spring+springMVC+mybatis整合

时间 2019-11-09

标签 spring+springmvc+mybatis spring springmvc mybatis 整合栏目 Spring 繁體版

原文原文链接

　　记录本身每一次的成长。html

　　项目目录先来一份，仅供参考java

　　先来上一份pom.xml的配置mysql

<?xml version="1.0" encoding="UTF-8"?>
<!--
  Licensed to the Apache Software Foundation (ASF) under one
  or more contributor license agreements.  See the NOTICE file
  distributed with this work for additional information
  regarding copyright ownership.  The ASF licenses this file
  to you under the Apache License, Version 2.0 (the
  "License"); you may not use this file except in compliance
  with the License.  You may obtain a copy of the License at

   http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing,
  software distributed under the License is distributed on an
  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  KIND, either express or implied.  See the License for the
  specific language governing permissions and limitations
  under the License.
-->
<!-- $Id: pom.xml 642118 2008-03-28 08:04:16Z reinhard $ -->
<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/maven-v4_0_0.xsd">

  <modelVersion>4.0.0</modelVersion>
  <packaging>war</packaging>

  <name>spring_MVC_mybatis</name>
  <groupId>lpp</groupId>
  <artifactId>spring_MVC_mybatis</artifactId>
  <version>1.0-SNAPSHOT</version>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <!-- spring版本号 -->
    <spring.version>4.2.5.RELEASE</spring.version>
    <!-- mybatis版本号 -->
    <mybatis.version>3.2.8</mybatis.version>
    <!-- mysql驱动版本号 -->
    <mysql-driver.version>5.1.29</mysql-driver.version>
    <!-- log4j日志包版本号 -->
    <slf4j.version>1.7.18</slf4j.version>
    <log4j.version>1.2.17</log4j.version>
  </properties>

  <dependencies>
    <!-- 添加jstl依赖 -->
    <dependency>
      <groupId>jstl</groupId>
      <artifactId>jstl</artifactId>
      <version>1.2</version>
    </dependency>

    <dependency>
      <groupId>javax</groupId>
      <artifactId>javaee-api</artifactId>
      <version>7.0</version>
    </dependency>

    <!-- 添加junit4依赖 -->
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.10</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <!-- spring对测试框架的简单封装功能 -->
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>4.2.0.RELEASE</version>
      <scope>test</scope>
    </dependency>

    <!-- 添加spring核心依赖 -->
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-core</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-web</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-oxm</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-tx</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-jdbc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-webmvc</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-context-support</artifactId>
      <version>${spring.version}</version>
    </dependency>
    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-aop</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <dependency>
      <groupId>org.springframework</groupId>
      <artifactId>spring-test</artifactId>
      <version>${spring.version}</version>
    </dependency>

    <!-- 添加mybatis依赖 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis</artifactId>
      <version>${mybatis.version}</version>
    </dependency>

    <!-- 添加mybatis/spring整合包依赖 -->
    <dependency>
      <groupId>org.mybatis</groupId>
      <artifactId>mybatis-spring</artifactId>
      <version>1.2.2</version>
    </dependency>

    <!-- 添加mysql驱动依赖 -->
    <dependency>
      <groupId>mysql</groupId>
      <artifactId>mysql-connector-java</artifactId>
      <version>${mysql-driver.version}</version>
    </dependency>
    <!-- 添加数据库链接池依赖 -->
    <dependency>
      <groupId>commons-dbcp</groupId>
      <artifactId>commons-dbcp</artifactId>
      <version>1.2.2</version>
    </dependency>

    <!-- 添加fastjson -->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.1.41</version>
    </dependency>

    <!-- 添加日志相关jar包 -->
    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>${log4j.version}</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>${slf4j.version}</version>
    </dependency>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>${slf4j.version}</version>
    </dependency>

    <!-- log end -->
    <!-- 映入JSON -->
    <dependency>
      <groupId>org.codehaus.jackson</groupId>
      <artifactId>jackson-mapper-asl</artifactId>
      <version>1.9.13</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <version>2.8.0</version>
    </dependency>
    <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <version>2.8.0</version>
    </dependency>

    <dependency>
      <groupId>commons-fileupload</groupId>
      <artifactId>commons-fileupload</artifactId>
      <version>1.3.1</version>
    </dependency>

    <dependency>
      <groupId>commons-io</groupId>
      <artifactId>commons-io</artifactId>
      <version>2.4</version>
    </dependency>

    <dependency>
      <groupId>commons-codec</groupId>
      <artifactId>commons-codec</artifactId>
      <version>1.9</version>
    </dependency>

      <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core -->
      <dependency>
          <groupId>com.fasterxml.jackson.core</groupId>
          <artifactId>jackson-core</artifactId>
          <version>2.8.0</version>
      </dependency>
      <!-- https://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-databind -->
      <dependency>
          <groupId>com.fasterxml.jackson.core</groupId>
          <artifactId>jackson-databind</artifactId>
          <version>2.8.0</version>
      </dependency><dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>RELEASE</version>
  </dependency>
  </dependencies>

