我使用Jackson生成JSON对象并将它们直接写入HTML的标记中,如下所示:
<script>
var data = $SomeJacksonWrapper.toJson($data);
</script>
如果某个字符串中包含'</script>'
,则此代码会中断。转义正斜杠(/)可以解决问题,并且它是由JSON的规范赋予的。
如何在杰克逊中启用它?
答案 0 :(得分:9)
使用 StaxMan 的回答,我最终得到了以下代码:
public class CustomCharacterEscapes extends CharacterEscapes {
private static final Logger log = Logger.getLogger(CustomCharacterEscapes.class);
private final int[] _asciiEscapes;
public CustomCharacterEscapes() {
_asciiEscapes = standardAsciiEscapesForJSON();
_asciiEscapes['/'] = CharacterEscapes.ESCAPE_STANDARD;
}
@Override
public int[] getEscapeCodesForAscii() {
return _asciiEscapes;
}
@Override
public SerializableString getEscapeSequence(int i) {
return null;
}
}
public class CustomObjectMapper extends ObjectMapper {
public CustomObjectMapper() {
this.getJsonFactory().setCharacterEscapes(new CustomCharacterEscapes());
}
}
答案 1 :(得分:8)
除了其他建议外,Jackson 1.8还具有“character escapes”功能,可以重新定义转义规则。缺少文档,但基本上你需要实现CharacterEscapes
(参见http://jackson.codehaus.org/1.8.2/javadoc/org/codehaus/jackson/io/CharacterEscape),注册JsonFactory(或直接注册JsonGenerator),然后根据你想要的规则进行转义。在这种情况下,您只需更改“/”的设置即可使用ESCAPE_STANDARD。
此外,您还可以添加功能请求以添加简单的开/关功能,因为这个特定的事情听起来也可能对其他人有用。但据我所知,尚未特别要求。
答案 2 :(得分:7)
感谢StaxMan和Infeligo的答案(欢呼伙伴)我找到了一种方法来提供/匹配(恕我直言)可怕的WCF DataContractJsonSerializer日期标准格式:
/Date(1328053610008+1100)/
需要使用反斜杠进行转义,从而导致以下内容:
\/Date(1328053610008+1100)\/
以防万一我可以帮助其他人使用我的CustomCharacterEscapes代码:
public class CustomCharacterEscapes extends CharacterEscapes {
private final int[] _asciiEscapes;
public CustomCharacterEscapes() {
_asciiEscapes = standardAsciiEscapesForJSON();
_asciiEscapes['/'] = CharacterEscapes.ESCAPE_CUSTOM;
}
@Override
public int[] getEscapeCodesForAscii() {
return _asciiEscapes;
}
@Override
public SerializableString getEscapeSequence(int i) {
if(i == '/'){
return new SerializableString() {
@Override
public String getValue() {
return "\\/";
}
@Override
public int charLength() {
return 2;
}
@Override
public char[] asQuotedChars() {
return new char[]{'\\','/'};
}
@Override
public byte[] asUnquotedUTF8() {
return new byte[]{'\\','/'};
}
@Override
public byte[] asQuotedUTF8() {
return new byte[]{'\\','/'};
}
};
}
else{
return null;
}
}
}