在Eclipes中ANT打包出错，不知道如何解决

Question

[code="java"]//出错信息

Buildfile: D:\workspace\spp_db_connection\build.xml
compile:
[delete] Deleting directory D:\workspace\spp_db_connection\build
[mkdir] Created dir: D:\workspace\spp_db_connection\build
[copy] Copying 1 file to D:\workspace\spp_db_connection\build
[javac] Compiling 4 source files to D:\workspace\spp_db_connection\build
[javac] D:\workspace\spp_db_connection\src\net\hkbn\prov\sql\SqlConnection.java:26: cannot access java.lang.Object
[javac] bad class file: C:\Program Files\Java\jre1.6.0_07\lib\rt.jar(java/lang/Object.class)
[javac] class file has wrong version 49.0, should be 48.0
[javac] Please remove or make sure it appears in the correct subdirectory of the classpath.
[javac] Connection getConnection();
[javac] ^
[javac] 1 error

BUILD FAILED
D:\workspace\spp_db_connection\build.xml:64: Compile failed; see the compiler error output for details.
[/code]

Answer 1

你用的是 C:\Program Files\Java\jre1.6.0_07\lib\rt.jar 1.6的jre.

[javac] Connection getConnection();   
[javac] ^   
[javac] 1 error   

是否你的Connection的Driver是1.49的?

1.4-1.5 有很大差异, 很容易出兼容问题.

反正你需要去查查jre版本问题.