</project>

　　接下来spring的配置文件，配置文件内容就很少介绍了，不少博客上都会有。记录一下整合过程吧。web

spring_mybatis,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:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
                        http://www.springframework.org/schema/beans/spring-beans-3.1.xsd
                        http://www.springframework.org/schema/context
                        http://www.springframework.org/schema/context/spring-context-3.1.xsd
                        http://www.springframework.org/schema/tx
                        http://www.springframework.org/schema/tx/spring-tx.xsd">
    <context:component-scan base-package="com.lpp.ssm.controller"/>
    <context:component-scan base-package="com.lpp.ssm.service"/>

    <bean id="propertyConfig" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:jdbc.properties"/>
    </bean>

    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/><!--${driverClasss}-->
        <property name="url" value="jdbc:mysql://localhost:3306/test"/><!--${jdbcUrl}-->
        <property name="username" value="root"/><!--${username}-->
        <property name="password" value=""/>
        <!-- <!–初始化链接大小–>
        <property name="initialSize" value="${initialSize}"></property>
        <!– 链接池最大数量 –>
        <property name="maxActive" value="${maxActive}"></property>
        <!– 链接池最大空闲 –>
        <property name="maxIdle" value="${maxIdle}"></property>
        <!– 链接池最小空闲 –>
        <property name="minIdle" value="${minIdle}"></property>
        <!– 获取链接最大等待时间 –>
        <property name="maxWait" value="${maxWait}"></property>-->
    </bean>

    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource"/>
        <property name="configLocation" value="classpath:mybatisConfig.xml"/>
        <property name="mapperLocations" value="classpath:mapper/*.xml"/>
    </bean>

    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.lpp.ssm.dao"/>
        <!--<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>-->
    </bean>

    <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- (事务管理)transaction manager, use JtaTransactionManager for global tx -->
    <tx:annotation-driven transaction-manager="transactionManager"/>
</beans>

　　而后是mybaits的配置mybatisconfig.xml 作测试用，配置的也都很简单。spring

<?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>
    <settings>
        <setting name="logImpl" value="log4j"/>
    </settings>
    <typeAliases>
        <typeAlias type="com.lpp.ssm.entity.Car" alias="car"/>
    </typeAliases>
</configuration>

　　mapper.xmlsql

<?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.lpp.ssm.dao.CarMapper">
<select id="selectOneById" resultType="car" parameterType="int">
    SELECT id,car_name AS carName,maxSpeed FROM t_car WHERE id = #{id};
</select>
</mapper>

　　com.lpp.ssm.dao下的carMapper接口数据库

package com.lpp.ssm.dao;

import com.lpp.ssm.entity.Car;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: lpp
 * Date: 2018-04-28
 * Time: 22:38
 */

public interface CarMapper {
    public Car selectOneById(int id);
}

　　com.lpp.ssm.service下的carService类:express

package com.lpp.ssm.service;

import com.lpp.ssm.dao.CarMapper;
import com.lpp.ssm.entity.Car;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: lpp
 * Date: 2018-04-28
 * Time: 23:06
 */
@Service
public class CarSercice {
    @Autowired
    CarMapper carMapper;

    public Car selectCarById (int id){
        return carMapper.selectOneById(id);
    }
}

　　而后整合SpringMVC 先配置springMVC.xmlapache

<?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/context
                        http://www.springframework.org/schema/context/spring-context-4.0.xsd
                        http://www.springframework.org/schema/mvc
                        http://www.springframework.org/schema/mvc/spring-mvc-4.0.xsd">
    <!-- 自动扫描  @Controller-->
    <context:component-scan base-package="com.lpp.ssm.controller"/>

    <!--避免IE执行AJAX时，返回JSON出现下载文件 -->
    <bean id="mappingJacksonHttpMessageConverter"
          class="org.springframework.http.converter.json.MappingJackson2HttpMessageConverter">
        <property name="supportedMediaTypes">
            <list>
                <value>text/html;charset=UTF-8</value>
            </list>
        </property>
    </bean>
    <!-- 启动SpringMVC的注解功能，完成请求和注解POJO的映射 -->
    <!--<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter">
        <property name="messageConverters">
            <list>
                <ref bean="mappingJacksonHttpMessageConverter"/> <!– JSON转换器 –>
            </list>
        </property>
    </bean>-->

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix" value="/WEB-INF/jsp/"/>
        <property name="suffix" value=".jsp"/>
    </bean>
</beans>

　　而后是web.xmljson

<?xml version="1.0" encoding="UTF-8" ?>
<web-app 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_3_0.xsd"
         version="3.0">
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:spring-mybatis.xml</param-value>
    </context-param>

    <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>classpath:log4j.properties</param-value>
    </context-param>

