top.lingkang.finalsql.utils.NameUtils Maven / Gradle / Ivy
package top.lingkang.finalsql.utils;
import top.lingkang.finalsql.annotation.Table;
import top.lingkang.finalsql.dialect.SqlDialect;
import top.lingkang.finalsql.error.FinalCheckException;
import java.lang.reflect.Field;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author lingkang
* Created by 2022/4/11
*/
public class NameUtils {
private static final Pattern toHump = Pattern.compile("_+[a-zA-Z0-9]");
private static final Pattern unHump = Pattern.compile("[a-z0-9][A-Z0-9]");
/**
* u_user -> uUser
* user->user
*
* @param str
* @return
*/
public static String toHump(String str) {
Matcher matcher;
while ((matcher = toHump.matcher(str)).find()) {
String group = matcher.group();
str = str.replaceAll(group, group.substring(1).toUpperCase());
}
return str;
}
/**
* UUser -> u_user
*
* @param str
* @return
*/
public static String unHump(String str) {
str = str.substring(0, 1).toLowerCase() + str.substring(1);
Matcher matcher;
while ((matcher = unHump.matcher(str)).find()) {
String group = matcher.group();
str = str.replaceAll(group, group.substring(0, 1) + "_" + group.substring(1).toLowerCase());
}
return str;
}
public static String getTableName(Class clazz, SqlDialect dialect) {
Table annotation = clazz.getAnnotation(Table.class);
if (annotation==null){
throw new FinalCheckException("表对象无 @Table 注解");
}
if (CommonUtils.isNotEmpty(annotation.value())) {
return dialect.getTableName(annotation.value());
} else {
return dialect.getTableName(NameUtils.unHump(clazz.getSimpleName()));
}
}
/*public static void main(String[] args) {
System.out.println(toHump("sys__a_user"));
System.out.println(toHump("sys_user_role"));
System.out.println(toHump("sys_1_role"));
System.out.println("sysUser: " + unHump("sysUser"));
System.out.println("sysUserRole: " + unHump("sysUserRole"));
System.out.println("sys1Role: " + unHump("sys1Role"));
System.out.println("sysUserRole: " + unHump("sysUserRole"));
}*/
}