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Redis实战之征服 Redis + Jedis + Spring (三) 分类: 开源应用系统 2013-08-03 11:07 2136人阅读 评论(0) 收藏 举报 一开始以为Spring下操作

2015-02-04 10:14 1091 查看
分类: 开源应用系统2013-08-03
11:07 2136人阅读 评论(0) 收藏 举报

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:

Java代码



/**

* 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);

}

}

[java] view
plaincopy

/**

* 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!

Java代码



/**

* 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);

}

}

[java] view
plaincopy

/**

* 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!

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)
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