    <!-- 编码过滤器 -->
    <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>

    <!-- spring监听器 -->
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>

    <!-- 防止spring内存溢出监听器，好比quartz -->
    <listener>
        <listener-class>org.springframework.web.util.IntrospectorCleanupListener</listener-class>
    </listener>

    <servlet>
        <servlet-name>SpringMVC</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>classpath:spring-mvc.xml</param-value>
        </init-param>
    </servlet>

    <servlet-mapping>
        <servlet-name>SpringMVC</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

　　接下来是实体类

package com.lpp.ssm.entity;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: lpp
 * Date: 2018-04-28
 * Time: 20:54
 */
public class Car {
    private int id;
    private String carName;
    private int maxSpeed;

    public Car() {
    }

    public Car(int id, String carName, int maxSpeed) {
        this.id = id;
        this.carName = carName;
        this.maxSpeed = maxSpeed;
    }

    public int getId() {
        return id;
    }

    public String getCarName() {
        return carName;
    }

    public int getMaxSpeed() {
        return maxSpeed;
    }

    public void setId(int id) {
        this.id = id;
    }

    public void setCarName(String carName) {
        this.carName = carName;
    }

    public void setMaxSpeed(int maxSpeed) {
        this.maxSpeed = maxSpeed;
    }

    @Override
    public String toString() {
        return "Car{" +
                "id=" + id +
                ", carName='" + carName + '\'' +
                ", maxSpeed=" + maxSpeed +
                '}';
    }
}

　　测试用的controller

package com.lpp.ssm.controller;

import com.lpp.ssm.entity.Car;
import com.lpp.ssm.service.CarSercice;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpRequest;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import java.util.Map;
import java.util.logging.Logger;

/**
 * Created with IntelliJ IDEA.
 * Description:
 * User: lpp
 * Date: 2018-04-27
 * Time: 21:26
 */
@Controller
public class TestContorller {
    @Autowired
    CarSercice carSercice;

    @RequestMapping("/login")
    public String toLogin(HttpServletRequest request, Model model){
        int id = Integer.parseInt(request.getParameter("id"));
        Car car = carSercice.selectCarById(id);
        model.addAttribute("id",car.getId());
        model.addAttribute("carName",car.getCarName());
        model.addAttribute("speed",car.getMaxSpeed());
        return "login";
    }
}

　　log4j的配置

log4j.rootLogger=DEBUG,Console,File  

#控制台日志
log4j.appender.Console=org.apache.log4j.ConsoleAppender  
log4j.appender.Console.Target=System.out  
log4j.appender.Console.layout=org.apache.log4j.PatternLayout  
log4j.appender.Console.layout.ConversionPattern=[%p][%t][%d{yyyy-MM-dd HH\:mm\:ss}][%C] - %m%n  

#普通文件日志
#log4j.appender.File=org.apache.log4j.RollingFileAppender
#log4j.appender.File.File=logs/ssm.log
#log4j.appender.File.MaxFileSize=10MB
#输出日志，若是换成DEBUG表示输出DEBUG以上级别日志
log4j.appender.File.Threshold=ALL  
log4j.appender.File.layout=org.apache.log4j.PatternLayout  
log4j.appender.File.layout.ConversionPattern=[%p][%t][%d{yyyy-MM-dd HH\:mm\:ss}][%C] - %m%n

　　jdbc属性文件

这里注意每一行行末不要出现空格，不然会出现找不到该属性或该属性错误的异常。

driverClasss=com.mysql.jdbc.Driver  
jdbcUrl=jdbc:mysql://localhost:3306/test
username=root  
#password=root   

#定义初始链接数  
initialSize=0  
#定义最大链接数
maxActive=20  
#定义最大空闲
maxIdle=20  
#定义最小空闲
minIdle=1  
#定义最长等待时间
maxWait=60000

　　最后附上index.jsp和login.jsp的内容，仅供参考。

<%--
  Created by IntelliJ IDEA.
  User: lpp
  Date: 2018/5/3
  Time: 20:16
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
<form method="post" action="/login">
    <input id="id" name="id" type="text">
    <button type="submit">submit</button>
</form>
</body>
</html>

<%--
  Created by IntelliJ IDEA.
  User: lpp
  Date: 2018/4/27
  Time: 21:23
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>login</title>
</head>
<body>
<td>
    <tr>${id}</tr>
    <tr>${carName}</tr>
    <tr>${speed}</tr>
</td>

</body>
</html>

　　而后就结束了。大功告成。

　　最后提示你们一点，是我出现过的错误。在controller中的requestmapping标注的方法中。接受的参数若是用基本类型或者对象接受的话，注意该参数是不能够为null的。有可能会出现，前台传值并未传过来，mybatis使用该参数查询的时候查询不到，并报错。

　　解决方法使用@RequestParam(value = "username",required = false)String username 声明参数以后，该值就能够为null了。

　　不知道形容的具体是否正确，暂时记录下来，避免之后踩坑吧。