• springmvc整合mybatis详细教程


    需求:整合springmvc和mybatis

    整合的目标是:控制层采用springmvc,持久层使用mybatis

    整合思想

    dao层:

    1、SqlMapConfig.xml.空文件即可。但是需要头文件。使用逆向工程的时候可以不配置别名。

    2、applicationContext.xml

    1)数据库连接池

    2)SqlSessionFactory对象

    3)配置mapper文件扫描器

    4)事务管理

    5)开启注解事务

    3、db.properties  存放数据库的配置信息

    controller层:

    springmvc.xml

    1)包扫描器

    2)配置注解驱动

    3)配置视图解析器

    web.xml

    1)配置spring

    2)配置前端控制器

    其它可选配置

    log4j.properties

    整合步骤

    1 创建动态web工程

    2 导入所需的jar

    3 SqlMapConfgi.xml

     如果使用逆向工程的话,可以不需要配置别名,空文件即可,但是需要头文件。

    <?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>
        <!-- 设置别名 -->
        <typeAliases>
            <!-- 2. 指定扫描包,会把包内所有的类都设置别名,别名的名称就是类名,大小写不敏感 -->
            <package name="com.test.springmvc.pojo" />
        </typeAliases>
    </configuration>

    4 applicationContext.xml

    1.数据库连接池

    2.SqlSessionFactory对象,需要springmybatis整合包下的

    3.配置mapper文件扫描器

    4.配置事务管理

    5.开启注解

    <?xml version="1.0" encoding="UTF-8"?>
    <beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
           xmlns="http://www.springframework.org/schema/beans"
           xmlns:context="http://www.springframework.org/schema/context" 
           xmlns:aop="http://www.springframework.org/schema/aop" 
           xmlns:tx="http://www.springframework.org/schema/tx"
           xmlns:p="http://www.springframework.org/schema/p"
           xsi:schemaLocation="http://www.springframework.org/schema/beans 
                               http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
                               http://www.springframework.org/schema/context 
                               http://www.springframework.org/schema/context/spring-context-4.0.xsd
                               http://www.springframework.org/schema/aop 
                               http://www.springframework.org/schema/aop/spring-aop-4.0.xsd 
                               http://www.springframework.org/schema/tx 
                               http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
                               http://www.springframework.org/schema/util 
                               http://www.springframework.org/schema/util/spring-util-4.0.xsd">
    
        
        <!-- 1加载配置文件 -->
        <context:property-placeholder location="classpath:db.properties" />
    
        <!-- 2配置连接池 -->
        <bean name="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
            <property name="driverClassName" value="${jdbc.driver}" />
            <property name="url" value="${jdbc.url}" />
            <property name="username" value="${jdbc.username}" />
            <property name="password" value="${jdbc.password}" />
            <property name="maxActive" value="10" />
            <property name="maxIdle" value="5" />
        </bean>
        
        <!--3 配置SqlSessionFactory  -->
        <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
            <!-- 配置mybatis核心配置文件 -->
            <property name="configLocation" value="classpath:SqlMapConfig.xml" />
            <!-- 配置数据源 -->
            <property name="dataSource" ref="dataSource" />
        </bean>
        
        <!--4 Mapper代理开发   扫描  -->
        <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
            <property name="basePackage" value="com.test.springmvc.mapper"></property>
        </bean>
        
        <!--5 配置事务管理器 -->
        <bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            <property name="dataSource" ref="dataSource"></property>
        </bean>
        
        <!--6 开启注解 -->
        <tx:annotation-driven transaction-manager="transactionManager"/>
        
    </beans>

    5 db.properties

    jdbc.driver=com.mysql.jdbc.Driver
    jdbc.url=jdbc:mysql://39.105.94.154:3306/springmvc?characterEncoding=utf-8
    jdbc.username=tom
    jdbc.password=tom

    6 springmvc.xml

    1包扫描器

    2配置处理器映射器和处理器适配器(或者直接配置注解驱动就可以了)

    3配置视图解析器

    <?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-4.0.xsd
                               http://www.springframework.org/schema/mvc 
                               http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd
                               http://www.springframework.org/schema/context 
                               http://www.springframework.org/schema/context/spring-context-4.0.xsd">
        
