134 lines
4.4 KiB
Java
134 lines
4.4 KiB
Java
package com.learn.controller.jpa;
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import com.learn.entity.Student;
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import com.learn.service.jpa.StudentJpaService;
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import jakarta.validation.Valid;
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import org.springframework.data.domain.Page;
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import org.springframework.http.HttpStatus;
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import org.springframework.http.ResponseEntity;
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import org.springframework.web.bind.annotation.*;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* JPA 版本的学生管理 REST API
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*
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* 访问路径全部以 /api/jpa/students 开头，
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* 与 MyBatis-Plus 版本（/api/mp/students）区分，方便对比测试。
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*/
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@RestController
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@RequestMapping("/api/jpa/students")
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public class StudentJpaController {
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private final StudentJpaService service;
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public StudentJpaController(StudentJpaService service) {
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this.service = service;
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}
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/** 查询全部 / 搜索 */
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@GetMapping
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public ResponseEntity<Map<String, Object>> list(
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@RequestParam(required = false) String keyword) {
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java.util.List<Student> students;
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if (keyword != null && !keyword.trim().isEmpty()) {
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students = service.searchByKeyword(keyword);
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} else {
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students = service.list();
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}
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return ok(students);
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}
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/** 分页查询（第 5 天） */
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@GetMapping("/page")
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public ResponseEntity<Map<String, Object>> page(
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@RequestParam(defaultValue = "1") int pageNum,
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@RequestParam(defaultValue = "5") int pageSize) {
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Page<Student> page = service.page(pageNum, pageSize);
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Map<String, Object> result = new HashMap<>();
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result.put("code", 200);
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result.put("total", page.getTotalElements());
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result.put("pages", page.getTotalPages());
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result.put("current", page.getNumber() + 1);
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result.put("data", page.getContent());
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return ResponseEntity.ok(result);
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}
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/** 根据 ID 查询 */
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@GetMapping("/{id}")
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public ResponseEntity<Map<String, Object>> getById(@PathVariable Long id) {
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return service.getById(id)
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.map(s -> ok(s))
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.orElse(notFound(id));
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}
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/** 新增 */
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@PostMapping
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public ResponseEntity<Map<String, Object>> add(@Valid @RequestBody Student student) {
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Student saved = service.add(student);
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Map<String, Object> result = new HashMap<>();
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result.put("code", 201);
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result.put("message", "添加成功");
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result.put("data", saved);
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return ResponseEntity.status(HttpStatus.CREATED).body(result);
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}
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/** 更新 */
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@PutMapping("/{id}")
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public ResponseEntity<Map<String, Object>> update(
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@PathVariable Long id, @Valid @RequestBody Student student) {
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return service.update(id, student)
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.map(updated -> {
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Map<String, Object> result = new HashMap<>();
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result.put("code", 200);
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result.put("message", "更新成功");
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result.put("data", updated);
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return ResponseEntity.ok(result);
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})
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.orElse(notFound(id));
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}
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/** 删除 */
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@DeleteMapping("/{id}")
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public ResponseEntity<Map<String, Object>> delete(@PathVariable Long id) {
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if (service.delete(id)) {
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return ResponseEntity.ok(Map.of("code", 200, "message", "删除成功"));
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}
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return notFound(id);
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}
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/** 分数统计 */
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@GetMapping("/stats")
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public ResponseEntity<Map<String, Object>> stats(
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@RequestParam(defaultValue = "80") int min,
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@RequestParam(defaultValue = "100") int max) {
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long count = service.countByScoreRange(min, max);
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Map<String, Object> result = new HashMap<>();
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result.put("code", 200);
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result.put("range", min + "-" + max);
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result.put("count", count);
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return ResponseEntity.ok(result);
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}
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// ==================== 工具方法 ====================
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private ResponseEntity<Map<String, Object>> ok(Object data) {
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Map<String, Object> result = new HashMap<>();
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result.put("code", 200);
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result.put("data", data);
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return ResponseEntity.ok(result);
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}
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private ResponseEntity<Map<String, Object>> notFound(Long id) {
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Map<String, Object> error = new HashMap<>();
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error.put("code", 404);
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error.put("message", "学生不存在，ID: " + id);
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return ResponseEntity.status(HttpStatus.NOT_FOUND).body(error);
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}
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}
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