Utilice el proyecto maven para crear una plantilla de proyecto SSM

1 Crea un proyecto maven

Proyecto Java sin esqueleto

2. Crea un submódulo

itcast-ssm-web
itcast-ssm-domain
itcast-ssm-service
itcast-ssm-dao
itcast-ssm-utils
Tenga en cuenta que elegimos un proyecto web al crear itcast-ssm-web

3. Agregue dependencia en pom.xml en el proyecto principal

<?xml version="1.0" encoding="UTF-8"?>
<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/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.itheima.heima_ssm</groupId>
    <artifactId>heima_ssm</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <properties>
        <spring.version>5.0.2.RELEASE</spring.version>
        <slf4j.version>1.6.6</slf4j.version>
        <log4j.version>1.2.12</log4j.version>
        <mybatis.version>3.4.5</mybatis.version>
        <spring.security.version>5.0.1.RELEASE</spring.security.version>
    </properties>
     <modules>
        <module>heima_ssm_dao</module>
        <module>heima_ssm_service</module>
        <module>heima_ssm_domain</module>
        <module>heima_ssm_utils</module>
        <module>heima_ssm_web</module>
    </modules>


    <dependencies>        <!-- spring -->
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.6.8</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</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>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-orm</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>${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-tx</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet.jsp</groupId>
            <artifactId>jsp-api</artifactId>
            <version>2.0</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>1.2</version>
        </dependency>        <!-- log start -->
        <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 -->

        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>${mybatis.version}</version>
        </dependency>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis-spring</artifactId>
            <version>1.3.0</version>
        </dependency>
        <dependency>
            <groupId>c3p0</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.1.2</version>
            <type>jar</type>
            <scope>compile</scope>
        </dependency>
        <dependency>
            <groupId>com.github.pagehelper</groupId>
            <artifactId>pagehelper</artifactId>
            <version>5.1.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-web</artifactId>
            <version>${spring.security.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-config</artifactId>
            <version>${spring.security.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-core</artifactId>
            <version>${spring.security.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.security</groupId>
            <artifactId>spring-security-taglibs</artifactId>
            <version>${spring.security.version}</version>
        </dependency>

        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.19</version>
        </dependency>

        <dependency>
            <groupId>javax.annotation</groupId>
            <artifactId>jsr250-api</artifactId>
            <version>1.0</version>
        </dependency>
    </dependencies>


    <!--插件-->
    <build>
        <pluginManagement>
            <plugins>
                <plugin>
                    <groupId>org.apache.maven.plugins</groupId>
                    <artifactId>maven-compiler-plugin</artifactId>
                    <version>3.2</version>
                    <configuration>
                        <source>1.8</source>
                        <target>1.8</target>
                        <encoding>UTF-8</encoding>
                        <showWarnings>true</showWarnings>
                    </configuration>
                </plugin>
            </plugins>
        </pluginManagement>
    </build>
   

</project>

4. Cree dos paquetes, java y resources, en el directorio principal en itcast-ssm-web, y escriba e integre los archivos de configuración de ssm en resourcesl

5. Integración de archivos de configuración applicationContext.xml, spring-mvc.xml, web.xml

El contenido del archivo de configuración está en esta figura.
Applicationcontext.xml es el archivo de configuración de Spring . La integración de Spring de mybatis es usar Spring para controlar la administración de SqlSessionFactory.

6. Escriba el código en el dominio, dao, servicio y controlador, como consultar todos

clase de producto en el dominio

package com.domain;

import com.utils.DateUtils;
import org.springframework.format.annotation.DateTimeFormat;

import java.util.Date;

/**
 * 产品信息
 */
public class Product {

    private String id; // 主键
    private String productNum; // 编号 唯一
    private String productName; // 名称
    private String cityName; // 出发城市
    @DateTimeFormat(pattern="yyyy-MM-dd HH:mm")
    private Date departureTime; // 出发时间
//    这个是为了格式化数据 方便展示
    private String departureTimeStr;
    private double productPrice; // 产品价格
    private String productDesc; // 产品描述
    private Integer productStatus; // 状态 0 关闭 1 开启
//    这个也是为了格式化数据，方便展示
    private String productStatusStr;

    public String getId() {
        return id;
    }

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

    public String getProductNum() {
        return productNum;
    }

    public void setProductNum(String productNum) {
        this.productNum = productNum;
    }

    public String getProductName() {
        return productName;
    }

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

    public String getCityName() {
        return cityName;
    }

    public void setCityName(String cityName) {
        this.cityName = cityName;
    }

    public Date getDepartureTime() {
        return departureTime;
    }

    public void setDepartureTime(Date departureTime) {
        this.departureTime = departureTime;
    }

    public String getDepartureTimeStr() {
        if(departureTime!=null){
            departureTimeStr= DateUtils.date2String(departureTime,"yyyy-MM-dd HH:mm:ss");
        }
        return departureTimeStr;
    }

    public void setDepartureTimeStr(String departureTimeStr) {
        this.departureTimeStr = departureTimeStr;
    }

    public double getProductPrice() {
        return productPrice;
    }

    public void setProductPrice(double productPrice) {
        this.productPrice = productPrice;
    }

    public String getProductDesc() {
        return productDesc;
    }

    public void setProductDesc(String productDesc) {
        this.productDesc = productDesc;
    }

    public Integer getProductStatus() {
        return productStatus;
    }

    public void setProductStatus(Integer productStatus) {
        this.productStatus = productStatus;
    }

    public String getProductStatusStr() {

//        显示状态信息
        if (productStatus != null) {
            // 状态 0 关闭 1 开启
            if(productStatus==0)
                productStatusStr="关闭";
            if(productStatus==1)
                productStatusStr="开启";
        }
        return productStatusStr;
    }

    public void setProductStatusStr(String productStatusStr) {
        this.productStatusStr = productStatusStr;
    }
}

en dao

package com.dao;

import com.domain.Product;
import org.apache.ibatis.annotations.Select;

import java.util.List;

public interface IProductDao {
//    查询所有
    @Select("select * from product")
    List<Product> findAll() throws Exception;

    //    @Insert("insert into product(productNum,productName,cityName,departureTime,productPrice,productDesc,productStatus)
//    values(#{productNum},#{productName},#{cityName},#{departureTime},#{productPrice},#{productDesc},#{productStatus})")
//    void save(Product product);
}

Servicio

package com.service;

import com.domain.Product;

import java.util.List;

public interface IProductService {

     public List<Product> findAll() throws Exception;
}


实现类
package com.service.impl;

import com.domain.Product;
import com.dao.IProductDao;
import com.service.IProductService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
//事务
@Transactional
public class ProductServiceImpl implements IProductService {

    //自动按照类型注入
    @Autowired
    private IProductDao productDao;

    public List<Product> findAll() throws Exception {
//        List<Product> list = productDao.findAll();

        return productDao.findAll();

    }
}

controlador

package com.controller;

import com.domain.Product;
import com.service.IProductService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.ModelAndView;

import java.util.List;

//控制器
@Controller
@RequestMapping("/product")
public class ProductController {
//    引入serviced
    @Autowired
    private IProductService productService;
    //查询全部产品
    @RequestMapping("/findAll.do")
    public ModelAndView findAll() throws Exception {
        //创建一个ModelAndView对象
        ModelAndView mv = new ModelAndView();
        List<Product> products = productService.findAll();
        mv.addObject("productList", products);
        mv.setViewName("product-list");
//        mv.setViewName("test");
        return mv;
    }






}

7. Escribe index.jsp y la página que se mostrará.