springmvc+mybatis(純註解實現Demon)

springmvc+mybatis(純註解實現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、jdbc.properties

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

相關配置類
1、ConfigrationApp.java

package com.qing.zhao.configration;

import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;

public class ConfigrationApp extends AbstractAnnotationConfigDispatcherServletInitializer {
    protected Class<?>[] getRootConfigClasses() {
        return new Class[]{RootConfig.class};
    }

    protected Class<?>[] getServletConfigClasses() {
        return new Class[]{MvcConfig.class};
    }

    protected String[] getServletMappings() {
        return new String[]{"/"};
    }
}

2、MvcConfig.java

package com.qing.zhao.configration;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.FilterType;
import org.springframework.http.MediaType;
import org.springframework.http.converter.HttpMessageConverter;
import org.springframework.http.converter.StringHttpMessageConverter;
import org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
import org.springframework.web.servlet.ViewResolver;
import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import org.springframework.web.servlet.mvc.Controller;
import org.springframework.web.servlet.view.InternalResourceViewResolver;

import java.awt.event.WindowAdapter;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;

@Configuration
@EnableWebMvc
@ComponentScan(value = "com.qing.zhao.controller")
public class MvcConfig extends WebMvcConfigurerAdapter{

    @Bean
    public ViewResolver viewResolver() {
        InternalResourceViewResolver resolver = new InternalResourceViewResolver();
        resolver.setPrefix("/WEB-INF/views/");
        resolver.setSuffix(".jsp");
        resolver.setExposeContextBeansAsAttributes(true);
        return resolver;
    }


    @Override
    public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
        configurer.enable();
    }

    /**
     * 解決字符串和json中文亂碼
     * @param converters
     */
    @Override
    public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
        StringHttpMessageConverter shm = new StringHttpMessageConverter(Charset.forName("utf-8"));
        MappingJackson2HttpMessageConverter jackson2HttpMessageConverter = new MappingJackson2HttpMessageConverter();
        converters.add(shm);
        converters.add(jackson2HttpMessageConverter);
    }

}

3、RootConfig.java

package com.qing.zhao.configration;

import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.context.support.PropertySourcesPlaceholderConfigurer;
import org.springframework.core.io.support.PathMatchingResourcePatternResolver;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.jdbc.datasource.DriverManagerDataSource;

import javax.sql.DataSource;
import java.io.IOException;

@Configuration
@PropertySource("classpath:jdbc.properties") // 讀取jdbc.properties
@MapperScan("com.qing.zhao.dao") //掃描Mybatis的Mapper接口
@ComponentScan(value = "com.qing.zhao.service")
public class RootConfig {

    @Value("${jdbc.driver}")
    private String driverClassName;
    @Value("${jdbc.url}")
    private String url;
    @Value("${jdbc.username}")
    private String username;
    @Value("${jdbc.password}")
    private String password;


    @Bean
    public DataSource dataSource(){
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName(driverClassName);
        dataSource.setUrl(url);
        dataSource.setUsername(username);
        dataSource.setPassword(password);
        return dataSource;
    }

    @Bean
    public SqlSessionFactoryBean sqlSessionFactoryBean(DataSource dataSource){
        SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
        sqlSessionFactoryBean.setDataSource(dataSource);
        PathMatchingResourcePatternResolver pathMatchingResourcePatternResolver = new PathMatchingResourcePatternResolver();
        String packageSearchPath = ResourcePatternResolver.CLASSPATH_ALL_URL_PREFIX + "mapper/*.xml";
        try {
            sqlSessionFactoryBean.setMapperLocations(pathMatchingResourcePatternResolver.getResources(packageSearchPath));
        } catch (IOException e) {
            e.printStackTrace();
        }
        return sqlSessionFactoryBean;
    }
    @Bean
    public static PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer() {
        PropertySourcesPlaceholderConfigurer propertySourcesPlaceholderConfigurer = new PropertySourcesPlaceholderConfigurer();
        return propertySourcesPlaceholderConfigurer;
    }
}

相關邏輯代碼
1、Product.java

package com.qing.zhao.module;

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、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();
}

4、HelloServiceImpl.java

package com.qing.zhao.service.impl;

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

import java.util.List;

@Service
public class HelloServiceImpl implements HelloService {

    @Autowired
    private HelloMapper helloMapper;

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

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

運行結果