move mailboxes and public folders from exchange 2007 to Exchange 2013

1. How do i move mailboxes from exchange 2007 to exchange 2013. I have more than 1000 mailboxes.
What is the correct way to migrate. do i need to move a single mailbox. During migration do the mailboxes get corrupted
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2. I want to move public folders from Exchange 2007 to Exchange 2013.

I ran powershell commands and got these results please do guide me how to move to exchange 2013.and what are the shell commands

Get-publicfolder

Name Parent Path
---- -----------
IPM_SUBTREE


Get-publicfolder | select AdminDisplayName,FolderPath

AdminDisplayName FolderPath
---------------- ----------

Get-PublicFolderStatistics | select AdminDisplayName,FolderPath

AdminDisplayName FolderPath
---------------- ----------
exchangeV1 schema-root\microsoft\exchangeV1
Internet Newsgroups Internet Newsgroups


Get-PublicFolder -Recurse | fl name,replicas > c:\publicfolder.txt
Name : IPM_SUBTREE
Replicas : {}

Name : Internet Newsgroups
Replicas : {MAIL\Public Folder Storage\Public Folder Database}