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瑞吉外卖项目Day2———完善登录问题、员工功能

网友: 文章列表 2024-03-21 16:48:02

瑞吉外卖项目Day2———完善登录问题、员工功能

创建过滤器类(filter)

package com.study.filter;import com.alibaba.fastjson.JSON;
import com.study.common.R;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.AntPathMatcher;import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;//注解配置拦截器名称（类名），拦截路径"/*"
@WebFilter(filterName = "LoginCheckFilter",urlPatterns = "/*")
@Slf4j
public class LoginCheckFilter implements Filter {//1.路径匹配器，支持通配符public static  final AntPathMatcher PATH_MATCHER=new AntPathMatcher();@Overridepublic void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {HttpServletRequest request=(HttpServletRequest) servletRequest;HttpServletResponse response=(HttpServletResponse) servletResponse;//1.获取本次请求的URIString requestURI =request.getRequestURI();//2.不需要处理的路径定义String[] urls=new String[]{"/employee/login","/employee/logout","backend/","front/"};//3.判断此次请求是否需要处理boolean flag=check(urls,requestURI);//4.如果不需要处理，直接放行if(flag){log.info("本次请求{}不需要处理",requestURI);filterChain.doFilter(request,response);return;}//4.判断登录状态，如果已经登录，则直接放行//查看浏览器session里面是否存在idif(request.getSession().getAttribute("employee")!=null){log.info("用户已经登录，用户id为：{}",request.getSession().getAttribute("employee"));filterChain.doFilter(request,response);return;}log.info("用户未登录");//5.如果未登录则返回未登录结果，通过输出流方式向客户端响应数据response.getWriter().write(JSON.toJSONString(R.error("NOTLOGIN")));return;}/* 检查此次请求是否需要放行* @param urls* @param requestURI* @return*/public  boolean check(String[] urls,String requestURI){for(String url:urls){boolean match=PATH_MATCHER.match(url,requestURI);if(match){return true;}}return false;}
}

新增员工(Controller)

[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-yirUoxB9-1679626714687)
瑞吉外卖项目Day2———完善登录问题、员工功能

在Controller包中的EmployeeController添加如下方法：

/* 新增员工* @param request* @param employee* @return*/@PostMappingpublic R<String> save(HttpServletRequest request,@RequestBody Employee employee){log.info("新增员工，员工信息{}",employee.toString());//设置初始密码为123456并且利用m5加密处理employee.setPassword(DigestUtils.md5DigestAsHex("123456".getBytes()));employee.setCreateTime(LocalDateTime.now());employee.setUpdateTime(LocalDateTime.now());//获取当前登录用户的idLong empId =(Long) request.getSession().getAttribute("employee");//设置id和修改idemployee.setCreateUser(empId);employee.setUpdateUser(empId);employeeService.save(employee);return R.success("新增员工成功");}

分页查询

1.创建MybatisPlusConfig类配置分页插件

package com.study.config;import com.baomidou.mybatisplus.extension.plugins.MybatisPlusInterceptor;
import com.baomidou.mybatisplus.extension.plugins.inner.PaginationInnerInterceptor;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;/* 配置MP的分页插件*/
@Configuration
public class MybatisPlusConfig {@Beanpublic MybatisPlusInterceptor mybatisPlusInterceptor(){MybatisPlusInterceptor mybatisPlusInterceptor = new MybatisPlusInterceptor();mybatisPlusInterceptor.addInnerInterceptor(new PaginationInnerInterceptor());return mybatisPlusInterceptor;}
}

2.在EmployeeController增加分页查询方法

   @GetMapping("/page")public R<Page> page(int page,int pageSize,String name){log.info("page={},pageSize ={} name={}",page,pageSize,name);//构造分页构造器Page pageInfo=new Page(page,pageSize);//构造条件构造器LambdaQueryWrapper<Employee> queryWrapper=new LambdaQueryWrapper<>();//添加过滤条件queryWrapper.like(!StringUtils.isEmpty(name),Employee::getName,name);//添加排序条件queryWrapper.orderByDesc(Employee::getUpdateTime);//执行查询employeeService.page(pageInfo,queryWrapper);return R.success(pageInfo);}

启用禁止员工

1.前端代码展示

瑞吉外卖项目Day2———完善登录问题、员工功能

2.增加修改和查询数据方法(controller)

/* 根据id修改员工信息* @param request* @param employee* @return*/@PutMappingpublic R<String> update(HttpServletRequest request,@RequestBody Employee employee){log.info(employee.toString());long empId=(long)request.getSession().getAttribute("employee");//设置更新时间employee.setUpdateTime(LocalDateTime.now());//更新用户idemployee.setUpdateUser(empId);//根据id进行更新employeeService.updateById(employee);return R.success("员工信息修改成功");}

