java - Java Servlet中Json字符串解析并插入数据库

Question

我是 JSON 新手。我在 jsp 中有一个动态 html 表，可以在单击按钮时添加行。我能够在 servlet 中接收 JSON 字符串，但无法对其进行解码。我想分割字符串并将数据插入数据库。我的 JSON 字符串如下所示:
[{"srno":"1","itemcode":"4545","type":"45454","subtype":"54","sku":"45","invqty":"54","invprice":"54","折扣":"5","总计":"45"},{"srno":"2","itemcode":"44","type":"54","子类型":"45","sku":"45","invqty":"4","invprice":"54","折扣":"54","总计":"5"}]

Answer 1

我相信这是使用 jackson 解析器的一种可能的解决方案。

如果你想使用这个库，你必须为该类创建自己的类并反序列化它。

你的类(class)可能是..

class MyJsonClass
{
    private String srno;
    private String itemcode;
    private String type;
    private String subtype;
    private String sku;
    private String invqty;
    private String invprice;
    private String discount;
    private String total;

    public String getSrno(){ return srno;}
    public void setSrno(String srno){ this.srno = srno;}
    public String getItemcode(){ return itemcode;}
    public void setItemcode(String itemcode){ this.itemcode = itemcode;}
    public String getType(){ return type;}
    public void setType(String type){ this.type = type;}
    public String getSubtype(){ return subtype;}
    public void setSku(String sku){ this.sku = sku;}
    public String getSku(){ return sku;}
    public void setSubtype(String subtype){ this.subtype = subtype;}
    public String getInvqty(){ return invqty;}
    public void setInvqty(String invqty){ this.invqty = invqty;}
    public String getInvprice(){ return invprice;}
    public void setInvprice(String invprice){ this.invprice = invprice;}
    public String getDiscount(){ return discount;}
    public void setDiscount(String discount){ this.discount = discount;}
    public String getTotal(){ return total;}
    public void setTotal(String total){ this.total = total;}


    @Override
    public String toString()
    {
        StringBuffer stbuf = new StringBuffer();
        stbuf.append("srno : ").append(srno);
        stbuf.append(" itemcode : ").append(itemcode);
        stbuf.append(" type : ").append(type);
        stbuf.append(" subtype : ").append(subtype);
        stbuf.append(" sku : ").append(sku);
        stbuf.append(" invqty : ").append(invqty);
        stbuf.append(" invprice : ").append(invprice);
        stbuf.append(" discount : ").append(discount);
        stbuf.append(" total : ").append(total);

        return stbuf.toString();

    }
}

然后，主入口代码可能如下所示。

public class MyBizParser {
    public static void main(String[] args)
    {
        String yourJson = 
            "["
            + "{\"srno\":\"1\",\"itemcode\":\"4545\",\"type\":\"45454\",\"subtype\":\"54\",\"sku\":\"45\",\"invqty\":\"54\",\"invprice\":\"54\",\"discount\":\"5\",\"total\":\"45\"},"
            + "{\"srno\":\"2\",\"itemcode\":\"44\",\"type\":\"54\",\"subtype\":\"45\",\"sku\":\"45\",\"invqty\":\"4\",\"invprice\":\"54\",\"discount\":\"54\",\"total\":\"5\"}"
            + "]";

        parsingIt(yourJson);
    }

    private static void parsingIt(String yourJson) {
        ObjectMapper objMapper = new ObjectMapper();

        try {
            MyJsonClass[] myObjects = objMapper.readValue(yourJson, MyJsonClass[].class);

            for(int i = 0; i < myObjects.length; i++)
                System.out.println(myObjects[i]);

        } catch (IOException e) {
            e.printStackTrace();
        }
    }


}

完成..好吧，输出必须是

我希望这是你想要的..