[JAVA] Put the file in the properties of string in spring xml configuration

These days, java configuration is normal, so I don't have much trouble. For example, suppose you are writing spring-batch in xml and want to set the sql property to the SQL string that went out to the file.

FileCopyUtils [java --How do I load a resource and use its contents as a string in Spring --Stack Overflow](https://stackoverflow.com/questions/14022839/how-do-i-load-a-resource-and-use -its-contents-as-a-string-in-spring)

	<bean id="sql" class="java.lang.String">
			<bean class="org.springframework.util.FileCopyUtils"
				<constructor-arg value="classpath:a.txt"
					type="java.io.InputStream" />

Create a class that reads from a file and returns a string

The above is all completed with XML, but it seems to be a little long. So, think about making your own bean that just does that.

import java.io.File;
import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.file.Files;
import java.util.stream.Collectors;

import org.springframework.util.ResourceUtils;

public class ResourceToStringUtils {
	public String to(String location) throws IOException {
                ApplicationContext ctx = ...;
                BufferedReader in
                    = new BufferedReader(new InputStreamReader(resource.getInputStream(), Charset.defaultCharset()));
                return = in.lines().collect(Collectors.joining(System.lineSeparator()));

                // 2017/0/02 Addendum I used to write as below, but depending on the environment, FileNotFoundException will occur.
                //Details will be written separately. maybe.
                //File file = ResourceUtils.getFile(location);
                //return Files.lines(file.toPath(), Charset.defaultCharset()).collect(Collectors.joining(System.lineSeparator()));


Create a class that receives the location of spring, reads all the contents of the file, converts it to a string, and returns it.

<bean id="resourceToStringUtils"

<property name="p" value="#{resourceToStringUtils.to('file:hoge.txt')}"></property>
<property name="p" value="#{resourceToStringUtils.to('classpath:foo.sql')}"></property>

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