JAVA手写注解示例

教研工具类

：
package com.cmbchina.ams.cloud.oms.common.util;

import com.alibaba.excel.annotation.ExcelProperty;
import com.alibaba.excel.context.AnalysisContext;
import com.cmbchina.ams.cloud.oms.common.validation.*;
import org.apache.commons.lang3.StringUtils;

import java.io.UnsupportedEncodingException;
import java.lang.reflect.Field;
import java.math.BigDecimal;
import java.util.Objects;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import static java.util.regex.Pattern.compile;

/**

• Excel导入字段校验

• @author IT007160 徐帆
  /
  public class ExcelImportValid {
  /*

  • Excel导入字段校验

  • @param object 校验的JavaBean 其属性须有自定义注解

  • @author IT007160 徐帆
    /
    public static void valid(Object object, AnalysisContext context) throws RuntimeException, UnsupportedEncodingException {
    Field[] fields = object.getClass().getDeclaredFields();
    for (Field field : fields) {
    //设置可访问
    field.setAccessible(true);
    //属性的值
    Object fieldValue = null;
    try {
    fieldValue = field.get(object);
    } catch (IllegalAccessException e) {
    throw new RuntimeException(String.format(“第%s行%s列-”+field.getAnnotation(ExcelValid.class).message()+“有误，请核实”, context.readRowHolder().getRowIndex() + 1,field.getAnnotation(ExcelProperty.class).index()+1));
    }
    //是否包含必填校验注解
    boolean isExcelValid = field.isAnnotationPresent(ExcelValid.class);
    if (isExcelValid && Objects.isNull(fieldValue)) {
    throw new RuntimeException( String.format(“第%s行%s列-”+field.getAnnotation(ExcelValid.class).message()+"，请核实", context.readRowHolder().getRowIndex() + 1,field.getAnnotation(ExcelProperty.class).index()+1));
    }
    //utf-8长度校验注解
    boolean isExcelUtfValid = field.isAnnotationPresent(ExcelUtfValid.class);
    if (isExcelUtfValid && Objects.nonNull(fieldValue)) {
    String cellStr = fieldValue.toString();
    int strLength = cellStr.getBytes(“UTF-8”).length;
    int length = field.getAnnotation(ExcelUtfValid.class).max();
    if (StringUtils.isNotBlank(cellStr) && strLength > length) {
    throw new RuntimeException( String.format(“第%s行%s列-”+field.getAnnotation(ExcelUtfValid.class).message()+"，请核实", context.readRowHolder().getRowIndex() + 1,field.getAnnotation(ExcelProperty.class).index()+1));
    }
    }
    //字符串中是否有汉字校验
    boolean isExcelChineseValid = field.isAnnotationPresent(ExcelChineseValid.class);
    if (isExcelChineseValid && Objects.nonNull(fieldValue)) {
    String cellStr = fieldValue.toString();
    Pattern p = compile("[\u4e00-\u9fa5]");
    Matcher m = p.matcher(cellStr);
    if (m.find()) {
    throw new RuntimeException( String.format(“第%s行%s列-”+field.getAnnotation(ExcelChineseValid.class).message()+"，请核实", context.readRowHolder().getRowIndex() + 1,field.getAnnotation(ExcelProperty.class).index()+1));
    }
    }
    //特殊字符校验
    boolean isExcelSpecialCharValid = field.isAnnotationPresent(ExcelSpecialCharValid.class);
    if (isExcelSpecialCharValid && Objects.nonNull(fieldValue)) {
    String cellStr = fieldValue.toString();
    Pattern p = compile("¹+KaTeX parse error: Expected 'EOF', got '}' at position 317: … } }̲ //GBK长度校验…");
    if (pattern.matcher(cellDecimal.toString()).matches()) {
    flag = true;
    }/
    int i =cellDecimal.compareTo(min);

             if ( cellDecimal.compareTo(min) <= 0 || cellDecimal.compareTo(max) >= 0 ) {
                 throw new RuntimeException(String.format("第%s行%s列-"+field.getAnnotation(ExcelDecimalValid.class).message()+"，请核实", context.readRowHolder().getRowIndex() + 1,field.getAnnotation(ExcelProperty.class).index()+1) );
             }
             BigDecimal bigDecimal = new BigDecimal(0.01);
             int a = cellDecimal.compareTo(new BigDecimal("0.01"));
             int b = cellDecimal.compareTo(bigDecimal);
    
             if ( cellDecimal.compareTo(new BigDecimal("0.01")) < 0  ) {
                 throw new RuntimeException(String.format("第%s行%s列-"+field.getAnnotation(ExcelDecimalValid.class).message()+"，请核实", context.readRowHolder().getRowIndex() + 1,field.getAnnotation(ExcelProperty.class).index()+1) );
             }
         } else {
             throw new RuntimeException(String.format("第%s行%s列-"+field.getAnnotation(ExcelDecimalValid.class).message()+"，不是小数数字类型请核实", context.readRowHolder().getRowIndex() + 1,field.getAnnotation(ExcelProperty.class).index()+1));
         }
     }
    

    }
    }
    private static boolean isBigDecimal(String decimal) {
    try {
    BigDecimal bd = new BigDecimal(decimal);
    return true;
    } catch (NumberFormatException e) {
    return false;
    }
    }
    }