[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; ZvMU3])u
} 0[e!/*_V
int i1=l; D <R_eK
int i2=mid+1; @bJIN]R
for(int cur=l;cur<=r;cur++){ AI`k }sA~
if(i1==mid+1) Id&e'
data[cur]=temp[i2++]; *0to,$ n
else if(i2>r) ^\&FowpP
data[cur]=temp[i1++]; .6xMLo,R
else if(temp[i1] data[cur]=temp[i1++]; /;Hr{f jl{
else {/H<_
data[cur]=temp[i2++]; zRou~Kxi
} *tgu@9b
} G!;PV^6x
D}LM(s3li7
} y.c6r> }
U3Z=X TB
改进后的归并排序: 8-Y*b89
8-B7_GoJ+B
package org.rut.util.algorithm.support; YWvD+
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import org.rut.util.algorithm.SortUtil; T7^;!;i`X
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/** yCvtglAJ4
* @author treeroot cw{TS
* @since 2006-2-2 6#!CBY^{
* @version 1.0 KE@+I.x
*/ | @$I<
public class ImprovedMergeSort implements SortUtil.Sort { 9$HBKcO
6]Is"3ca
private static final int THRESHOLD = 10; ; Byt'S
{;u,04OVK
/* 4P k%+l
* (non-Javadoc) 2Y23!hw
* bo/9k 4N3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @$ Zh^+x!
*/ ]i$y;]f
public void sort(int[] data) { wlJi_)!
int[] temp=new int[data.length]; b4i=%]v8
mergeSort(data,temp,0,data.length-1); rZJJ\ , |
} G rp{ .
$R/@8qnP W
private void mergeSort(int[] data, int[] temp, int l, int r) { =g9n =spAn
int i, j, k; dAx ? ,
int mid = (l + r) / 2; U?le|tK
if (l == r) HS/.H,X
return; t{jY@JT|
if ((mid - l) >= THRESHOLD) $|-Lw!)D
mergeSort(data, temp, l, mid); "u!gfG?oH
else *VsVCUCz5*
insertSort(data, l, mid - l + 1); p%>sc
if ((r - mid) > THRESHOLD) Wvf>5g)?
mergeSort(data, temp, mid + 1, r); Fm0d0j
else X$we\t
insertSort(data, mid + 1, r - mid); S F*C'
CF{b Yf^%
for (i = l; i <= mid; i++) { $h{m")]
temp = data; cZNcplt8
} E=ijt3
for (j = 1; j <= r - mid; j++) { Hyy b0c^=
temp[r - j + 1] = data[j + mid]; !Ud'(iGa
} [g/D<g5O
int a = temp[l]; v"o"W[
int b = temp[r]; QPDh!A3T
for (i = l, j = r, k = l; k <= r; k++) { V2Vr7v=Y"
if (a < b) { ~~OFymQ%?q
data[k] = temp[i++]; &<BBPn@\
a = temp; noxJr/A]
} else { "CJ~BJI%
data[k] = temp[j--]; \N*([{X
b = temp[j]; w+R/>a(]
} kL*P 3 0
} \9VF)Y.ke
} T?pS2I~
RhE~-b[X
/** V%oZT>T3
* @param data f,cd=vGj
* @param l q*3OWr
* @param i QM0B6F
*/ '[{<aEo
private void insertSort(int[] data, int start, int len) { Jp=fLo 9
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <=*f
} bqcCA91
} eO!9;dJ
} 5daq}hsQs
} SndR:{
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堆排序： la3B`p
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package org.rut.util.algorithm.support; .G O0xnm
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import org.rut.util.algorithm.SortUtil; =fcg4h5(
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/** MET9rT
* @author treeroot ?_NKyiu95
* @since 2006-2-2 yH/A9L,Z
* @version 1.0 :o'x?]
*/ R=z])
public class HeapSort implements SortUtil.Sort{ $'J3 /C7
+=3=%%?C
/* (non-Javadoc) &W2*'$j"_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Oidf\%!mvR
*/ 4ijtx)SA
public void sort(int[] data) { ^jL '*&l
MaxHeap h=new MaxHeap(); Q\$3l'W
h.init(data); ORExI.<`W
for(int i=0;i h.remove(); 9bM\ (s/
System.arraycopy(h.queue,1,data,0,data.length); Pyo|Sgk
} IVR%H_uz
_'=,c"
private static class MaxHeap{ V(7,N(
P%3pM*.
