Spring+SpringMVC+Mybatis配置記錄

 

1.在eclipse中配置好“新建動態WEB”，準備好SPRINGMVC/Mybatis相關Jar。

主要代碼：

web.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_4_0.xsd" id="WebApp_ID" version="4.0">
  <display-name>springmvcmybatis</display-name>
  <servlet>
		<servlet-name>springmvcmybatis</servlet-name>
		<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
		<load-on-startup>1</load-on-startup>
	</servlet>
	<servlet-mapping>
		<servlet-name>springmvcmybatis</servlet-name>
		<url-pattern>/</url-pattern>
	</servlet-mapping>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath:springmvcmybatis-config.xml</param-value>
	</context-param> 
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
</web-app>

springmvcmybatis-servlet.xml

<?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:context="http://www.springframework.org/schema/context"
    xmlns:mvc="http://www.springframework.org/schema/mvc"
    xsi:schemaLocation="http://www.springframework.org/schema/mvc 
    http://www.springframework.org/schema/mvc/spring-mvc.xsd
    http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context.xsd">
	<context:component-scan base-package="com.springmvcmybatis.controller"></context:component-scan>
	<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
		<property name="prefix" value="/WEB-INF/jsp/" />
		<property name="suffix" value=".jsp" />
	</bean> 
</beans>

springmvcmybatis-config.xml

<?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">
	 <context:component-scan base-package="com.springmvcmybatis.po"></context:component-scan>
	<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
		<property name="driverClassName"
			value="com.mysql.cj.jdbc.Driver" />
	 <property name="url"
			value="jdbc:mysql://localhost:3306/javadb?serverTimezone=UTC&amp;useSSL=false&amp;allowPublicKeyRetrieval=true" />
		<property name="username" value="root" />
		<property name="password" value="xxxxxxxxxxx" /> 
		 
	</bean>
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource" />
	</bean>
	<tx:annotation-driven
		transaction-manager="transactionManager" />
	<bean id="sqlSessionFactory"
		class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="configLocation"
			value="classpath:mybatis-config.xml" />
	</bean>
	<bean id="customerMapper"
		class="org.mybatis.spring.mapper.MapperFactoryBean">
		<property name="mapperInterface"
			value="com.springmvcmybatis.mapper.CustomerMapper"></property>
		<property name="sqlSessionFactory" ref="sqlSessionFactory" />
	</bean> 
	<bean name="/home" class="com.springmvcmybatis.controller.HomeController"></bean>
</beans>

mybatis-config.xml

<?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>
    <!--配置別名 -->
    <typeAliases>
        <package name="com.springmvcmybatis.po" />
    </typeAliases>
    <!--配置Mapper的位置 -->
	<mappers> 
   <!--     <mapper resource="com/springmvcmybatis/po/CustomerMapper.xml" />
       -->
	  <mapper resource="com/springmvcmybatis/mapper/CustomerMapper.xml" /> 
       
	</mappers>
</configuration>

 com.springmvcmybatis.mapper/CustomerMapper.java

package com.springmvcmybatis.mapper;

import com.springmvcmybatis.po.Customer;

public interface CustomerMapper {
 
Customer findCustomerById(int id);
} 

 com.springmvcmybatis.mapper/CustomerMapper.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.springmvcmybatis.mapper.CustomerMapper">
	<!--根據id查詢客戶信息 -->
	<select id="findCustomerById" parameterType="Integer"
		     resultType="customer">
		select * from t_customer where id = #{id}
	</select>
</mapper>

CUSTOMER.java

package com.springmvcmybatis.po;
/**
 *  
 */
public class Customer {
	private Integer id;        
	private String username;  
	private String jobs;      
	private String phone;     
	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;
	}
	public String getJobs() {
		return jobs;
	}
	public void setJobs(String jobs) {
		this.jobs = jobs;
	}
	public String getPhone() {
		return phone;
	}
	public void setPhone(String phone) {
		this.phone = phone;
	}
	@Override
	public String toString() {
		return "Customer [id=" + id + ", username=" + username + 
				       ", jobs=" + jobs + ", phone=" + phone + "]";
	}
}

 com.springmvcmybatis.controller/HomeController.java

package com.springmvcmybatis.controller;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import com.springmvcmybatis.mapper.CustomerMapper;
import com.springmvcmybatis.po.Customer;

@Controller
public class HomeController { 
	@RequestMapping("/home")
	public ModelAndView handleRequest(HttpServletRequest request, HttpServletResponse response) {
		ModelAndView mv = new ModelAndView();
	
