14.SSM整合
一：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
org.springframework.web.context.ContextLoaderListener
contextConfigLocation
classpath:spring.xml
二：准备工作
①创建Maven Module
②导入依赖
war
5.3.23
org.springframework
spring-context
${spring.version}
org.springframework
spring-beans
${spring.version}
org.springframework
spring-web
${spring.version}
org.springframework
spring-webmvc
${spring.version}
org.springframework
spring-jdbc
${spring.version}
org.springframework
spring-aspects
${spring.version}
org.springframework
spring-test
${spring.version}
org.mybatis
mybatis
3.5.11
org.mybatis
mybatis-spring
2.0.6
com.alibaba
druid
1.0.9
junit
junit
4.12
test
mysql
mysql-connector-java
8.0.29
log4j
log4j
1.2.17
com.github.pagehelper
pagehelper
5.2.0
ch.qos.logback
logback-classic
1.2.3
javax.servlet
javax.servlet-api
3.1.0
provided
com.fasterxml.jackson.core
jackson-databind
2.12.1
commons-fileupload
commons-fileupload
1.3.1
org.thymeleaf
thymeleaf-spring5
3.0.12.RELEASE
三：配置web.xml
CharacterEncodingFilter
org.springframework.web.filter.CharacterEncodingFilter
encoding
UTF-8
forceEncoding
true
CharacterEncodingFilter
/*
HiddenHttpMethodFilter
org.springframework.web.filter.HiddenHttpMethodFilter
HiddenHttpMethodFilter
/*
SpringMVC
org.springframework.web.servlet.DispatcherServlet
contextConfigLocation
classpath:springmvc.xml
1
SpringMVC
/
org.springframework.web.context.ContextLoaderListener
contextConfigLocation
classpath:spring.xml
四：创建SpringMVC的配置文件并配置
五：搭建MyBatis环境
①创建属性文件jdbc.properties
jdbc.driver=com.mysql.cj.jdbc
jdbc.url=jdbc:mysql://localhost:3306/ssm?serverTimezone=UTC
jdbc.username=root
jdbc.password=abc123②创建MyBatis的核心配置文件mybatis-config.xml
③创建Mapper接口和映射文件
public interface EmployeeMapper {
}
④创建日志文件log4j.xml
六：创建Spring的配置文件并配置
七：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;
}
@Override
public String toString() {
return "Employee{" +
"empId=" + empId +
", empName='" + empName + '\'' +
", age=" + age +
", sex='" + sex + '\'' +
", email='" + email + '\'' +
'}';
}
}创建控制层组件EmployeeController
/**
* 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 list = employeeService.getAllEmployee();
//将员工信息在请求域中共享
model.addAttribute("list",list);
//跳转到employee_list.html
return "employee_list";
}
} 创建接口EmployeeService
public interface EmployeeService {
/**
* 查询所有的员工信息
* @return
*/
List getAllEmployee();
}
创建实现类EmployeeServiceImpl
@Service
@Transactional
public class EmployeeServiceImpl implements EmployeeService {
@Autowired
private EmployeeMapper employeeMapper;
@Override
public List getAllEmployee() {
return employeeMapper.getAllEmployee();
}
} 在Mapper接口中添加方法
public interface EmployeeMapper {
/**
* 查询所有的员工信息
* @return
*/
List getAllEmployee();
}
在Mapper配置文件中写我们需要操作的sql语句
②创建页面
index.html
index.html
查询所有的员工信息employee_list.html
流水号
员工姓名
年龄
性别
邮箱
操作
删除
修改
③访问测试分页功能
controller层方法：
@RequestMapping(value = "/employee/page/{pageNum}",method = RequestMethod.GET)
public String getEmployeePage(@PathVariable("pageNum") Integer pageNum,Model model) {
//获取员工的分页信息
PageInfo page = employeeService.getEmployeePage(pageNum);
//将分页数据共享到请求域中
model.addAttribute("page",page);
//跳转到employee_list.html
return "employee_list";
} service接口以及实现类
/**
* 获取员工的分页信息
* @param pageNum
* @return
*/
PageInfo getEmployeePage(Integer pageNum); @Override
public PageInfo getEmployeePage(Integer pageNum) {
//开启分页功能
PageHelper.startPage(pageNum,4);
//查询所有的员工信息
List list = employeeMapper.getAllEmployee();
//获取分页相关数据
PageInfo page = new PageInfo<>(list,5);
return page;
} 首页，index.html
index.html
查询所有的员工信息employee_list.html
员工列表
流水号
员工姓名
年龄
性别
邮箱
操作
删除
修改