void init(int[] data){ q(KjhM
this.queue=new int[data.length+1]; n|i:4D
for(int i=0;i queue[++size]=data; cLtVj2Wb
fixUp(size); $^]K611w9
} s2<!Zb4
} 7r:h_r-
6r)P&J
private int size=0; 7L!JP:v
"aJHCi~l
private int[] queue; kaBjA*
da$FY7
public int get() { }3(!kW
return queue[1]; d][ Wm
} $L/`nd
Y}?8
public void remove() { 4#$#x=:
SortUtil.swap(queue,1,size--); <Ky-3:pxeM
fixDown(1); *8}b&4O~
} P'W} ]mCD
file://fixdown 98[uRywI
private void fixDown(int k) { /5@YZ?|#2
int j; uFkl^2
while ((j = k << 1) <= size) { fLDrit4_Q
if (j < size %26amp;%26amp; queue[j] j++; $RD~,<oEm
if (queue[k]>queue[j]) file://不用交换 384n1?
break; *;<fh,wOk
SortUtil.swap(queue,j,k); 7({)ou x
k = j; 2b"*~O;
} E>~R P^?Uz
} U&^q#['
private void fixUp(int k) { ? x)^f+:9|
while (k > 1) { VvhfD2*T
int j = k >> 1; pKSCC"i&j
if (queue[j]>queue[k]) H/,KY/>i
break; D!j/a!MaKk
SortUtil.swap(queue,j,k); }[p{%:tP
k = j; &.A_d+K&
} {U5sRM|I
} JF=R$!5
v:O{"s
} &[E\2 E
xR+vu>f
} cO?*(e1m=
oi #B7
SortUtil： s QDgNJbU
jPh<VVQ$@
package org.rut.util.algorithm; BA;r%?MRL
*^?tr?e%I<
import org.rut.util.algorithm.support.BubbleSort; &#p1ogf:
import org.rut.util.algorithm.support.HeapSort; %cF`x_h[j
import org.rut.util.algorithm.support.ImprovedMergeSort; Y>x{ [er
import org.rut.util.algorithm.support.ImprovedQuickSort; (:oF\
import org.rut.util.algorithm.support.InsertSort; MAa9JA8kw)
import org.rut.util.algorithm.support.MergeSort; v+ $3
import org.rut.util.algorithm.support.QuickSort; +=tdgw/
import org.rut.util.algorithm.support.SelectionSort; ]7HR U6$
import org.rut.util.algorithm.support.ShellSort; sW>%mnx
66=[6U9 *
/** AL]gK)R
* @author treeroot )nm+_U
* @since 2006-2-2 >y%H2][
* @version 1.0 \u[x<-\/6
*/ :V/".K-:J
public class SortUtil { ~ 'ZwD/!e
public final static int INSERT = 1; Wt.DL mO
public final static int BUBBLE = 2; _){|/Zd
public final static int SELECTION = 3; zIa={tU
public final static int SHELL = 4; I9?\Jbqg
public final static int QUICK = 5; $QJ3~mG2
public final static int IMPROVED_QUICK = 6; J0sD?V|{1~
public final static int MERGE = 7; @c~Z0+Ji
public final static int IMPROVED_MERGE = 8; ?9 huuJs7
public final static int HEAP = 9; 4D65VgVDM
!HTOE@
public static void sort(int[] data) { }?[];FB
sort(data, IMPROVED_QUICK); U9 iI2$
} cU;Bm}U
private static String[] name={ HUKrp*Hv
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 54$^ldD
}; C[FHqo9M?H
l*ltS(?
private static Sort[] impl=new Sort[]{ yfl?\X{
new InsertSort(), 1W|jC
new BubbleSort(), I~7iIUD
new SelectionSort(), W8W7<ml0A
new ShellSort(), /-M:6
new QuickSort(), HLyAzB~r
new ImprovedQuickSort(), rm-d),Zt
new MergeSort(), rPk|2l,E,3
new ImprovedMergeSort(), ! ._q8q\
new HeapSort() rWht},-|1
}; CE"/&I
Ip8ml0oG
public static String toString(int algorithm){ 4[lFurH
return name[algorithm-1]; w:\} B'u
} >LBA0ynh {
fe\lSGmf
public static void sort(int[] data, int algorithm) { dIC\U
impl[algorithm-1].sort(data); :qm\FsO
} %lCZ7z2o
5]O{tSj
public static interface Sort { u`|%qRt
public void sort(int[] data); "#C2+SKM1
} ZTR9e\F
/
public static void swap(int[] data, int i, int j) { }UyQGRZ=
int temp = data; '/O:@P5qY
data = data[j]; TFXBN.?9T
data[j] = temp; 7(@xk_Pl
} dN2JOyS
} tpWGmjfo>