近期做一个接口。接受外系统的报文，通过XStream转换成java对象以后。须要对当中的字段做格式校验。
要求例如以下：
传统的方式是硬编码校验。可是对于field非常多的情况。代码量暴增。easy出错。
String storeCode = uHeader.getStoreCode();
if (StringUtils.isNotBlank(storeCode)) {
ParamsUtil.getInstance().checkStrParam(result, storeCode, "抬头-參考订单门店号[storeCode]", LSPConstants.NUM_TEN);
if (!result.isSuccess()) {
return result;
}
}
String routing = uHeader.getRouting();
if (StringUtils.isNotBlank(routing)) {
ParamsUtil.getInstance().checkStrParam(result, routing, "抬头-路线[routing]", LSPConstants.NUM_SIX);
if (!result.isSuccess()) {
return result;
}
}
String areaDeliBusSysId = uHeader.getAreaDeliBusSysId();
if (StringUtils.isNotBlank(areaDeliBusSysId)) {
ParamsUtil.getInstance().checkStrParam(result, areaDeliBusSysId, "抬头-辖区内配送班车系统编号 [areaDeliBusSysId]",
LSPConstants.NUM_TEN);
if (!result.isSuccess()) {
return result;
}
}
String transBusSysId = uHeader.getTransBusSysId();
if (StringUtils.isNotBlank(transBusSysId)) {
ParamsUtil.getInstance().checkStrParam(result, transBusSysId, "抬头-联运班车系统编号[transBusSysId]",
LSPConstants.NUM_TEN);
if (!result.isSuccess()) {
return result;
}
}
String nostopBusSysId = uHeader.getNostopBusSysId();
if (StringUtils.isNotBlank(nostopBusSysId)) {
ParamsUtil.getInstance().checkStrParam(result, nostopBusSysId, "抬头-直达班车班车编号[nostopBusSysId]",
LSPConstants.NUM_TEN);
if (!result.isSuccess()) {
return result;
}
}
String speBusSysId = uHeader.getSpeBusSysId();
if (StringUtils.isNotBlank(speBusSysId)) {
ParamsUtil.getInstance().checkStrParam(result, speBusSysId, "抬头-穿梭班车系统编号1[speBusSysId]",
LSPConstants.NUM_TEN);
if (!result.isSuccess()) {
return result;
}
}而我更希望的方式是通过对字段添加注解，由系统自己主动校验，如：
Pojo OmsTaskHead.java：
public class OmsTaskHead {
@FieldNote(name = "參考订单门店号", type = FvEnum.STRING, regex = Regexs.letterAndDigit, isNullAble = true, length = 10)
private String storeCode; // 參考订单门店号
@FieldNote(name = "路线", type = FvEnum.STRING, regex = Regexs.letterAndDigit, length = 6)
private String routing; // 路线
@FieldNote(name = "辖区内配送班车系统编号", type = FvEnum.STRING, regex = Regexs.letterAndDigit, length = 10)
private String areaDeliBusSysId; // 辖区内配送班车系统编号
@FieldNote(name = "联运班车系统编号", type = FvEnum.STRING, regex = Regexs.letterAndDigit, length = 10)
private String transBusSysId; // 联运班车系统编号
@FieldNote(name = "直达班车班车编号", type = FvEnum.STRING, regex = Regexs.letterAndDigit, length = 10)
private String nostopBusSysId; // 直达班车班车编号
@FieldNote(name = "穿梭班车系统编号1", type = FvEnum.STRING, regex = Regexs.letterAndDigit, length = 10)
private String speBusSysId; // 穿梭班车系统编号1
@FieldNote(name = "联运班车发车日期", type = FvEnum.DATE_STR, regex = Regexs.yyyyMMdd, length = 8)
private String transBusDate; // 联运班车发车日期
@FieldNote(name = "辖区班车发车日期", type = FvEnum.DATE_STR, regex = Regexs.yyyyMMdd, length = 8)
private String areaDeliBusDate; // 辖区班车发车日期
@FieldNote(name = "直达班车发车日期", type = FvEnum.DATE_STR, regex = Regexs.yyyyMMdd, length = 8)
private String nonstopBusDate; // 直达班车发车日期
//getter and setter methods
}
自己定义注解 FieldNote.java:
package com.validate.intf;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
import com.validate.holder.FvEnum;
@Target({ ElementType.FIELD })
@Retention(RetentionPolicy.RUNTIME)
public @interface FieldNote {
/**
* 名称
* @return
*/
String name();
/**
* 类型
* @return
*/
FvEnum type();
/**
* 能否够为空
* @return
*/
boolean isNullAble() default true;
/**
* 格式，能够是正则，默觉得空字符串
* @return
*/
String regex() default "";
/**
* 长度(String)
* @return
*/
int length() default -1;
}
FvEnum.java(field validator enum) 字段校验方法集合。定义了不同类型field的校验方式:
package com.validate.holder;
import com.validate.ResultVO;
import com.validate.intf.FieldNote;
import com.validate.intf.IValidator;
/**
* @author 15041965 2015-06-09
*
*/
public enum FvEnum {
/*
* CHAR, BOOL, INT, LONG, DOUBLE, FLOAT,
*/
DATE_STR(FieldValidatorHolder.DATE_STR),
STRING(FieldValidatorHolder.STRING);
@SuppressWarnings("rawtypes")
private FvEnum(IValidator validator) {
this.validator = validator;
}
@SuppressWarnings("rawtypes")
private IValidator validator;
@SuppressWarnings("unchecked")
public <T> ResultVO validate(FieldNote fn,String fieldName, T fieldVal, ResultVO resultVO) {
