FileUtil.java
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package daeucna.batch.util;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import org.springframework.core.io.ClassPathResource;
import com.google.gson.Gson;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
public class FileUtil {
public static StringBuffer readFileToString(String resourceName) {
StringBuffer sb = new StringBuffer();
try {
ClassPathResource resource = new ClassPathResource(resourceName);
BufferedReader br = new BufferedReader(new InputStreamReader(resource.getInputStream()));
// br.readLine() 이 null 인지 검사할 때 한번 사용되므로 String 에 먼저 저장해둬야한다.
String s = "";
while((s = br.readLine()) != null){
sb.append(s);
}
} catch (Exception e) {
sb.append(e.getStackTrace());
}
return sb;
}
public static JsonObject strToJsonObj(String jsonString) {
JsonObject jsonObject = JsonParser.parseString(jsonString).getAsJsonObject();
return jsonObject;
}
public static Object strToObj(String jsonString, Class<?> anyClass) {
Gson gson = new Gson();
Object convertedObject = gson.fromJson(jsonString, anyClass);
return convertedObject;
}
public static String objToStr(Object obj) {
Gson gson = new Gson();
String stringObject = gson.toJson(obj);
return stringObject;
}
}