com.jayway.jsonpath.JsonPath类的使用及代码示例

x33g5p2x  于2022-01-21 转载在 其他  
字(9.9k)|赞(0)|评价(0)|浏览(598)

本文整理了Java中com.jayway.jsonpath.JsonPath类的一些代码示例，展示了JsonPath类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。JsonPath类的具体详情如下：
包路径：com.jayway.jsonpath.JsonPath
类名称：JsonPath

JsonPath介绍

[英]JsonPath is to JSON what XPATH is to XML, a simple way to extract parts of a given document. JsonPath is available in many programming languages such as Javascript, Python and PHP.

JsonPath allows you to compile a json path string to use it many times or to compile and apply in one single on demand operation.

Given the Json document:

String json = 
"{ 
"store": 
{ 
"book": 
[ 
{ 
"category": "reference", 
"author": "Nigel Rees", 
"title": "Sayings of the Century", 
"price": 8.95 
}, 
{ 
"category": "fiction", 
"author": "Evelyn Waugh", 
"title": "Sword of Honour", 
"price": 12.99 
} 
], 
"bicycle": 
{ 
"color": "red", 
"price": 19.95 
} 
} 
}";

A JsonPath can be compiled and used as shown:

JsonPath path = JsonPath.compile("$.store.book[1]"); List<Object> books = path.read(json);
Or:

List<Object> authors = JsonPath.read(json, "$.store.book[*].author")

If the json path returns a single value (is definite):
String author = JsonPath.read(json, "$.store.book[1].author")
[中]JsonPath对于JSON就像XPATH对于XML一样，是提取给定文档部分的简单方法。JsonPath有多种编程语言，如Javascript、Python和PHP。
JsonPath允许您编译json路径字符串以多次使用它，或者在一次按需操作中编译并应用它。
给定Json文档：

String json = 
"{ 
"store": 
{ 
"book": 
[ 
{ 
"category": "reference", 
"author": "Nigel Rees", 
"title": "Sayings of the Century", 
"price": 8.95 
}, 
{ 
"category": "fiction", 
"author": "Evelyn Waugh", 
"title": "Sword of Honour", 
"price": 12.99 
} 
], 
"bicycle": 
{ 
"color": "red", 
"price": 19.95 
} 
} 
}";

可以编译并使用JsonPath，如图所示：
JsonPath path = JsonPath.compile("$.store.book[1]"); List<Object> books = path.read(json);
或：
List<Object> authors = JsonPath.read(json, "$.store.book[*].author")
如果json路径返回单个值（确定）：
String author = JsonPath.read(json, "$.store.book[1].author")

代码示例

代码示例来源：origin: Vedenin/useful-java-links

public  static void main(String[] args) {
  List<String> authors = JsonPath.read(json, "$.store.book[*].author");
  System.out.println("authors: " + authors); // print ["Nigel Rees","Evelyn Waugh","Herman Melville","J. R. R. Tolkien"]
  List<Map<String, Object>> expensiveBooks = JsonPath
      .using(Configuration.defaultConfiguration())
      .parse(json)
      .read("$.store.book[?(@.price > 22)].title", List.class);
  System.out.println(expensiveBooks); // print ["Hello, Middle-earth! "]
  System.out.println();
  String jsonHiWorld = "{\"message\":\"Hi\",\"place\":{\"name\":\"World!\"}}\"";
  String message = JsonPath.read(jsonHiWorld, "$.message");
  String place = JsonPath.read(jsonHiWorld, "$.place.name");
  System.out.println(message + " " + place); // print "Hi World!"
}

代码示例来源：origin: spring-projects/spring-framework

/**
 * Variant of {@link #evaluateJsonPath(String)} with a target type.
 * This can be useful for matching numbers reliably for example coercing an
 * integer into a double.
 * @param content the content to evaluate against
 * @return the result of the evaluation
 * @throws AssertionError if the evaluation fails
 */
public Object evaluateJsonPath(String content, Class<?> targetType) {
  try {
    return JsonPath.parse(content).read(this.expression, targetType);
  }
  catch (Throwable ex) {
    String message = "No value at JSON path \"" + this.expression + "\"";
    throw new AssertionError(message, ex);
  }
}

