[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; eD,.~Y#?=
} _zY#U9
int i1=l; FHj" nB
int i2=mid+1; ]<ldWL
for(int cur=l;cur<=r;cur++){ }AB,8n`
if(i1==mid+1) ~IYUuWF(
data[cur]=temp[i2++]; +"rDT1^V
else if(i2>r) \UPjf]&
data[cur]=temp[i1++]; _Gn2o2T
else if(temp[i1] data[cur]=temp[i1++]; ~xkeuU
else )eUh=eW
data[cur]=temp[i2++]; S0zD"T
} ]~9tYn
} ZGexdc%
(?n=33}Ci
} Q_"]+i]s@
ck:T,F{}
改进后的归并排序: 3O,+=?VK
my(2;IJ#{
package org.rut.util.algorithm.support; Ro\8ZXUQa
0(eBZdRO
import org.rut.util.algorithm.SortUtil; )(bW#-
LInz<bc<(
/** YWe{juXSw
* @author treeroot mk;&yh
* @since 2006-2-2 4w*Skl=F}
* @version 1.0 %RTBV9LIXr
*/ <^&ehy:7y
public class ImprovedMergeSort implements SortUtil.Sort { z06r6
,)0H3t
private static final int THRESHOLD = 10; Bo)3!wO8
ni.cTOSx
/* nCUg,;_=
* (non-Javadoc) h}[-'>{
* e%svrJ2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) eWCb73
*/ =$u! 59_dE
public void sort(int[] data) { <CS(c|7
int[] temp=new int[data.length]; j_K4;k#r
mergeSort(data,temp,0,data.length-1); @Xt*Snd
} T. }1/S"m
|?!~{-o
private void mergeSort(int[] data, int[] temp, int l, int r) { "Lzi+1
int i, j, k; Vx$\hcG
int mid = (l + r) / 2; 9Vg?{v!yn
if (l == r) ;y,5k?
return; 3k\#CiB{
if ((mid - l) >= THRESHOLD) caIL&G,
mergeSort(data, temp, l, mid); bp* ^z,w
else \d6C%S!
insertSort(data, l, mid - l + 1); +[M6X} TQ
if ((r - mid) > THRESHOLD) [A~y%bI"
mergeSort(data, temp, mid + 1, r); Z?6%;n^ 54
else Dt}JG6S
insertSort(data, mid + 1, r - mid); B-xGX$<z
p, h9D_
for (i = l; i <= mid; i++) { E%yNa]\P
temp = data; %aHB"vi6
} 2y//'3[
for (j = 1; j <= r - mid; j++) { SON-Z"v
temp[r - j + 1] = data[j + mid]; +NeOSQSj
} (uXL^oja
int a = temp[l]; VU#`oJ:{
int b = temp[r]; 3-[q4R
for (i = l, j = r, k = l; k <= r; k++) { 7r7YNn/?
if (a < b) { 'H3^e}
data[k] = temp[i++]; @ju@WY45$^
a = temp; ;ic3).H
} else { |LRedD7n
data[k] = temp[j--]; { d=^}-^
b = temp[j]; iJ-23_D
} #H)vK"hF
} tClg*A;|B
} QiQ_bB!\
B\=L3eL<D
/** UxbjA- U[
* @param data Ok|*!!T
* @param l 8hu<E4]L
* @param i Dl<bnx;0
*/ @D.}\(
private void insertSort(int[] data, int start, int len) { lAS#874dE
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2POXj!N
} 44gPCW,u
} cA2V2S)
} - \5v^l
} s6H]J{1F
RM]\+BK
堆排序： fFMlDg[];
2L:_rR#w
package org.rut.util.algorithm.support; `[z<4"Os
KT_!d*
import org.rut.util.algorithm.SortUtil; SOs:]U-T3
SbND Y{5RO
/** !F*5M1Kjd
* @author treeroot 7TgOK
* @since 2006-2-2 \MsTB|Z
* @version 1.0 Umz KY
*/ <5-[{Q/2z
public class HeapSort implements SortUtil.Sort{ %<)2/|lCd
<C_jF
/* (non-Javadoc) 68NYIyTW9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |EIng0a
*/ 9/{(%XwX
public void sort(int[] data) { ~,d,#)VE2q
MaxHeap h=new MaxHeap(); "LHcB]^<
h.init(data); s28`OKC}
for(int i=0;i h.remove(); !Xh=k36
System.arraycopy(h.queue,1,data,0,data.length); g$":D
} #9B)Xx!g
J; 3{3
private static class MaxHeap{ qt"G[9;
k|v3.< -
void init(int[] data){ j?A/#
this.queue=new int[data.length+1]; ^T( .k=
for(int i=0;i queue[++size]=data; T%x}Y#U'`
fixUp(size); |Z|-q"Rf
} |+"<wEKI
} niiA7Ux
ySk R>y
private int size=0; -0d0t!
