我有一个带有自动完成输入字段的表单。当有3
输入中的字符会触发事件，我不希望这种情况发生。
输入具有onfocus=//do something参数。
我已经尝试event.preventDefault()，stopPropagation，return false但没有效果
答案 0 :(得分：0)
这将删除输入的onFocus属性：
package testers.jpa.beans;
import java.io.Serializable;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import javax.persistence.Basic;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.NamedQuery;
import javax.persistence.Table;
import javax.persistence.Transient;
import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
@Entity
@Table(name = "dbo.tester")
//Ignore the actual calendar object here because the jsonner strips the timezone info from it
@JsonIgnoreProperties(value = { "date" })
@NamedQuery(name = "NameAndOffset.purge", query = "DELETE FROM NameAndOffset")
public class NameAndOffset implements Serializable {
private static final long serialVersionUID = 1L;
private String name;
private Calendar date;
public NameAndOffset() {
}
public NameAndOffset(String name, Calendar date) {
this.name = name;
this.date = date;
}
@Id
@Basic
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
/**
* Return a string representation of the {@link NameAndOffset#date} object.<br/>
* This will be used by JPA and the Jsonner to prevent losing the timezone
* information<br/>
* <br/>
* For this to work properly you must tell both the Json mapper and JPA to
* ignore anything else that relates to the {@link NameAndOffset#date} field
*
* @return A String representation of the {@link NameAndOffset#date} field,
* formatted for SQL Server's datetimeoffset data type
*/
@Basic
@Column(name = "date")
public String getDateTimeOffset() {
return new OffsetDateFormat().formatCalendar(date);
}
public void setDateTimeOffset(String date) throws ParseException {
this.date = new OffsetDateFormat().parseCalendar(date);
}
//Ignore the actual calendar object here because JPA strips the timezone info from it
@Transient
public Calendar getDate() {
return date;
}
public void setDate(Calendar date) throws ParseException {
this.date = date;
}
class OffsetDateFormat extends SimpleDateFormat {
private static final long serialVersionUID = 1L;
private static final String OFFSET_FORMAT = "yyyy-MM-dd HH:mm:ss.S Z";
public OffsetDateFormat() {
super(OFFSET_FORMAT);
}
public Calendar parseCalendar(String source) throws ParseException {
//pull out the colon in the offset
int timeZoneColon = source.lastIndexOf(":");
String nocolon = source.substring(0, timeZoneColon) + source.substring(timeZoneColon + 1);
Calendar cal = Calendar.getInstance();
cal.setTime(parse(nocolon));
//after parsing, the timezone of this DateFormatter changes to whatever was represented in the string
//make sure the new calendar reflects this
cal.setTimeZone(getTimeZone());
return cal;
}
public String formatCalendar(Calendar calendar) {
setTimeZone(calendar.getTimeZone());
String nocolon = format(calendar.getTime());
//add the colon
StringBuffer sb = new StringBuffer(nocolon.substring(0, nocolon.length() - 2)).append(":").append(nocolon.substring(nocolon.length() - 2));
return sb.toString();
}
}
}