Question

大家好！我有一个关于在@RestController中使用@RequestParam的问题。我想知道如何从客户端获取@RequestParam。服务器代码（@RestController）：

@ResponseBody
@RequestMapping(method = RequestMethod.GET)
public ResponseEntity<List<ProjectBean>> getAllBeans(@RequestParam(name = "head") Integer headId) {
    Integer head = securityService.getLoggedAccountId();
    List<ProjectBean> projects = (List<ProjectBean>) projectService.getByHead(head);
    return new ResponseEntity<List<ProjectBean>>(projects, HttpStatus.OK);
}

和JSP / JavaScript：

function loadProjects() {
    $.ajax({
        url : 'rest/projects',
        method : 'GET',
        headers : {
            'Content-Type' : 'application/json',
        },
        success: function(data){
            $.each(data, function(index, project) {
                addProject(project);
            });
        }
    });
}

此函数会加载所有项目，但不会加载精确的headId

实体：

@Entity
@Table(name = "projects")

public class Project {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private int id;

    @Column(name = "project_name", nullable = false, length = 255)
    private String projectName;

    @Column(name="head")
    private Integer head; //need to get projects with this value

    @Column(name = "description")
    private String description;

    @Column(name = "photo")
    private String photo;

    @Column(name = "status", nullable = false, length = 200)
    private String status;
}

Answer 1

在我看来，推荐@ NayoR的建议。但实际上你需要在js中使用查询字符串，例如：

function loadProjects() {
    $.ajax({
        url : 'rest/projects?head=' + headId,
        method : 'GET',
        headers : {
            'Content-Type' : 'application/json',
        },
        success: function(data){
            $.each(data, function(index, project) {
                addProject(project);
            });
        }
    });
}

Answer 2

您可以在@RequestMapping注释中设置路径;

@RequestMapping(method = RequestMethod.GET, path = "rest/projects/{head}")

或使用@GetMapping注释：

@GetMapping(path = "rest/projects/{head}")

并使用@PathVariable("head")代替@RequestParam(name = "head")

对于Javascript部分，您应在网址中指定head：

function loadProjects(head) {
    $.ajax({
        url : 'rest/projects/' + head,
        method : 'GET',
        headers : {
            'Content-Type' : 'application/json',
        },
        success: function(data){
            $.each(data, function(index, project) {
                addProject(project);
            });
        }
    });
}

如何在JSP文件中处理@RequestParam？

2 个答案: