【Java基础之Java IO】代码库(一)

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IO 输入输出.java

import java.io.*;import java.util.Scanner;public class Console {    public static void main(String args[]) {        String str = new String();        int[] arr = new int[10];        BufferedReader inputB = new BufferedReader(new InputStreamReader(System.in)); //字节->字符->文本(读取带缓冲)        Scanner inputS = new Scanner(System.in);        try {            str = inputB.readLine();            for (int i=0; i<10; i++) {                arr[i] = inputS.nextInt();            }        } catch (IOException e) {            e.printStackTrace();        }    }}

JSON 处理

合成 JSON.java

package chameleon;import org.json.*;public class Account {    private String ssid;    private String mac;    private String psk;    private JSONObject jb = new JSONObject();    public String getSsid() {        return ssid;    }    public void setSsid(String ssid) {        this.ssid = ssid;    }    public String getMac() {        return mac;    }    public void setMac(String mac) {        this.mac = mac;    }    public String getPsk() {        return psk;    }    public void setPsk(String psk) {        this.psk = psk;    }    public String toString(String mac, String psk) {        String result = null;        if ((mac != null) && (psk != null)) {            try {                jb.put("mac", mac);                jb.put("psk", psk);            } catch (Exception e) {                e.printStackTrace();            }            result = jb.toString();        }        return result;    }}

XML 处理

解析 XML.java

public class SAX {    /**     * 读取 XML.     *      * @param String uri XML 存储路径.      * @param String nodeName 节点名称.     * @param String fileName 文件名.     */    public void read(String uri, String nodeName, String fileName) {        //判断 uri, nodeName, filename 合法性        try {            SAXParserFactory parserFactory = SAXParserFactory.newInstance(); //反射, parser 工厂实例            SAXParser parser = parserFactory.newSAXParser(); //反射            //事件处理            ParseHandler myhandler = new ParseHandler(nodeName, fileName);            parser.parse(uri, myhandler);        } catch (Exception e) {            e.printStackTrace();        }    }}public class ParseHandler extends DefaultHandler {    private String nodeName = null;    private String currentTag = null;    private Article article = new Article();    private BufferedWriter bufferedWriter = null;    public ParseHandler(String nodeName, String fileName) {        this.nodeName = nodeName;        try {            this.bufferedWriter = new BufferedWriter(new FileWriter(fileName));        } catch (Exception e) {            e.printStackTrace();        }    }    @Override    public void startDocument() throws SAXException {        System.out.println("开始解析 XML, 写入 TXT 文档!");    }    @Override    public void startElement(String uri, String localName, String qName, Attributes attr) throws SAXException {        if ("article".equals(qName)) { //从第一个标签开始顺序往下读取            article.setMDate(attr.getValue(0));            article.setKey(attr.getValue(1));        }        currentTag = qName;    }    @Override    public void characters(char[] ch, int start, int length) throws SAXException {         if (currentTag != null) {             String value = new String(ch, start, length);             switch(currentTag) { //判断起始标签                case "author":                    article.setAuthor(value);                    break;                case "title":                    article.setTitle(value);                    break;                case "pages":                    article.setPages(value);                    break;                case "year":                    article.setYear(value);                    break;                case "volume":                    article.setVolume(value);                    break;                case "journal":                    article.setJournal(value);                    break;                case "number":                    article.setNumber(value);                    break;                case "url":                    article.setUrl(value);                    break;                case "ee":                    article.setEE(value);                    break;                default:                    break;             }         }    }    @Override    public void endElement(String namespaceURI, String localName, String qName) throws SAXException {        if ("article".equals(qName)) {            try {                bufferedWriter.write(article.toString());                bufferedWriter.newLine();            } catch (IOException e) {                e.printStackTrace();            }        }        currentTag = null; //释放节点    }    @Override    public void endDocument() throws SAXException {        if (bufferedWriter != null) {            try {                bufferedWriter.flush();                bufferedWriter.close();            } catch (IOException e) {                e.printStackTrace();            }        }        System.out.println("XML 文档解析完成，请查看 TXT 文档!");    }}

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