spring 接口校验参数(自定义注解)

　　1. 注解类

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Target(ElementType.FIELD)
@Retention(RetentionPolicy.RUNTIME)
public @interface Pojo {

    int minLength() default 0;
    int maxLength() default 0;
    Class type() default String.class;
    boolean empty() default true;
}

　　2.Pojo

　　　　引入了lombok包

import lombok.AccessLevel;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

/**
 * 
 * @ClassName:  EBillRecourseBean   
 * @Description:追索功能 vo
 * @author: zhouyy
 * @date:   2019年10月9日 下午3:44:11   
 *
 */
@Data
@NoArgsConstructor
@AllArgsConstructor(access = AccessLevel.PUBLIC)
public class EBillRecourseBean {

    private EBillRequestHeader header;
    
//    private String testName;
//    private String testCode;
    
    /**  追索通知(bms4ebank0019)  **/
    @Pojo(empty=false,minLength=20)
    private String custCmonId;//客户组织机构代码
    private String custNo;//客户号
    private String custAcct;//客户账号
    private String custAcctSvcr;//客户账号开户行行号
    private String drftNo;//电子票据号码
    private String rcrsDt;//追索申请日期
    private String rcrsTp;//追索类型    RT00拒付追索
    private String amt;//追索金额
    /** 选填  **/
    private String rcrsRsnCd;//追索理由代码  选填   非拒付追索时填写 【RC00承兑人被依法宣告破产/RC01承兑人因违法被责令终止活动】
    /** 选填  **/
    private String reqRmrk;//追索通知备注  选填
    private String rcvNm;//被追索人名称
    private String rcvAcct;//被追索人账号
    private String rcvAcctSvcr;//被追索人开户行行号
    private String rcvCmonId;//被追索人组织机构代码
    private String eSgnt;//电子签名
    
    
}

　　3. BaseController

　　　　接口需要继承的controller类

import java.lang.reflect.Field;
import java.util.HashMap;
import java.util.Map;

import com.ebilloperate.util.Pojo;

public class BaseController {
    
    public Map valid(Object bean){
        Field[] fileds = bean.getClass().getDeclaredFields();
        Map map  = new HashMap();
        map.put("respCode", "0000");
        try {
            for (Field field : fileds) {
                if(field.isAnnotationPresent(Pojo.class)){
                    field.setAccessible(true);
                    Pojo annotation = field.getAnnotation(Pojo.class);
                    int maxLength = annotation.maxLength();
                    int minLength = annotation.minLength();
                    boolean empty = annotation.empty();
                    Object value = field.get(bean);
                    Class fieldType = field.getType();
                    String msg = "";
                    if(fieldType == String.class){
                        if(!empty){
                            if(value == null || "".equals(value.toString().trim())){
                                msg = field.getName()+"不能为空！";
                            }else
                            if(maxLength >0 && value.toString().length() >maxLength){
                                msg = field.getName()+"超长！";
                            }else
                            if(minLength >0 && value.toString().length() <minLength){
                                msg = field.getName()+"过短！";
                            }
                        }
                        if(!"".equals(msg)){
                            map.put("respMsg", msg);
                            return map;
                        }
                    }
                }
            }
        } catch (SecurityException | IllegalArgumentException | IllegalAccessException e) {
            e.printStackTrace();
            map.put("respMsg", "接口错误");
            return map;
        }
        return null;
    }
}

　　4.具体的接口controller类

package com.ebilloperate.features.web.controller;

import java.util.HashMap;
import java.util.Map;
import java.util.UUID;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import com.common.utils.StringUtil;
import com.ebilloperate.features.pojo.EBillRecourseBean;
import com.ebilloperate.features.service.EBillRecourseService;
import com.bytter.framework.log.FeaturesLog;

/**
 * 
 * @ClassName:  EBillRecourceController   
 * @Description:电票追索交易类
 *                 追索通知 
 *                 同意清偿申请 
 *                 同意清偿应答（签收） 
 * @author: zhouyy
 * @date:   2019年10月9日 下午3:25:47   
 *
 */
@RestController
@RequestMapping(value="/eBillRecourseTrade")
public class EBillRecourseController extends BaseController{
    protected FeaturesLog logger = new FeaturesLog(EBillRecourseController.class.getName());
    
