Redis实战之征服 Redis + Jedis + Spring （三）

一开始以为Spring下操作哈希表，列表，真就是那么土。恍惚间发现“stringRedisTemplate.opsForList()”的强大，抓紧时间恶补下。

通过spring-data-redis完成LINDEX, LLEN, LPOP, LPUSH, LRANGE, LREM, LSET, LTRIM, RPOP, RPUSH命令。其实还有一些命令，当前版本不支持。不过，这些List的操作方法可以实现队列，堆栈的正常操作，足够用了。

 

相关链接：

Redis实战

Redis实战之Redis + Jedis

Redis实战之征服 Redis + Jedis + Spring （一）

Redis实战之征服 Redis + Jedis + Spring （二）

Redis实战之征服 Redis + Jedis + Spring （三）

 

为了简便操作，我使用了StringRedisTemplate。用字符串操作做展示。当然，你可以继续使用RedisTemplate。

闲言少叙，上代码，一目了然：

 

/**
 * Mar 5, 2013
 */
package org.zlex.redis.support;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

/**
 *
 * @author snowolf
 * @version 1.0
 * @since 1.0
 */
@Component("listOps")
public class ListOps {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    /**
     * 压栈
     *
     * @param key
     * @param value
     * @return
     */
    public Long push(String key, String value) {
        return stringRedisTemplate.opsForList().leftPush(key, value);
    }

    /**
     * 出栈
     *
     * @param key
     * @return
     */
    public String pop(String key) {
        return stringRedisTemplate.opsForList().leftPop(key);
    }

    /**
     * 入队
     *
     * @param key
     * @param value
     * @return
     */
    public Long in(String key, String value) {
        return stringRedisTemplate.opsForList().rightPush(key, value);
    }

    /**
     * 出队
     *
     * @param key
     * @return
     */
    public String out(String key) {
        return stringRedisTemplate.opsForList().leftPop(key);
    }

    /**
     * 栈/队列长
     *
     * @param key
     * @return
     */
    public Long length(String key) {
        return stringRedisTemplate.opsForList().size(key);
    }

    /**
     * 范围检索
     *
     * @param key
     * @param start
     * @param end
     * @return
     */
    public List<String> range(String key, int start, int end) {
        return stringRedisTemplate.opsForList().range(key, start, end);
    }

    /**
     * 移除
     *
     * @param key
     * @param i
     * @param value
     */
    public void remove(String key, long i, String value) {
        stringRedisTemplate.opsForList().remove(key, i, value);
    }

    /**
     * 检索
     *
     * @param key
     * @param index
     * @return
     */
    public String index(String key, long index) {
        return stringRedisTemplate.opsForList().index(key, index);
    }

    /**
     * 置值
     *
     * @param key
     * @param index
     * @param value
     */
    public void set(String key, long index, String value) {
        stringRedisTemplate.opsForList().set(key, index, value);
    }

    /**
     * 裁剪
     *
     * @param key
     * @param start
     * @param end
     */
    public void trim(String key, long start, int end) {
        stringRedisTemplate.opsForList().trim(key, start, end);
    }
}

/**
 * Mar 5, 2013
 */
package org.zlex.redis.support;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

/**
 *
 * @author snowolf
 * @version 1.0
 * @since 1.0
 */
@Component("listOps")
public class ListOps {

    @Autowired
    private StringRedisTemplate stringRedisTemplate;

    /**
     * 压栈
     *
     * @param key
     * @param value
     * @return
     */
    public Long push(String key, String value) {
        return stringRedisTemplate.opsForList().leftPush(key, value);
    }

    /**
     * 出栈
     *
     * @param key
     * @return
     */
    public String pop(String key) {
        return stringRedisTemplate.opsForList().leftPop(key);
    }

    /**
     * 入队
     *
     * @param key
     * @param value
     * @return
     */
    public Long in(String key, String value) {
        return stringRedisTemplate.opsForList().rightPush(key, value);
    }

    /**
     * 出队
     *
     * @param key
     * @return
     */
    public String out(String key) {
        return stringRedisTemplate.opsForList().leftPop(key);
    }