功能无法实现[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-5npd8GPw-1679626714688)

瑞吉外卖项目Day2———完善登录问题、员工功能

原因：客户端将id(long)传递给服务器，服务器无法保留id的精确度(只能保留到前16类，后面三位采取四舍五入的方式保留226–>200)

1.解决：创建JackSonObjectMapper类(common)

package com.study.common;import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.ToStringSerializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.deser.LocalTimeDeserializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
import com.fasterxml.jackson.datatype.jsr310.ser.LocalTimeSerializer;
import java.math.BigInteger;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import static com.fasterxml.jackson.databind.DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES;/* 对象映射器:基于jackson将Java对象转为json，或者将json转为Java对象* 将JSON解析为Java对象的过程称为 [从JSON反序列化Java对象]* 从Java对象生成JSON的过程称为 [序列化Java对象到JSON]*/
public class JacksonObjectMapper extends ObjectMapper {public static final String DEFAULT_DATE_FORMAT = "yyyy-MM-dd";public static final String DEFAULT_DATE_TIME_FORMAT = "yyyy-MM-dd HH:mm:ss";public static final String DEFAULT_TIME_FORMAT = "HH:mm:ss";public JacksonObjectMapper() {super();//收到未知属性时不报异常this.configure(FAIL_ON_UNKNOWN_PROPERTIES, false);//反序列化时，属性不存在的兼容处理this.getDeserializationConfig().withoutFeatures(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);SimpleModule simpleModule = new SimpleModule().addDeserializer(LocalDateTime.class, new LocalDateTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT))).addDeserializer(LocalDate.class, new LocalDateDeserializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT))).addDeserializer(LocalTime.class, new LocalTimeDeserializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT))).addSerializer(BigInteger.class, ToStringSerializer.instance).addSerializer(Long.class, ToStringSerializer.instance).addSerializer(LocalDateTime.class, new LocalDateTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_TIME_FORMAT))).addSerializer(LocalDate.class, new LocalDateSerializer(DateTimeFormatter.ofPattern(DEFAULT_DATE_FORMAT))).addSerializer(LocalTime.class, new LocalTimeSerializer(DateTimeFormatter.ofPattern(DEFAULT_TIME_FORMAT)));//注册功能模块 例如，可以添加自定义序列化器和反序列化器this.registerModule(simpleModule);}
}

2.在WebMvcConfig中添加如下方法扩张MVC框架消息转换器

/* 扩张MVC框架消息转换器* @param converters*/@Overrideprotected void extendMessageConverters(List<HttpMessageConverter<?>> converters) {//创建消息转换器MappingJackson2HttpMessageConverter messageConverter=new MappingJackson2HttpMessageConverter();//设置对象转换器，底层使用JackSon将java转为jsonmessageConverter.setObjectMapper(new JacksonObjectMapper());//将上面的消息转换器追加到MVC框架的转换器集合中,index越小越优先使用converters.add(0,messageConverter);}

编辑员工

瑞吉外卖项目Day2———完善登录问题、员工功能

add.html获取客户端编辑客户的id，并将id传到服务端。

服务端接受请求查询员工信息，并以json格式响应到页面。

服务端接收json数据，并将员工信息回显。再次点击保存按钮，

将员工信息传到服务器中，并且调用save方法进行保存

在EmployeeController类中添加getById方法查询数据

  @GetMapping("/{id}")public R<Employee> getById(@PathVariable long id){log.info("根据id查询员工信息...");Employee employee=employeeService.getById(id);if(employee!=null){return R.success(employee);}return R.error("没有查询到对应员工信息");}

异常处理

1.创建异常类进行全局异常捕获

瑞吉外卖项目Day2———完善登录问题、员工功能

2.创建GlobalExceptionHandler 类

package com.study.common;import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;import java.sql.SQLIntegrityConstraintViolationException;@ControllerAdvice(annotations = {RestController.class, Controller.class})
@ResponseBody
@Slf4j
public class GlobalExceptionHandler {/* 异常处理方法* @param ex* @return*/@ExceptionHandler(SQLIntegrityConstraintViolationException.class)public R<String> exceptionHandler(SQLIntegrityConstraintViolationException ex) {log.error(ex.getMessage());if (ex.getMessage().contains("Duplicate entry")) {String[] split = ex.getMessage().split(" ");String msg = split[2] + "已存在";R.error(msg);}return R.error("未知错误");}
}
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