maven 遇见的问题

Missing artifact javax.transaction:jta:jar:1.0.1B

<repositories>
<repository>
<id>java</id>
<name>java official repository</name>
<url>http://download.java.net/maven/2/</url>
</repository>
</repositories>

Missing artifact net.sf.json-lib:json-lib:jar:2.4