使用其余將表單數據存儲到文件中？

Question

我正在學習如何編寫REST API！ 如何使用Rest調用將表單值存儲到文本文件中？

index.html

<form action="rest/product/adddata" method="post">  
   Enter Id:<input type="text" name="id"/><br/><br/>  
   Enter Name:<input type="text" name="name"/><br/><br/>  
   Enter Price:<input type="text" name="price"/><br/><br/>  
   <input type="submit" value="Add Product"/>  
</form> 

service.java

@Path("/product")  
public class ProductService{  
    @POST  
    @Path("/adddata")  
    public Response addUser(  
        @FormParam("id") int id,  
        @FormParam("name") String name,  
        @FormParam("price") float price) {  

        return Response.status(200)  
            .entity(" Product added successfuly!<br> Id: "+id+"<br> Name: " + name+"<br> Price: "+price)  
            .build();  
    }  
}  

我想將id ， name和price值添加到文件中。 我需要在哪里編寫將數據添加到文件的功能？

Answer 1

將代碼寫入

public Response addUser(  
        @FormParam("id") int id,  
        @FormParam("name") String name,  
        @FormParam("price") float price) {  
        saveFile(id,name,price);

        return Response.status(200)  
            .entity(" Product added successfuly!<br> Id: "+id+"<br> Name: " + name+"<br> Price: "+price)  
            .build();  
    }  

將代碼寫入saveFile以保存到文件

Answer 2

最好的方法是創建另一個可以讀寫文件的類。 並在該其余端點中注入該類。

因為rest端點類中的直接代碼應用於處理不寫文件的請求

class FormSynchronizer {
    public static final File FORM_BASE = new File(...); // The location of directory which will contain all these files

    public void storeFile(Map map, String fileName){
        File toStoreFile = new File(FORM_BASE, fileName);
        /* Write code to store file */
    }
}

將該類注入您的其余端點類

public class ProductService{

    @Inject FormSynchronizer formSynchronizer;

    @POST  
    @Path("/adddata")  
    public Response addUser(  
        @FormParam("id") int id,  
        @FormParam("name") String name,  
        @FormParam("price") float price) {  

        Map<String, Object> data = new HashMap<>();
        data.put("id", id);
        /* put all data you want to store in this map */
        formSynchronizer.storeForm(data, "FORM_" + new Date().getTime()); // I used current time prefixed with 'FORM_' string as file name

        return Response.status(200)  
            .entity(" Product added successfuly!<br> Id: "+id+"<br> Name: " + name+"<br> Price: "+price)  
            .build();  
    }  
}    

使用傑克遜將地圖對象轉換為JSON文件，反之亦然。
映射到/從json文件