基础三层架构的配置类以及基础实现(crud)
目录
com.itbignyi
config
DataSource
MapperConfig（方式1）
MapperConfigNew（方式2-推荐）
WebMvcConfig
ServiceConfig
SpringIoCInit
controller
service
serviceImpl
mapper
pojo
employee
utils
PageBean
R
resources
com/itbignyi/mapper
EmployeeMapper.xml
jdbc.propertise
logback.xml
mybatis-config.xml（方式1）
webapp
WEB-INF
views(包)
web.xml
pom.xml
com.itbignyi
config
DataSource
package com.itbignyi.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import javax.sql.DataSource;
/**
* 连接池配置类
*/
@Configuration
@PropertySource("classpath:jdbc.properties")
public class DataSourceConfig {
@Value("${jdbc.user}")
private String user;
@Value("${jdbc.password}")
private String password;
@Value("${jdbc.url}")
private String url;
@Value("${jdbc.driver}")
private String driver;
// druid连接池配置
@Bean
public DataSource dataSource() {
DruidDataSource dataSource = new DruidDataSource();
dataSource.setUsername(user);
dataSource.setPassword(password);
dataSource.setUrl(url);
dataSource.setDriverClassName(driver);
return dataSource;
}
}
MapperConfig（方式1）
package com.itbignyi.config;
import com.alibaba.druid.pool.DruidDataSource;
import org.apache.ibatis.annotations.Mapper;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import javax.sql.DataSource;
/**
* 持久层配置类：连接池，sqlSessionFactory,mapper代理对象
* 方式1.保留外部配置文件
* TODO:如果将dataSour和mybatis组件连接在一起，会触发@Value注解不生效的问题
* 原因就是mybatis的文件优先于@Value注解读取
* 解决：分开配置，写到不同的类中即可
*/
@Configuration
public class MappingConfig {
@Bean
// sqlSessionFactory 加入ioc容器
public SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource) {
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
sqlSessionFactoryBean.setDataSource(dataSource);
// 指定外部mybatis文件
Resource resource=new ClassPathResource("mybatis-config.xml");
// 外部
sqlSessionFactoryBean.setConfigLocation(resource);
return sqlSessionFactoryBean;
}
@Bean
// mapper代理对象加入到ioc容器
public MapperScannerConfigurer mapperScannerConfigurer() {
// Mapper代理工厂
MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
mapperScannerConfigurer.setBasePackage("com.itbignyi.mapper");
return mapperScannerConfigurer;
}
}
MapperConfigNew（方式2-推荐）
package com.itbignyi.config;
import com.alibaba.druid.support.logging.SLF4JImpl;
import com.github.pagehelper.PageInterceptor;
import org.apache.ibatis.logging.slf4j.Slf4jImpl;
import org.apache.ibatis.session.AutoMappingBehavior;
import org.mybatis.spring.SqlSessionFactoryBean;
import org.mybatis.spring.mapper.MapperScannerConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.io.ClassPathResource;
import org.springframework.core.io.Resource;
import javax.sql.DataSource;
import java.util.Properties;
/**
* 持久层配置类：连接池，sqlSessionFactory,mapper代理对象
* TODO:方式2
* 保留外部配置文件
* 全部mybatis的属性在代码中实现
*/
@Configuration
public class MappingConfigNew {
// sqlSessionFactory 加入ioc容器
@Bean
public SqlSessionFactoryBean sqlSessionFactory(DataSource dataSource) {
SqlSessionFactoryBean sqlSessionFactoryBean = new SqlSessionFactoryBean();
// 连接池
sqlSessionFactoryBean.setDataSource(dataSource);
// mybatis配置设置
org.apache.ibatis.session.Configuration configuration
= new org.apache.ibatis.session.Configuration();
// 驼峰命名
configuration.setMapUnderscoreToCamelCase(true);
// 记录日志
configuration.setLogImpl(Slf4jImpl.class);
// 自动映射
configuration.setAutoMappingBehavior(AutoMappingBehavior.FULL);
// 别名设置
sqlSessionFactoryBean.setTypeAliasesPackage("com.itbignyi.pojo");
// 添加插件
PageInterceptor pageInterceptor = new PageInterceptor();
Properties properties = new Properties();
properties.setProperty("helperDialect", "mysql");
pageInterceptor.setProperties(properties);
sqlSessionFactoryBean.addPlugins(pageInterceptor);
sqlSessionFactoryBean.setConfiguration(configuration);
return sqlSessionFactoryBean;
}
// mapper代理对象加入到ioc容器
@Bean
public MapperScannerConfigurer mapperScannerConfigurer() {
// Mapper代理工厂
MapperScannerConfigurer mapperScannerConfigurer = new MapperScannerConfigurer();
mapperScannerConfigurer.setBasePackage("com.itbignyi.mapper");
return mapperScannerConfigurer;
}
}
WebMvcConfig
package com.itbignyi.config;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.*;
/**
* 配置类
*/
@EnableWebMvc//json处理器 HandlerMapping和HandlerAdapter
@Configuration//配置类
@ComponentScan({"com.itbignyi.controller", "com.itbignyi.exceptionHandler"})//包扫描
public class MvcConfig implements WebMvcConfigurer {
// 静态资源处理
@Override
public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
configurer.enable();
}
// 视图解析器
@Override
public void configureViewResolvers(ViewResolverRegistry registry) {
registry.jsp("/WEB-INF/views/","jsp");
}
// 拦截器
@Override
public void addInterceptors(InterceptorRegistry registry) {
}
}
ServiceConfig
package com.itbignyi.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.TransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
import javax.sql.DataSource;
/**
* service,aop,tx
*/
@Configuration
@EnableAspectJAutoProxy
@EnableTransactionManagement
@ComponentScan("com.itbignyi.service")
public class ServiceConfig {
// 事务管理的实现
@Bean
public TransactionManager transactionManager(DataSource dataSource) {
DataSourceTransactionManager dataSourceTransactionManager = new DataSourceTransactionManager();
dataSourceTransactionManager.setDataSource(dataSource);
return dataSourceTransactionManager;
}
}
SpringIoCInit
package com.itbignyi.config;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
/**
* spring的初始化类
*/
public class SpringIoCInit extends AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected Class[] getRootConfigClasses() {
return new Class[]{DataSourceConfig.class, ServiceConfig.class, MappingConfigNew.class};
}
@Override
protected Class[] getServletConfigClasses() {
return new Class[]{MvcConfig.class};
}
@Override
protected String[] getServletMappings() {
return new String[]{"/"};
}
}
controller
package com.itbignyi.controller;
import com.itbignyi.pojo.Employee;
import com.itbignyi.service.EmployeeService;
import com.itbignyi.utils.R;
import jakarta.persistence.criteria.CriteriaBuilder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.*;
@RestController
@RequestMapping("emp")
@Slf4j
public class EmployeeController {
@Autowired
private EmployeeService employeeService;
@GetMapping("/{pageSize}/{currentPage}")
public R page(@PathVariable int pageSize,
@PathVariable int currentPage) {
R r=employeeService.page(pageSize,currentPage);
log.info("查询的数据为：{}",r);
return r;
}
@DeleteMapping("/{id}")
public R remove(@PathVariable Integer id) {
R r = employeeService.remove(id);
return r;
}
@PostMapping
public R save(@PathVariable @RequestBody Employee employee, BindingResult result) {
if (result.hasErrors()) {
return R.fail("参数为null，不能保存！");
}
R r = employeeService.save(employee);
return r;
}
@PutMapping
public R update(@PathVariable @RequestBody Employee employee, BindingResult result) {
if (result.hasErrors()) {
return R.fail("参数为null，不能修改！");
}
R r = employeeService.updata(employee);
return r;
}
}
service
package com.itbignyi.service;
import com.itbignyi.pojo.Employee;
import com.itbignyi.utils.R;
import java.util.List;
public interface EmployeeService {
R page(int pageSize, int currentPage);
R remove(Integer id);
R save(Employee employee);
R updata(Employee employee);
}
serviceImpl
package com.itbignyi.service.Impl;
import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.itbignyi.mapper.EmployeeMapper;
import com.itbignyi.pojo.Employee;
import com.itbignyi.service.EmployeeService;
import com.itbignyi.utils.PageBean;
import com.itbignyi.utils.R;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class EmployeeServiceImpl implements EmployeeService {
@Autowired
private EmployeeMapper employeeMapper;
@Override
public R page(int pageSize, int currentPage) {
// 分页
PageHelper.startPage(currentPage,pageSize);
// 查询
List employees = employeeMapper.queryList();
