Flutter Uri.encodeFull()与Uri.encodeComponent()区别

说道区别我们先看一下官方的：

/**
   * Encode the string [component] using percent-encoding to make it
   * safe for literal use as a URI component.
   *
   * All characters except uppercase and lowercase letters, digits and
   * the characters `-_.!~*'()` are percent-encoded. This is the
   * set of characters specified in RFC 2396 and the which is
   * specified for the encodeUriComponent in ECMA-262 version 5.1.
   *
   * When manually encoding path segments or query components remember
   * to encode each part separately before building the path or query
   * string.
   *
   * For encoding the query part consider using
   * [encodeQueryComponent].
   *
   * To avoid the need for explicitly encoding use the [pathSegments]
   * and [queryParameters] optional named arguments when constructing
   * a [Uri].
   */
  static String encodeComponent(String component) {
    return _Uri._uriEncode(_Uri._unreserved2396Table, component, utf8, false);
  }

/**
   * Encode the string [uri] using percent-encoding to make it
   * safe for literal use as a full URI.
   *
   * All characters except uppercase and lowercase letters, digits and
   * the characters `!#$&'()*+,-./:;=?@_~` are percent-encoded. This
   * is the set of characters specified in in ECMA-262 version 5.1 for
   * the encodeURI function .
   */
  static String encodeFull(String uri) {
    return _Uri._uriEncode(_Uri._encodeFullTable, uri, utf8, false);
  }

Uri类提供了对字符串进行编码和解码的函数，以便在Uri中使用(您可能知道url)。这些函数处理uri特有的字符，例如&和=。Uri类还解析并公开Uri主机、端口、 协议等的组件。
编码和解码完整的uri
要对URI中具有特殊含义的字符(例如/、:、&、#)进行编码和解码，请使用encodeFull()和decodeFull()方法。这些方法适用于编码或解码完整的URI，保留完整的特殊URI字符。

其实主要就是保留字符的区别，看下面的输出就知道了

var uri = 'http://example.org/api?foo=some message';

var encoded = Uri.encodeFull(uri);
assert(encoded ==
    'http://example.org/api?foo=some%20message');

var decoded = Uri.decodeFull(encoded);
assert(uri == decoded);

注意，只有some和message中间的空格被编码

对URI组件进行编码和解码
要对URI中具有特殊含义的所有字符串字符进行编码和解码，包括(但不限于)/、&和:，请使用

encodeComponent()和decodeComponent()方法。
var uri = 'http://example.org/api?foo=some message';

var encoded = Uri.encodeComponent(uri);
assert(encoded ==
    'http%3A%2F%2Fexample.org%2Fapi%3Ffoo%3Dsome%20message');

var decoded = Uri.decodeComponent(encoded);
assert(uri == decoded);

注意每个特殊字符是如何编码的。例如，/被编码为%2F。