我在https://jsonstorage.net/api/items/0b0609e3-9d83-487f-b2e8-5ffdfae4723b上有一个托管的json文件，它可以作为响应：
[
{
"name":"Drop Biscuits and Sausage Gravy",
"ingredients":"Biscuits\n3 cups All-purpose Flour\n2 Tablespoons Baking Powder\n1/2 teaspoon Salt\n1-1/2 stick (3/4 Cup) Cold Butter, Cut Into Pieces\n1-1/4 cup Butermilk\n SAUSAGE GRAVY\n1 pound Breakfast Sausage, Hot Or Mild\n1/3 cup All-purpose Flour\n4 cups Whole Milk\n1/2 teaspoon Seasoned Salt\n2 teaspoons Black Pepper, More To Taste",
"url":"http://thepioneerwoman.com/cooking/2013/03/drop-biscuits-and-sausage-gravy/",
"image":"http://static.thepioneerwoman.com/cooking/files/2013/03/bisgrav.jpg",
"ts":{
"$date":1365276011104
},
"cookTime":"PT30M",
"source":"thepioneerwoman",
"recipeYield":"12",
"datePublished":"2013-03-11",
"prepTime":"PT10M",
"description":"Late Saturday afternoon, after Marlboro Man had returned home with the soccer-playing girls, and I had returned home with the..."
},
{
"name":"Hot Roast Beef Sandwiches",
"ingredients":"12 whole Dinner Rolls Or Small Sandwich Buns (I Used Whole Wheat)\n1 pound Thinly Shaved Roast Beef Or Ham (or Both!)\n1 pound Cheese (Provolone, Swiss, Mozzarella, Even Cheez Whiz!)\n1/4 cup Mayonnaise\n3 Tablespoons Grated Onion (or 1 Tbsp Dried Onion Flakes))\n1 Tablespoon Poppy Seeds\n1 Tablespoon Spicy Mustard\n1 Tablespoon Horseradish Mayo Or Straight Prepared Horseradish\n Dash Of Worcestershire\n Optional Dressing Ingredients: Sriracha, Hot Sauce, Dried Onion Flakes Instead Of Fresh, Garlic Powder, Pepper, Etc.)",
"url":"http://thepioneerwoman.com/cooking/2013/03/hot-roast-beef-sandwiches/",
"image":"http://static.thepioneerwoman.com/cooking/files/2013/03/sandwiches.jpg",
"ts":{
"$date":1365276013902
},
"cookTime":"PT20M",
"source":"thepioneerwoman",
"recipeYield":"12",
"datePublished":"2013-03-13",
"prepTime":"PT20M",
"description":"When I was growing up, I participated in my Episcopal church's youth group, and I have lots of memories of weekly meetings wh..."
}
]
我正在使用以下代码：
JSONPlaceHolderApi.kt
interface JSONPlaceHolderApi {
@GET("https://jsonstorage.net/api/items/0b0609e3-9d83-487f-b2e8-5ffdfae4723b ")
fun getAll() : Call<List<DataModel>>
@POST("https://jsonstorage.net/api/items/0b0609e3-9d83-487f-b2e8-5ffdfae4723b ")
@FormUrlEncoded
fun getName(@Field("name") name : String) : Call<List<DataModel>>
}
MainActivity.kt
private fun fetchAllNames(name : String) {
val client = RestUtil.instance.retrofit.create(JSONPlaceHolderApi::class.java)
val call = client.getName(name)
call.enqueue(object : Callback<List<DataModel>> {
override fun onResponse(call: Call<List<DataModel>>, response: Response<List<DataModel>>) {
if (response.body() != null) {
val recepts = response.body()
var stringBuilder = StringBuilder("")
recepts?.forEach {
stringBuilder.append(it.name)
stringBuilder.append("")
stringBuilder.append(it.ingredients)
stringBuilder.append("\n")
}
receptsName.text = stringBuilder.toString()
Log.d("receptname",stringBuilder.toString())
}
}
override fun onFailure(call: Call<List<DataModel>>, t: Throwable) {
t.printStackTrace()
}
})
}
我正在尝试创建一种方法，在该方法中我会说getIngredients（name：String），在其中键入名称并从该名称获取成分。因此，在这种情况下，它将返回如下内容：
"ingredients":"Biscuits\n3 cups All-purpose Flour\n2 Tablespoons Baking Powder\n1/2 teaspoon Salt\n1-1/2 stick (3/4 Cup) Cold Butter, Cut Into Pieces\n1-1/4 cup Butermilk\n SAUSAGE GRAVY\n1 pound Breakfast Sausage, Hot Or Mild\n1/3 cup All-purpose Flour\n4 cups Whole Milk\n1/2 teaspoon Seasoned Salt\n2 teaspoons Black Pepper, More To Taste"
答案 0 :(得分：0)
为了解析JSON，请查看以下网站：https://app.quicktype.io/
只需使用此类即可将JSON解析为对象：
https://app.quicktype.io/
// Converter.java
// To use this code, add the following Maven dependency to your project:
//
// com.fasterxml.jackson.core : jackson-databind : 2.9.0
//
// Import this package:
//
// import io.quicktype.Converter;
//
// Then you can deserialize a JSON string with
//
// ExampleStackOverflow[] data = Converter.fromJsonString(jsonString);
package io.quicktype;
import java.util.*;
import java.io.IOException;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.core.JsonProcessingException;
public class Converter {
// Serialize/deserialize helpers
public static ExampleStackOverflow[] fromJsonString(String json) throws IOException {
return getObjectReader().readValue(json);
}
public static String toJsonString(ExampleStackOverflow[] obj) throws JsonProcessingException {
return getObjectWriter().writeValueAsString(obj);
}
private static ObjectReader reader;
private static ObjectWriter writer;
private static void instantiateMapper() {
ObjectMapper mapper = new ObjectMapper();
reader = mapper.reader(ExampleStackOverflow[].class);
writer = mapper.writerFor(ExampleStackOverflow[].class);
}
private static ObjectReader getObjectReader() {
if (reader == null) instantiateMapper();
return reader;
}
private static ObjectWriter getObjectWriter() {
if (writer == null) instantiateMapper();
return writer;
}
}
// ExampleStackOverflow.java
package io.quicktype;
import java.util.*;
import com.fasterxml.jackson.annotation.*;
public class ExampleStackOverflow {
private String name;
private String ingredients;
private String url;
private String image;
private Ts ts;
private String cookTime;
private String source;
private String recipeYield;
private String datePublished;
private String prepTime;
private String description;
@JsonProperty("name")
public String getName() { return name; }
@JsonProperty("name")
public void setName(String value) { this.name = value; }
@JsonProperty("ingredients")
public String getIngredients() { return ingredients; }
@JsonProperty("ingredients")
public void setIngredients(String value) { this.ingredients = value; }
@JsonProperty("url")
public String getURL() { return url; }
@JsonProperty("url")
public void setURL(String value) { this.url = value; }
@JsonProperty("image")
public String getImage() { return image; }
@JsonProperty("image")
public void setImage(String value) { this.image = value; }
@JsonProperty("ts")
public Ts getTs() { return ts; }
@JsonProperty("ts")
public void setTs(Ts value) { this.ts = value; }
@JsonProperty("cookTime")
public String getCookTime() { return cookTime; }
@JsonProperty("cookTime")
public void setCookTime(String value) { this.cookTime = value; }
@JsonProperty("source")
public String getSource() { return source; }
@JsonProperty("source")
public void setSource(String value) { this.source = value; }
@JsonProperty("recipeYield")
public String getRecipeYield() { return recipeYield; }
@JsonProperty("recipeYield")
public void setRecipeYield(String value) { this.recipeYield = value; }
@JsonProperty("datePublished")
public String getDatePublished() { return datePublished; }
@JsonProperty("datePublished")
public void setDatePublished(String value) { this.datePublished = value; }
@JsonProperty("prepTime")
public String getPrepTime() { return prepTime; }
@JsonProperty("prepTime")
public void setPrepTime(String value) { this.prepTime = value; }
@JsonProperty("description")
public String getDescription() { return description; }
@JsonProperty("description")
public void setDescription(String value) { this.description = value; }
}
// Ts.java
package io.quicktype;
import java.util.*;
import com.fasterxml.jackson.annotation.*;
public class Ts {
private long date;
@JsonProperty("$date")
public long getDate() { return date; }
@JsonProperty("$date")
public void setDate(long value) { this.date = value; }
}
导入类后，请使用此
// ExampleStackOverflow [] data = Converter.fromJsonString（jsonString）;
解析您的JSON。
现在您有了一个普通的Java对象，您可以像在Java中一样在其中选择所需的任何字段