java对URL编码 和解码
对中文加密:
String message="中文";
try {
message=URLEncoder.encode(message, "utf-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}

message=%E4%B8%AD%E6%96%87

对Url解密:
try {
essage = URLDecoder.decode(message, "utf_8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}

message=中文