maven使用时发生tools.jar错误

在Maven使用时会发生tools.jar这个包错误，查看Build Path发指指向的不是jdk1.6的，而是指向了1.5的。

引用

12-7-26 下午05时01分20秒: Build errors for show; org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal on project show: Could not resolve dependencies for project com.test:show:war:0.0.1-SNAPSHOT: Could not find artifact com.sun:tools:jar:1.5.0 at specified path D:\Program Files\Java\jre6/lib/tools.jar
12-7-26 下午05时01分58秒: Maven Builder: AUTO_BUILD
12-7-26 下午05时02分22秒: Build errors for show; org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal on project show: Could not resolve dependencies for project com.test:show:war:0.0.1-SNAPSHOT: Could not find artifact com.sun:tools:jar:1.5.0 at specified path D:\Program Files\Java\jre6/lib/tools.jar
12-7-26 下午05时02分22秒: Maven Builder: FULL_BUILD requireFullBuild

这个问题可以用以下几种方法解决:
1.pom.xml里加一个依赖指向我的

<dependency>
	<groupId>com.sun</groupId>
	<artifactId>tools</artifactId>
	<version>1.6.0</version>
	<scope>system</scope>
	<systemPath>C:/Program Files/Java/jdk1.6.0_19/lib/tools.jar</systemPath>
</dependency>

2.在eclipse.ini里加

-vm
D:/Program Files/Java/jdk1.6.0_19/bin/javaw.exe