代码示例来源：origin: apache/incubator-druid

@Override
public Function<JsonNode, Object> makeJsonPathExtractor(final String expr)
{
 final JsonPath jsonPath = JsonPath.compile(expr);
 return node -> valueConversionFunction(jsonPath.read(node, JSONPATH_CONFIGURATION));
}

代码示例来源：origin: json-path/JsonPath

/**
 * @see JsonPath#isDefinite()
 */
public static boolean isPathDefinite(String path) {
  return compile(path).isDefinite();
}

代码示例来源：origin: json-path/JsonPath

@Test(expected = PathNotFoundException.class)
public void missing_prop() {
  //Object read = JsonPath.using(Configuration.defaultConfiguration().setOptions(Option.THROW_ON_MISSING_PROPERTY)).parse(DOCUMENT).read("$.store.book[*].fooBar");
  //Object read = JsonPath.using(Configuration.defaultConfiguration()).parse(DOCUMENT).read("$.store.book[*].fooBar");
  Object read2 = JsonPath.using(Configuration.defaultConfiguration().addOptions(Option.REQUIRE_PROPERTIES)).parse(DOCUMENT).read("$.store.book[*].fooBar.not");
}

代码示例来源：origin: spring-projects/spring-framework

/**
 * Evaluate the JSON path and return the resulting value.
 * @param content the content to evaluate against
 * @return the result of the evaluation
 * @throws AssertionError if the evaluation fails
 */
@Nullable
public Object evaluateJsonPath(String content) {
  try {
    return this.jsonPath.read(content);
  }
  catch (Throwable ex) {
    throw new AssertionError("No value at JSON path \"" + this.expression + "\"", ex);
  }
}

代码示例来源：origin: json-path/JsonPath

@Test
public void a_definite_path_can_be_returned_as_list() {
  Configuration conf = Configuration.builder().options(ALWAYS_RETURN_LIST).build();
  assertThat((List)using(conf).parse("{\"foo\" : \"bar\"}").read("$.foo")).isInstanceOf(List.class);
  assertThat((List)using(conf).parse("{\"foo\": null}").read("$.foo")).isInstanceOf(List.class);
  assertThat((List)using(conf).parse("{\"foo\": [1, 4, 8]}").read("$.foo")).asList()
      .containsExactly(Arrays.asList(1, 4, 8));
}

代码示例来源：origin: json-path/JsonPath

/**
 * {@inheritDoc}
 */
public JsonAsserter assertNotDefined(String path) {
  try {
    Configuration c = Configuration.defaultConfiguration();
    JsonPath.using(c).parse(jsonObject).read(path);
    throw new AssertionError(format("Document contains the path <%s> but was expected not to.", path));
  } catch (PathNotFoundException e) {
  }
  return this;
}

代码示例来源：origin: json-path/JsonPath

@Test
public void an_filter_can_update() {
  Object o = parse(JSON_DOCUMENT).set("$.store.book[?(@.display-price)].display-price", 1).json();
  List<Integer> result = parse(o).read("$.store.book[?(@.display-price)].display-price");
  assertThat(result).containsExactly(1, 1, 1, 1);
}

代码示例来源：origin: json-path/JsonPath

@Test
public void an_array_slice_can_be_updated() {
  List<String> res = parse(JSON_DOCUMENT).set("$.store.book[0:2]", "a").read("$.store.book[0:2]");
  assertThat(res).containsExactly("a", "a");
}

代码示例来源：origin: json-path/JsonPath

/**
 * Applies this JsonPath to the provided json input stream
 *
 * @param jsonInputStream input stream to read from
 * @param <T>             expected return type
 * @return list of objects matched by the given path
 * @throws IOException
 */
@SuppressWarnings({"unchecked"})
public <T> T read(InputStream jsonInputStream) throws IOException {
  return read(jsonInputStream, Configuration.defaultConfiguration());
}