		
		ApplicationContext ac = new ClassPathXmlApplicationContext("springmvcmybatis-config.xml");
		CustomerMapper cm = (CustomerMapper)ac.getBean(CustomerMapper.class);
		Customer c = cm.findCustomerById(1);
		System.out.println(c.getUsername());
		
		mv.addObject("msg","Hi,我是Home的變量。"+c.getUsername()); 
		return mv;
	}
}

WEB-INF/jsp/home.jsp

<%@ page language="java" contentType="text/html; charset=utf-8" pageEncoding="utf-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Insert title here</title>
</head>
<body>
hello ,I am home.${msg}
</body>
</html>

Jars 列表： 

 

 

注意：

1.阿里雲服務器 MySql8遠程功能啓用：在mysql的cmd模式下：新建用戶並授權，代碼：

 mysql> CREATE USER 'root1'@'%' IDENTIFIED BY 'password'; （您可以創建一個root1）

 mysql> grant all privileges on *.* to 'root1'@'%';

程序連接串需要爲：jdbc:mysql://1.2.3.4:3306/javadb?serverTimezone=UTC&useSSL=false&allowPublicKeyRetrieval=true

2.在測試類中一般這樣寫：

ApplicationContext ac = new ClassPathXmlApplicationContext("springmvcmybatis-config.xml");
		CustomerMapper cm = (CustomerMapper)ac.getBean(CustomerMapper.class);
		Customer c = cm.findCustomerById(1);

以獲得數據庫數據，但正式中應這樣:先寫一個Util，再在config.xml中配置一下即可。

package com.springmvcmybatis.util;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
//import org.springframework.stereotype.Component;

//@Component
public class SpringContextUtil implements ApplicationContextAware {
	private static ApplicationContext applicationContext;

	public ApplicationContext getApplicationContext() {
		return applicationContext;
	}

	public void setApplicationContext(ApplicationContext applicationContext) {
		SpringContextUtil.applicationContext = applicationContext;
	}

	@SuppressWarnings("unchecked")
	public static <T> T getBean(String name) throws BeansException {
		return (T) applicationContext.getBean(name);
	}
}

 配置：<bean id="springContextUtil" class="com.springmvcmybatis.SpringContextUtil" scope="singleton"></bean> 

最後在Controller中使用時：

	CustomerMapper cm = SpringContextUtil.getBean("CustomerMapper");
		Customer c = cm.findCustomerById(1);

3.在name-config.xml中寫上 <context:component-scan base-package="com.springmvcmybatis"></context:component-scan>

後，即不用再單個寫有註解的Controller的bean，會自動識別。 

4.SSM中css ， js 等靜態文件配置方法：

    a)將css   , js等文件夾放到WebContent目錄下。

    b)在name-servlet.xml中配置：

    <mvc:annotation-driven />
    <mvc:resources location="/WEB-INF/demo/" mapping="/demo/**"></mvc:resources>
     <mvc:resources location="/css/" mapping="/css/**"></mvc:resources>
    <mvc:resources location="/js/" mapping="/js/**"></mvc:resources>      

 

5. jsp包含文件中數據傳遞方法：在包含文件中寫：

  <jsp:include page="/WEB-INF/jsp/control/header.jsp" flush="true">
  <jsp:param value="0" name="id"/>
  </jsp:include>

被包含文件中取值方法  ： ${param.id}    或  <% String id = request.getParameter("id")%>
 

6.使用 mybatis pagehelper插件做分頁：參考：https://blog.csdn.net/m0_38105115/article/details/88542059

  先下載：https://github.com/pagehelper/Mybatis-PageHelper

和 jsqlparser 放到libs下。

然後在  edu-config.xml中的<bean id="sqlSessionFactory" > 中加入：

      
    <property name="plugins">
        <array>
            <bean class="com.github.pagehelper.PageInterceptor"> 
            </bean>
        </array>
    </property>

然後是代碼

public interface RoleMapper {
    Role getById(int id);
    Page<Role> getList();
}
<select id="getList" resultType="role">
        select * from role
    </select> 

SERVICE:

public interface RoleService {
    Role getById(int id);
    Page<Role> getList(int page,int size);
}

 

@Service("roleService")
class RoleServiceImpl implements RoleService {
    RoleMapper rm ;
    @Override
    public Role getById(int id) { 
        rm = SpringContextUtil.getBean("roleMapper"); 
        Role r = rm.getById(id);
        return r;
    } 
    @Override
    public Page<Role> getList(int page,int size){
        rm = SpringContextUtil.getBean("roleMapper"); 
         PageHelper.startPage(page, size); 
         return rm.getList();
    }
}
Controller:

public String list(int page,int size,ModelMap model) {     
      
            Page<Role> roleInfo = rs.getList(page, size);
            List<Role> roleList = roleInfo.getResult();
            long count = roleInfo.getTotal();
            
            for(Role r:roleList) {
                System.out.println("R:"+r.getName());
            }