Java on the database operation, not a place please give some advice!

Java对数据库的操作！
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....................\....\...\....\conn
....................\....\...\....\....\db.java~1~
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....................\....\classes
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....................\....\.......\package cache
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....................\....\.......\....\Applet1.class
....................\....\.......\....\Applet1_jButton1_actionAdapter.class
....................\....\.......\....\Applet1_jButton2_actionAdapter.class
....................\....\.......\....\conn
....................\....\.......\....\....\db.class
....................\....\src
....................\....\...\test
....................\....\...\....\app1.html
....................\....\...\....\applent2.java
....................\....\...\....\Applet1.class
....................\....\...\....\Applet1.java
....................\....\...\....\Applet1.java.bak
....................\....\...\....\Applet1_jButton1_actionAdapter.class
....................\....\...\....\Applet1_jButton2_actionAdapter.class
....................\....\...\....\conn
....................\....\...\....\....\db.java
....................\....\test.jpx
....................\....\test.jpx.local
....................\....\test.jpx.local~
....................\....\test.ldb
....................\....\test.mdb
....................\test.rar

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