澳门新葡萄京官网注册几个数组的排序结果比较

【错误原因】:mysql_query执行超时.
【解决办法】:修改php.ini中的
max_execution_time的值,默认为300,单位是秒,例如:
;max_execution_time = 300
;将其改为: max_execution_time = 3000
最后,重新启动服务管理器即可~

 

其实在php文档里有说明upload_max_filesize的可修改范围是PHP_INI_PERDIR。
PHP_INI_PERDIR的意思是域内指令可以在php.ini、httpd.conf或.htaccess文件中修改。
PHP_INI_SYSTEM 域内指令可以在php.ini和httpd.conf文件中修改
所以upload_max_filesize用int_set是无法修改的。只有可修改范围是PHP_INI_ALL的才可以用int_set修改。

 1 package algorithm.study.demo2;
 2 
 3 
 4 /**
 5  * This class implement MergeSort
 6  * 
 7  * @author ygh 2017年2月23日
 8  */
 9 public class MergeSort {
10 
11     /**
12      * Arithmetic thoughts: If we want to sort a array elements,we can sort their left,then sort
13      * their right. In the left array, we can use same thought separate the left array to halt then
14      * sort them..... At last,it will change into tow number compare,then merge
15      * 
16      * @param arr The array need to sort
17      * @param A temporary array to store elements that have sorted,its length is right-left
18      * 
19      * @param left The left index of elements you want to sort in this array
20      * @param right The right index of elements you want to sort in this array
21      */
22     public static void mergeSort(int[] sortedArr, int[] tmpArr, int left, int right) {
23         if (left < right) {
24             int mid = (left + right) / 2;
25             mergeSort(sortedArr, tmpArr, left, mid);
26             mergeSort(sortedArr, tmpArr, mid + 1, right);
27             merge(sortedArr, tmpArr, left, mid, right);
28             copy(sortedArr, tmpArr, left, right);
29         }
30     }
31 
32     /**
33      * Copy elements from temporary array to sorted array. The index range is from left to rigth
34      * 
35      * @param haltSortedArr The array need to sort
36      * @param tmpArr The temporary array
37      * @param left The left index
38      * @param right The right index
39      */
40     private static void copy(int[] haltSortedArr, int[] tmpArr, int left, int right) {
41         for (int i = left; i <= right; i++) {
42             haltSortedArr[i] = tmpArr[i];
43         }
44     }
45 
46     /**
47      * This method is to merge elements from haltSortedArr.now the haltSortedArr has became sorted
48      * half by half.The elements' index from left to mid is sorted,and the elements' index from mid
49      * to right is sorted.So we just need to merge it to get all order array
50      * 
51      * @param haltSortedArr The array has became sorted half by half
52      * @param tmpArr A temporary array to store elements order.
53      * @param left The left index of elements you want to sort in this array
54      * @param mid The order element separator index
55      * @param right The right index of elements you want to sort in this array
56      */
57     private static void merge(int[] haltSortedArr, int[] tmpArr, int left, int mid, int right) {
58         int i = left;
59         int j = mid + 1;
60         int d = left;
61         while (i <= mid && j <= right) {
62             if (haltSortedArr[i] <= haltSortedArr[j]) {
63                 tmpArr[d++] = haltSortedArr[i++];
64             } else {
65                 tmpArr[d++] = haltSortedArr[j++];
66             }
67         }
68 
69         if (i > mid) {// If i more mid,indicate some elements have not be put in temporary array in
70                       // array right
71             while (j <= right) {
72                 tmpArr[d++] = haltSortedArr[j++];
73             }
74         } else {// If i less mid,indicate some elements have not be put in temporary array in array
75                 // left
76             while (i <= mid) {
77                 tmpArr[d++] = haltSortedArr[i++];
78             }
79         }
80     }
81 
82 }

实例设置max_execution_time

The size of array sorted is:9 The max value is permited is:999999
java.util.Arrays.sort execute time: 0
algorithm.study.demo2.MergeSort.mergeSort execute time: 0
algorithm.study.demo2.QuickSort.quickSort execute time: 0

注意:

