linux - bash执行java程序时读取文件问题

Question

写了一个java程序，程序启动时会读取和jar包统计目录的myapp.conf文件
在linux中通过java -jar myapp.jar的方式可以正常启动程序

但是在把命令加入到rc.local后却无法启动，查看日志发现是不能读取到myapp.conf文件

rc.local文件

#!/bin/sh
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.

touch /var/lock/subsys/local
export JAVA_HOME=/usr/java/jdk1.7.0_71  
export CLASSPATH=.:%JAVA_HOME%/lib/dt.jar:%JAVA_HOME%/lib/tools.jar  
export PATH=$PATH:$JAVA_HOME/bin
java -jar /opt/agent/myapp.jar > /opt/agent/myapp.out 2>&1 &

是不是rc.local在执行java程序时会认为脚本所在目录为执行目录？

java读取文件的方法

public static String GetFile(String fileName){
    String strContent = "";
    try {
        String strEncoder = GetEncoder(fileName);
        BufferedReader biFile = new BufferedReader(new InputStreamReader(new FileInputStream(fileName),strEncoder));
        String strSingleLine;
        while ((strSingleLine = biFile.readLine()) != null) {
            strContent += strSingleLine;
            strContent += "\n";
        }
        biFile.close();

    }
    catch (Exception e){
        System.out.println(e.getLocalizedMessage());
    }
    finally {
        return strContent;
    }
}

各位帮忙看看应该怎么办？