Spring MVC 基于AnnotationFormatterFactory接口实现自定义的规则

1、创建一个类来实现AnnotationFormatterFactory接口

代码:

package com.oukele.CustomAnnotation;

import com.oukele.model.CardId;
import org.springframework.format.AnnotationFormatterFactory;
import org.springframework.format.Parser;
import org.springframework.format.Printer;

import java.util.HashSet;
import java.util.Set;

public class MyFormatterAnnotation implements AnnotationFormatterFactory<FormId> {
    @Override
    public Set<Class<?>> getFieldTypes() {
        HashSet<Class<?>> types = new HashSet<>();
        types.add(CardId.class);
        return types;
    }
    @Override
    public Printer<?> getPrinter(FormId annotation, Class<?> fieldType) {
        return null;
    }

    @Override
    public Parser<?> getParser(FormId annotation, Class<?> fieldType) {
        return getFormatter(annotation);
    }
    private MyFormatter getFormatter(FormId annotation){
        MyFormatter myFormatter = new MyFormatter();
        //获取注解的值,并赋值
        myFormatter.setLanguage(annotation.value());
        return myFormatter;
    }

}
View Code

通过实现Formatter接口自定义自已的规则

 

代码:

package com.oukele.CustomAnnotation;

import com.oukele.model.CardId;
import org.springframework.format.Formatter;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

public class MyFormatter implements Formatter<CardId> {
    //字段
    private String language;
//    输出
    @Override
    public String print(CardId object, Locale locale) {
        return null;
    }
//  转换
    @Override
    public CardId parse(String text, Locale locale) throws ParseException {
        //获取传入的身份证号
        //然后截取对应的数字,给CardId的省份、出生日期、性别 赋值
        return new CardId(getProvince(text),getBirth(text),getSex(text));
    }

    private String getProvince(String car){
        return "暂无数据";
    }

    private Date getBirth(String car) throws ParseException {
        return new SimpleDateFormat("yyyyMMdd").parse(car.substring(6, 14));
    }

    private String getSex(String car) {

        if( language == null){
            // 17: 偶数 女,奇数 男
            return car.charAt(16) % 2 == 0 ? "女" : "男";
        }else{
            return  car.charAt(16) % 2 == 0 ? "grill" : "boy";
        }

    }

    public String getLanguage() {
        return language;
    }

    public void setLanguage(String language) {
        this.language = language;
    }
}
View Code

 如何实现自定义的规则(Formatter)的地址:https://www.cnblogs.com/oukele/p/10042607.html

FormId注解代码:

package com.oukele.CustomAnnotation;

import java.lang.annotation.*;

@Target({ElementType.PARAMETER})
@Retention(RetentionPolicy.RUNTIME)
public @interface FormId {
    String value() default "";
}

 

CardId类的代码:
package com.oukele.model;

import java.util.Date;


public class CardId {
    //身份证
    private String info;
    //省份
    private String Province;
    //出生日期
    private Date birthday;
    //性别
    private String sex;

    public CardId(String province, Date birthday, String sex) {
        Province = province;
        this.birthday = birthday;
        this.sex = sex;
    }

    public String getInfo() {
        return info;
    }

    public void setInfo(String info) {
        this.info = info;
    }

    public String getProvince() {
        return Province;
    }

    public void setProvince(String province) {
        Province = province;
    }

    public Date getBirthday() {
        return birthday;
    }

    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }

    public String getSex() {
        return sex;
    }

    public void setSex(String sex) {
        this.sex = sex;
    }
}
View Code

 

Controller层代码:

注意:要使用自定义的类型转换器要在(比如 在spring-web配置文件 )注册,并启用。
注册:

启用:

 

 运行结果:

 

 
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posted @ 2018-11-30 15:10  追梦滴小蜗牛  阅读(1328)  评论(0编辑  收藏  举报