利用POI合并多个Excel表

[{"title":"（ 8 个子文件 1.45MB ） 利用POI合并多个Excel表","children":[{"title":"POI_Excel_Sheet","children":[{"title":"Java_Demo","children":[{"title":"src","children":[{"title":"class_demo","children":[{"title":"Excel_Sheet.java <span style='color:#111;'> 8.29KB </span>","children":null,"spread":false}],"spread":true}],"spread":true},{"title":"bin","children":[{"title":"class_demo","children":[{"title":"Excel_Sheet.class <span style='color:#111;'> 9.08KB </span>","children":null,"spread":false}],"spread":true}],"spread":true},{"title":".classpath <span style='color:#111;'> 379B </span>","children":null,"spread":false},{"title":".settings","children":[{"title":"org.eclipse.jdt.core.prefs <span style='color:#111;'> 629B </span>","children":null,"spread":false}],"spread":true},{"title":".myeclipse","children":[{"title":"profiler","children":[{"title":"Excel_Sheet.xml <span style='color:#111;'> 784B </span>","children":null,"spread":false}],"spread":true}],"spread":true},{"title":".project <span style='color:#111;'> 385B </span>","children":null,"spread":false}],"spread":true},{"title":"poi-3.7-20101029.jar <span style='color:#111;'> 1.60MB </span>","children":null,"spread":false},{"title":"POI_Excel_Sheet.docx <span style='color:#111;'> 15.77KB </span>","children":null,"spread":false}],"spread":true}],"spread":true}]