SSM整合
SSM整合
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>
准备工作
-
创建Maven Module
-
导入依赖
<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/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0modelVersion>
<groupId>com.bijinggroupId>
<artifactId>ssmartifactId>
<version>1.0-SNAPSHOTversion>
<packaging>warpackaging>
<properties>
<maven.compiler.source>11maven.compiler.source>
<maven.compiler.target>11maven.compiler.target>
<java.version>11java.version>
<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>
project>
- 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
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.HiddenHttpMethodFilterfilter-class>
filter>
<filter-mapping>
<filter-name>HiddenHttpMethodFilterfilter-name>
<url-pattern>/*url-pattern>
filter-mapping>
<servlet>
<servlet-name>DispatcherServletservlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServletservlet-class>
<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>
创建SpringMVC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"
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 https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
<context:component-scan base-package="com.bijing.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:default-servlet-handler/>
<mvc:annotation-driven/>
<mvc:view-controller path="/" view-name="index"/>
<bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">bean>
beans>
搭建MyBatis环境
- 创建属性文件jdbc.properties
jdbc.user=root
jdbc.password=root1234
jdbc.url=jdbc:mysql://localhost:3306/ssm?serverTimezone=UTC
jdbc.driver=com.mysql.cj.jdbc.Driver
- 创建MyBatis的核心配置文件mybatis-config.xml
基本都可以在spring.xml中配置
DOCTYPE configuration
PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
"https://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
configuration>
- 创建Mapper接口和映射文件
EmployeeMapper.xml
public interface EmployeeMapper {
List<Employee> getEmployeeList();
}
DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"https://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.bijing.mapper.EmployeeMapper">
<resultMap id="empResultMap" type="Employee">
<id column="emp_id" property="empId">id>
<result column="emp_name" property="empName">result>
<result column="age" property="age">result>
<result column="gender" property="gender">result>
resultMap>
<select id="getAllEmployee" resultMap="empResultMap">
SELECT *
FROM t_emp
select>
mapper>
- 创建日志文件log4j.xml
DOCTYPE log4j:configuration SYSTEM
"http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/xml/doc-files/log4j.dtd">
<log4j:configuration debug="true">
<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>
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" xmlns:tx="http://www.springframework.org/schema/tx"
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 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd">
<context:component-scan base-package="com.bijing">
<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 id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource">property>
bean>
<tx:annotation-driven transaction-manager="transactionManager">tx:annotation-driven>
<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.bijing.pojo">property>
<property name="configurationProperties">
<props>
<prop key="mapUnderscoreToCamelCase">trueprop>
props>
property>
<property name="plugins">
<array>
<bean class="com.github.pagehelper.PageInterceptor">bean>
array>
property>
bean>
<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="basePackage" value="com.bijing.mapper">property>
bean>
beans>
测试功能
- 创建组件
实体类Employee
public class Employee {
private Integer empId;
private String empName;
private Integer age;
private String gender;
private String email;
public Employee(Integer empId, String empName, Integer age, String gender, String email) {
this.empId = empId;
this.empName = empName;
this.age = age;
this.gender = gender;
this.email = email;
}
public Employee() {
}
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 getGender() {
return gender;
}
public void setGender(String gender) {
this.gender = gender;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
@Override
public String toString() {
return "Employee{" +
"empId=" + empId +
", empName='" + empName + '\'' +
", age=" + age +
", gender='" + gender + '\'' +
", email='" + email + '\'' +
'}';
}
}
创建控制层组件EmployeeController
/**
* @author 毕晶
* @date 2023/2/11 17:39
* 查询所有的员工信息-->/employee-->get
* 根据id查询员工信息-->/employee/1-->get
* 跳转到添加页面-->/to/add-->get
* 添加员工信息-->/employee-->post
* 修改员工信息-->/employee-->put
* 删除员工信息-->/employee/1-->delete
*/
@Controller
public class EmployeeController {
@Autowired
private EmployeeService employeeService;
@RequestMapping(value = "/employee", method = RequestMethod.GET)
public String getAllEmployee(Model model) {
// 查询所有的员工信息
List<Employee> list = employeeService.getAllEmployee();
list.forEach(System.out::println);
// 将员工信息在请求域中共享
model.addAttribute("list", list);
// 跳转到employee_list.html页面
return "employee_list";
}
@RequestMapping(value = "/employee/page/{pageNum}", method = RequestMethod.GET)
public String getEmployeeByPage(@PathVariable("pageNum") Integer pageNum, Model model) {
// 获取员工分页信息
PageInfo<Employee> page = employeeService.getEmployeeByPage(pageNum);
// 将分页数据共享到请求域
model.addAttribute("page", page);
return "employee_list";
}
}
创建接口EmployeeService
public interface EmployeeService {
/**
* 查询所有的员工信息
*
* @return
*/
List<Employee> getAllEmployee();
/**
* 获取员工分页信息
*
* @param pageNum
* @return
*/
PageInfo<Employee> getEmployeeByPage(Integer pageNum);
}
创建实现类EmployeeServiceImpl
@Service
@Transactional
public class EmployeeServiceImpl implements EmployeeService {
@Autowired
private EmployeeMapper employeeMapper;
@Override
public List<Employee> getAllEmployee() {
return employeeMapper.getAllEmployee();
}
@Override
public PageInfo<Employee> getEmployeeByPage(Integer pageNum) {
// 开启分页功能
PageHelper.startPage(pageNum, 4);
// 查询所有员工信息
List<Employee> list = employeeMapper.getAllEmployee();
// 获取分页相关数据
return new PageInfo<>(list, 5);
}
}
- 创建页面
<div>
<table>
<tr>
<th colspan="6">员工列表th>
tr>
<tr>
<th>流水号th>
<th>员工姓名th>
<th>年龄th>
<th>性别th>
<th>邮箱th>
<th>options(<a th:href="@{/to/add}">adda>)th>
tr>
<tr th:each="employee,status:${page.list}">
<td th:text="${status.count}">td>
<td th:text="${employee.empName}">td>
<td th:text="${employee.age}">td>
<td th:text="${employee.gender}">td>
<td th:text="${employee.email}">td>
<td>
<a>删除a>
<a>修改a>
td>
tr>
table>
<div style="text-align: center">
<a th:if="${page.hasPreviousPage}" th:href="@{/employee/page/1}">首页a>
<a th:if="${page.hasPreviousPage}" th:href="@{'/employee/page/'+${page.prePage}}">上一页a>
<span th:each="num:${page.navigatepageNums}">
<a th:href="@{'/employee/page/'+${num}}" th:text="${num}">a>
span>
<a th:if="${page.hasNextPage}" th:href="@{'/employee/page/'+${page.nextPage}}">下一页a>
<a th:if="${page.hasNextPage}" th:href="@{'/employee/page/'+${page.pages}}">末页a>
div>
div>
- 访问测试分页功能
localhost:8080/employee/page/1