Spring MVC 3.0 下划线绑定请求参数

Question

Consider the following requirement: request parameters have to be bound to objects using Spring MVC 3.0. The request parameters contain underscores (eg http://myurl:80/x?param_one=1&param_two=2 ). These parameters should be bound to the following object:

class MyObject {
    private Integer paramOne;
    private Integer paramTwo;

    ...
}

How would you go about doing this?

Important note: consider that there may be a substantial amount of parameters and objects like this and that it's not considered good practice to define setter methods on the objects that include underscores.

Answer 1

Rajith's answer is for controller methods specifically, and doesn't address your question originally asking how to bind underscore parameters to an object.

The hacky solution I currently have in place is to accomplish what you are actually asking is to name my setters in this style:

public void setProject_ids(List<Long> project_ids) {

Note that RequestParam cannot be applied to methods, and it does not have an effect when applied to the argument of this setter.

Answer 2

You can do this using @RequestMapping attribute

@RequestParam(value = "param_One") String paramOne,@RequestParam(value = "param_two") String paramTwo

Add this into method signature

But for best practice its better to pass same variable name

Answer 3

Nine-years-later... I cleaner solution is to use constructor injection and annotate it with @ConstructorProperties . This way you can keep the class immutable and use Java naming convention.

@Value
class MyObject {
  Integer paramOne;
  Integer paramTwo;

  @ConstructorProperties({"param_one", "param_two"})
  MyObject(Integer paramOne, Integer paramTwo) {
    this.paramOne = paramOne;
    this.paramTwo = paramTwo;
  }

Even if you have a very long list of fields, you can generate the constructor and only need to write the annotation.