdbc，而是因为我们的事务管理的类DatasorseTransactionMannege在这个包下。
<packaging>warpackaging>
<properties>
<spring.version>5.3.1spring.version>
properties>
<dependencies>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-contextartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-beansartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-webmvcartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-jdbcartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-aspectsartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.springframeworkgroupId>
<artifactId>spring-testartifactId>
<version>${spring.version}version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatisartifactId>
<version>3.5.7version>
dependency>
<dependency>
<groupId>org.mybatisgroupId>
<artifactId>mybatis-springartifactId>
<version>2.0.6version>
dependency>
<dependency>
<groupId>com.alibabagroupId>
<artifactId>druidartifactId>
<version>1.0.9version>
dependency>
<dependency>
<groupId>junitgroupId>
<artifactId>junitartifactId>
<version>4.12version>
<scope>testscope>
dependency>
<dependency>
<groupId>mysqlgroupId>
<artifactId>mysql-connector-javaartifactId>
<version>8.0.16version>
dependency>
<dependency>
<groupId>log4jgroupId>
<artifactId>log4jartifactId>
<version>1.2.17version>
dependency>
<dependency>
<groupId>com.github.pagehelpergroupId>
<artifactId>pagehelperartifactId>
<version>5.2.0version>
dependency>
<dependency>
<groupId>ch.qos.logbackgroupId>
<artifactId>logback-classicartifactId>
<version>1.2.3version>
dependency>
<dependency>
<groupId>javax.servletgroupId>
<artifactId>javax.servlet-apiartifactId>
<version>3.1.0version>
<scope>providedscope>
dependency>
<dependency>
<groupId>com.fasterxml.jackson.coregroupId>
<artifactId>jackson-databindartifactId>
<version>2.12.1version>
dependency>
<dependency>
<groupId>commons-fileuploadgroupId>
<artifactId>commons-fileuploadartifactId>
<version>1.3.1version>
dependency>
<dependency>
<groupId>org.thymeleafgroupId>
<artifactId>thymeleaf-spring5artifactId>
<version>3.0.12.RELEASEversion>
dependency>
dependencies>
③创建表
CREATE TABLE `t_emp` (
`emp_id` int(11) NOT NULL AUTO_INCREMENT,
`emp_name` varchar(20) DEFAULT NULL,
`age` int(11) DEFAULT NULL,
`sex` char(1) DEFAULT NULL,
`email` varchar(50) DEFAULT NULL,
PRIMARY KEY (`emp_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
3、配置web.xml
<filter>
<filter-name>CharacterEncodingFilterfilter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilterfilter-class>
<init-param>
<param-name>encodingparam-name>
<param-value>UTF-8param-value>
init-param>
<init-param>
<param-name>forceEncodingparam-name>
<param-value>trueparam-value>
init-param>
filter>
<filter-mapping>
<filter-name>CharacterEncodingFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<filter>
<filter-name>HiddenHttpMethodFilterfilter-name>
<filter-class>org.springframework.web.filter.HiddenHttpMethodFilterfilterclass>
filter>
<filter-mapping>
<filter-name>HiddenHttpMethodFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<servlet>
<servlet-name>DispatcherServletservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservletclass>
<init-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:SpringMVC.xmlparam-value>
init-param>
<load-on-startup>1load-on-startup>
servlet>
<servlet-mapping>
<servlet-name>DispatcherServletservlet-name>
<url-pattern>/url-pattern>
servlet-mapping>
<context-param>
<param-name>contextConfigLocationparam-name>
<param-value>classpath:Spring.xmlparam-value>
context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListenerlistener-class>
listener>
4、创建SpringMVC的配置文件并配置
<context:component-scan base-package="com.atguigu.ssm.controller">
context:component-scan>
<bean id="viewResolver"
class="org.thymeleaf.spring5.view.ThymeleafViewResolver">
<property name="order" value="1"/>
<property name="characterEncoding" value="UTF-8"/>
<property name="templateEngine">
<bean class="org.thymeleaf.spring5.SpringTemplateEngine">
<property name="templateResolver">
<bean
class="org.thymeleaf.spring5.templateresolver.SpringResourceTemplateResolver">
<property name="prefix" value="/WEB-INF/templates/"/>
<property name="suffix" value=".html"/>
<property name="templateMode" value="HTML5"/>
<property name="characterEncoding" value="UTF-8" />
bean>
property>
bean>
property>
bean>
<mvc:view-controller path="/" view-name="index">mvc:view-controller>
<mvc:default-servlet-handler />
<mvc:annotation-driven />
5、搭建MyBatis环境
①创建属性文件jdbc.properties
jdbc.user=root
jdbc.password=atguigu
jdbc.url=jdbc:mysql://localhost:3306/ssm?serverTimezone=UTC
jdbc.driver=com.mysql.cj.jdbc.Driver
②创建MyBatis的核心配置文件mybatis-config.xml
DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
<settings>
<setting name="mapUnderscoreToCamelCase" value="true"/>
settings>
<plugins>
<plugin interceptor="com.github.pagehelper.PageInterceptor">plugin>
plugins>
configuration>
③创建Mapper接口和映射文件
public interface EmployeeMapper {
List<Employee> getEmployeeList();
}
DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.atguigu.ssm.mapper.EmployeeMapper">
<select id="getEmployeeList" resultType="Employee">
select * from t_emp
select>
mapper>
④创建日志文件log4j.xml
DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
<param name="Encoding" value="UTF-8" />
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="%-5p %d{MM-dd HH:mm:ss,SSS} %m (%F:%L) \n" />
layout>
appender>
<logger name="java.sql">
<level value="debug" />
logger>
<logger name="org.apache.ibatis">
<level value="info" />
logger>
<root>
<level value="debug" />
<appender-ref ref="STDOUT" />
root>
log4j:configuration>
6、创建Spring的配置文件并配置
<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
https://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="com.atguigu.ssm">
<context:exclude-filter type="annotation"expression="org.springframework.stereotype.Controller"/>
context:component-scan>
<context:property-placeholder location="classpath:jdbc.properties">
context:property-placeholder>
<bean id="dataSource" class="com.alibaba.druid.pool.DruidDataSource">
<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>
<bean class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="configLocation" value="classpath:mybatis-config.xml">
property>
<property name="dataSource" ref="dataSource">property>
<property name="typeAliasesPackage" value="com.atguigu.ssm.pojo">
property>
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.atguigu.ssm.mapper">property>
bean>
beans>
7、测试功能
①创建组件
实体类Employee
public class Employee {
private Integer empId;
private String empName;
private Integer age;
private String sex;
private String email;
public Employee() {
}
public Employee(Integer empId, String empName, Integer age, String sex,
String email) {
this.empId = empId;
this.empName = empName;
this.age = age;
this.sex = sex;
this.email = email;
}
public Integer getEmpId() {
return empId;
}
public void setEmpId(Integer empId) {
this.empId = empId;
}
public String getEmpName() {
return empName;
}
public void setEmpName(String empName) {
this.empName = empName;
}
public Integer getAge() {
return age;
}
public void setAge(Integer age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
}
创建控制层组件EmployeeController
@Controller
public class EmployeeController {
@Autowired
private EmployeeService employeeService;
@RequestMapping(value = "/employee/page/{pageNum}", method = RequestMethod.GET)
public String getEmployeeList(Model model, @PathVariable("pageNum") Integer pageNum){
PageInfo<Employee> page = employeeService.getEmployeeList(pageNum);
model.addAttribute("page", page);
return "employee_list";
}
}
创建接口EmployeeService
public interface EmployeeService {
PageInfo<Employee> getEmployeeList(Integer pageNum);
}
创建实现类EmployeeServiceImpl
@Service
public class EmployeeServiceImpl implements EmployeeService {
@Autowired
private EmployeeMapper employeeMapper;
@Override
public PageInfo<Employee> getEmployeeList(Integer pageNum) {
PageHelper.startPage(pageNum, 4);
List<Employee> list = employeeMapper.getEmployeeList();
PageInfo<Employee> page = new PageInfo<>(list, 5);
return page;
}
}
②创建页面
DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Employee Infotitle>
<link rel="stylesheet" th:href="@{/static/css/index_work.css}">
head>
<body>
<table>
<tr>
<th colspan="6">Employee Infoth>
tr>
<tr>
<th>emp_idth>
<th>emp_nameth>
<th>ageth>
<th>sexth>
<th>emailth>
<th>optionsth>
tr>
<tr th:each="employee : ${page.list}">
<td th:text="${employee.empId}">td>
<td th:text="${employee.empName}">td>
<td th:text="${employee.age}">td>
<td th:text="${employee.sex}">td>
<td th:text="${employee.email}">td>
<td>
<a href="">deletea>
<a href="">updatea>
td>
tr>
<tr>
<td colspan="6">
<span th:if="${page.hasPreviousPage}">
<a th:href="@{/employee/page/1}">首页a>
<a th:href="@{'/employee/page/'+${page.prePage}}">上一页a>
span>
<span th:each="num : ${page.navigatepageNums}">
<a th:if="${page.pageNum==num}"
th:href="@{'/employee/page/'+${num}}" th:text="'['+${num}+']'" style="color:red;">a>
<a th:if="${page.pageNum!=num}"
th:href="@{'/employee/page/'+${num}}" th:text="${num} ">a>
span>
<span th:if="${page.hasNextPage}">
<a th:href="@{'/employee/page/'+${page.nextPage}}">下一页a>
<a th:href="@{'/employee/page/'+${page.pages}}">末页a>
span>
td>
tr>
table>
body>
html>
③访问测试分页功能
localhost:8080/employee/page/1