[JAVA]用Java实现的各种排序

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0 发表于: 2007-03-15

用Java语言实现的各种排序，包括插入排序、冒泡排序、选择排序、Shell排序、快速排序、归并排序、堆排序、SortUtil等。
插入排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;
/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class InsertSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

冒泡排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class BubbleSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for(int i=0;i for(int j=data.length-1;j>i;j--){
if(data[j] SortUtil.swap(data,j,j-1);
}
}
}
}

}

选择排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class SelectionSort implements SortUtil.Sort {

/*
* (non-Javadoc)
*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int temp;
for (int i = 0; i < data.length; i++) {
int lowIndex = i;
for (int j = data.length - 1; j > i; j--) {
if (data[j] < data[lowIndex]) {
lowIndex = j;
}
}
SortUtil.swap(data,i,lowIndex);
}
}

}

Shell排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ShellSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
for(int i=data.length/2;i>2;i/=2){
for(int j=0;j insertSort(data,j,i);
}
}
insertSort(data,0,1);
}

/**
* @param data
* @param j
* @param i
*/
private void insertSort(int[] data, int start, int inc) {
int temp;
for(int i=start+inc;i for(int j=i;(j>=inc)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-inc);
}
}
}

}

快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class QuickSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
quickSort(data,0,data.length-1);
}
private void quickSort(int[] data,int i,int j){
int pivotIndex=(i+j)/2;
file://swap
SortUtil.swap(data,pivotIndex,j);

int k=partition(data,i-1,j,data[j]);
SortUtil.swap(data,k,j);
if((k-i)>1) quickSort(data,i,k-1);
if((j-k)>1) quickSort(data,k+1,j);

}
/**
* @param data
* @param i
* @param j
* @return
*/
private int partition(int[] data, int l, int r,int pivot) {
do{
while(data[++l] while((r!=0)%26amp;%26amp;data[--r]>pivot);
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
return l;
}

}

改进后的快速排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class ImprovedQuickSort implements SortUtil.Sort {

private static int MAX_STACK_SIZE=4096;
private static int THRESHOLD=10;
/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] stack=new int[MAX_STACK_SIZE];

int top=-1;
int pivot;
int pivotIndex,l,r;

stack[++top]=0;
stack[++top]=data.length-1;

while(top>0){
int j=stack[top--];
int i=stack[top--];

pivotIndex=(i+j)/2;
pivot=data[pivotIndex];

SortUtil.swap(data,pivotIndex,j);

file://partition
l=i-1;
r=j;
do{
while(data[++l] while((r!=0)%26amp;%26amp;(data[--r]>pivot));
SortUtil.swap(data,l,r);
}
while(l SortUtil.swap(data,l,r);
SortUtil.swap(data,l,j);

if((l-i)>THRESHOLD){
stack[++top]=i;
stack[++top]=l-1;
}
if((j-l)>THRESHOLD){
stack[++top]=l+1;
stack[++top]=j;
}

}
file://new InsertSort().sort(data);
insertSort(data);
}
/**
* @param data
*/
private void insertSort(int[] data) {
int temp;
for(int i=1;i for(int j=i;(j>0)%26amp;%26amp;(data[j] SortUtil.swap(data,j,j-1);
}
}
}

}

归并排序：

package org.rut.util.algorithm.support;

import org.rut.util.algorithm.SortUtil;

/**
* @author treeroot
* @since 2006-2-2
* @version 1.0
*/
public class MergeSort implements SortUtil.Sort{

/* (non-Javadoc)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[])
*/
public void sort(int[] data) {
int[] temp=new int[data.length];
mergeSort(data,temp,0,data.length-1);
}