    /**
     * 栈/队列长
     *
     * @param key
     * @return
     */
    public Long length(String key) {
        return stringRedisTemplate.opsForList().size(key);
    }

    /**
     * 范围检索
     *
     * @param key
     * @param start
     * @param end
     * @return
     */
    public List<String> range(String key, int start, int end) {
        return stringRedisTemplate.opsForList().range(key, start, end);
    }

    /**
     * 移除
     *
     * @param key
     * @param i
     * @param value
     */
    public void remove(String key, long i, String value) {
        stringRedisTemplate.opsForList().remove(key, i, value);
    }

    /**
     * 检索
     *
     * @param key
     * @param index
     * @return
     */
    public String index(String key, long index) {
        return stringRedisTemplate.opsForList().index(key, index);
    }

    /**
     * 置值
     *
     * @param key
     * @param index
     * @param value
     */
    public void set(String key, long index, String value) {
        stringRedisTemplate.opsForList().set(key, index, value);
    }

    /**
     * 裁剪
     *
     * @param key
     * @param start
     * @param end
     */
    public void trim(String key, long start, int end) {
        stringRedisTemplate.opsForList().trim(key, start, end);
    }
}

/**
 * Mar 5, 2013
 */
package org.zlex.redis.support;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

/**
 * 
 * @author snowolf
 * @version 1.0
 * @since 1.0
 */
@Component("listOps")
public class ListOps {

	@Autowired
	private StringRedisTemplate stringRedisTemplate;

	/**
	 * 压栈
	 * 
	 * @param key
	 * @param value
	 * @return
	 */
	public Long push(String key, String value) {
		return stringRedisTemplate.opsForList().leftPush(key, value);
	}

	/**
	 * 出栈
	 * 
	 * @param key
	 * @return
	 */
	public String pop(String key) {
		return stringRedisTemplate.opsForList().leftPop(key);
	}

	/**
	 * 入队
	 * 
	 * @param key
	 * @param value
	 * @return
	 */
	public Long in(String key, String value) {
		return stringRedisTemplate.opsForList().rightPush(key, value);
	}

	/**
	 * 出队
	 * 
	 * @param key
	 * @return
	 */
	public String out(String key) {
		return stringRedisTemplate.opsForList().leftPop(key);
	}

	/**
	 * 栈/队列长
	 * 
	 * @param key
	 * @return
	 */
	public Long length(String key) {
		return stringRedisTemplate.opsForList().size(key);
	}

	/**
	 * 范围检索
	 * 
	 * @param key
	 * @param start
	 * @param end
	 * @return
	 */
	public List<String> range(String key, int start, int end) {
		return stringRedisTemplate.opsForList().range(key, start, end);
	}

	/**
	 * 移除
	 * 
	 * @param key
	 * @param i
	 * @param value
	 */
	public void remove(String key, long i, String value) {
		stringRedisTemplate.opsForList().remove(key, i, value);
	}

	/**
	 * 检索
	 * 
	 * @param key
	 * @param index
	 * @return
	 */
	public String index(String key, long index) {
		return stringRedisTemplate.opsForList().index(key, index);
	}

	/**
	 * 置值
	 * 
	 * @param key
	 * @param index
	 * @param value
	 */
	public void set(String key, long index, String value) {
		stringRedisTemplate.opsForList().set(key, index, value);
	}

	/**
	 * 裁剪
	 * 
	 * @param key
	 * @param start
	 * @param end
	 */
	public void trim(String key, long start, int end) {
		stringRedisTemplate.opsForList().trim(key, start, end);
	}
}

 

 

 

这里说明下，例如LPUSH，RPUSH，其实就是从左边压栈，还是从右边压栈的不同命令。可以把堆栈看作是一个从左至右的数组。如果左边压栈，右边出栈，那就是队列的入队/出队操作；如果左边压栈，左边出栈，那就是堆栈操作。

 

举个具体的例子：

队列操作：LPUSH入队，RPOP出队，同理，可把L|R替换。

堆栈操作：LPUSH压栈，LPOP出栈，同理，可把L|R替换。

 

下面进行测试用例，初始、结束时，分别做入队、出队操作，期间进行堆栈，队列操作。不用我细说了，看测试用例，很简单！

 

