Question

java 中 blob转字符串?

java 中 blob转字符串?有无例子?
现在遇到的问题是:

BufferInputStream is=new BufferInputStream(blob.getBinaryStream())

byte [] by=new byte[大小?]
is.read(by);

现在想new1个byte类型,但大小似乎获取不到.
不知道有更好方法没有?

Answer 1

BufferedInputStream bi = new BufferedInputStream(blob.getBinaryStream());
data= new byte[READ_BUFFER_SIZE];
for (int len = 0; (len = bi.read(data)) != -1;) {
outfile+=new String(data,"GBK");
data= new byte[READ_BUFFER_SIZE];

}

在循环里面要清空data
因为read只是覆盖的读,而不是清空了读,所以要重新new bate[]

Answer 2

ReadInputStream去读，读出来的就只字符串