[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; RY3ANEu+
} /Uth#s:
int i1=l; A[`c2v-hF
int i2=mid+1; QV,X> !Nz
for(int cur=l;cur<=r;cur++){ 'Alt+O_
if(i1==mid+1) J6r"_>)z
data[cur]=temp[i2++]; 0*^ J;QGE
else if(i2>r) GVhO}m
data[cur]=temp[i1++]; h U\)CM
else if(temp[i1] data[cur]=temp[i1++]; {>PN}fk2QP
else 6A&e2K>A
data[cur]=temp[i2++]; KJ M:-z@
} ufyqfID
} eM Ym@~4
Y /$`vgqs
} =@q 9,H
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改进后的归并排序: ?a?i8rnWo
J/X{ Y2f
package org.rut.util.algorithm.support; bL soKe
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import org.rut.util.algorithm.SortUtil; AlT41v~6
t[*;v
/** o8Vtxnkg
* @author treeroot u>SGa @R)
* @since 2006-2-2 exT O#*o
* @version 1.0 y=7WnQc
*/ })RT2zw}
public class ImprovedMergeSort implements SortUtil.Sort { 1henQiIO
>oSNKE
private static final int THRESHOLD = 10; R1OC7q
v'gP,UO-%D
/* )[_A{#&
* (non-Javadoc) 2NHuZ.af
* VtIPw&KHW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) erTb9`N4
*/ f'P}]_3(
public void sort(int[] data) { GG%X1c8K
int[] temp=new int[data.length]; {uH 4j4)2
mergeSort(data,temp,0,data.length-1); `2`Nu:r^
} m}/LMY
B w?Kb@
private void mergeSort(int[] data, int[] temp, int l, int r) { pie<jZt
int i, j, k; *qdf?'R
int mid = (l + r) / 2; hd{Vz{;W
if (l == r) ?|!167/O
return; ]AkHNgW
if ((mid - l) >= THRESHOLD) ]4~- z3=y
mergeSort(data, temp, l, mid); W _j`'WN/
else Z)}q=NjA
insertSort(data, l, mid - l + 1); #!V [(/
if ((r - mid) > THRESHOLD) =5=D)x~
mergeSort(data, temp, mid + 1, r); uis;S)+
else Pl^-]~
insertSort(data, mid + 1, r - mid); jusP aAdW
h<;kj#qbb
for (i = l; i <= mid; i++) { nn>< k"
temp = data; R-nC+)^
} uMOm<kn
for (j = 1; j <= r - mid; j++) { %SORs(4
temp[r - j + 1] = data[j + mid]; 7 +A-S9P)
} )P4#P2
int a = temp[l]; CY2DxP%
int b = temp[r]; iC- ?F cA
for (i = l, j = r, k = l; k <= r; k++) { KQ'fp:5|/@
if (a < b) { jCdKau&9
data[k] = temp[i++]; t95hI DtD
a = temp; clfi)-^{K
} else { F jdh&9Zc
data[k] = temp[j--]; $__e7
b = temp[j]; qZRx,^gd
} 04-phEA2Q
} Cr0 \7
} Y#'mALC2
+<&\*VR
/** Vlb L p;
* @param data _J^q|
* @param l 7+]T}4;
* @param i T3 xr Ua&
*/ `< 8Fc`;[
private void insertSort(int[] data, int start, int len) { BOqq=WY
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dbU
} h.0Y!'?
} XvBEC_xWZ
} "h.}o DS
} ^$3 ~;/|
;:xOW$
堆排序： Y ON@G5^
mY"DYYR>
package org.rut.util.algorithm.support; lSP{9L6
d5<@WI:wz
import org.rut.util.algorithm.SortUtil; *UVjN_na5
7O5`&Z'-
/** $4.mRS97g
* @author treeroot 4eb<SNi
* @since 2006-2-2 JtYc'%OF
* @version 1.0 dIv/.x/V
*/ 6GzmzhX4
public class HeapSort implements SortUtil.Sort{ E\!:MCL
!fdni}f)
/* (non-Javadoc) {#M=gDhbX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u:H@]z(x
*/ ]RHR>=;
public void sort(int[] data) { PHRc*G{
MaxHeap h=new MaxHeap(); X'N4a
h.init(data); <LM<,
for(int i=0;i h.remove(); iqf+rBL
System.arraycopy(h.queue,1,data,0,data.length); $hB;r
} m'1NZV%#
#|^7{TN
private static class MaxHeap{ 5r/QPJ<h
6suB!XF;
void init(int[] data){ Z5~dU{XsT
this.queue=new int[data.length+1]; gOw|s1`2,
for(int i=0;i queue[++size]=data; ~D@pk>I
fixUp(size); )CS7>Vx
} AEkgm^t.{
} &*g5kh{
S8j;oJ2d
private int size=0; u&l2s&i
fX G+88:2
private int[] queue; M%4o0k]E,s
[;dWFG"f
public int get() { UNocm0!N'
return queue[1]; @%J?[PG
} G\h8j*o
QQ@, v@j5
public void remove() { G}i\UXFE
SortUtil.swap(queue,1,size--); , 6\i
fixDown(1); >VP\@xt(R[
} #V-qS/ q"
file://fixdown 9,5v%HZ
private void fixDown(int k) { ri~dWx
int j; `9Ngax=_
while ((j = k << 1) <= size) { mm%w0dOb"
if (j < size %26amp;%26amp; queue[j] j++; G1B~?i2$ ?
