基于SSM搭建系统
原理
-
SSM集成 = Spring+SpringMvc+Mybatis集成
-
框架集成核心，如果你的项目中，用到了Spring框架，那么其他框架主要就是和Spring集成；
-
和Spring集成的核心思路：
-
把当前框架的核心类，交给Spring管理（IOC）
-
如果框架有事务，那么事务也要统一交给Spring管理（AOP）
-
步骤
1、根据项目业务创建数据库和表格
SET FOREIGN_KEY_CHECKS=0;
-- ----------------------------
-- Table structure for `account_info`
-- ----------------------------
DROP TABLE IF EXISTS `account_info`;
CREATE TABLE `account_info` (
`account` varchar(11) COLLATE utf8mb4_general_ci NOT NULL COMMENT '用户账号，主键',
`acc_name` varchar(50) COLLATE utf8mb4_general_ci NOT NULL COMMENT '用户姓名',
`password` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL COMMENT '鐢ㄦ埛瀵嗙爜锛岄粯璁ゆ墜鏈哄彿鍚?浣?',
`acc_phone` varchar(11) COLLATE utf8mb4_general_ci NOT NULL COMMENT '手机号11位，唯一',
`is_enable` tinyint(1) NOT NULL COMMENT '是否启用（1：启用，0：未启用）',
`create_time` datetime NOT NULL COMMENT '创建时间',
`update_time` datetime NOT NULL COMMENT '更新时间',
PRIMARY KEY (`account`),
UNIQUE KEY `uk_phone` (`acc_phone`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
-- ----------------------------
-- Records of account_info
-- ----------------------------
INSERT INTO `account_info` VALUES ('YZ0001', 'admin', '92159b1631dae48aa523875174e3ea60', '13811345670', '1', '2023-08-18 11:34:28', '2023-08-18 11:34:28');
INSERT INTO `account_info` VALUES ('YZ0002', 'admin', '986fa807bbe0c721702868bae6ef8a33', '13811345679', '1', '2023-08-18 11:34:38', '2023-08-18 11:34:38');
INSERT INTO `account_info` VALUES ('YZ0003', 'admin2', '7d839f278639a38b2ba83ad67ab836a2', '13811345677', '1', '2023-08-18 14:46:05', '2023-08-18 14:46:05');
INSERT INTO `account_info` VALUES ('YZ0004', 'admin2', '35ea60fd301a3895245aff0ca4947d9e', '13811345674', '1', '2023-08-18 15:03:12', '2023-08-18 15:03:12');2、搭建一个maven项目
3、导入坐标依赖
org.springframework
spring-webmvc
5.3.8
javax.servlet
javax.servlet-api
3.1.0
provided
com.fasterxml.jackson.core
jackson-databind
2.9.0
mysql
mysql-connector-java
8.0.33
com.alibaba
druid
1.2.4
org.springframework
spring-jdbc
5.3.8
org.mybatis
mybatis
3.4.6
org.mybatis
mybatis-spring
1.3.0
org.projectlombok
lombok
1.18.20
4、编写实体类
package com.cqh.entity;
import lombok.Data;
import java.io.Serializable;
import java.util.Date;
@Data
public class AccountInfo implements Serializable {
private static final long serialVersionUID = 1L;
/**
* 用户账号，主键
*/
private String account;
/**
* 用户姓名
*/
private String accName;
/**
* 用户密码
*/
private String password;
/**
* 手机号11位，唯一
*/
private String accPhone;
/**
* 是否启用（1：启用，0：未启用）
*/
private Boolean isEnable;
/**
* 创建时间
*/
private Date createTime;
/**
* 更新时间
*/
private Date updateTime;
}
5、编写mapper接口
package com.cqh.mapper;
import com.cqh.entity.AccountInfo;
import org.apache.ibatis.annotations.Select;
import java.util.List;
public interface AccountInfoMapper {
@Select("select * from account_info")
List selectAll();
} 
6、编写service接口和实现类
package com.cqh.service;
import com.cqh.entity.AccountInfo;
import java.util.List;
public interface AccountInfoService {
List getAll();
} 
package com.cqh.service.impl;
import com.cqh.entity.AccountInfo;
import com.cqh.mapper.AccountInfoMapper;
import com.cqh.service.AccountInfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class AccountInfoServiceImpl implements AccountInfoService {
@Autowired
private AccountInfoMapper accountInfoMapper;
public List getAll() {
return accountInfoMapper.selectAll();
}
} 
7、编写控制器
package com.cqh.controller;
import com.cqh.entity.AccountInfo;
import com.cqh.service.AccountInfoService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@RestController
@RequestMapping("/accountInfo")
public class AccountInfoController {
@Autowired
private AccountInfoService accountInfoService;
@GetMapping("/getAll")
public List getAll(){
return accountInfoService.getAll();
}
} 
使用注解方式搭建SSM
1、创建Web项目入口配置类替换web.xml
package com.cqh.config;
