springmvc+mybatis(配置文件實現demon)

springmvc+mybatis(配置文件實現demon)

項目結構

相關配置文件
1、pom.xml

<dependencies>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.11</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.2.3.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>5.2.3.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>5.2.3.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>2.5</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.3</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>2.0.3</version>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.18</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.3.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.10.2</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-core</artifactId>
            <version>2.10.2</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>2.10.2</version>
        </dependency>
    </dependencies>

2、web.xml

<!DOCTYPE web-app PUBLIC
 "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
 "http://java.sun.com/dtd/web-app_2_3.dtd" >

<web-app>
  <display-name>Archetype Created Web Application</display-name>
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>/WEB-INF/applicationContext.xml</param-value>
    </context-param>
    <listener>
        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
    </listener>
    <servlet>
        <servlet-name>dispatcher</servlet-name>
        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>WEB-INF/dispatcher-servlet.xml</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>dispatcher</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

3、jdbc.properties

jdbc.url=jdbc:mysql://172.*.*.*:3306/test?useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT
jdbc.username=root
jdbc.password=11111111

4、dispatcher-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/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc https://www.springframework.org/schema/mvc/spring-mvc.xsd">
    <!--掃描controller -->
    <context:component-scan base-package="com.qing.zhao.controller"></context:component-scan>

    <!--可以將request參數與綁定到controller參數上-->
    <mvc:annotation-driven >
        <mvc:message-converters>
            <bean class="org.springframework.http.converter.StringHttpMessageConverter">
                <property name="supportedMediaTypes" value="text/html;charset=UTF-8"/>
            </bean>
        </mvc:message-converters>
    </mvc:annotation-driven>

    <!--啓動相關注解-->
    <context:annotation-config></context:annotation-config>

    <!-- 對模型視圖名稱的解析，即在模型視圖名稱添加前後綴(如果最後一個還是表示文件夾,則最後的斜槓不要漏了) 使用JSP-->
    <!-- 默認的視圖解析器 在上邊的解析錯誤時使用 (默認使用html)- -->
    <bean id="defaultViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"/>
        <property name="prefix" value="/WEB-INF/view/"/><!--設置JSP文件的目錄位置-->
        <property name="suffix" value=".jsp"/>
        <property name="exposeContextBeansAsAttributes" value="true"/>
    </bean>
</beans>

5、applicationContext.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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context https://www.springframework.org/schema/context/spring-context.xsd">
    <!--掃描業務層包-->
    <context:component-scan base-package="com.qing.zhao.service"></context:component-scan>

    <!--數據相關配置-->
    <!-- 加載配置文件 -->
    <context:property-placeholder location="WEB-INF/jdbc.properties"/>
    <!-- 數據庫連接池-->
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
        <property name="driverClassName" value="com.mysql.jdbc.Driver"/>
    </bean>
    <!-- SqlSessionFactory配置 -->
    <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <!-- 加載mybatis的全局配置文件 -->
        <property name="mapperLocations" value="WEB-INF/mapper/*.xml" />
    </bean>
    <!-- mapper掃描器 -->
    <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <!-- 掃描包路徑，如果需要掃描多個包，中間使用半角逗號隔開  -->
        <property name="basePackage" value="com.qing.zhao.dao"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/>
    </bean>
    <!-- 事務管理器-->
    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource"/>
    </bean>
</beans>

6、HelloMapper.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.qing.zhao.dao.HelloDao" >
    <!--resultType注意這個返回類型，resultMap返回類型寫法不一樣，可以參考別的教程-->
    <resultMap id="BaseResult" type="com.qing.zhao.module.Product">
        <result column="productSkn" property="productSkn" jdbcType="INTEGER"></result>
        <result column="productName" property="productName" jdbcType="VARCHAR"></result>
    </resultMap>
    <select id="selectAllProduct" resultMap="BaseResult" >
      SELECT productSkn, productName FROM product;
    </select>

</mapper>

相關邏輯代碼
1、Product.java

package com.qing.zhao.module;

import com.sun.xml.internal.rngom.ast.builder.Include;

public class Product {
    private Integer productSkn;
    private String productName;

    public Integer getProductSkn() {
        return productSkn;
    }

    public void setProductSkn(Integer productSkn) {
        this.productSkn = productSkn;
    }

    public String getProductName() {
        return productName;
    }

    public void setProductName(String productName) {
        this.productName = productName;
    }

    @Override
    public String toString() {
        return "Product{" +
                "productSkn=" + productSkn +
                ", productName='" + productName + '\'' +
                '}';
    }
}

2、HelloController.java

package com.qing.zhao.controller;

import com.qing.zhao.module.Product;
import com.qing.zhao.service.HelloService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.List;

@Controller
@RequestMapping("/hi")
public class HelloController {

    @Autowired
    private HelloService helloService;

    @RequestMapping("/hello")
    @ResponseBody
    public String helloWorld(){
        String params = "張三";
        return helloService.sayHello(params);
    }

    @RequestMapping("/queryAllProduct")
    @ResponseBody
    public List<Product> queryAllProduct(){
        return helloService.queryAllProduct();
    }
}

3、HelloDao.java

package com.qing.zhao.dao;

import com.qing.zhao.module.Product;

import java.util.List;

public interface HelloDao {
    List<Product> selectAllProduct();
}

4、HelloService.java

package com.qing.zhao.service;

import com.qing.zhao.module.Product;

import java.util.List;

public interface HelloService {
    String sayHello(String params);

    List<Product> queryAllProduct();
}

5、HelloServiceImpl.java

package com.qing.zhao.service.impl;

import com.qing.zhao.dao.HelloDao;
import com.qing.zhao.module.Product;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import com.qing.zhao.service.HelloService;

import java.util.List;

@Service
public class HelloServiceImpl implements HelloService {

    @Autowired
    private HelloDao helloDao;

    @Override
    public String sayHello(String params) {
        return "你好："+params;
    }

    @Override
    public List<Product> queryAllProduct() {
        return helloDao.selectAllProduct();
    }
}

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