 1 package algorithm.study.demo2;
 2 
 3 
 4 
 5 /**
 6  * 
 7  * This class is to implement shell sort
 8  * @author ygh
 9  * 2017年2月27日
10  */
11 public class ShellSort {
12 
13     /**
14      * Shell sort
15      * @param arr The array need to sort
16      * @param gaps The gaps set in it
17      */
18     public static void  shellSort(int[] arr, int[] gaps) {
19         for (int i = 0; i < gaps.length; i++) {
20             shellInsert(arr, gaps[i]);
21         }
22     }
23 
24     /**
25      * Insert sort for array by gap
26      * @param arr The sorted array
27      * @param gap The gap
28      */
29     private static void shellInsert(int[] arr, int gap) {
30         int i, j, tmp;
31         for (i = gap; i < arr.length; i++) {
32             if (arr[i] < arr[i - gap]) {
33                 tmp = arr[i];
34                 for (j = i - gap; j >= 0 && tmp < arr[j]; j = j - gap) {
35                     arr[j + gap] = arr[j];
36                 }
37                 arr[j + gap] = tmp;
38             }
39         }
40     }
41     
42 }

ini_set(‘max_execution_time’,’10′);
ini_set(‘memory_limit’,’1024M’);

MergeSort(归并排序)

<?
 $old_max_execution_time = ini_set(‘max_execution_time’, 120);
   echo “old timeout is $old_max_execution_time <br />”;

the size is very big,shell sort take to long time,so give it up

 代码如下

  1 package algorithm.study.utils;
  2 
  3 import java.lang.reflect.Method;
  4 
  5 /**
  6  * This class is getting a method execute time and provide some other functions.
  7  * 
  8  * @author ygh 2017年2月24日
  9  */
 10 public class MethodExecuteTimeUtils {
 11 
 12     /**
 13      * Get a method execute time using millisecond and cancel method's print return result and
 14      * execute time.
 15      * 
 16      * @param bean The method is in this bean
 17      * @param params The parameter the method execute need
 18      * @param methodName The name of the method
 19      * @param types The parameter type of the method
 20      * @return The execute time of this method
 21      * @throws Exception If <code>getMethod</code> or <code>invoke</code> fail.
 22      */
 23     public static long getMethodExecuteTime(Object bean, Object[] params, String methodName, Class<?>[] types)
 24             throws Exception {
 25         return getMethodExecuteTime(bean, params, methodName, types, false, false);
 26     }
 27 
 28     /**
 29      * Get a method execute time using millisecond and cancel print method's return result.
 30      * 
 31      * @param bean The method is in this bean
 32      * @param params The parameter the method execute need
 33      * @param methodName The name of the method
 34      * @param types The parameter type of the method
 35      * @param isPrintExecutetime Whether print the execute time in console, true is print false not
 36      * @param isViewMehtodResult Whether print the return result in console, true is print false not
 37      * @return The execute time of this method
 38      * @throws Exception If <code>getMethod</code> or <code>invoke</code> fail.
 39      */
 40     public static long getMethodExecuteTime(Object bean, Object[] params, String methodName,
 41             Class<?>[] types, boolean isPrintExecutetime) throws Exception {
 42         return getMethodExecuteTime(bean, params, methodName, types, isPrintExecutetime, false);
 43     }
 44 
 45     /**
 46      * Get a method execute time using millisecond and add some other service.
 47      * 
 48      * @param bean The method is in this bean
 49      * @param params The parameter the method execute need
 50      * @param methodName The name of the method
 51      * @param types The parameter type of the method
 52      * @param isPrintExecutetime Whether print the execute time in console, true is print false not
 53      * @param isViewMehtodResult Whether print the return result in console, true is print false not
 54      * @return The execute time of this method
 55      * @throws Exception If <code>getMethod</code> or <code>invoke</code> fail.
 56      */
 57     public static long getMethodExecuteTime(Object bean, Object[] params, String methodName,
 58             Class<?>[] types, boolean isPrintExecutetime, boolean isViewMehtodResult) throws Exception {
 59         Class<?> clazz;
 60         long executeTime = -1L;
 61         boolean isAccessiable = false;
 62         Method method = null;
 63         //determine bean is a instance or a Class<?>
 64         if (bean instanceof Class<?>) {
 65             clazz = (Class<?>) bean;
 66         } else {
 67             clazz = bean.getClass();
 68         }
 69         try {
 70             if (types == null) {
 71                 method = clazz.getDeclaredMethod(methodName);
 72             } else {
 73                 method = clazz.getDeclaredMethod(methodName, types);
 74             }
 75             isAccessiable = method.isAccessible();
 76             if (!isAccessiable) {
 77                 method.setAccessible(true);
 78             }
 79 
 80             if (isViewMehtodResult) {
 81                 executeTime = getReturnMethodExecuteTime(bean, params, method);
 82             } else {
 83                 executeTime = getMethodExecuteTime(bean, params, method);
 84             }
 85             method.setAccessible(isAccessiable);
 86             if (isPrintExecutetime) {
 87                 printExecute(clazz, methodName, executeTime);
 88             }
 89         } catch (Exception e) {
 90             throw new Exception("excute method fail");
 91         }
 92         return executeTime;
 93     }
 94 
 95     /**
 96      * Get a method execute time, use millisecond. We don't think the method whether has a return
 97      * result
 98      * 
 99      * @param bean The method is in this bean
100      * @param params The parameters the method execute need
101      * @param method The Method entity
102      * @return The millisecond the method execute spend
103      * @throws Exception If the method invoke fail
104      */
105     private static long getMethodExecuteTime(Object bean, Object[] params, Method method) throws Exception {
106         long startTime = System.currentTimeMillis();
107         method.invoke(bean, params);
108         long endTime = System.currentTimeMillis();
109         return endTime - startTime;
110     }
111 
112     /**
113      * Get a method execute time, use millisecond. The method must has a return result will input
114      * the return result in console ,If the method has not return result, please call
115      * <code>getMethodExecuteTime</code> method.
116      * 
117      * @param bean The method is in this bean
118      * @param params The parameters the method execute need
119      * @param method The Method entity
120      * @return The millisecond the method execute spend
121      * @throws Exception If the method invoke fail
122      */
123     private static long getReturnMethodExecuteTime(Object bean, Object[] params, Method method)
124             throws Exception {
125         long startTime = System.currentTimeMillis();
126         Object result = (Object) method.invoke(bean, params);
127         long endTime = System.currentTimeMillis();
128         if (result != null) {
129             System.out.println("result input:" + result.toString());
130         } else {
131             System.out.println("Warning:" + bean.getClass().getName() + "." + method.getName()
132                     + "has not return " + "result,please setting the isViewMehtodResult as false");
133         }
134         return endTime - startTime;
135     }
136 
137     /**
138      * Print the execute time of method
139      * 
140      * @param methodName The name of the method
141      * @param time The execute of the method
142      */
143     public static void printExecute(Class<?> clazz, String methodName, long time) {
144         System.out.println(clazz.getName() + "." + methodName + " execute time: " + time);
145     }
146 }

