使用NoSQL数据库（二）：MongoDB

Chapter3-2-6/src/main/java/com/didispace/Application.java

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+package com.didispace;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class Application {
+
+	public static void main(String[] args) {
+		SpringApplication.run(Application.class, args);
+	}
+
+}

Chapter3-2-6/src/main/java/com/didispace/domain/User.java

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+package com.didispace.domain;
+
+import org.springframework.data.annotation.Id;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @date 16/4/27 下午10:04.
+ * @blog http://blog.didispace.com
+ */
+public class User {
+
+    @Id
+    private Long id;
+
+    private String username;
+    private Integer age;
+
+    public User(Long id, String username, Integer age) {
+        this.id = id;
+        this.username = username;
+        this.age = age;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public Integer getAge() {
+        return age;
+    }
+
+    public void setAge(Integer age) {
+        this.age = age;
+    }
+}

Chapter3-2-6/src/main/java/com/didispace/domain/UserRepository.java

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+package com.didispace.domain;
+
+import org.springframework.data.mongodb.repository.MongoRepository;
+
+/**
+ * @author 程序猿DD
+ * @version 1.0.0
+ * @date 16/4/27 下午10:16.
+ * @blog http://blog.didispace.com
+ */
+public interface UserRepository extends MongoRepository<User, Long> {
+
+    User findByUsername(String username);
+
+}

Chapter3-2-6/src/main/resources/application.properties

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+spring.data.mongodb.uri=mongodb://name:pass@localhost:27017/test
+
+

Chapter3-2-6/src/test/java/com/didispace/ApplicationTests.java

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+package com.didispace;
+
+import com.didispace.domain.User;
+import com.didispace.domain.UserRepository;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(Application.class)
+public class ApplicationTests {
+
+	@Autowired
+	private UserRepository userRepository;
+
+	@Before
+	public void setUp() {
+		userRepository.deleteAll();
+	}
+
+	@Test
+	public void test() throws Exception {
+
+		// 创建三个User，并验证User总数
+		userRepository.save(new User(1L, "didi", 30));
+		userRepository.save(new User(2L, "mama", 40));
+		userRepository.save(new User(3L, "kaka", 50));
+		Assert.assertEquals(3, userRepository.findAll().size());
+
+		// 删除一个User，再验证User总数
+		User u = userRepository.findOne(1L);
+		userRepository.delete(u);
+		Assert.assertEquals(2, userRepository.findAll().size());
+
+		// 删除一个User，再验证User总数
+		u = userRepository.findByUsername("mama");
+		userRepository.delete(u);
+		Assert.assertEquals(1, userRepository.findAll().size());
+
+	}
+
+}