return validator.validate(fn,fieldName,fieldVal, resultVO);
}
}
IValidator.java:
package com.validate.intf;
import com.validate.ResultVO;
/**
* @author 15041965 2015-06-09
*
*/
public interface IValidator<T> {
ResultVO validate(FieldNote fv,String fieldName,T fieldVal,ResultVO resultVO);
}
ResultVO.java 校验结果载体:
package com.validate;
import java.util.Collection;
import java.util.HashSet;
import java.util.Set;
/**
* 方法运行 结果 封装对象
*
*/
public class ResultVO {
private boolean success = true;// 返回标识
private Set<String> errorCodes; // 错误消息代码
public ResultVO() {
}
public boolean isSuccess() {
return success;
}
public void setSuccess(boolean success) {
this.success = success;
}
public Set<String> getErrorCodes() {
if (null == errorCodes) {
errorCodes = new HashSet<String>();
}
return errorCodes;
}
public void addError(String errorCode) {
if (errorCode == null || "".equals(errorCode.trim())) {
return;
}
if (!getErrorCodes().contains(errorCode)) {
getErrorCodes().add(errorCode);
}
success = false;
}
public void addErrors(Collection<String> errors) {
getErrorCodes().addAll(errors);
success = false;
}
public String getErrorStr() {
String str = errorCodes.toString();
return str.substring(1, str.length() - 1);
}
}
FieldValidatorHolder.java 和 FvEnum.java相应。是FvEnum.java里面各校验方式的详细实现持有类:
package com.validate.holder;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.springframework.util.StringUtils;
import com.validate.ResultVO;
import com.validate.intf.FieldNote;
import com.validate.intf.IValidator;
/**
* @author 15041965 2015-06-09
*
*/
public class FieldValidatorHolder {
public static final IValidator<String> STRING = newStringVal();
public static final IValidator<String> DATE_STR = new IValidator<String>() {
public ResultVO validate(FieldNote fv, String fieldName,
String fieldVal, ResultVO resultVO) {
resultVO = checkNullAndLen(fv, fieldName, fieldVal, resultVO);
if (!resultVO.isSuccess()) {
return resultVO;
}
if (!StringUtils.isEmpty(fieldVal)
&& !StringUtils.isEmpty(fv.regex())) {
if (!validateDate(fieldVal, fv.regex())) {
resultVO.addError(fv.name() + "[" + fieldName + "]值["
+ fieldVal + "]日期不合法或不能匹配格式 " + fv.regex());
return resultVO;
}
}
return resultVO;
}
};
private static IValidator<String> newStringVal() {
IValidator<String> validator = new IValidator<String>() {
public ResultVO validate(FieldNote fv, String fieldName,
String fieldVal, ResultVO resultVO) {
resultVO = checkNullAndLen(fv, fieldName, fieldVal, resultVO);
if (!resultVO.isSuccess()) {
return resultVO;
}
if (!StringUtils.isEmpty(fieldVal)
&& !StringUtils.isEmpty(fv.regex())
&& !fieldVal.matches(fv.regex())) {
resultVO.addError(fv.name() + "[" + fieldName + "]值["
+ fieldVal + "]不能匹配格式 " + fv.regex() + " ");
return resultVO;
}
return resultVO;
}
};
return validator;
}
protected static ResultVO checkNullAndLen(FieldNote fv, String fieldName,
String fieldVal, ResultVO resultVO) {
if (StringUtils.isEmpty(fieldVal)) {
if (!fv.isNullAble()) {
resultVO.addError(fv.name() + "[" + fieldName + "]为空！");
}
return resultVO;
}
if (fv.length() > 0 && (fieldVal.length() > fv.length())) {
resultVO.addError(fv.name() + "[" + fieldName + "]长度("
+ fieldVal.length() + ")超过限制(" + fv.length() + ")");
return resultVO;
}
return resultVO;
}
public static boolean validateDate(String dateStr, String pattern) {
try {
SimpleDateFormat dateFormat = new SimpleDateFormat(pattern);
Date date = dateFormat.parse(dateStr);
String pStr = dateFormat.format(date);
return pStr.equals(dateStr);
} catch (ParseException e) {
return false;
}
}
}
測试Main方法：
public static void main(String[] args) {
OmsTaskHead head = new OmsTaskHead();
head.setRouting("555555");
head.setAreaDeliBusSysId("busiId1234");
head.setNostopBusSysId("not010101");
head.setSpeBusSysId("busId0101");
head.setTransBusSysId("trans0909");
head.setAreaDeliBusDate("20150640");
head.setNonstopBusDate("20150610");
head.setStoreCode("20150610");
head.setTransBusDate("20150610");
ResultVO resultVO = ObjFieldValUtil.validate(head);
if(resultVO.isSuccess()){
System.out.println("校验成功！");
} else {
System.out.println(resultVO.getErrorStr());
}
}执行结果：
这样是不是非常方便，qq:1773240270 欢迎交流