private void mergeSort(int[] data,int[] temp,int l,int r){
int mid=(l+r)/2;
if(l==r) return ;
mergeSort(data,temp,l,mid);
mergeSort(data,temp,mid+1,r);
for(int i=l;i<=r;i++){
temp=data; xQDQgvwa
} HnKgD:
int i1=l; _fu <`|kc
int i2=mid+1; bKGX> %-
for(int cur=l;cur<=r;cur++){ H!Q72tyo
if(i1==mid+1) ZK'46lh
data[cur]=temp[i2++]; CX{6
else if(i2>r) 9$z$yGjl
data[cur]=temp[i1++]; Vc;[0iB
else if(temp[i1] data[cur]=temp[i1++]; Tn1V+)
else }.E^_`
data[cur]=temp[i2++]; ,0,FzxX0!
} dH;2OWM
} AQ@)'
rvy%8%e?
} ^7gKs2M
cPuXye
改进后的归并排序: vVw@^7U
sAqy(oy#M
package org.rut.util.algorithm.support; T9w=k)
8$A0q%n
import org.rut.util.algorithm.SortUtil; ls:oC},p*
^M6lF5
/** e9RYk:O
* @author treeroot [V:~j1{3
* @since 2006-2-2 QwWd"Of
* @version 1.0 p? o[+L<
*/ +sjzT[ Dn
public class ImprovedMergeSort implements SortUtil.Sort { l;@+=uVDHm
6{]F#ig=
private static final int THRESHOLD = 10; 0>7Ij7\[8
;J,(YNI 1
/* [UZr|F
* (non-Javadoc) rf%lhBv
* Rh|9F yN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "%Y=+
*/ c_*w<vJ-'
public void sort(int[] data) { -'d:~:1f
int[] temp=new int[data.length]; yiC7)=
mergeSort(data,temp,0,data.length-1); s. A}ydtt
} EUuSN| a
,7Hyrx`
private void mergeSort(int[] data, int[] temp, int l, int r) { <n]PD;.4
int i, j, k; v;o1c44;
int mid = (l + r) / 2; k Alxm{
if (l == r) }rfikm
return; "Mj#P9
if ((mid - l) >= THRESHOLD) Ge-Bk)6
mergeSort(data, temp, l, mid); !Z:XSF[T
else ^wd@mWxx
insertSort(data, l, mid - l + 1); v f{{z%3T
if ((r - mid) > THRESHOLD) ?PMbbqa0
mergeSort(data, temp, mid + 1, r); +`k30-<P
else 3PU_STSix
insertSort(data, mid + 1, r - mid); /"?DOsJ.
W<prY
for (i = l; i <= mid; i++) { mW%8`$rVEO
temp = data; F6[F~^9D
} uW!XzX['
for (j = 1; j <= r - mid; j++) { MmjZq
temp[r - j + 1] = data[j + mid]; lxL.ztL
} ^%9oeT{
int a = temp[l]; vnvpb! @Q
int b = temp[r]; z eT`kZ
for (i = l, j = r, k = l; k <= r; k++) { fF0i^E<
if (a < b) { T3zovnR
data[k] = temp[i++]; N,Ma\D+^t
a = temp; ErK1j
} else { -t|/g5.w_
data[k] = temp[j--]; 0d_)C>gcF
b = temp[j]; l5Bm.H_
} PO"lY'W.U
} 'l.tV7
} )dhR&@r*w
w!20
/** 49QsT5b)
* @param data 5;0w({1l
* @param l B-C$>H^
* @param i `-pwP
*/ baII!ks
private void insertSort(int[] data, int start, int len) { hYkkr&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }b(hD|e
} Th9V8Rg+E
} W`Gbo uxd
} ?^%[*OCCC!
} "frZ%mv
<@.e.H
堆排序： gA(npsUHI
[_)`G*X(N
package org.rut.util.algorithm.support; 6AAvsu:
;b0Q%TDh
import org.rut.util.algorithm.SortUtil; 3s!6rT_=)d
^~[7])}g6
/** vzg^tJ
* @author treeroot Hloe7+5UD
* @since 2006-2-2 ^}-l["u`
* @version 1.0 cRnDAn#42
*/ KNAvLcg
public class HeapSort implements SortUtil.Sort{ dRron_'
Jj \nye+
/* (non-Javadoc) hUlRtt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CXrOb+
*/ c6xr[tc%
public void sort(int[] data) { cpa" ,8
MaxHeap h=new MaxHeap(); 3k)xzv%r`
h.init(data); A?lLK&*
for(int i=0;i h.remove(); dP8qP_77A~
System.arraycopy(h.queue,1,data,0,data.length); kT@ITA22
} dA hcA.
$k\bP9
private static class MaxHeap{ ..8t1+S6]
#AGO~#aK
void init(int[] data){ S!8<|WO^t
this.queue=new int[data.length+1]; uBbQJvL
