您将需要 jackson-databind ) 和 YAMLFactory (来自 jackson-dataformat-yaml )

You will need ObjectMapper (from jackson-databind) and YAMLFactory (from jackson-dataformat-yaml).

ObjectMapper objectMapper = new ObjectMapper(new YAMLFactory());

这很容易:只需读取YAML文件，修改内容并写入YAML文件.

Then it is easy: just read the YAML file, modify the contents, and write the YAML file.

由于示例中的对象结构非常简单， 您可能更喜欢使用Map<String, Object>进行快速建模.

Because you have a very simple object structure in your example, you may prefer a quick-and-dirty modeling by using Map<String, Object>.

// read YAML file
Map<String, Object> user = objectMapper.readValue(new File("user.yaml"),
            new TypeReference<Map<String, Object>>() { });

// modify the address
Map<String, Object> address = (Map<String, Object>) user.get("address");
address.put("line1", "Your address line 1");
address.put("line2", "Your address line 2");
address.put("city", "Bangalore");
address.put("zip", 560010);

// write YAML file
objectMapper.writeValue(new File("user-modified.yaml"), user);

如果您的对象结构更复杂， 那你应该做一个更面向对象的建模 通过编写一些 POJO 类(User和Address). 但是总体思路还是一样的:

If you would have a more complex object structure, then you should do a more object-oriented modeling by writing some POJO classes (User and Address). But the general idea is still the same:

// read YAML file
User user = objectMapper.readValue(new File("user.yaml"), User.class);

// modify the address
Address address = user.getAddress();
address.setLine1("Your address line 1");
address.setLine2("Your address line 2");
address.setCity("Bangalore");
address.setZip(560010);

// write YAML file
objectMapper.writeValue(new File("user-modified.yaml"), user);