springMVC数据绑定之日期属性编辑器（最好用）

Posted 2022-11-06 星力量

springMVC数据绑定之日期属性编辑器（最好用）

特点：

1. 默认支持常用的4种日期格式；

2. 支持扩展日期格式

直接上代码：

import java.awt.*;
import java.beans.PropertyChangeListener;
import java.beans.PropertyEditor;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

/** 自适应 日期格式化 属性编辑器
 * Created by wikeL on 2016/6/17.
 */
public class CustomDatePropertyEditor implements PropertyEditor 
    private DateFormat defaultDateFormat;
    public static final String defaultDatePatter = "yyyy-MM-dd HH:mm:ss";
    private boolean allowEmpty;

    private Map<String ,DateFormat> dateFormatMap = new HashMap<String, DateFormat>();

    private Map<String,String> datePatternMap = new HashMap();
    public static final Map<String,String> defaultDatePatternMap = new HashMap();
    static 
        defaultDatePatternMap.put("yyyy-MM-dd"  ,"[0-9]4-[0-9]2-[0-9]2");
        defaultDatePatternMap.put("yyyy-MM-dd HH:mm:ss"  ,"[0-9]4-[0-9]2-[0-9]2[\\\\s]1,2[0-9]2:[0-9]2:[0-9]2");
        defaultDatePatternMap.put("yyyy/MM/dd"  ,"[0-9]4/[0-9]2/[0-9]2");
        defaultDatePatternMap.put("yyyy/MM/dd HH:mm:ss"  ,"[0-9]4/[0-9]2/[0-9]2[\\\\s]1,2[0-9]2:[0-9]2:[0-9]2");
    

    //date
    private Object value;

    /**
     *
     * @param dateFormat 默认日期格式化
     * @param allowEmpty 是否允许为空
     * @param datePatternMap 日期模式 , 日期模式对应的正则表达式
     */
    public CustomDatePropertyEditor(DateFormat dateFormat, boolean allowEmpty, Map<String,String> datePatternMap) 
        if(null == dateFormat)
            defaultDateFormat = new SimpleDateFormat(defaultDatePatter);
            defaultDateFormat.setLenient(false);
        else
            this.defaultDateFormat = dateFormat;
        
        this.allowEmpty = allowEmpty;

        this.adDdatePattern(datePatternMap);
        this.initDateFormatMap();
    

    private void initDateFormatMap()
        for(Map.Entry<String,String> entry : this.getDatePatternMap().entrySet())
            try
                SimpleDateFormat dateFormat = new SimpleDateFormat(entry.getKey());
                dateFormat.setLenient(false);
                this.getDateFormatMap().put(entry.getKey() ,dateFormat);
            catch (Exception e)
                e.printStackTrace();
            
        
    

    @Override
    public String getAsText() 
        Date value = (Date)this.getValue();

        String dateStr = "";
        if(null != value && null != this.defaultDateFormat)
            dateStr = this.defaultDateFormat.format(value);
        

        return dateStr;
    

    @Override
    public void setAsText(String text) throws IllegalArgumentException 
        if(this.allowEmpty && ( null == text || text.trim().length() == 0 ) ) 
            this.setValue((Object)null);
            return;
        
        Date d = null;
        for(Map.Entry<String ,DateFormat> e : this.getDateFormatMap().entrySet())
            String datePatter = e.getKey();
            DateFormat format = e.getValue();
            String regex = this.getDatePatternMap().get(datePatter);
            if(null != regex && text.matches(regex))
                //System.err.println("datePatter: " + datePatter + " ,regex: " + regex + " ,format: " + format);
                try 
                    d = (Date)format.parse(text);
                 catch (Exception ex) 
                    String msg = String.format("dateFormat[%s] Could not parse date [%s] : " ,e.getValue() ,text);
                    throw new IllegalArgumentException(msg, ex);
                
                break;
            
        
        if(null == d && null != this.getDefaultDateFormat())
            try 
                d = (Date)this.getDefaultDateFormat().parse(text);
             catch (Exception ex) 
                String msg = String.format("defaultDateFormat[%s] Could not parse date [%s] : " ,this.getDefaultDateFormat() ,text);
                throw new IllegalArgumentException(msg, ex);
            
        
        this.setValue(d);
    

    @Override
    public void setValue(Object value) 
        this.value = value;
    

    @Override
    public Object getValue() 
        return value;
    

    @Override
    public boolean isPaintable() 
        return false;
    

    @Override
    public void paintValue(Graphics gfx, Rectangle box) 

    

    @Override
    public String getJavaInitializationString() 
        return null;
    

    @Override
    public String[] getTags() 
        return null;
    

    @Override
    public Component getCustomEditor() 
        return null;
    

    @Override
    public boolean supportsCustomEditor() 
        return false;
    

    @Override
    public void addPropertyChangeListener(PropertyChangeListener listener) 

    

    @Override
    public void removePropertyChangeListener(PropertyChangeListener listener) 

    

    public boolean isAllowEmpty() 
        return allowEmpty;
    

    public void setAllowEmpty(boolean allowEmpty) 
        this.allowEmpty = allowEmpty;
    

    public DateFormat getDefaultDateFormat() 
        return defaultDateFormat;
    

    public void setDefaultDateFormat(DateFormat defaultDateFormat) 
        this.defaultDateFormat = defaultDateFormat;
    

    public Map<String,String> getDatePatternMap() 
        if(null == this.datePatternMap)
            this.datePatternMap = new HashMap();
        
        if(datePatternMap.isEmpty())
            datePatternMap.putAll(defaultDatePatternMap);
        
        return datePatternMap;
    

    private void adDdatePattern(Map<String,String> datePatternMap) 
        if(null == datePatternMap)
            return;
        
        for(Map.Entry<String,String> entry : datePatternMap.entrySet())
            if(null != entry.getKey() && null != entry.getValue())
                this.getDatePatternMap().put(entry.getKey() , entry.getValue());
            
        
    

    public Map<String, DateFormat> getDateFormatMap() 
        if(null == dateFormatMap)
            dateFormatMap = new HashMap<String, DateFormat>();
        
        return dateFormatMap;
    

 

应用方式（一）springMVC controller 中应用：

public abstract class BaseController 
    @InitBinder
    protected void initBinder(HttpServletRequest request,
                              ServletRequestDataBinder binder) throws Exception 

        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        dateFormat.setLenient(false);

        PropertyEditor dateEditor = new CustomDatePropertyEditor(dateFormat , true , null);
//        dateEditor = new CustomDateEditor(dateFormat, true);

        binder.registerCustomEditor(Date.class, dateEditor);