大多用于ejb开发的工具都支持dto的自动生成，前提是必须已经存在对应的实体bean。在没有实体bean时，就得我们自己敲那些繁琐无聊毫无意义的代码。这种情况下，这个awk script也许可以帮点忙。 如果你不了解awk，可以去
http://www-900.ibm.com/developerWorks/cn/linux/shell/awk/awk-1/index.shtml
http://www-900.ibm.com/developerWorks/cn/linux/shell/awk/awk-2/index.shtml
http://www-900.ibm.com/developerWorks/cn/linux/shell/awk/awk-3/index.shtml
看看. 如果用的是windows，要想运行这个script，需要去down一个名为awk.exe的解释程序。
对文本要求的格式：
第一行 是 dto 的名字，
其余行 是"类型－变量名"对, 注意别加分号！
如下例：
User_DTO
int id
String name
Collection friends
以下斜体部分是script正文：
BEGIN{
count =0 ;
}
{
if(NF==2)
{
arr[count,0] = $1;
arr[count,1] = $2;
#print arr[count,0], arr[count,1], count;
count++;
}
if(NF==1)
dto = $1;
}
END{
printf("/* DTO created by awk*/\n\n");
printf("/*@todo Complete package & import here*/\n\n");
printf("public class %s implements Serializable\n{\n", dto);
for ( i=0; i< count; i++ ) {
x = arr[i,1];
arrx = arr[i,0];
printf("\tprivate %s %s;\n", arrx, x);
}
printf("\n\n");
printf("\tpublic %s()\n\t{\n\t}\n\n", dto);
printf("\tpublic %s(", dto);
for ( i=0; i< count; i++ ) {
x = arr[i,1];
arrx = arr[i,0];
printf("%s %s", arrx, x);
if(i!=count-1)
printf(", ");
}
printf(")\n\t{\n");
for ( i=0; i< count; i++ ) {
x = arr[i,1];
arrx = arr[i,0];
printf("\t\tthis.%s = %s;\n", x, x);
}
printf("\t}\n\n");
# setters & getters
for ( i=0; i< count; i++ ) {
x = arr[i,1];
arrx = arr[i,0];
xHead = toupper(substr(x,1,1));
xBody= substr(x,2,length(x)-1);
printf("\tpublic void set%s%s(%s %s)\n\t{\n", xHead, xBody, arrx, x);
printf("\t\tthis.%s = %s;\n", x, x);
printf("\t}\n\n");
printf("\tpublic %s get%s%s()\n\t{\n", arrx, xHead, xBody, arrx, x);
printf("\t\treturn %s;\n", x);
printf("\t}\n\n");
}
# equals
printf("\n\n");
printf("\tpublic boolean equals(Object obj)\n\t{\n");
printf("\t\tif (obj != null)\n\t\t{\n");
printf("\t\t\tif (this.getClass().equals(obj.getClass()))\n\t\t\t{\n");
printf("\t\t\t\t%s that = (%s) obj;\n", dto, dto);
printf("\t\t\t\treturn \n");
for ( i=0; i< count; i++ ) {
x = arr[i,1];
arrx = arr[i,0];
xHead = toupper(substr(x,1,1));
xBody= substr(x,2,length(x)-1);
if(arrx=="byte" || arrx=="char" || arrx=="int" || arrx=="long" || arrx=="float" || arrx=="double" || arrx=="boolean" )
{
printf("\t\t\t\t\tthis.get%s%s() == that.get%s%s() ", xHead, xBody, xHead, xBody);
}else
{
printf("\t\t\t\t\t(((this.get%s%s() == null) && (that.get%s%s() == null)) ||\n", xHead, xBody, xHead, xBody);
printf("\t\t\t\t\t\t(this.get%s%s() != null && this.get%s%s().equals(that.get%s%s())))", xHead, xBody, xHead, xBody, xHead, xBody);
}
if(i!=count-1)
printf(" && \n");
else
printf(";\n");
}
printf("\t\t\t}\n\t\t}\n\t\treturn false;\n\t}\n\n");
# hashCode()
printf("\tpublic int hashCode()\n\t{\n");
printf("\t\treturn (");
for ( i=0; i< count; i++ ) {
x = arr[i,1];
if(i!=0)
printf(" + ");
printf("\"\" + %s", x);
}
printf(").hashCode();");
printf("\n\t}\n\n");
# toString()
printf("\tpublic String toString()\n\t{\n");
printf("\t\treturn ");
for ( i=0; i< count; i++ ) {
x = arr[i,1];
if(i==0)
printf("\"\" + ");
else
printf(" + \",\" + ");
printf("%s", x);
}
printf(";");
printf("\n\t}\n\n");
printf("}");
}
#########################################################
# 如果有bug，请告诉我，thanks! :)
# Ed Yan, msn/email: huidaoren@hotmail.com
# 2004.03.30
#########################################################
