Android 判断数据库中是否存在某个表

[java] view
plain copy







</pre><p style="margin-top:0px; margin-bottom:0px; padding-top:0px; padding-bottom:0px; font-family:Arial; font-size:14px; line-height:26px"><pre name="code" class="java">public boolean tableIsExist(String tabName, SQLiteDatabase db) {

boolean result = false;

if (tabName == null) {

return false;

}

Cursor cursor = null;

try {

String sql = "select count(*) as c from sqlite_master where type ='table' and name ='" + tabName.trim() + "' ";

cursor = db.rawQuery(sql, null);

if (cursor.moveToNext()) {

int count = cursor.getInt(0);

if (count > 0) {

result = true;

}

}

} catch (Exception e) {

// TODO: handle exception

}

return result;

}

对sqlite_master表查询不但可以得到建表的sql语句，还可以获取该数据库内的trigger信息

而在纯java环境下对SQL数据库查询是否目标表格存在的时候可以更简单：

[java] view
plain copy







java.sql.Connection con = getYourConnection();

ResultSet rs = con.getMetaData().getTables(null, null, "yourTable", null );

if (rs.next()) {

//yourTable exist

}else {

//yourTable not exist

}