if (queue[k]>queue[j]) file://不用交换 o)n8,k&nm
break; W"Dj+/uS
SortUtil.swap(queue,j,k); (]j*)~=V
k = j; Fy-nV%P
} bf3LNV|
} "n '*_rh>+
private void fixUp(int k) { /6F 1=O(c>
while (k > 1) { fT._Os?i
int j = k >> 1; If6wkY6sR
if (queue[j]>queue[k]) P>euUVMPz4
break; 3@$h/xMJ
SortUtil.swap(queue,j,k); WlP@Tm5g/
k = j; 0]8+rWp|Nz
} /@FB;`'
} H*|Bukgt/M
&.kg8|s{
} t,N-|
.5L/<
} s5|LD'o!
7x9YA$IE
SortUtil： &m8B%9w
cv:nlq)
package org.rut.util.algorithm; O~d!*A
@babgP,
import org.rut.util.algorithm.support.BubbleSort; 9 )B>|#\
import org.rut.util.algorithm.support.HeapSort; g^)>-$=
import org.rut.util.algorithm.support.ImprovedMergeSort; <!X'- >i%q
import org.rut.util.algorithm.support.ImprovedQuickSort; G+[>or}
import org.rut.util.algorithm.support.InsertSort; aC3\Hs
import org.rut.util.algorithm.support.MergeSort; avO+1<`4B
import org.rut.util.algorithm.support.QuickSort; ABhza|
import org.rut.util.algorithm.support.SelectionSort; voQ,K9
import org.rut.util.algorithm.support.ShellSort; oBqP^uT>a|
Fh v)
/** :;0?;dpO
* @author treeroot Vu`dEvL?
* @since 2006-2-2 tP!sOvQ:
* @version 1.0 XP2=x_"y
*/ 2!68W X
public class SortUtil { +6<MK;
public final static int INSERT = 1; LDV{#5J
public final static int BUBBLE = 2; \07Vh6cj
public final static int SELECTION = 3; }J`{g/
public final static int SHELL = 4; 2l5@gDk5
public final static int QUICK = 5; [%l+ C~m
public final static int IMPROVED_QUICK = 6; 58e{WC
public final static int MERGE = 7; Zy*}C,Z
public final static int IMPROVED_MERGE = 8; 3{MIBMA
public final static int HEAP = 9; w#PaN83+
WS(@KN
public static void sort(int[] data) { m OmT]X
sort(data, IMPROVED_QUICK); N0 ?O*a
} 'Iyk`=R
private static String[] name={ .v1rrH?
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" h:bs/q+-
}; WtRy~5A2
$<s@S;Ri
private static Sort[] impl=new Sort[]{ 5jNBt>.0
new InsertSort(), t1C{
new BubbleSort(), aqzvT5*8%
new SelectionSort(), iT^lk'?{O
new ShellSort(), P#ru-0DD
new QuickSort(), -m'a%aog
new ImprovedQuickSort(), ?U-p jjM
new MergeSort(), '[-H].-!
new ImprovedMergeSort(), #i2q}/w5`C
new HeapSort() :L`z~/6
}; 2~J|x+
{7/6~\'/@
public static String toString(int algorithm){ b:O4d<+%
return name[algorithm-1]; <Isr
} y Fp1@*ef
Ds}6{']K
public static void sort(int[] data, int algorithm) { Wnf`Rf)1z
impl[algorithm-1].sort(data); |=%$7b\C
} a}>GQu*y
J.?p?-"
public static interface Sort { ae!_u \$
public void sort(int[] data); }f-rWe{gs>
} H~V=TEj
!Aw.f!
public static void swap(int[] data, int i, int j) { cuKgO{.GH
int temp = data; $^ >n@Q@&L
data = data[j]; V;:A&
data[j] = temp; b/5~VY*T
} tQl=
} q0c)pxD%`