post_max_size,upload_max_filesize用下面的方法是修改不了的.
ini_set(‘post_max_size’,’1024M’);
ini_set(‘upload_max_filesize’,’1024M’);

algorithm.study.demo2.ShellSort.shellSort execute time: 85

The size of array sorted is:99999 The max value is permited is:999999
java.util.Arrays.sort execute time: 57
algorithm.study.demo2.MergeSort.mergeSort execute time: 21
algorithm.study.demo2.QuickSort.quickSort execute time: 19

ini_set(‘max_execution_time’,’10′);
ini_set(‘memory_limit’,’1024M’);

测试结果:使用毫秒值:

 代码如下

 

正确做法是用.htaccess文件:

algorithm.study.demo2.ShellSort.shellSort execute time: 6125

The size of array sorted is:999999 The max value is permited is:999999
java.util.Arrays.sort execute time: 115
algorithm.study.demo2.MergeSort.mergeSort execute time: 201
algorithm.study.demo2.QuickSort.quickSort execute time: 191

magic_quotes_gpc 用 get_magic_quotes_gpc() 获得,不能用
set_magic_quotes_gpc
修改,原因是没这个函数。而magic_quotes_runtime可以用set_magic_quotes_runtime()来设置

构造随机数组的工具类:

php_value upload_max_filesize “80M”
php_value post_max_size “80M”
php_value max_execution_time “2000″
php_value memory_limit “150M”

测试方法的执行时间的工具类:

echo ‘max_execution_time = ‘ . ini_get(‘max_execution_time’) . ”
“;
echo ‘memory_limit = ‘ . ini_get(‘memory_limit’) . ”
“;
echo ‘post_max_size = ‘ . ini_get(‘post_max_size’) . ”
“;
echo ‘upload_max_filesize = ‘ . ini_get(‘upload_max_filesize’) .

