JAVA里面如何将字符串日期插入到MYSQL数据库 java中怎样将字符串转换成日期形式存入数据库
java\u600e\u6837\u5c06\u5b57\u7b26\u578b\u7684\u65e5\u671f\u8f6c\u4e3a\u65e5\u671f\u578b\u63d2\u5165\u5230\u6570\u636e\u5e93\u4e2d//yyyy-MM-dd hh:mm:ss
public static Date dateTimeString2Date(String date_str) {
try {
Calendar cal = Calendar.getInstance();
java.sql.Timestamp timestampnow = new java.sql.Timestamp(cal.getTimeInMillis());
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
ParsePosition pos = new ParsePosition(0);
java.util.Date current = formatter.parse(date_str, pos);
timestampnow = new java.sql.Timestamp(current.getTime());
return timestampnow;
}
catch (NullPointerException e) {
return null;
}
}
//\u683c\u5f0f\u4ee5\u4e0a\u9762\u4e0d\u4e00\u6837yyyy-MM-dd
public static Date dateString2Date(String date_str) {
try {
Calendar cal = Calendar.getInstance();
java.sql.Timestamp timestampnow = new java.sql.Timestamp(cal.getTimeInMillis());
SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
ParsePosition pos = new ParsePosition(0);
java.util.Date current = formatter.parse(date_str, pos);
return current;
}
catch (NullPointerException e) {
return null;
}
}
\u81f3\u4e8e\u63d2\u5165\u6570\u636e\u5e93\uff0c\u53ef\u4ee5\u7528java.sql.PreparedStatement;
java\u5c06\u5b57\u7b26\u4e32\u8f6c\u6362\u6210\u65e5\u671f\uff0c\u53ef\u4ee5\u4f7f\u7528\u683c\u5f0f\u7c7b\uff0c\u5b9e\u4f8b\u5982\u4e0b\uff1a
public static Date dateTimeString2Date(String date_str) { try { Calendar cal = Calendar.getInstance();//\u65e5\u671f\u7c7b java.sql.Timestamp timestampnow = new java.sql.Timestamp(cal.getTimeInMillis());//\u8f6c\u6362\u6210\u6b63\u5e38\u7684\u65e5\u671f\u683c\u5f0f SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); ParsePosition pos = new ParsePosition(0); java.util.Date current = formatter.parse(date_str, pos); timestampnow = new java.sql.Timestamp(current.getTime()); return timestampnow; } catch (NullPointerException e) { return null; } }
这样改
new SimpleDateFormat("yyyy-MM-dd").parse(user.getBirthday())
就可以转了，
注意：user.getBirthday()的格式必须是"1987-11-22"这种格式的，就是要跟指定的yyyy-MM-dd格式匹配，当然也可以指定yyyyMMdd对应的格式就是19871122了，这些看一些API跟着写几个例子试试就会了
不过转化得到的是java.util.Date，
而pstam.setDate()中需要的是java.sql.Date，可以这样转化
java.util.Date date = new SimpleDateFormat("yyyy-MM-dd").parse(user.getBirthday());
new java.sql.Date(date.getTime())这样就可以转化了，而不是像你程序那样强转
这样是可以的。不知道你说的好像不行，到底是哪不行。
绛旓細闇瑕佸厛鎸囧畾鏃ユ湡鐨勬牸寮 杩欐牱鏀 new SimpleDateFormat("yyyy-MM-dd").parse(user.getBirthday())灏卞彲浠ヨ浆浜锛屾敞鎰忥細user.getBirthday()鐨勬牸寮忓繀椤绘槸"1987-11-22"杩欑鏍煎紡鐨勶紝灏辨槸瑕佽窡鎸囧畾鐨剏yyy-MM-dd鏍煎紡鍖归厤锛屽綋鐒朵篃鍙互鎸囧畾yyyyMMdd瀵瑰簲鐨勬牸寮忓氨鏄19871122浜嗭紝杩欎簺鐪嬩竴浜汚PI璺熺潃鍐欏嚑涓緥瀛愯瘯璇曞氨浼氫簡...
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