Load resource file test / 讀取資源檔案測試

測試 function:
object.getClass().getResourceAsStream(filename);

Project 的資料夾結構:



結論:
* 只寫檔名只能找到與該 class 相同的 namespace 下的檔案.
* 若以相對路徑的寫法, 則 jar 檔內的檔案一律找不到. 即使在相同目錄也找不到.
* 以絕對路徑的寫法, 可以完全找到.


Project: ResTest1

package tw.purple.test;

import java.io.*;

public class ResTest1 {
 public static void main(String[] args) {
  ResTest1 test = new ResTest1();
  test.runTest();
 }
 
 public void runTest() {
  String[] pathList = {
   "" 
   ,"./"
   ,"/"
   ,"../"
   ,"../../"
   ,"../../../"
   ,"/tw/"
   ,"/tw/purple/"
   ,"/tw/purple/test/"
   ,"/tw/yahoo/"
  };
  String[] nameList = {
    "log4j_1.properties"
    ,"log4j_2.properties"
    ,"log4j_3.properties"
    ,"log4j_4.properties"
    ,"log4j_5.properties"
    ,"log4j_6.properties"
    ,"log4j_7.properties"
    ,"log4j_8.properties"
   };
  
  for (int i=0; i<pathList.length; i++) {
   for (int j=0; j<nameList.length; j++) {
    String filename = pathList[i] + nameList[j];
    InputStream stream = this.getClass().getResourceAsStream(filename);
    if (stream==null) System.out.print(" not found: ");
     else System.out.print("     found: ");
    System.out.println(filename);
   }
  }
 }

}

Project: ResTest2

package tw.purple.test;

public class ResTest2 {
 public static void main(String[] args) {
  // TODO Auto-generated method stub
  ResTest1 test1 = new ResTest1();
  test1.runTest();
 }
}