formatSign: function(e, t, a) { var n = {} , o = a.params || {} , r = l()({}, e, o) , d = null , c = this.objKeySort(r); for (var u in c) void 0 !== r[u] && "notoken" != r[u] && ("object" == s()(r[u]) ? n[u] = "object" : n[u] = r[u]); var p = ""; if (e.signType > 200) { for (var u in d = e.signType - 200, n) { p += u + "=" + n[u] + "," } p = p.slice(0, -1) } else e.signType > 100 && (p = i()(n).join(), d = e.signType - 100); var h = f[d]; return this.signEncrypt(p, t, h) }, 把以上代码JS代码转化为Java代码

以下是将给定的JavaScript代码转换为Java代码的示例```java
import java.util.HashMap;
import java.util.Map;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Arrays;
import java.util.Comparator;

public class SignGenerator {
private static final Map<Integer, String> SIGN_TYPES = new HashMap<Integer, String>() {{
put(101, "MD5");
put(102, "SHA1");
// Add more sign types if necessary
}};

public String formatSign(Map<String, Object> e, String t, Map<String, Object> a) {
Map<String, Object> n = new HashMap<>();
Map<String, Object> o = a.getOrDefault("params", new HashMap<>());
Map<String, Object> r = new HashMap<>(e);
r.putAll(o);
Map<String, Object> d = null;

Map<String, Object> c = objKeySort(r);
for (Map.Entry<String, Object> entry : c.entrySet()) {
String u = entry.getKey();
Object value = entry.getValue();
if (value != null && !value.equals("notoken")) {
if (value instanceof Map) {
n.put(u, "object");
} else {
n.put(u, value);
}
}
}

String p = "";
if (e.get("signType") > 200) {
d = e.get("signType") - 200;
for (Map.Entry<String, Object> entry : n.entrySet()) {
String u = entry.getKey();
Object value = entry.getValue();
p += u + "=" + value + ",";
}
p = p.substring(0, p.length() - 1);
} else if (e.get("signType") > 100) {
p = String.join(",", n.keySet());
d = e.get("signType") - 100;
}

String h = SIGN_TYPES.get(d);
return signEncrypt(p, t, h);
}

private Map<String, Object> objKeySort(Map<String, Object> map) {
Map<String, Object> sortedMap = new HashMap<>();
map.entrySet().stream()
.sorted(Map.Entry.comparingByKey(Comparator.naturalOrder()))
.forEachOrdered(entry -> sortedMap.put(entry.getKey(), entry.getValue()));
return sortedMap;
}

private String signEncrypt(String p, String t, String h) {
String input = p + t;
try {
MessageDigest digest = MessageDigest.getInstance(h);
byte[] encodedHash = digest.digest(input.getBytes());
StringBuilder hexString = new StringBuilder();
for (byte b : encodedHash) {
String hex = Integer.toHexString(0xff & b);
if (hex.length() == 1) {
hexString.append('0');
}
hexString.append(hex);
}
return hexString.toString();
} catch (NoSuchAlgorithmException e) {
e.printStackTrace();
}
return null;
}
}

请注意，转换的代码可能需要根据您的具体需求进行调整和优化。此示例仅提供了一个基本的转换框架。