我有以下字符串：{"array 1":[ ....
我想删除[之前的所有内容。
为此我使用：.replace("{\"array 1\":", "");并且效果很好。
但是，我有几个数组，所以我想根据保存数组名称的变量进行替换。
例如：
String arr_name = "array 1";
....replace('{\"arr_name\":", "");
是否可以使用变量键替换字符串？
编辑：
我最终添加了另一个元素来解析JSON中删除其名称的数组。
谢谢大家的快速评论和建议。
答案 0 :(得分：0)
你可以做一个字符串格式，这是一个例子：
$(this).closest('.section').find('.popup-overlay').removeClass('popup-overlay-show');
$(this).closest('.section').find('.popup-overlay').addClass('popup-overlay-show');
答案 1 :(得分：0)
只需使用一个子字符串，从索引import java.io.IOException;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.net.SocketAddress;
import java.net.StandardSocketOptions;
import java.nio.ByteBuffer;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.nio.charset.Charset;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.LinkedBlockingQueue;
public class Main {
static SocketChannel channel;
public static void main(String[] args) throws IOException {
System.out.println("Listening for connections on : 8888"); //8888
ServerSocketChannel serverChannel = ServerSocketChannel.open();
serverChannel.bind(new InetSocketAddress(8888));
channel = serverChannel.accept();
System.out.println("Connected...");
channel.setOption(StandardSocketOptions.TCP_NODELAY, true);
channel.configureBlocking(false);
ReceiveFromOMS receivefromOMS;
SendToExchange sendExchange;
receivefromOMS = new ReceiveFromOMS();
sendExchange = new SendToExchange();
Thread t1 = new Thread(receivefromOMS);
Thread t2 = new Thread(sendExchange);
t1.start();
t2.start();
}
}
class ReceiveFromOMS extends Thread{
public static SocketChannel channel;
static ByteBuffer buffer = ByteBuffer.allocate(1024);
static ServerSocketChannel serverChannel ;
public static int ReceiveFromOMSPort;
BlockingQueue<String> fromOMSqueue = new LinkedBlockingQueue<>(30);
@Override
public void run(){
while(true){
try {
receiveFromOMS();
} catch (InterruptedException ex) {
System.err.println(ex.getMessage());
try {
Thread.sleep(5000);
} catch (InterruptedException ex1) { }
}
}
}
public void receiveFromOMS() throws InterruptedException{
try {
int numRead = -1;
numRead = channel.read(buffer);
while(numRead==0){
numRead = channel.read(buffer);
}
if (numRead == -1) {
Socket socket = channel.socket();
SocketAddress remoteAddr = socket.getRemoteSocketAddress();
System.out.println("Connection closed by client: " + remoteAddr);
channel.close();
return;
}
byte[] data = new byte[numRead];
System.arraycopy(buffer.array(), 0, data, 0, numRead);
fromOMSqueue.add(new String(data));
String msg = fromOMSqueue.poll();
System.out.println("OutGoing To Exchange>> " + msg);
SendToExchange.sendToEchange(msg);
buffer.flip();
buffer.clear();
} catch (IOException ex) {
System.err.println(ex.getMessage());
Thread.sleep(5000);
}
}
}
class SendToExchange extends Thread{
static SocketChannel channel;
static ByteBuffer bb = ByteBuffer.allocateDirect(1024);
static Charset charset = Charset.forName("UTF-8");
public byte[] data;
public static String message;
@Override
public void run(){
try {
while(true){
receive();
Thread.sleep(100);
}
} catch (IOException | InterruptedException ex) {
System.err.println(ex.getMessage());
try {
Thread.sleep(5000);
} catch (InterruptedException ex1) {}
}
}
public static void sendToEchange(String msg){
try {
bb = stringToByteBuffer(msg, charset);
channel.write(bb);
} catch (IOException ex) {
System.err.println(ex.getMessage());
}
}
public void receive() throws IOException {
ByteBuffer buffer = ByteBuffer.allocateDirect(1024);
int numRead = -1;
numRead = channel.read(buffer);
while (numRead == 0) {
numRead = channel.read(buffer);
}
if (numRead == -1) {
Socket socket = channel.socket();
SocketAddress remoteAddr = socket.getRemoteSocketAddress();
System.out.println("Connection closed by Exchange: " + remoteAddr);
channel.close();
return;
}
buffer.flip();
data = new byte[numRead];
buffer.get(data);
message = new String(data);
System.out.println("Incoming from Exchange>> " + message);
buffer.clear();
}
public static ByteBuffer stringToByteBuffer(String msg, Charset charset){
return ByteBuffer.wrap(msg.getBytes(charset));
}
}
开始。
[这会给 String input = "{\"array 1\":[key:value...";
String result = input.substring(input.indexOf('['));