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Java - escape string to prevent SQL injection
I'm trying to put some anti sql injection in place in java and am finding it very difficult to work with the the "replaceAll" string function. Ultimately I need a function that will convert any existing \ to \\ , any " to \" , any ' to \' , and any \n to \\n so that when the string is e...
Why do I need to override the equals and hashCode methods in Java?
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Joshua Bloch says on Effective Java
You must override hashCode() in every class that overrides equals(). Failure to do so will result in a violation of the general contract for Object.hashCode(), which will prevent your class from functioning properly in ...
What is the easiest way to get the current day of the week in Android?
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Use the Java Calendar class.
Calendar calendar = Calendar.getInstance();
int day = calendar.get(Calendar.DAY_OF_WEEK);
switch (day) {
case Calendar.SUNDAY:
// Current day is Sunday
break;
case Calendar.MOND...
Confusion: @NotNull vs. @Column(nullable = false) with JPA and Hibernate
...ensure, that bean properties are set to a none-null value, when validating java beans in the JVM (this has nothing to do with database constraints, but in most situations should correspond to them).
You should additionally use the JPA annotation like @Column(nullable = false) to give the jpa provid...
RESTful Authentication via Spring
...idating end can verify that the claims are indeed trustworthy.
I use this Java implementation: https://bitbucket.org/b_c/jose4j/wiki/Home
There is also a Spring module (spring-security-jwt), but I haven't looked into what it supports.
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Java Byte Array to String to Byte Array
...e! I think you've completely understood what I was after... I'm not from a Java background, so I couldn't really figure out the conversion I needed. Just for info, I'm sending s1 to the server, and the server is replying with s1 (I can verify that the server received and replied with the data in s1)...
程序员之网络安全系列（三）：数据加密之对称加密算法 - 更多技术 - 清泛网...
...安全级别高；
RC4，也是为 RSA Data Security, Inc. 开发的密码系统的商标名称。
传统的DES由于只有56位的密钥，从1997年开始，RSA公司发起了一个称作“向DES挑战”的竞技赛。在首届挑战赛上，罗克·维瑟用了96天时间破解了用DES加...
How can I generate an MD5 hash?
Is there any method to generate MD5 hash of a string in Java?
34 Answers
34
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Type List vs type ArrayList in Java [duplicate]
...rn types being changed as well (will cause a NoSuchMethodException between Java versions if the internal return type changes). An example of this is the change in the return type of keySet in ConcurrentHashMap between Java 7 and 8.
– Rogue
Mar 12 '15 at 23:11
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Convert Json Array to normal Java list
Is there a way to convert JSON Array to normal Java Array for android ListView data binding?
14 Answers
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