代码示例来源：origin: json-path/JsonPath

@Test
public void last_token_defaults_to_null() {
  Configuration configuration = Configuration.builder().options(Option.DEFAULT_PATH_LEAF_TO_NULL).build();
  assertNull(JsonPath.parse(DOCUMENT, configuration).read("$.children[2].age"));
}

代码示例来源：origin: json-path/JsonPath

@Test
public void keys_in_root_containing_map_can_be_renamed(){
  Object o = parse(JSON_DOCUMENT).renameKey("$", "store", "new-store").json();
  List<Object> result = parse(o).read("$.new-store[*]");
  assertThat(result).isNotEmpty();
}

代码示例来源：origin: json-path/JsonPath

@Test
public void multi_prop_delete() {
  List<Map<String, Object>> res = parse(JSON_DOCUMENT).delete("$.store.book[*]['author', 'category']").read("$.store.book[*]['author', 'category']");
  assertThat(res).containsExactly(EMPTY_MAP, EMPTY_MAP, EMPTY_MAP, EMPTY_MAP);
}

代码示例来源：origin: json-path/JsonPath

@Test(expected = PathNotFoundException.class)
public void issue_22() throws Exception {
  Configuration configuration = Configuration.defaultConfiguration();
  String json = "{\"a\":{\"b\":1,\"c\":2}}";
  JsonPath.parse(json, configuration).read("a.d");
}

代码示例来源：origin: json-path/JsonPath

@Test
public void issue_143() {
  String json = "{ \"foo\": { \"bar\" : \"val\" }, \"moo\": { \"cow\" : \"val\" } }";
  Configuration configuration = Configuration.builder().options( Option.AS_PATH_LIST ).build();
  List<String> pathList = JsonPath.using(configuration).parse(json).read(JsonPath.compile("$.*.bar"));
  assertThat(pathList).containsExactly("$['foo']['bar']");
}

代码示例来源：origin: json-path/JsonPath

@Test
  public void isbn_is_defaulted_when_option_is_provided() {
    List<String> result1 = JsonPath.using(JSON_SMART_CONFIGURATION).parse(JSON_DOCUMENT).read("$.store.book.*.isbn");

    assertThat(result1).containsExactly("0-553-21311-3","0-395-19395-8");

    List<String> result2 = JsonPath.using(JSON_SMART_CONFIGURATION.addOptions(Option.DEFAULT_PATH_LEAF_TO_NULL)).parse(JSON_DOCUMENT).read("$.store.book.*.isbn");

    assertThat(result2).containsExactly(null, null, "0-553-21311-3", "0-395-19395-8");
  }
}

代码示例来源：origin: json-path/JsonPath

@Test
public void add_to_object() {
  Object res = parse(JSON_DOCUMENT).put("$.store.book[0]", "new-key", "new-value").read("$.store.book[0].new-key");
  assertThat(res).isEqualTo("new-value");
}

代码示例来源：origin: code4craft/webmagic

public JsonPathSelector(String jsonPathStr) {
  this.jsonPathStr = jsonPathStr;
  this.jsonPath = JsonPath.compile(this.jsonPathStr);
}

代码示例来源：origin: json-path/JsonPath

@Test
public void item_can_be_added_to_root_array() {
  List<Integer> model = new LinkedList<Integer>();
  model.add(1);
  model.add(2);
  List<Integer> ints = parse(model).add("$", 3).read("$");
  assertThat(ints).containsExactly(1,2,3);
}

内容来源于网络，如有侵权，请联系作者删除！

JsonPath

相关文章

    查看更多

    热门标签

    更多
    JavaquerypythonNode开发语言requestUtil数据库Table后端算法LoggerMessageElementParser

    最新文章

    更多
    • 蜀ICP备2022004421号-2 NULL123 https://www.null123.com © All rights reserved
    • 本站内容来源互联网,如果侵犯您的权益请联系我们删除, 联系方式：448109455@qq.com