今天我们讲解的是Http请求前后监听工具
首先得创建一个类用来做处理:HttpInterceptor.class:
package cn.oyc.common; import cn.oyc.util.JsonMapper;import lombok.extern.slf4j.Slf4j;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.web.servlet.ModelAndView;import org.springframework.web.servlet.handler.HandlerInterceptorAdapter; import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import java.util.Map; @Slf4jpublic class HttpInterceptor extends HandlerInterceptorAdapter { private final Logger logger = LoggerFactory.getLogger(HttpInterceptor.class); private static final String START_TIME = "requestStartTime"; @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { String url = request.getRequestURL().toString(); Map parameterMap = request.getParameterMap(); logger.info("request start. utl:{},params:{}",url, JsonMapper.obj2String(parameterMap)); long start = System.currentTimeMillis(); request.setAttribute(START_TIME,start); return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {// String url = request.getRequestURL().toString();// long start = (Long) request.getAttribute(START_TIME);// long end = System.currentTimeMillis();// logger.info("request finished. utl:{},cost:{}",url, end - start); } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { String url = request.getRequestURL().toString(); long start = (Long) request.getAttribute(START_TIME); long end = System.currentTimeMillis(); logger.info("request completed. utl:{},cost:{}",url, end - start); }}
做完这些别忘记配置一下spring-servlet.xml,配置一段bean:
<mvc:interceptors> <bean class="cn.oyc.common.HttpInterceptor"/> </mvc:interceptors>
接下来我们这个类就编写完了,大家要记住,这个类可以拦截我们系统的url,可以在url请求之前可以做些事情,然后在请求处理完之后依旧可以做一些事情,这里我们基本的工具就配置好了,接下来就是编写我们
的部门接口的一个实现了,跟着下面来:
首先在param包下编写一个部门类DeptParam:
package cn.oyc.param; import lombok.Getter; import lombok.Setter; import lombok.ToString; import org.hibernate.validator.constraints.Length; import org.hibernate.validator.constraints.NotBlank; import javax.validation.constraints.NotNull; @Getter @Setter @ToString public class DeptParam { private Integer id; @NotBlank(message = "部门名称不可以为空") @Length(max = 15,min = 2,message = "部门名称需要在2-15个字之间") private String name; private Integer parentId; @NotNull(message = "展示顺序不可以为空") private Integer seq; @Length(max = 150,message = "备注的长度需要在150个字以内") private String remark; }
在编写一个controller,SysDeptController:
package cn.oyc.controller; import cn.oyc.common.JsonData; import cn.oyc.param.DeptParam; import cn.oyc.service.SysDeptService; import lombok.extern.slf4j.Slf4j; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import javax.annotation.Resource; @Controller @RequestMapping("/sys/dept") @Slf4j public class SysDeptController { @Resource private SysDeptService sysDeptService; @RequestMapping("/save.json") public JsonData saveDept(DeptParam param){ sysDeptService.save(param); return JsonData.success(""); } }
在这之前我们还得创建他的Service:
package cn.oyc.service; import cn.oyc.dao.SysDeptMapper; import cn.oyc.entity.SysDept; import cn.oyc.exception.ParamException; import cn.oyc.param.DeptParam; import cn.oyc.util.BeanValidator; import cn.oyc.util.LevelUtil; import org.springframework.stereotype.Service; import javax.annotation.Resource; import java.util.Date; @Service public class SysDeptService { @Resource private SysDeptMapper sysDeptMapper; public void save(DeptParam param) { BeanValidator.check(param); if (checkExist(param.getParentId(),param.getName(),param.getId())){ throw new ParamException("同一层级下存在相同名称的部门"); } SysDept dept = SysDept.builder().name(param.getName()).parentId(param.getParentId()) .seq(param.getSeq()).remark(param.getRemark()).build(); dept.setLevel(LevelUtil.calculateLevel(getLevel(param.getParentId()),param.getParentId())); dept.setOperator("system");//TODO: dept.setOperateIp("127.0.0.1"); //TODO dept.setOperateTime(new Date()); sysDeptMapper.insertSelective(dept); } private boolean checkExist(Integer parentId,String deptName,Integer deptId){ // TODD: return true; } private String getLevel(Integer deptId){ SysDept dept = sysDeptMapper.selectByPrimaryKey(deptId); if (dept == null){ return null; } return dept.getLevel(); } }
在创建一个层级状态的类:
package cn.oyc.util; import org.apache.commons.lang3.StringUtils; public class LevelUtil { public final static String SEPARATOR = "."; public final static String ROOT = "0"; //0 //0.1 //0.1.2 //0.1.3 //0.4 public static String calculateLevel(String parentLevel,int parentId){ if (StringUtils.isBlank(parentLevel)){ return ROOT; }else{ return StringUtils.join(parentLevel,SEPARATOR,parentId); } } }
在我们的SysDept实体中添加注解
@Builder@NoArgsConstructor@AllArgsConstructor@ToString
原文地址:https://www.cnblogs.com/Myoyc/p/12239392.html
时间: 2024-11-08 14:38:27