“;

  1 package algorithm.study.demo2;
  2 
  3 import java.util.Arrays;
  4 
  5 import org.junit.Test;
  6 
  7 import algorithm.study.utils.ArraysTools;
  8 import algorithm.study.utils.MethodExecuteTimeUtils;
  9 
 10 public class SortMethodTest {
 11     
 12     
 13     @Test
 14     public void fun1() throws Exception{
 15        int maxValue=999999;
 16        int[] sizes = getSize(1,7);
 17        for(int i=0;i<sizes.length;i++){
 18            System.out.println("The size of array sorted is:"+sizes[i]
 19                    +" The max value is permited is:"+maxValue);
 20            testSort(sizes[i],maxValue);
 21            System.out.println("===============================================");
 22        }
 23     }
 24 
 25     public void testSort(int size,int maxValue) throws Exception{
 26         int[] arr1 = ArraysTools.getRandomArray(size, maxValue);
 27         int[] arr2 = Arrays.copyOf(arr1, size);
 28         int[] arr3 = Arrays.copyOf(arr1, size);
 29         int[] arr4 = Arrays.copyOf(arr1, size);
 30         testJavaSort(arr1);
 31         testMergeSort(arr2);
 32         testQuickSort(arr3);
 33         if(size<999999){
 34             testShellSort(arr4);
 35         }else{
 36             System.out.println("the size is very big,shell sort take to long time,so give it up");
 37         }
 38 //        ArraysTools.toStringIntArray(arr1);
 39 //        ArraysTools.toStringIntArray(arr2);
 40 //        ArraysTools.toStringIntArray(arr3);
 41 //        ArraysTools.toStringIntArray(arr4);
 42     }
 43     
 44     
 45     
 46     /**
 47      * Test merge sort
 48      * @param arr The array sorted
 49      * @throws Exception If method execute failing
 50      */
 51     public void testMergeSort(int[] arr) throws Exception{
 52         MergeSort bean = new MergeSort();
 53         Class<?>[] types = {int[].class,int[].class,int.class,int.class};
 54         String methodName = "mergeSort";
 55         int[] tmp = new int[arr.length];
 56         Object[] params={arr,tmp,0,arr.length-1};
 57         MethodExecuteTimeUtils.getMethodExecuteTime(bean, params, methodName, types, true);
 58     }
 59     
 60     /**
 61      * Test quick sort
 62      * @param arr The array sorted
 63      * @throws Exception If method execute failing
 64      */
 65     public void testQuickSort(int[] arr) throws Exception{
 66         QuickSort bean = new QuickSort();
 67         Class<?>[] types = {int[].class,int.class,int.class};
 68         String methodName = "quickSort";
 69         Object[] params={arr,0,arr.length-1};
 70         MethodExecuteTimeUtils.getMethodExecuteTime(bean, params, methodName, types, true);
 71     }
 72     
 73     /**
 74      * Test shell sort
 75      * @param arr The array sorted
 76      * @throws Exception If method execute failing
 77      */
 78     public void testShellSort(int[] arr) throws Exception{
 79         ShellSort bean = new ShellSort();
 80         Class<?>[] types = {int[].class,int[].class};
 81         String methodName = "shellSort";
 82         int[] gaps = getGaps(arr.length);
 83         Object[] params={arr,gaps};
 84         MethodExecuteTimeUtils.getMethodExecuteTime(bean, params, methodName, types, true);
 85     }
 86     
 87     /**
 88      * 
 89      * This is a method to test how long time the javaself sort method spend on
 90      * @param arr The array need to sort
 91      * @throws Exception If method execute failing
 92      */
 93     public void testJavaSort(int[] arr) throws Exception{
 94         Class<?>[] types = {int[].class};
 95         String methodName = "sort";
 96         Object[] params = {arr};
 97         MethodExecuteTimeUtils.getMethodExecuteTime(Arrays.class, params, methodName, types,true);
 98     }
 99     
100     
101     /**
102      * Get gaps for shell sort
103      * @param size
104      * @return
105      */
106     private int[] getGaps(int size){
107         int[] gaps;
108         if(size>1000){
109             gaps = new int[15];
110             for(int i=1;i<=15;i++){
111                 gaps[i-1]=i;
112             }
113         }else{
114             gaps = new int[5];
115             for(int i=1;i<=5;i++){
116                 gaps[i-1]=i;
117             }
118         }
119         return gaps;
120     }
121     
122     /**
123      * get array like [9, 99, 999, 9999, 99999, 999999, 9999999]
124      * @param start the first number is how many "9",the value of it must more or equal 0
125      * @param length The length of array
126      * @return A Integer array 
127      */
128     private int[] getSize(int start,int length){
129         int[] arr = new int[length];
130         int tmp=0;
131         for(int i=0;i<length+start-1;i++){
132             tmp= (tmp)*10+9;
133             if(i>=start-1){
134                 arr[i-start+1] = tmp;
135            }
136         }
137         return arr;
138     }
139     
140     
141 }