        <!-- 配置扫描组件 ,扫描@Controller,@Service等-->
        <context:component-scan base-package="com.test.springmvc" />
    
        <!-- 配置注解驱动,如果配置此标签可以不用配置处理器映射器和适配器 -->
        <mvc:annotation-driven />
        
        <!-- 配置视图解析器 -->
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <!-- 配置逻辑视图的前缀 -->
            <property name="prefix" value="/WEB-INF/jsp/"></property>
            <!-- 配置逻辑视图的后缀 -->
            <property name="suffix" value=".jsp"></property>
        </bean>
        
    </beans>

    7 web.xml

    1. 配置spring监听器
    2. 配置前端控制器
    <?xml version="1.0" encoding="UTF-8"?>
    <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
      <display-name>springmvc</display-name>
      <welcome-file-list>
        <welcome-file>index.html</welcome-file>
        <welcome-file>index.htm</welcome-file>
        <welcome-file>index.jsp</welcome-file>
        <welcome-file>default.html</welcome-file>
        <welcome-file>default.htm</welcome-file>
        <welcome-file>default.jsp</welcome-file>
      </welcome-file-list>
        
        <!-- 配置spring -->
        <context-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:applicationContext.xml</param-value>
        </context-param>
        
        <!-- 使用监听器加载Spring配置文件 -->
        <listener>
              <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
        </listener>
        
        <!-- 配置过滤器,解决post的乱码问题 -->
        <filter>
            <filter-name>encoding</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>encoding</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>
        
        <!-- 配置SrpingMVC的前端控制器 -->
        <servlet>
            <servlet-name>springmvc-web</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:springmvc.xml</param-value>
            </init-param>
            <!-- 配置springmvc什么时候启动,参数必须为整数 -->
            <!-- 如果为0或者大于0,则springMVC随着容器启动而启动 -->
            <!-- 如果小于0,则在第一次请求进来的时候启动 -->
            <load-on-startup>1</load-on-startup>
        </servlet>
        <servlet-mapping>
            <servlet-name>springmvc-web</servlet-name>
            <!-- 配置所有以action结尾的请求进入SpringMVC -->
            <url-pattern>*.action</url-pattern>
        </servlet-mapping>
    </web-app>

    8 log4j.properties

    ### direct log messages to stdout ###
    log4j.appender.stdout=org.apache.log4j.ConsoleAppender
    log4j.appender.stdout.Target=System.err
    log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
    log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
    ### direct messages to file mylog.log ###
    log4j.appender.file=org.apache.log4j.FileAppender
    log4j.appender.file.File=d:\mylog.log
    log4j.appender.file.layout=org.apache.log4j.PatternLayout
    log4j.appender.file.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n
    ### set log levels - for more verbose logging change 'info' to 'debug' ###
    ### fatal error warn info debug trace u5982u679Cu4E0Du60F3u8981u8F93u51FAuFF1B log4j.rootLogger=off, stdout
    log4j.rootLogger=debug, stdout

    9 配置完成后的效果

    简单测试

    1 准备一个jsp页面

     

    代码内容:

    <%@ page language="java" contentType="text/html; charset=UTF-8"
        pageEncoding="UTF-8"%>
    <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
    <%@ taglib uri="http://java.sun.com/jsp/jstl/fmt"  prefix="fmt"%>
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
    <html>
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>查询商品列表</title>
    </head>
    <body> 
    <form action="${pageContext.request.contextPath }/item/queryitem.action" method="post">
    查询条件:
    <table width="100%" border=1>
    <tr>
    <td><input type="submit" value="查询"/></td>
    </tr>
    </table>
    商品列表:
    <table width="100%" border=1>
    <tr>
        <td>商品名称</td>
        <td>商品价格</td>
        <td>生产日期</td>
        <td>商品描述</td>
        <td>操作</td>
    </tr>
    <c:forEach items="${itemList }" var="item">
    <tr>
        <td>${item.name }</td>
        <td>${item.price }</td>
        <td><fmt:formatDate value="${item.createtime}" pattern="yyyy-MM-dd HH:mm:ss"/></td>
        <td>${item.detail }</td>
        
