web.xml中的filterMina的底层依赖的主要是Ja(16)

第一步，协议对象：

package com.dxz.minademo3;

public class SmsObject {
    private String sender;// 短信发送者
    private String receiver;// 短信接受者
    private String message;// 短信内容

    public String getSender() {
        return sender;
    }

    public void setSender(String sender) {
        this.sender = sender;
    }

    public String getReceiver() {
        return receiver;
    }

    public void setReceiver(String receiver) {
        this.receiver = receiver;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }
}

第二步，编码器：

在Mina 中编写编码器可以实现ProtocolEncoder，其中有encode()、dispose()两个方法需要实现。这里的dispose()方法用于在销毁编码器时释放关联的资源，由于这个方法一般我们并不关心，所以通常我们直接继承适配器ProtocolEncoderAdapter。

package com.dxz.minademo3;

import java.nio.charset.Charset;
import java.nio.charset.CharsetEncoder;

import org.apache.mina.core.buffer.IoBuffer;
import org.apache.mina.core.session.IoSession;
import org.apache.mina.filter.codec.ProtocolEncoderAdapter;
import org.apache.mina.filter.codec.ProtocolEncoderOutput;

public class CmccSipcEncoder extends ProtocolEncoderAdapter {
    private final Charset charset;

    public CmccSipcEncoder(Charset charset) {
        this.charset = charset;
    }

    @Override
    public void encode(IoSession session, Object message, ProtocolEncoderOutput out) throws Exception {
        SmsObject sms = (SmsObject) message;
        CharsetEncoder ce = charset.newEncoder();
        IoBuffer buffer = IoBuffer.allocate(100).setAutoExpand(true);
        String statusLine = "M sip:wap.fetion.com.cn SIP-C/2.0";
        String sender = sms.getSender();
        String receiver = sms.getReceiver();
        String smsContent = sms.getMessage();
        buffer.putString(statusLine + '\n', ce);
        buffer.putString("S: " + sender + '\n', ce);
        buffer.putString("R: " + receiver + '\n', ce);
        buffer.putString("L: " + (smsContent.getBytes(charset).length) + "\n", ce);
        buffer.putString(smsContent, ce);
        buffer.flip();
        out.write(buffer);
    }
}

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