从request中获取json数据的方法

从request中获取json数据的方法

package com.newpp.core.interceptor;

import java.io.bufferedreader;
import java.io.bytearrayinputstream;
import java.io.ioexception;
import java.io.inputstream;
import java.io.inputstreamreader;

import javax.servlet.servletinputstream;
import javax.servlet.http.httpservletrequest;
import javax.servlet.http.httpservletrequestwrapper;

/**
 * myrequestwrapper.
 * 
 * @author iechenyb
 */
public class myrequestwrapper extends httpservletrequestwrapper {
    private final string body;

    public myrequestwrapper(httpservletrequest request) throws ioexception {
        super(request);
        stringbuilder stringbuilder = new stringbuilder();
        bufferedreader bufferedreader = null;
        try {
            inputstream inputstream = request.getinputstream();
            if (inputstream != null) {
                bufferedreader = new bufferedreader(new inputstreamreader(inputstream));
                char[] charbuffer = new char[128];
                int bytesread = -1;
                while ((bytesread = bufferedreader.read(charbuffer)) > 0) {
                    stringbuilder.append(charbuffer, 0, bytesread);
                }
            } else {
                stringbuilder.append("");
            }
        } catch (ioexception ex) {
            throw ex;
        } finally {
            if (bufferedreader != null) {
                try {
                    bufferedreader.close();
                } catch (ioexception ex) {
                    throw ex;
                }
            }
        }
        body = stringbuilder.tostring();
    }

    @override
    public servletinputstream getinputstream() throws ioexception {
        final bytearrayinputstream bytearrayinputstream = new bytearrayinputstream(body.getbytes());
        servletinputstream servletinputstream = new servletinputstream() {
            public int read() throws ioexception {
                return bytearrayinputstream.read();
            }
        };
        return servletinputstream;
    }

    @override
    public bufferedreader getreader() throws ioexception {
        return new bufferedreader(new inputstreamreader(this.getinputstream()));
    }

    public string getbody() {
        return this.body;
    }
}