JAVA如何編寫全局的日期格式處理器

後端定義Date類型的數據，但是前端傳date類型的時候會有問題。原因我也忘記了，之前做的，現在整理一下。

前端傳過來的DATE數據是String類型的，首先需要 創建一個類去處理日期格式的String類型的數據。

CustomDateConverter 類

package com.gisquest.jsyd.business.common;

import org.springframework.core.convert.converter.Converter;
import org.springframework.util.StringUtils;

import java.text.SimpleDateFormat;
import java.util.Date;

/**
 * 字符牀轉換日期的轉換器
 *  要在mvc 配置文件中進行配置啓動
 */

public class CustomDateConverter implements Converter<String, Date>  {
    private static final String dateFormat      = "yyyy-MM-dd HH:mm:ss";
    private static final String shortDateFormat = "yyyy-MM-dd";

    /**
     * @param source
     * @return
     */
    @Override
    public Date convert(String source) {
        if (StringUtils.isEmpty(source)) {
            return null;
        }
        source = source.trim();
        try {
            if (source.contains("-")) {
                SimpleDateFormat formatter;
                if (source.contains(":")) {
                    formatter = new SimpleDateFormat(dateFormat);
                } else {
                    formatter = new SimpleDateFormat(shortDateFormat);
                }
                Date dtDate = formatter.parse(source);
                return dtDate;
            } else if (source.matches("^\\d+$")) {
                Long lDate = new Long(source);
                return new Date(lDate);
            }
        } catch (Exception e) {
            throw new RuntimeException(String.format("parser %s to Date fail", source));
        }
        throw new RuntimeException(String.format("parser %s to Date fail", source));
    }
}

進行配置

package com.gisquest.jsyd.business.common;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.convert.support.GenericConversionService;
import org.springframework.web.bind.support.ConfigurableWebBindingInitializer;
import org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter;

import javax.annotation.PostConstruct;

@Configuration
public class WebConfigBeans {

    @Autowired
    private RequestMappingHandlerAdapter handlerAdapter;

    /**
     * 增加字符串轉日期的功能
     */

    @PostConstruct
    public void initEditableAvlidation() {

        ConfigurableWebBindingInitializer initializer = (ConfigurableWebBindingInitializer)handlerAdapter.getWebBindingInitializer();
        if(initializer.getConversionService()!=null) {
            GenericConversionService genericConversionService = (GenericConversionService)initializer.getConversionService();

            genericConversionService.addConverter(new CustomDateConverter());

        }

    }

}