如何在Spring MVC中查询字符串与参数

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class QueryStringController {
    @GetMapping("/search")
    @ResponseBody
    public String search(@RequestParam(name = "query") String searchQuery) {
        // 这里处理查询逻辑
        return "Search results for: " + searchQuery;
    }
}

@GetMapping("/search")
@ResponseBody
public String searchWithOptionalParam(
    @RequestParam(name = "query", required = false, defaultValue = "none") String searchQuery
) {
    return "Search results for: " + searchQuery;
}
​

@GetMapping("/filter")
@ResponseBody
public String filterResults(
    @RequestParam String category,
    @RequestParam(required = false, defaultValue = "0") int page
) {
    return "Filtered results for category: " + category + " on page " + page;
}
​

public class UserCriteria {
    private String name;
    private int age;
    // getters and setters
}
@GetMapping("/users")
@ResponseBody
public String findUsers(@ModelAttribute UserCriteria criteria) {
    return "Users found with criteria: Name - " + criteria.getName() + ", age - " + criteria.getAge();
}