for(int i=0;i queue[++size]=data; .Od:#(aq
fixUp(size); :b44LXKCP
} ]%6%rq%9C
} k={D!4kKz
5qnei\~
private int size=0; }gv'r ";
9!n:hhJM
private int[] queue; l7VO8p]y[R
Z?o0Q\}1
public int get() { aze#Cn,P}
return queue[1]; 4@0aN6Os
} #7O7O~
%"H:z
public void remove() { FFw(`[A_
SortUtil.swap(queue,1,size--); +yO) 3
fixDown(1); Wa^Wn +r
} G!I++M"
file://fixdown ?_gvI
private void fixDown(int k) { nnPT08$
int j; b/UXO$_~-
while ((j = k << 1) <= size) { 6-wpR
if (j < size %26amp;%26amp; queue[j] j++; "^$Ht`p[
if (queue[k]>queue[j]) file://不用交换 yf:0u_&]
break; u<:uL
SortUtil.swap(queue,j,k); \7LL neq
k = j; jv~#'=T'
} F`:Q
} bra2xHK@
private void fixUp(int k) { Sn-#Y(>]o0
while (k > 1) { )jL@GW
int j = k >> 1; 0OHXg=
if (queue[j]>queue[k]) jo"nK,r
break; $=plAi
SortUtil.swap(queue,j,k); 5>9Q<*
k = j; SdlO]y9E
} O<s7VHj
} .\a+m
]x metv|7
} Ms6;iW9
pA.orx
} DIGw4g4Kt
6Mc&=}bV
SortUtil： k5\V:P=#
fh =R
package org.rut.util.algorithm; .$-;`&0cZ
7RUztu\_
import org.rut.util.algorithm.support.BubbleSort; YeOn
import org.rut.util.algorithm.support.HeapSort; J8~hIy6]
import org.rut.util.algorithm.support.ImprovedMergeSort; hD5@PeLh
import org.rut.util.algorithm.support.ImprovedQuickSort; Jzf+"%lv
import org.rut.util.algorithm.support.InsertSort; PJB_"?NTTC
import org.rut.util.algorithm.support.MergeSort; 1^$hbRq
import org.rut.util.algorithm.support.QuickSort; LE}`rW3
import org.rut.util.algorithm.support.SelectionSort; ??nT[bhQ
import org.rut.util.algorithm.support.ShellSort; _]*[TGap
Mt4]\pMUb
/** HCOsVTl,
* @author treeroot =~O3j:<6
* @since 2006-2-2 n/;{-
* @version 1.0 7{U[cG+a#
*/ 4}N+o+
public class SortUtil { 15{^waR6
public final static int INSERT = 1; 3|$?T|#B
public final static int BUBBLE = 2; Kc]cJ`P4.
public final static int SELECTION = 3; mdL T7
public final static int SHELL = 4; ? /!Fv/
public final static int QUICK = 5; dwB#k$VIOw
public final static int IMPROVED_QUICK = 6; "#wAGlH6>
public final static int MERGE = 7; c= 2E/x?
public final static int IMPROVED_MERGE = 8; {@KLN<
public final static int HEAP = 9; waC i9
`{YOl\d_
public static void sort(int[] data) { ]Qe~|9I
sort(data, IMPROVED_QUICK); ,'c%S|]U7
} FiQ&g*=|
private static String[] name={ <tTNtBb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ?:vg`m!*
}; wOL%otEf
53uptQ{
private static Sort[] impl=new Sort[]{ T|\sN*}\8J
new InsertSort(), |u`YT;`!"-
new BubbleSort(), MDa[bQNM
new SelectionSort(), ZOqA8#\
new ShellSort(), *><j(uz!
new QuickSort(), 0*:n<T9
new ImprovedQuickSort(), h(q4 B~
new MergeSort(), lg-`zV3
new ImprovedMergeSort(), (1S9+H>g
new HeapSort() =4q5KI
}; ;t7F%cDA
WuVsW3@
public static String toString(int algorithm){ iU.` TqR7
return name[algorithm-1]; EM<W+YU
} u^C\aujg
K'8o'S_bF
public static void sort(int[] data, int algorithm) { R5MN;xG^
impl[algorithm-1].sort(data); Usht\<{
} hK4ww"-
=:T"naY(
public static interface Sort { P `<TO
public void sort(int[] data); u@Gum|_=N
} J8FzQ2
,%m~OB#
public static void swap(int[] data, int i, int j) { XH0{|#hwN
int temp = data; miBCq l@x
data = data[j]; G8F;fG N
data[j] = temp; e{2Za
} 0F!Uai1
} eiOAbO#U