补充知识点:

the size is very big,shell sort take to long time,so give it up

The size of array sorted is:9999999 The max value is permited
is:999999
java.util.Arrays.sort execute time: 1313
algorithm.study.demo2.MergeSort.mergeSort execute time: 2405
algorithm.study.demo2.QuickSort.quickSort execute time: 2048

   $max_execution_time = ini_get(‘max_execution_time’);
   echo “new timeout is $max_execution_time <br />”;
  
  
  
  echo ‘function sets supported in this install are:<br />’;
  $extensions = get_loaded_extensions();
  foreach ($extensions as $each_ext)
  {
    echo “$each_ext <br />”;
    echo ‘<ul>’;
    $ext_funcs = get_extension_funcs($each_ext);
    foreach($ext_funcs as $func)
    {
       echo “<li> $func </li>”;
    }
    echo ‘</ul>’;
  }
?>

 

 代码如下

测试排序的方法:

 1 package algorithm.study.utils;
 2 
 3 import java.util.Arrays;
 4 
 5 /**
 6  * A tool prepare for Array,it convenient to create
 7  * a random array for sort and print them 
 8  * @author ygh
 9  * 2017年2月27日
10  */
11 public class ArraysTools {
12 
13     /**
14      * Print a int[] into console
15      * @param arr The array need to print
16      */
17     public static void toStringIntArray(int[] arr){
18         System.out.println(Arrays.toString(arr));
19     }
20     
21     /**
22      * Get a random array by size and max value
23      * @param size The size the new array you want to create
24      * @param maxValue The max value in the array;
25      * @return A randow array
26      */
27     public static  int[] getRandomArray(int size,int maxValue){
28         int []arr = new int[size];
29         for(int i=0;i<size;i++){
30             arr[i]=getIntRandomValue(maxValue);
31         }
32         return arr;
33     }
34     
35     /**
36      * Get a random that less than max value
37      * @param maxValue The max value you get the random number
38      * @return A random number less than max value
39      */
40     public static int getIntRandomValue(int maxValue){
41         return (int) (Math.random()*maxValue);
42     }
43     
44 }

algorithm.study.demo2.ShellSort.shellSort execute time: 0

The size of array sorted is:999 The max value is permited is:999999
java.util.Arrays.sort execute time: 1
algorithm.study.demo2.MergeSort.mergeSort execute time: 4
algorithm.study.demo2.QuickSort.quickSort execute time: 1

algorithm.study.demo2.ShellSort.shellSort execute time: 9

The size of array sorted is:9999 The max value is permited is:999999
java.util.Arrays.sort execute time: 8
algorithm.study.demo2.MergeSort.mergeSort execute time: 3
algorithm.study.demo2.QuickSort.quickSort execute time: 2

algorithm.study.demo2.ShellSort.shellSort execute time: 0

The size of array sorted is:99 The max value is permited is:999999
java.util.Arrays.sort execute time: 0
algorithm.study.demo2.MergeSort.mergeSort execute time: 0
algorithm.study.demo2.QuickSort.quickSort execute time: 0

shellSort(希尔排序):

quickSort(快速排序):

 

 

 1 package algorithm.study.demo2;
 2 
 3 /**
 4  * This is quick sort implement
 5  * 
 6  * @author ygh 2017年2月27日
 7  */
 8 public class QuickSort {
 9 
10     /**
11      * Quick sort
12      * 
13      * @param arr The array need to sort
14      * @param start The element sorted start index
15      * @param end The element sorted end index
16      */
17     public static void quickSort(int arr[], int start, int end) {
18         if (start < end) {
19             int mid = partition(arr, start, end);
20             quickSort(arr, start, mid - 1);
21             quickSort(arr, mid + 1, end);
22         }
23     }
24 
25     /**
26      * Get mid index and make the array left element less arr[mid] and right element more arr[mid]
27      * 
28      * @param arr
29      * @param start
30      * @param end
31      * @return
32      */
33     private static int partition(int[] arr, int start, int end) {
34         int value = arr[start];
35         int i = start, j = end;
36         while (i < j) {
37             while (i < j && arr[j] >= value) {
38                 j--;
39             }
40             arr[i] = arr[j];
41             while (i < j && arr[i] <= value) {
42                 i++;
43             }
44             arr[j] = arr[i];
45 
46         }
47         arr[i] = value;
48         return i;
49     }
50 
51 }

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