Spring整合mybatis 1 查询_导入cn.kgc.mapper。无法解决goodsmapper如何解决-优快云博客

本文介绍了一个基于Spring MVC和MyBatis的简单项目框架搭建过程，包括配置web.xml、spring-mvc.xml和spring-mybatis.xml等核心文件，以及实现从数据获取到页面展示的完整流程。

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框架如图：

web.xml文件代码

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" 
	xmlns="http://java.sun.com/xml/ns/javaee" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
	xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
	http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
  <!-- 1.spring监听 -->
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/spring-mybatis.xml</param-value>
	</context-param>
	<!--spring-->
	<listener>
		<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
	</listener>
	<!-- 2.springmvc -->
	<servlet>
	  <servlet-name>springmvc</servlet-name>
	  <servlet-class> org.springframework.web.servlet.DispatcherServlet</servlet-class>
	  <init-param>
	    <param-name>contextConfigLocation</param-name>
	    <param-value>/WEB-INF/spring-mvc.xml</param-value>
	  </init-param>
	</servlet>
	<servlet-mapping>
	  <servlet-name>springmvc</servlet-name>
	  <url-pattern>/</url-pattern>
	</servlet-mapping>
	<!-- 3.字符编码处理 -->
	<filter>  
        <filter-name>encodingFilter</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>encodingFilter</filter-name>  
        <url-pattern>/*</url-pattern>  
    </filter-mapping>
</web-app>

spring-mvc.xml代码

<?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:p="http://www.springframework.org/schema/p"
 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-3.0.xsd  
    http://www.springframework.org/schema/context  
    http://www.springframework.org/schema/context/spring-context-3.0.xsd  
    http://www.springframework.org/schema/mvc  
    http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd  
    "> 
    <!-- 默认扫描包路径，扫描控制器 -->
    <context:component-scan base-package="com.controller"></context:component-scan>
	<!-- 注解驱动 -->
	<mvc:annotation-driven/>
	<!-- 视图解析器 -->  
    <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">  
        <property name="prefix" value="/" />  
        <property name="suffix" value=".jsp" />  
    </bean> 
</beans>

spring-mybatis.xml代码

<?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:p="http://www.springframework.org/schema/p"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans 
	http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context-3.0.xsd">
	<!-- 1.自动扫描 -->
	<context:component-scan base-package="com"></context:component-scan>
	<!-- 2.配置数据源，就是原来mybatis的代码,此处使用dbcp数据源连接池 -->
	<bean id="datasource" class="org.apache.commons.dbcp.BasicDataSource">
		<property name="driverClassName" value="oracle.jdbc.OracleDriver"/>
		<property name="url" 			 value="jdbc:oracle:thin:@192.168.62.250:1521:orcl"/>
		<property name="username"        value="scott"/>
		<property name="password"        value="tiger"/>
	</bean>
	<!-- 3.配置sqlSessionFactory -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="datasource"/><!-- 数据源连接池 -->
		<property name="mapperLocations" value="classpath:com/mapper/*.xml"></property>
	</bean>
	<!-- 4.mapper扫描器 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.dao"/>
		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
	</bean>
</beans>

src下框架各个包中的代码实现；

实体类，Emp类

package com.entity;

public class Emp {

	private int empNo;
	private String eName;
	private String salary;
	public int getEmpNo() {
		return empNo;
	}
	public void setEmpNo(int empNo) {
		this.empNo = empNo;
	}
	public String geteName() {
		return eName;
	}
	public void seteName(String eName) {
		this.eName = eName;
	}
	public String getSalary() {
		return salary;
	}
	public void setSalary(String salary) {
		this.salary = salary;
	}
	
}

EmpDao接口

package com.dao;

import java.util.List;
import java.util.Map;
import com.entity.Emp;


public interface EmpDao {
  public List<Emp> search();
}

mapper.xml映射文件

<?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.dao.EmpDao">
	<select id="search" resultType="com.entity.Emp">
		select empno ,ename , sal from emp
	</select>
</mapper>

Service接口

package com.service;

import java.util.List;

import com.entity.Emp;

public interface IEmpService {

	List<Emp> getList();

}

Service接口的实现类

package com.service.impl;

import java.util.List;

import javax.annotation.Resource;
import org.springframework.stereotype.Component;
import com.dao.EmpDao;
import com.entity.Emp;
import com.service.IEmpService;

@Component
public class EmpServiceImpl implements IEmpService{

	@Resource
	private EmpDao empDao;
	public List<Emp> getList() {
		return empDao.search();
	}

}

控制器代码实现：

package com.controller;

import java.util.List;
import javax.annotation.Resource;
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.entity.Emp;
import com.service.IEmpService;
@Controller
@RequestMapping("/emp")
public class EmpController {

	@Resource
	private IEmpService service;
	
	@RequestMapping("/list")
	public String toIndex(Model model){
		List<Emp> emps=service.getList();
		System.out.println(emps.size()+".......");
		model.addAttribute("eno", emps.size());
		model.addAttribute("empList", emps);
		return "list";
	}
	
}

视图层页面代码如下：

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">
    <title>My JSP 'index.jsp' starting page</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
  </head>
  
  <body>ddd
    ${eno }
     <c:forEach items="${empList}" var="emp">
         ${emp.eName} <br/>
     </c:forEach>
  </body>
</html>

显示结果是oracle中实例表,Emp表中的数据显示在页面。