Week 1-8: Spring Boot 学习计划完整项目

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

week8/src/main/java/com/learn/service/StudentServiceSelector.java

@@ -0,0 +1,49 @@
+package com.learn.service;
+
+import com.learn.entity.Student;
+import com.learn.service.jpa.StudentJpaService;
+import com.learn.service.mp.StudentMpService;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.data.domain.Page;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.Optional;
+
+@Service
+public class StudentServiceSelector {
+
+    private final StudentJpaService jpa;
+    private final StudentMpService mp;
+
+    @Value("${orm.mode:jpa}")
+    private String mode;
+
+    public StudentServiceSelector(StudentJpaService jpa, StudentMpService mp) {
+        this.jpa = jpa; this.mp = mp;
+    }
+
+    private boolean useJpa() { return !"mp".equalsIgnoreCase(mode); }
+
+    public Student add(Student s) { return useJpa() ? jpa.add(s) : mp.add(s); }
+
+    public List<Student> list() { return useJpa() ? jpa.list() : mp.list(); }
+
+    public Page<Student> listPage(int page, int size) {
+        return useJpa() ? jpa.listPage(page, size) : mp.listPage(page, size);
+    }
+
+    public Student getById(Long id) { return useJpa() ? jpa.getById(id) : mp.getById(id); }
+
+    public List<Student> search(String kw) { return useJpa() ? jpa.search(kw) : mp.search(kw); }
+
+    public Optional<Student> update(Long id, Student s) { return useJpa() ? jpa.update(id, s) : mp.update(id, s); }
+
+    public boolean delete(Long id) { return useJpa() ? jpa.delete(id) : mp.delete(id); }
+
+    public long count() { return useJpa() ? jpa.count() : mp.count(); }
+
+    public long countExcellent(int min) { return useJpa() ? jpa.countExcellent(min) : mp.countExcellent(min); }
+
+    public String getActiveMode() { return useJpa() ? "JPA" : "MyBatis-Plus"; }
+}