使用google的GSON处理JSON

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依赖jar包：

<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.2.2</version>
</dependency>

person.java

package com.eboy.testJSON;

public class person {
    private String url_3w;
    private int replyCount;
    private int hasImg;
    private String digest;
    private String url;
    private String docid;
    private String title;
    private int order;
    private int priority;
    private String lmodify; //有可能是日期类型
    private String subtitle;
    private String imgsrc;
    private String ptime; //有可能是日期类型
    public String getUrl_3w() {
        return url_3w;
    }
    public void setUrl_3w(String url_3w) {
        this.url_3w = url_3w;
    }
    public int getReplyCount() {
        return replyCount;
    }
    public void setReplyCount(int replyCount) {
        this.replyCount = replyCount;
    }
    public int getHasImg() {
        return hasImg;
    }
    public void setHasImg(int hasImg) {
        this.hasImg = hasImg;
    }
    public String getDigest() {
        return digest;
    }
    public void setDigest(String digest) {
        this.digest = digest;
    }
    public String getUrl() {
        return url;
    }
    public void setUrl(String url) {
        this.url = url;
    }
    public String getDocid() {
        return docid;
    }
    public void setDocid(String docid) {
        this.docid = docid;
    }
    public String getTitle() {
        return title;
    }
    public void setTitle(String title) {
        this.title = title;
    }
    public int getOrder() {
        return order;
    }
    public void setOrder(int order) {
        this.order = order;
    }
    public int getPriority() {
        return priority;
    }
    public void setPriority(int priority) {
        this.priority = priority;
    }
    public String getLmodify() {
        return lmodify;
    }
    public void setLmodify(String lmodify) {
        this.lmodify = lmodify;
    }
    public String getSubtitle() {
        return subtitle;
    }
    public void setSubtitle(String subtitle) {
        this.subtitle = subtitle;
    }
    public String getImgsrc() {
        return imgsrc;
    }
    public void setImgsrc(String imgsrc) {
        this.imgsrc = imgsrc;
    }
    public String getPtime() {
        return ptime;
    }
    public void setPtime(String ptime) {
        this.ptime = ptime;
    }
}

163.txt

Json.java:

package com.eboy.testJSON;

import java.io.BufferedInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.util.ArrayList;
import java.util.List;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

public class testJSON {

    /**
     * @param args
     */
    public static void main(String[] args) {
        PersonToJson(); //person对象转为json字符串
        System.out.println("-----------------------------------");
        JsonToPerson("163.txt"); //将json字符串解析为person对象
    }

    private static void JsonToPerson(String string) {
        Gson gson = new Gson();
        try{
            String str = ReadTxtFile("D:/163.txt");
            //System.out.println(str1);
            List<person> ps1 = gson.fromJson(str, new TypeToken<List<person>>(){}.getType());
            for (person p : ps1){
                System.out.println("Digest: " + p.getDigest());
                System.out.println("title: " + p.getTitle());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    private static void PersonToJson() {
        Gson gson = new Gson();
        List<person> ps = new ArrayList<person>();
        for (int i=0; i<10; i++){
            person p = new person();
            p.setUrl_3w("http://tech.163.com/12/0802/18/87U2O5HA000915BE.html");
            p.setReplyCount(42);
            p.setHasImg(1);
            p.setDigest("寻求小区通信垄断；据称贿赂已成当地潜规则。" + i);
            p.setUrl("http://3g.163.com/tech/12/0802/18/87U2O5HA000915BE.html");
            p.setDocid("87U2O5HA000915BE");
            p.setTitle("联通贿赂房企求垄断遭罚20万");
            p.setOrder(1);
            p.setPriority(79);
            p.setLmodify("2012-08-02 18:33:41");
            p.setSubtitle("已成当地“潜规则”");
            p.setImgsrc("http://img5.cache.netease.com/3g/2012/8/2/201208021859373be50.jpg");
            p.setPtime("2012-08-02 18:33:41");
            ps.add(p);
        }
        String str = gson.toJson(ps);
        System.out.println(str);
    }

    private static String ReadTxtFile(String FileName) throws Exception {
        BufferedInputStream bufferedInputStream = new BufferedInputStream(new FileInputStream(FileName));
        ByteArrayOutputStream memStream = new ByteArrayOutputStream();
        byte[] buffer = new byte[1024];
        int len = 0;
        while ((len = bufferedInputStream.read(buffer)) != -1){
            memStream.write(buffer, 0, len);
        }
        byte[] data = memStream.toByteArray();
        bufferedInputStream.close();
        memStream.close();
        bufferedInputStream.close();
        return new String(data);
    }

}

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2013-05-16 18:51
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