Question

这是我目前遇到的问题。我的DAO类返回索引中的数据，但我想以JSON格式将所选数据返回给客户端。我该怎么办？

以json格式返回数据的控制器类。

MyController.java

@RequestMapping(value = "/ohlc",method = RequestMethod.POST)
public @ResponseBody List<OhlcResponse> getOhlc(@RequestBody OhlcRequest ohlcRequest) {
    List<OhlcResponse> ohlc = ohlcService.getOhlc(ohlcRequest);
    return ohlc;
}

Dao类通过执行存储过程返回4个数据（minprice，maxprice，closingprice和previousclosingprice）。

OhlcDaoImpl.java

public List<OhlcResponse> getOhlc(OhlcRequest ohlcRequest) {
    session = sessionFactory.openSession();

    SQLQuery q = session.createSQLQuery("EXEC uspGetOhlc :StockCode, :fromDate, :toDate");
            q.setString("StockCode",ohlcRequest.getStockSymbol());
            q.setDate("fromDate",ohlcRequest.getFromDate());
            q.setDate("toDate", ohlcRequest.getToDate());
    List<OhlcResponse> l = q.list();
    return l;
}

我的存储过程

USE WealthFeedSrv
GO
CREATE PROCEDURE uspGetOhlc
@StockCode varchar(50),   
@fromDate date,
@toDate date   
AS
BEGIN

SELECT  spd.ClosingPrice, spd.PreviousClosingPrice, spd.MinPrice, spd.MaxPrice
FROM StockPriceDetl spd
inner join Stock stk on stk.Id = spd.StockId
inner join StockPriceMast spm on spm.Id = spd.MastId
WHERE stk.StockSymbol= @StockCode AND spm.TranDate Between @fromDate and @toDate  
END
GO

我想要的pojo类返回绑定的数据。

OhlcResponse.java

public class OhlcResponse {
private BigDecimal MaxPrice;
private BigDecimal MinPrice;
private BigDecimal PreviousClosingPrice;
private BigDecimal ClosingPrice;

public BigDecimal getMaxPrice() {
    return MaxPrice;
}

public void setMaxPrice(BigDecimal maxPrice) {
    MaxPrice = maxPrice;
}

public BigDecimal getMinPrice() {
    return MinPrice;
}

public void setMinPrice(BigDecimal minPrice) {
    MinPrice = minPrice;
}

public BigDecimal getPreviousClosingPrice() {
    return PreviousClosingPrice;
}

public void setPreviousClosingPrice(BigDecimal previousClosingPrice) {
    PreviousClosingPrice = previousClosingPrice;
}

public BigDecimal getClosingPrice() {
    return ClosingPrice;
}

public void setClosingPrice(BigDecimal closingPrice) {
    ClosingPrice = closingPrice;
}

public OhlcResponse(){

}
}

我想要的结果

"maxPrice":"200",
"minPrice":"300",
"ClosingPrice":"400",
"PreviousClosingPrice":"500"

错误说无法转换为OhlcResponse。如何将OhlcDao返回的对象绑定到OhlcResponse类并返回JSON格式？

如何将对象列表转换为pojo类？

0 个答案: