Can any one help me to integrate http://developer.dol.gov api for getting listing of jobs?
This isn't an answer, but is too long for a comment.
If you just want to dl the data, searching http://data.gov (not dol.gov) for "job titles" or "job title salary" (both without quotes) may be helpful. Some useful links:
Note that some of these are state or city specific, so be sure to read the data description before use.