    
    /**
     * 
     * 
@Description: 追索通知
       
     * @Title NoticeOfRecourse
     * @author zhouyy
     * @param bean
     * @return
     * @date: 2019年10月9日 下午3:45:33
     */
    @RequestMapping(value="/test", method=RequestMethod.POST,produces="application/json;charset=UTF-8")
    public Map test(@RequestBody EBillRecourseBean bean){
        Map map = valid(bean);
        if(map != null){
            return map;
        }
        //之前要做的
//        Map returnMap = eBillRecourseService.doNoticeOfRecourse(bean);
        Map returnMap = new HashMap();
        //之后要做的
        returnMap.put("respCode", "0001");
        returnMap.put("respMsg", "请求成功！Bytter接口返回随机字符串:"+UUID.randomUUID().toString().replaceAll("-", ""));
        
        if(StringUtil.isBlank(bean.getCustCmonId()) || bean.getCustCmonId().length() >10){
            returnMap.put("respCode", "0000");
            returnMap.put("respMsg", "请求参数有误！参数【custCmonId】");
            return returnMap;
        }
        if(StringUtil.isBlank(bean.getCustNo()) || bean.getCustNo().length() >32){
            returnMap.put("respCode", "0000");
            returnMap.put("respMsg", "请求参数有误！参数【custNo】");
            return returnMap;
        }
        
        for (Object key : returnMap.keySet()) {
            System.out.println("key="+key+";value="+returnMap.get(key));
        }
        return returnMap;
    }
    


}

上面采用的是普通的继承方法。亦可用spring的aop，在进入controller之前进行校验,具体的controller就不用继承、方法中也不需要调用父类方法

　　5.aop类

package com.ebilloperate.util;

import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import com.framework.log.FeaturesLog;

@Component
@Aspect
public class ControllerAspect {
    protected FeaturesLog logger = new FeaturesLog(ControllerAspect.class.getName());
    
    //对包下所有的controller结尾的类的所有方法增强
//    private final String executeExpr = "execution(* com.bytter.ebilloperate.features.web..*Controller.*(..))";
    private final String executeExpr = "execution(* com.bytter.ebilloperate.features.web..*controller.*(..))";
    
    
    /**
     * @param joinPoint:
     * @throws Exception 
     * @Author: TheBigBlue
     * @Description: 环绕通知，拦截controller，输出请求参数、响应内容和响应时间
     * @Date: 2019/6/17
     * @Return:
     **/
    @Around(executeExpr)
    public Object processLog(ProceedingJoinPoint joinPoint) throws Exception {
        Method method = ((MethodSignature) joinPoint.getSignature()).getMethod();
        Class returnc = method.getReturnType();
        //获取参数
        Object[] args = joinPoint.getArgs();
        //接口参数校验。 必填、长度、格式==
        for (Object bean : args) {
            String msg = BytterAnnotation.PojoAnnotation(bean);
            if(!"".equals(msg)){
                Map returnMap = new HashMap();
                returnMap.put("respMsg", msg);
                returnMap.put("respCode", "0000");
                return returnMap;
            }
        }
        //获取方法名称
        String methodName = method.getName();
        //获取参数名称
//        LocalVariableTableParameterNameDiscoverer paramNames = new LocalVariableTableParameterNameDiscoverer();
//        String[] params = paramNames.getParameterNames(method);
       
        Object resObj = null;
        try {
            //执行原方法
            resObj = joinPoint.proceed(args);
        } catch (Throwable e) {
            logger.error(methodName + "方法执行异常!");
            throw new Exception(e);
        }
        return resObj;
    }
}

　　6.注解解析类

package com.ebilloperate.util;

import java.lang.reflect.Field;

public class BytterAnnotation {

    
    public static String PojoAnnotation(Object bean) throws IllegalArgumentException, IllegalAccessException{
        Field[] fileds = bean.getClass().getDeclaredFields();
        for (Field field : fileds) {
            if(field.isAnnotationPresent(Pojo.class)){
                field.setAccessible(true);
                Pojo annotation = field.getAnnotation(Pojo.class);
                int maxLength = annotation.maxLength();
                int minLength = annotation.minLength();
                boolean empty = annotation.empty();
                Object value = field.get(bean);
                Class fieldType = field.getType();
                if(fieldType == String.class){
                    if(!empty){
                        if(value == null || "".equals(value.toString().trim())){
                            return field.getName()+"不能为空！";
                        }
                        if(maxLength >0 && value.toString().length() >maxLength){
                            return field.getName()+"超长！";
                        }
                        if(minLength >0 && value.toString().length() <minLength){
                            return field.getName()+"过短！";
                        }
                    }
                }
            }
        }
        return "";
    }
}