        <td><a href="${pageContext.request.contextPath }/itemEdit.action?id=${item.id}">修改</a></td>
    
    </tr>
    </c:forEach>
    
    </table>
    </form>
    </body>
    
    </html>
    View Code

    2 准备一个Items类

    package com.test.springmvc.pojo;
    
    import java.util.Date;
    
    public class Items {
        private Integer id;
    
        private String name;
    
        private Float price;
    
        private String pic;
    
        private Date createtime;
    
        private String detail;
    
        public Items(Integer id, String name, Float price, Date createtime, String detail) {
            super();
            this.id = id;
            this.name = name;
            this.price = price;
            this.createtime = createtime;
            this.detail = detail;
        }
    
    
        public Integer getId() {
            return id;
        }
    
        
        public void setId(Integer id) {
            this.id = id;
        }
    
        public String getName() {
            return name;
        }
    
        public void setName(String name) {
            this.name = name == null ? null : name.trim();
        }
    
        public Float getPrice() {
            return price;
        }
    
        public void setPrice(Float price) {
            this.price = price;
        }
    
        public String getPic() {
            return pic;
        }
    
        public void setPic(String pic) {
            this.pic = pic == null ? null : pic.trim();
        }
    
        public Date getCreatetime() {
            return createtime;
        }
    
        public void setCreatetime(Date createtime) {
            this.createtime = createtime;
        }
    
        public String getDetail() {
            return detail;
        }
    
        public void setDetail(String detail) {
            this.detail = detail == null ? null : detail.trim();
        }
    }
    View Code

    3 编写ItemsController

    package com.test.springmvc.controller;
    
    import java.util.ArrayList;
    import java.util.Date;
    import java.util.List;
    
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.servlet.ModelAndView;
    
    import com.test.springmvc.pojo.Items;
    
    @Controller
    public class ItemController {
        // @RequestMapping:里面放的是请求的url,和用户请求的url进行匹配
        // action可以写也可以不写
        @RequestMapping("/item/itemList.action")
        public ModelAndView queryItemList(){
            
            // 创建页面需要显示的商品数据
            List<Items> list = new ArrayList<>();
            list.add(new Items(1, "1华为 荣耀8", 2399f, new Date(), "质量好!1"));
            list.add(new Items(2, "2华为 荣耀8", 2399f, new Date(), "质量好!2"));
            list.add(new Items(3, "3华为 荣耀8", 2399f, new Date(), "质量好!3"));
            list.add(new Items(4, "4华为 荣耀8", 2399f, new Date(), "质量好!4"));
            list.add(new Items(5, "5华为 荣耀8", 2399f, new Date(), "质量好!5"));
            list.add(new Items(6, "6华为 荣耀8", 2399f, new Date(), "质量好!6"));
            
            // 创建ModelAndView,用来存放数据和视图
            ModelAndView modelAndView = new ModelAndView();
            
            // 设置视图jsp,需要设置视图的物理地址
            modelAndView.setViewName("itemList");
    
            // 设置数据到模型中
            modelAndView.addObject("itemList", list);
            
            return modelAndView;
        }
    }

    4 启动项目

    输入网址:http://localhost:8080/springmvc/item/itemList.action

    效果如下:

    乱码问题解决

    1 post提交乱码问题解决

    web.xml中加入:

        <!-- 解决post乱码问题 -->
        <filter>
            <filter-name>encoding</filter-name>
            <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
            <!-- 设置编码参是UTF8 -->
            <init-param>
                <param-name>encoding</param-name>
                <param-value>UTF-8</param-value>
            </init-param>
        </filter>
        <filter-mapping>
            <filter-name>encoding</filter-name>
            <url-pattern>/*</url-pattern>
        </filter-mapping>

    2 get提交乱码问题解决

    对于get请求中文参数出现乱码解决方法有两个:

    修改tomcat配置文件添加编码与工程编码一致,如下:

    另外一种方法对参数进行重新编码:

     

    ISO8859-1tomcat默认编码,需要将tomcat编码后的内容按utf-8编码

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  • 原文地址:https://www.cnblogs.com/jepson6669/p/9034817.html
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