/**
 * Mar 5, 2013
 */
package org.zlex.redis;

import static org.junit.Assert.*;

import java.util.List;

import org.junit.Before;
import org.junit.After;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.zlex.redis.support.ListOps;

/**
 *
 * @author snowolf
 * @version 1.0
 * @since 1.0
 */
public class ListOpsTest {
    private ApplicationContext app;
    private ListOps listOps;
    private String key = "queue";

    @Before
    public void before() throws Exception {
        app = new ClassPathXmlApplicationContext("applicationContext.xml");
        listOps = (ListOps) app.getBean("listOps");

        System.out.println("------------IN---------------");
        for (int i = 0; i < 5; i++) {
            String uid = "u" + i;
            System.out.println(uid);
            listOps.in(key, uid);
        }
    }

    @After
    public void after() {
        // ------------OUT---------------
        System.out.println("------------OUT---------------");
        long length = listOps.length(key);
        for (long i = 0; i < length; i++) {
            String uid = listOps.out(key);
            System.out.println(uid);
        }
    }

    @Test
    public void stack() {
        // ------------PUSH---------------
        String key = "stack";
        int len = 5;
        System.out.println("------------PUSH---------------");
        for (int i = 0; i < len; i++) {
            String uid = "u" + System.currentTimeMillis();
            System.out.println(uid);
            listOps.push(key, uid);
        }

        long length = listOps.length(key);
        assertEquals(len, length);

        // ------------POP---------------
        System.out.println("------------POP---------------");
        for (long i = 0; i < length; i++) {
            String uid = listOps.pop(key);
            System.out.println(uid);
        }
    }

    @Test
    public void index() {

        // -------------INDEX-------------
        String value = listOps.index(key, 3);
        assertEquals("u3", value);
    }

    @Test
    public void range() {
        // -------------RANGE-------------
        List<String> list = listOps.range(key, 3, 5);
        boolean result1 = list.contains("u3");
        assertEquals(true, result1);

        boolean result2 = list.contains("u1");
        assertEquals(false, result2);
    }

    @Test
    public void trim() {
        // ------------TRIM---------------
        List<String> list = listOps.range(key, 3, 5);
        listOps.trim(key, 3, 5);
        boolean result3 = list.contains("u1");
        assertEquals(false, result3);
    }

    @Test
    public void set() {
        // ------------SET-----------------
        List<String> list = listOps.range(key, 3, 5);
        listOps.set(key, 4, "ux4");
        boolean result4 = list.contains("u4");
        assertEquals(true, result4);

    }

    @Test
    public void remove() {
        // ------------REMOVE-----------------
        listOps.remove(key, 4, "u4");
        String value = listOps.index(key, 4);
        assertEquals(null, value);

    }
}

/**
 * Mar 5, 2013
 */
package org.zlex.redis;

import static org.junit.Assert.*;

import java.util.List;

import org.junit.Before;
import org.junit.After;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.zlex.redis.support.ListOps;

/**
 *
 * @author snowolf
 * @version 1.0
 * @since 1.0
 */
public class ListOpsTest {
    private ApplicationContext app;
    private ListOps listOps;
    private String key = "queue";

    @Before
    public void before() throws Exception {
        app = new ClassPathXmlApplicationContext("applicationContext.xml");
        listOps = (ListOps) app.getBean("listOps");

        System.out.println("------------IN---------------");
        for (int i = 0; i < 5; i++) {
            String uid = "u" + i;
            System.out.println(uid);
            listOps.in(key, uid);
        }
    }

    @After
    public void after() {
        // ------------OUT---------------
        System.out.println("------------OUT---------------");
        long length = listOps.length(key);
        for (long i = 0; i < length; i++) {
            String uid = listOps.out(key);
            System.out.println(uid);
        }
    }

    @Test
    public void stack() {
        // ------------PUSH---------------
        String key = "stack";
        int len = 5;
        System.out.println("------------PUSH---------------");
        for (int i = 0; i < len; i++) {
            String uid = "u" + System.currentTimeMillis();
            System.out.println(uid);
            listOps.push(key, uid);
        }

        long length = listOps.length(key);
        assertEquals(len, length);