QMA%$
private int[] queue; %"kPvI3Y
bH-ub2@qO
public int get() { P#E&|n7DT
return queue[1]; Yab%/z2:
} _A M*@|p,
l3KVW5-!gS
public void remove() { !xzeMVI
SortUtil.swap(queue,1,size--); O6Vtu Ws%
fixDown(1); $CxKuB(
} Yw22z #K
file://fixdown Kh"?%ZIa
private void fixDown(int k) { N@;?CKU
int j; -<c=US
while ((j = k << 1) <= size) { jTf@l?|
if (j < size %26amp;%26amp; queue[j] j++; F;>V>" edl
if (queue[k]>queue[j]) file://不用交换 Av @b!iw+
break; &qLf@1AD
SortUtil.swap(queue,j,k); 3T31kQv{
k = j; NO2XA\
} w4_ U0 n3
} x[4`fM.m*
private void fixUp(int k) { AG3>V+k{Lv
while (k > 1) { 9TU88]
int j = k >> 1; 1;d$#j
if (queue[j]>queue[k]) 8a&:6Zuo
break; Zvhsyz|
SortUtil.swap(queue,j,k); fs|)l$Rd
k = j; UN7EF/!Zz
} zUDg&-J3
} V@\gS"Tu
'QG xd!4
} \Lq h j
Y}@&h!
} g(nPQOs$u
ZkgV_<M|
SortUtil： G=)i{oC
+QB"8-
package org.rut.util.algorithm; IWBX'|}K
> pgX^
import org.rut.util.algorithm.support.BubbleSort; jy7\+i
import org.rut.util.algorithm.support.HeapSort; MtM%{=&_
import org.rut.util.algorithm.support.ImprovedMergeSort; y9_V
import org.rut.util.algorithm.support.ImprovedQuickSort; O7u(}$D L
import org.rut.util.algorithm.support.InsertSort; ]~844Jp
import org.rut.util.algorithm.support.MergeSort; ioaU*%
import org.rut.util.algorithm.support.QuickSort; OHv[#xGuV?
import org.rut.util.algorithm.support.SelectionSort; BK*x] zG$
import org.rut.util.algorithm.support.ShellSort; vrl;"Fm+
SD#]$v
/** M])ZK
* @author treeroot )W|w C#
* @since 2006-2-2 -T!f,g3vW
* @version 1.0 ~"dA~[r L
*/ ::o lN
public class SortUtil { _t:$XJ`bTk
public final static int INSERT = 1; 6L:x^bM
public final static int BUBBLE = 2; J`^ag'
public final static int SELECTION = 3; 2C2fGYu
public final static int SHELL = 4; jnd[6v=C7-
public final static int QUICK = 5; <DpevoF
public final static int IMPROVED_QUICK = 6; >PB4L_1
public final static int MERGE = 7; <CRP^_c
public final static int IMPROVED_MERGE = 8; QU#w%|
public final static int HEAP = 9; d^/3('H6
-HQQw$
public static void sort(int[] data) { z,|r*\dw
sort(data, IMPROVED_QUICK); TPVVck-T8
} B! rTD5a
private static String[] name={ VzBqjE_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ,l%CX.9
}; c_\YBe]wJ
;V@WtZv
private static Sort[] impl=new Sort[]{ %lL.[8r|
new InsertSort(), ]d55m/(
new BubbleSort(), Ok{*fa.PK
new SelectionSort(), $J4 *U
new ShellSort(), IOTR/anu
new QuickSort(), I6~pV@h^=
new ImprovedQuickSort(), ~0?mBy!-O
new MergeSort(), Xsa2(-
new ImprovedMergeSort(), aF8fqu\
new HeapSort() jNu9KlN
}; Yj%U >),8
z MLK7+
public static String toString(int algorithm){ [N1hWcfvd
return name[algorithm-1]; )_a~} U]=.
} b`L%t:u{d
Cv }Qwy
public static void sort(int[] data, int algorithm) { "~`I::'c
impl[algorithm-1].sort(data); Z.d7U~_
} FE" y\2}
- *F(7$
public static interface Sort { Kqun^"Df
public void sort(int[] data); R=.4
} ?MXejEC
.id)VF-l
public static void swap(int[] data, int i, int j) { NxSu3e~PS
int temp = data; +U_=*"@|
data = data[j]; *+'x~a
data[j] = temp; Ny_lrfh)[
} F1iGMf-8
} 8iW;y2qF