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KeyGenerator kgen = KeyGenerator.getInstance("AES");
kgen.init(192); // 192 and 256 bits also available£¬ÕâÒ»²½ÊÇ·ñÓа²×°jce unlimited strength jurisdiction policy files ¶¼²»»á³öÏÖÒì³£
Generate the secret key specs.
SecretKey skey = kgen.generateKey();
byte[] raw = skey.getEncoded();
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import java.util.*;
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