        // ------------POP---------------
        System.out.println("------------POP---------------");
        for (long i = 0; i < length; i++) {
            String uid = listOps.pop(key);
            System.out.println(uid);
        }
    }

    @Test
    public void index() {

        // -------------INDEX-------------
        String value = listOps.index(key, 3);
        assertEquals("u3", value);
    }

    @Test
    public void range() {
        // -------------RANGE-------------
        List<String> list = listOps.range(key, 3, 5);
        boolean result1 = list.contains("u3");
        assertEquals(true, result1);

        boolean result2 = list.contains("u1");
        assertEquals(false, result2);
    }

    @Test
    public void trim() {
        // ------------TRIM---------------
        List<String> list = listOps.range(key, 3, 5);
        listOps.trim(key, 3, 5);
        boolean result3 = list.contains("u1");
        assertEquals(false, result3);
    }

    @Test
    public void set() {
        // ------------SET-----------------
        List<String> list = listOps.range(key, 3, 5);
        listOps.set(key, 4, "ux4");
        boolean result4 = list.contains("u4");
        assertEquals(true, result4);

    }

    @Test
    public void remove() {
        // ------------REMOVE-----------------
        listOps.remove(key, 4, "u4");
        String value = listOps.index(key, 4);
        assertEquals(null, value);

    }
}

/**
 * Mar 5, 2013
 */
package org.zlex.redis;

import static org.junit.Assert.*;

import java.util.List;

import org.junit.Before;
import org.junit.After;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.zlex.redis.support.ListOps;

/**
 * 
 * @author snowolf
 * @version 1.0
 * @since 1.0
 */
public class ListOpsTest {
	private ApplicationContext app;
	private ListOps listOps;
	private String key = "queue";

	@Before
	public void before() throws Exception {
		app = new ClassPathXmlApplicationContext("applicationContext.xml");
		listOps = (ListOps) app.getBean("listOps");

		System.out.println("------------IN---------------");
		for (int i = 0; i < 5; i++) {
			String uid = "u" + i;
			System.out.println(uid);
			listOps.in(key, uid);
		}
	}

	@After
	public void after() {
		// ------------OUT---------------
		System.out.println("------------OUT---------------");
		long length = listOps.length(key);
		for (long i = 0; i < length; i++) {
			String uid = listOps.out(key);
			System.out.println(uid);
		}
	}

	@Test
	public void stack() {
		// ------------PUSH---------------
		String key = "stack";
		int len = 5;
		System.out.println("------------PUSH---------------");
		for (int i = 0; i < len; i++) {
			String uid = "u" + System.currentTimeMillis();
			System.out.println(uid);
			listOps.push(key, uid);
		}

		long length = listOps.length(key);
		assertEquals(len, length);

		// ------------POP---------------
		System.out.println("------------POP---------------");
		for (long i = 0; i < length; i++) {
			String uid = listOps.pop(key);
			System.out.println(uid);
		}
	}

	@Test
	public void index() {

		// -------------INDEX-------------
		String value = listOps.index(key, 3);
		assertEquals("u3", value);
	}

	@Test
	public void range() {
		// -------------RANGE-------------
		List<String> list = listOps.range(key, 3, 5);
		boolean result1 = list.contains("u3");
		assertEquals(true, result1);

		boolean result2 = list.contains("u1");
		assertEquals(false, result2);
	}

	@Test
	public void trim() {
		// ------------TRIM---------------
		List<String> list = listOps.range(key, 3, 5);
		listOps.trim(key, 3, 5);
		boolean result3 = list.contains("u1");
		assertEquals(false, result3);
	}

	@Test
	public void set() {
		// ------------SET-----------------
		List<String> list = listOps.range(key, 3, 5);
		listOps.set(key, 4, "ux4");
		boolean result4 = list.contains("u4");
		assertEquals(true, result4);

	}

	@Test
	public void remove() {
		// ------------REMOVE-----------------
		listOps.remove(key, 4, "u4");
		String value = listOps.index(key, 4);
		assertEquals(null, value);

	}
}

 

 

回头继续整理，这个套路没错！

forward from http://blog.csdn.net/it_man/article/details/9730667