如何从外壳程序脚本以String格式将文件的内容作为参数传递给java方法？

Question

I am calling a java method from shell script.It accepts String parameter. I am supposed to pass whole file content as a parameter.

Now from shell script I am getting the whole file Content using

orgFileContent=$(awk '$1=$1' ORS='\\\\n' $orgFile)

when I try to print this in sh..I am getting the whole content.But When I try to print this the called java method.I am just getting first two lines.

What will be the reason? How can I pass the whole file as a string?

Thanks in advance

Answer 1

Suppose you have a static main in class Main. You could use xargs command to pass the contents of the file to the executing Java program, ie

$ xargs java -classpath CLASSPATH Main < youInputFile

By doing so, the contents of the file will be passed over the pipe to xargs command hence you could print the file contents with a simple

System.out.println(args[0])

However, if you try to execute the command as shown below, any newline character present in your input file will mean a new passed argument, hence the same Java code would print only the first line and then ignore the rest of the file (as the 1st word is 1st arg, ...)

$ cat yourInputFile | xargs java -classpath CLASSPATH Main

Answer 2

只需用双引号将变量

java -classpath CLASSPATH Main "$orgFileContent"