java 字符编码（国外英文资料）.docVIP

java 字符编码（国外英文资料） String newStr = new String (), utf-8); In Java String class is carried out in accordance with the unicode encoding, when using a String (byte [] bytes, String encoding) in the String structure, encoding is referring to bytes of data are encoded by that way, what is the String rather than the encoding, in other words, is to make the system the bytes of data by encoding encoding converts unicode. If not specified, the bytes encoding will be determined by the JDK based on the operating system. When we read data from a file, it is best to use the InputStream method, and then use a String (byte [] bytes, String encoding) to indicate the encoding of the file. Do not use Reader mode, because the Reader method automatically converts the file content to unicode encoding according to the encoding specified by the JDK. When we read text data from the database, we use the ResultSet. GetBytes () method to get the byte array, which also USES the string construct method with the encoding method. The ResultSet rs; Bytep [] bytes = RRS. String STR = new String (bytes, gb2312); Dont take the following steps. The ResultSet rs; String STR = rr.getstring (); STR = new String ( iso8859-1 ), gb2312); This type of encoding conversion is efficient. The reason for this is that the ResultSet in the getString () method, the default data library is encoded in iso8859-1. The system converts the data to unicode according to the iso8859-1 encoding. Use STR. GetBytes ( iso8859-1 ) to restore the data, then use new String (bytes, gb2312) to convert the data from gb2312 to unicode, with a number of steps in the middle. When you read the parameters from HttpRequest, you set the encoding method by using the reqeust setCharacterEncoding () method, which is the right thing to read. Say first Java. Any String resource in the JVM is Unicode, meaning that any String type data is Unicode encoded. There are no exceptions. Since there is only one encoding, we can say that the String inside th