SSM框架整合（以黑马程序员2022最新SSM框架教程P59为例）

目录

1. 创建一个Maven项目

2. 引入Maven依赖 

3. 编写配置类

SpringConfig类

JdbcConfig类

MyBatisConfig类

SpringMvcConfig类

ServletConfig类

4. 功能模块开发

domain实体类层

dao数据层

service业务层

controller表现层

总结，以备随时取用该框架。

1. 创建一个Maven项目

 等待maven配置完成...

添加必要的文件夹：

 

2. 引入Maven依赖 

  4.0.0

  com.itheima
  springmvc_ssm
  1.0-SNAPSHOT
  war

  
    UTF-8
    1.8
    1.8
  

  
    
      org.springframework
      spring-webmvc
      5.2.10.RELEASE
    
    
      org.springframework
      spring-jdbc
      5.2.10.RELEASE
    
    
      org.springframework
      spring-test
      5.2.10.RELEASE
    

    
      org.mybatis
      mybatis
      3.5.6
    
    
      org.mybatis
      mybatis-spring
      1.3.0
    
    
      mysql
      mysql-connector-java
      5.1.47
    

    
      com.alibaba
      druid
      1.1.16
    

    
      junit
      junit
      4.13.1
      test
    

    
      javax.servlet
      servlet-api
      2.5
      provided
    

    
      com.fasterxml.jackson.core
      jackson-databind
      2.9.0
    
  

  
    
      
        org.apache.tomcat.maven
        tomcat7-maven-plugin
        2.2
        
          80
          /
        
      
    
  

3. 编写配置类

 

SpringConfig类

package com.itheima.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.context.annotation.PropertySource;
import org.springframework.transaction.annotation.EnableTransactionManagement;

@Configuration//设置当前类为spring的配置类
@ComponentScan({"com.itheima.service"})//扫描加载所控制的bean
@PropertySource("classpath:jdbc.properties")//指定资源文件读取的位置
@Import({JdbcConfig.class, MybatisConfig.class})//该注解用于导入其他的配置类
@EnableTransactionManagement//开启事务！！！！！！！！！
public class SpringConfig {
}

JdbcConfig类

package com.itheima.config;

import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;

import javax.sql.DataSource;


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

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

    @Bean
    public PlatformTransactionManager transactionManager(DataSource dataSource){
        DataSourceTransactionManager ds = new DataSourceTransactionManager();
        ds.setDataSource(dataSource);
        return ds;
    }
}

MyBatisConfig类

package com.itheima.config;

import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.context.annotation.Bean;

import javax.sql.DataSource;

public class MybatisConfig {

    @Bean
    public SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource){
        SqlSessionFactoryBean factoryBean = new SqlSessionFactoryBean();
        factoryBean.setDataSource(dataSource);
        //该属性可以给包中的类注册别名，注册后可以直接使用类名，而不用使用全限定的类名（就是不用包含包名）。
        factoryBean.setTypeAliasesPackage("com.itheima.domain");
        return factoryBean;
    }

    //扫描映射，即dao包
    @Bean
    public MapperScannerConfigurer mapperScannerConfigurer(){
        MapperScannerConfigurer msc = new MapperScannerConfigurer();
        msc.setBasePackage("com.itheima.dao");
        return msc;
    }
}

SpringMvcConfig类

package com.itheima.config;

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;

@Configuration
@ComponentScan("com.itheima.controller")
@EnableWebMvc
public class SpringMvcConfig {
}

ServletConfig类

package com.itheima.config;

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

import javax.servlet.Filter;

public class ServletConfig extends AbstractAnnotationConfigDispatcherServletInitializer {
    protected Class[] getRootConfigClasses() {
        return new Class[]{SpringConfig.class};
    }

    protected Class[] getServletConfigClasses() {
        return new Class[]{SpringMvcConfig.class};
    }

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

    //乱码处理——post表单提交时处理中文乱码
    @Override
    protected Filter[] getServletFilters() {
        CharacterEncodingFilter filter = new CharacterEncodingFilter();
        filter.setEncoding("UTF-8");
        return new Filter[]{filter};
    }
}

4. 功能模块开发

 domain实体类层

package com.itheima.domain;

public class Book {
    //属性名一定要和数据库中的属性名一致
    private Integer id;
    private String type;
    private String name;
    private String description;

    @Override
    public String toString() {
        return "Book{" +
                "id=" + id +
                ", type='" + type + ''' +
                ", name='" + name + ''' +
                ", desc='" + description + ''' +
                '}';
    }

    public Integer getId() {
        return id;
    }

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

    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getDesc() {
        return description;
    }

    public void setDesc(String description) {
        this.description = description;
    }
}

dao数据层

package com.itheima.dao;

import com.itheima.domain.Book;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import java.util.List;

public interface BookDao {

//    @Insert("insert into tb_book values(null,#{type},#{name},#{desc})")
    @Insert("insert into tb_book (type,name,description) values(#{type},#{name},#{description});")
    public void save(Book book);

    @Update("update tb_book set type = #{type}, name = #{name}, description = #{description} where id=#{id};")
    public void update(Book book);

    @Delete("delete from tb_book where id=#{id};")
    public void delete(Integer id);

    @Select("select * from tb_book where id=#{id};")
    public Book getById(Integer id);

    @Select("select * from tb_book")
    public List getAll();
}

service业务层

接口

package com.itheima.service;

import com.itheima.domain.Book;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Transactional
public interface BookService {

    
    public boolean save(Book book);

    
    public boolean update(Book book);

    
    public boolean delete(Integer id);

    
    public Book getById(Integer id);

    
    public List getAll();
}

实现类

package com.itheima.service.impl;

import com.itheima.dao.BookDao;
import com.itheima.domain.Book;
import com.itheima.service.BookService;
import org.apache.ibatis.annotations.Select;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class BookServiceImpl implements BookService {

    @Autowired
    private BookDao bookDao;

    public boolean save(Book book) {
        bookDao.save(book);
        return true;
    }

    public boolean update(Book book) {
        bookDao.update(book);
        return true;
    }

    public boolean delete(Integer id) {
        bookDao.delete(id);
        return true;
    }

    public Book getById(Integer id) {
        return bookDao.getById(id);
    }

    public List getAll() {
        return bookDao.getAll();
    }
}

controller表现层

该层是服务器与前端连接交互的接口，前端数据接收、访问形式，后端结果反馈形式，各层错误处理等都在这一层实现。这里只展示最基础的REST风格的交互方式。

package com.itheima.controller;

import com.itheima.domain.Book;
import com.itheima.service.BookService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;

@RestController
@RequestMapping("/books")
public class BookController {
    @Autowired
    private BookService bookService;

    @PostMapping
    public boolean save(@RequestBody Book book) {
        return bookService.save(book);
    }

    @PutMapping
    public boolean update(@RequestBody Book book) {
        return bookService.update(book);
    }

    @DeleteMapping("/{id}")
    public boolean delete(@PathVariable Integer id) {
        return bookService.delete(id);
    }

    @GetMapping("/{id}")
    public Book getById(@PathVariable Integer id) {
        return bookService.getById(id);
    }

    @GetMapping
    public List getAll() {
        return bookService.getAll();
    }
}