// 分页数据装配
PageInfo info=new PageInfo<>(employees);
// 装配pageBean
PageBean pageBean = new PageBean<>(currentPage,pageSize,info.getTotal(),info.getList());
R ok=R.ok(pageBean);
return ok;
}
@Override
public R remove(Integer id) {
int rows= employeeMapper.deleteById(id);
if (rows > 0) {
return R.ok(null);
}
return R.fail(null);
}
@Override
public R save(Employee employee) {
int rows= employeeMapper.insert(employee);
if (rows > 0) {
return R.ok(null);
}
return R.fail(null);
}
@Override
public R updata(Employee employee) {
if (employee.getId() == null) {
return R.fail("核心参数为null，无法修改！");
}
int rows = employeeMapper.update(employee);
if (rows > 0) {
return R.ok(null);
}
return R.fail(null);
}
}
mapper
package com.itbignyi.mapper;
import com.itbignyi.pojo.Employee;
import java.util.List;
public interface EmployeeMapper {
List queryList();
int deleteById(Integer id);
int insert(Employee employee);
int update(Employee employee);
}
pojo
employee
package com.itbignyi.pojo;
import lombok.Data;
@Data
public class Employee {
private Integer id;
private String title;
private Boolean completed;
}
utils
PageBean
package com.itbignyi.utils; import lombok.AllArgsConstructor; import lombok.Data; import lombok.NoArgsConstructor; import java.util.List; @Data @NoArgsConstructor @AllArgsConstructor public class PageBean{ private int currentPage;//当前页码 private int pageSize;//每页显示的数据量 private long total;//总数居条数 private List data;//当前页的数据集合 }
R
package com.itbignyi.utils;
public class R {
private int code = 200;//成功状态码
private boolean flag=true;//返回状态
private Object data;//返回具体数据
public static R ok(Object data) {
R r = new R();
r.data = data;
return r;
}
public static R fail(Object data) {
R r = new R();
r.code = 500;//错误码
r.flag=false;//错误状态
r.data = data;
return r;
}
public int getCode() {
return code;
}
public void setCode(int code) {
this.code = code;
}
public boolean isFlag() {
return flag;
}
public void setFlag(boolean flag) {
this.flag = flag;
}
public Object getData() {
return data;
}
public void setData(Object data) {
this.data = data;
}
}
resources
com/itbignyi/mapper
EmployeeMapper.xml
jdbc.propertise
jdbc.user=root jdbc.password=1234 jdbc.url=jdbc:mysql:///mybatis-example jdbc.driver=com.mysql.cj.jdbc.Driver
logback.xml
[%d{HH:mm:ss.SSS}][%-5leve][%thread][%logger][%smg]%n
mybatis-config.xml（方式1）
webapp
WEB-INF
views(包)
web.xml
pom.xml
4.0.0 com.itbignyi ssm-integration-part 1.0-SNAPSHOT pom ssm-integration-01 ssm-integration-02 org.springframework spring-context ${spring-context.version} jakarta.annotation jakarta.annotation-api ${jakarta.annotation-api.version} org.springframework spring-aop ${spring-aop.version} org.springframework spring-aspects ${spring-aspects.version} org.springframework spring-tx ${spring-tx.version} org.springframework spring-jdbc ${spring-jdbc.version} org.springframework spring-webmvc ${spring-webmvc.version} jakarta.platform jakarta.jakartaee-web-api ${jakarta.jakartaee-web-api.version} provided jakarta.servlet.jsp.jstl jakarta.servlet.jsp.jstl-api ${jakarta.servlet.jsp.jstl-api.version} com.fasterxml.jackson.core jackson-databind ${jackson-databind.version} org.hibernate.validator hibernate-validator ${hibernate-validator.version} org.hibernate.validator hibernate-validator-annotation-processor ${hibernate-validator-annotation-processor.version} org.mybatis mybatis ${mybatis.version} mysql mysql-connector-java ${mysql-connector-java.version} com.github.pagehelper pagehelper ${pagehelper.version} org.springframework spring-web ${spring-web.version} org.mybatis mybatis-spring ${mybatis-spring.version} ch.qos.logback logback-classic ${logback-classic.version} org.projectlombok lombok ${lombok.version} com.alibaba druid ${druid.version} 17 17 UTF-8 6.0.12 2.1.1 6.0.12 6.0.11 6.0.11 6.0.11 6.0.12 9.1.0 3.0.0 2.15.2 6.0.18.Final 8.0.1.Final 3.5.13 8.0.30 5.3.2 6.0.11 3.0.2 1.4.11 1.18.28 1.2.1