import org.springframework.web.filter.CharacterEncodingFilter;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
import javax.servlet.Filter;
public class ServletConfig extends AbstractAnnotationConfigDispatcherServletInitializer {
//加载spring配置类
@Override
protected Class[] getRootConfigClasses() {
return new Class[]{SpringConfig.class};
}
//加载springmvc配置类
@Override
protected Class[] getServletConfigClasses() {
return new Class[]{SpringMvcConfig.class};
}
//指定spring要管哪些地址
//设置SpringMVC请求地址拦截规则
/*
/所有地址
*/
@Override
protected String[] getServletMappings() {
return new String[]{"/"};
}
//设置post请求中文乱码过滤器
@Override
protected Filter[] getServletFilters() {
CharacterEncodingFilter filter = new CharacterEncodingFilter();
filter.setEncoding("utf-8");
return new Filter[]{filter};
}
}
2、创建SpringMVC配置类替换springmvc.xml
package com.cqh.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
//表明这是配置类
@Configuration
//开启包扫描
@ComponentScan("com.cqh.controller")
//开启mvc注解驱动
@EnableWebMvc
public class SpringMvcConfig {
}
3、创建SpringConfig配置类替换applicationContext.xml
package com.cqh.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Import;
import org.springframework.transaction.annotation.EnableTransactionManagement;
//表明这是配置类
@Configuration
//开启包扫描
@ComponentScan("com.cqh.service")
//开启事务平台管理器
@EnableTransactionManagement
//引入数据库配置类
@Import({MybatisConfig.class,JdbcConfig.class})
public class SpringConfig {
}
4、创建JdbcConfig配置类
package com.cqh.config;
import com.alibaba.druid.pool.DataSourceClosedException;
import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.PropertySource;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;
import javax.sql.DataSource;
//从resources下引入jdbc.properties
@PropertySource("classpath:jdbc.properties")
public class JdbcConfig {
@Value("${jdbc.driver}")
//把配置文件中的jdbc.driver对应的字符串值 附值给 被修饰前的变量
private String driver;
@Value("${jdbc.url}")
private String url;
@Value("${jdbc.username}")
private String username;
@Value("${jdbc.password}")
private String password;
//数据源
@Bean
public DataSource dataSource(){
DruidDataSource dataSource = new DruidDataSource();
dataSource.setDriverClassName(driver);
dataSource.setUrl(url);
dataSource.setUsername(username);
dataSource.setPassword(password);
return dataSource;
}
//平台事务管理器
@Bean
public PlatformTransactionManager transactionManager(DataSource dataSource){
//创建数据事务管理器
DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager();
//设置事务源
dataSourceTransactionManager.setDataSource(dataSource);
return dataSourceTransactionManager;
}
}
5、创建MybatisConfig配置类
package com.cqh.config;
import org.apache.ibatis.session.Configuration;
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 sqlSessionFactoryBean(DataSource dataSource){
SqlSessionFactoryBean factoryBean= new SqlSessionFactoryBean();
//设置数据源
factoryBean.setDataSource(dataSource);
//给实体类设置别名
factoryBean.setTypeAliasesPackage("com.cqh.entity");
//开启驼峰命名
Configuration configuration = new Configuration();
//下划线转驼峰
configuration.setMapUnderscoreToCamelCase(true);
factoryBean.setConfiguration(configuration);
return factoryBean;
}
@Bean
public MapperScannerConfigurer mapperScannerConfigurer(){
MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
//扫描mapper所在的包
mapperScannerConfigurer.setBasePackage( "com.cqh.mapper");
return mapperScannerConfigurer;
}
}
Xml方式
1、配置jdbc.properties
2、applicationContext.xml
3、 spring-mvc.xml
4、web.xml
Archetype Created Web Application
contextConfigLocation
classpath:applicationContext*.xml
org.springframework.web.context.ContextLoaderListener
dispatcherServlet
org.springframework.web.servlet.DispatcherServlet
contextConfigLocation
classpath:spring-mvc.xml
1
dispatcherServlet
/
characterEncodingFilter
org.springframework.web.filter.CharacterEncodingFilter
encoding
utf-8
characterEncodingFilter
dispatcherServlet
测试效果
