[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; 9yp'-RKjw
} B#4'3Y-3
int i1=l; Y+Cv9U0
int i2=mid+1; nnCz!:9p
for(int cur=l;cur<=r;cur++){ '^(qlCI
if(i1==mid+1) +|qw>1J(
data[cur]=temp[i2++]; PV-B<Y
else if(i2>r) 6S^JmYq
data[cur]=temp[i1++]; :XB^IyO-A
else if(temp[i1] data[cur]=temp[i1++]; }$#PIyz
else m2[J5n?zLL
data[cur]=temp[i2++]; JvYs6u
} gnlU
} ;&XC*R+
i<*W,D6
} meZZQ:eSl
c9Q_Qr0'
改进后的归并排序: .gY=<bG/fA
2:&L|;
package org.rut.util.algorithm.support; V!QC.D<
d'[q2y?6N
import org.rut.util.algorithm.SortUtil; =d/$B!t{
P?Kg7m W
/** XO}SPf-
* @author treeroot 9JO1O:W
* @since 2006-2-2 TPmb]j
* @version 1.0 4ULdf|oP"
*/ ~R~eQ=8
public class ImprovedMergeSort implements SortUtil.Sort { ]3uj~la
C)ic;!$Qhb
private static final int THRESHOLD = 10; !*o{xq
{}P~nP
/* Jt3*(+J>/
* (non-Javadoc) 8d(l)[GZt
* Dlz1"|SF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vJe c+a
*/ gUme({h&|
public void sort(int[] data) { Px&)kEQ
int[] temp=new int[data.length]; ^(KDtc
mergeSort(data,temp,0,data.length-1); t?Q
} &U\//
<4TF ]5
private void mergeSort(int[] data, int[] temp, int l, int r) { pW_mS|
int i, j, k; PsBLAr\ah
int mid = (l + r) / 2; x[mh^V5ld
if (l == r) -m$2"_
return; 3e1%G#fu
if ((mid - l) >= THRESHOLD) [^gb6W9Y
mergeSort(data, temp, l, mid); o90[,
else p,14'HS%@
insertSort(data, l, mid - l + 1); I7W?}bR*6
if ((r - mid) > THRESHOLD) m,&2s-v
mergeSort(data, temp, mid + 1, r); *S'?u_Y7
else h$p}/A
insertSort(data, mid + 1, r - mid); oz7=1;r
Qjmo{'d
for (i = l; i <= mid; i++) { zpg512\y
temp = data; tg7QX/KX
} _o==
for (j = 1; j <= r - mid; j++) { TWdhl9Ot
temp[r - j + 1] = data[j + mid]; A@e!~
} u/%Z0`X
int a = temp[l]; a\KM^jrCD
int b = temp[r]; "g5MltH
for (i = l, j = r, k = l; k <= r; k++) { NT{'BJ
if (a < b) { izLB4pk$
data[k] = temp[i++]; #)4p,H
a = temp; S~M/!Xb
} else { ps*iE=D
data[k] = temp[j--]; 'N`x@(
b = temp[j]; BwVq:)P/R
} vd/BO
} @XVx{t;g2
} czK}F/Sg`
7A{Z1[7
/** f;!L\$yKy
* @param data V-18~+F~"a
* @param l n!U1cB{
* @param i 6n H'NNS:J
*/ w I[Hoi V
private void insertSort(int[] data, int start, int len) { Nhtc^DX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); WLH ;{
} &:~9'-O
} /*Gbl
} z6fY_LL
} yF-`f _
3dgPP@7d$
堆排序： KON^
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package org.rut.util.algorithm.support; 1";s#Jq
<kazV<"
import org.rut.util.algorithm.SortUtil; xPJ@!ks9
10_>EY`
/** OX[r\
* @author treeroot Ct$\!|aR
* @since 2006-2-2 D8`SI21P
* @version 1.0 Nj +^;Y
*/ DIgur}q)@
public class HeapSort implements SortUtil.Sort{ A(z m
QiaBZAol
/* (non-Javadoc) ktM7L{Nz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tUGF8?& G
*/ ()Qq7/
public void sort(int[] data) { M$} AJS%8
MaxHeap h=new MaxHeap(); mqDI'~T9 u
h.init(data); Yw\lNhoPS
for(int i=0;i h.remove(); /1eeNbd
System.arraycopy(h.queue,1,data,0,data.length); 6 kD.
} NleMZ
9 $^b^It
private static class MaxHeap{ eL [.;_
$)6x3&]P
void init(int[] data){ 7_J0[C!G
this.queue=new int[data.length+1]; }/jWa|)f
for(int i=0;i queue[++size]=data; )GOio+{H
fixUp(size); QFFFxaeJg
} ^ZFK:|Ju
} f,Am;:\|
s<5PsR
private int size=0; ViU5l*n;
p9&gKIO_m
private int[] queue; [@@EE> y
<Vh}d/
public int get() { ?>My&yB
return queue[1]; +mYK
} T-x}o
Kp19dp}'b
public void remove() { #P {|7}jk
SortUtil.swap(queue,1,size--); FJFO0Hb6
fixDown(1); bd2QQ1[1vh
} !Oi':OQG
file://fixdown 2rHQ7
private void fixDown(int k) { <KX+j,4
int j; Nl^uA
while ((j = k << 1) <= size) { o* e'D7
if (j < size %26amp;%26amp; queue[j] j++; DH)E9HL
if (queue[k]>queue[j]) file://不用交换 D#[<N
break; lkJe7 +s
SortUtil.swap(queue,j,k); 5=1Ml50
k = j; V?~!Dp
} cGlpJ)'-{
} 8YQ7XB
private void fixUp(int k) { `chD*@76I
while (k > 1) { Z_mQpt|y
int j = k >> 1; 2"WP>>b80
if (queue[j]>queue[k]) ER;\Aes*?
break; @Thrizh
SortUtil.swap(queue,j,k); i/PL!'oq
k = j; r(rT.D&
} BE!l{
} SeLFubs_
*a-KQw
} %q6I-
v`U;.W
} -1w^z`;2h
0qW"b`9R
SortUtil： ,o}CBB! k
AuY*x;~
package org.rut.util.algorithm; U[z2{\
f<y3/jl4
import org.rut.util.algorithm.support.BubbleSort; a3,A_M}M'
import org.rut.util.algorithm.support.HeapSort; Hk$do`H-=Y
import org.rut.util.algorithm.support.ImprovedMergeSort; j.c{%UYj
import org.rut.util.algorithm.support.ImprovedQuickSort; x+v&3YF
import org.rut.util.algorithm.support.InsertSort; [kMWsiZ
import org.rut.util.algorithm.support.MergeSort; 3E}j*lo
import org.rut.util.algorithm.support.QuickSort; 1v*N]}`HU
import org.rut.util.algorithm.support.SelectionSort; |o@U L
import org.rut.util.algorithm.support.ShellSort; #k,.xMJ~
0n\AUgVPF
/** z'\BZ5riX<
* @author treeroot l nJ
* @since 2006-2-2 ]l`V#Rd
* @version 1.0 mZ.gS1Dq
*/ =h.` ey
public class SortUtil { iDdR-T|
public final static int INSERT = 1; En4!-pWHQ
public final static int BUBBLE = 2; O\h%ZLjfO
public final static int SELECTION = 3; #"C!-kS'=
public final static int SHELL = 4; M|R\[ Zf
public final static int QUICK = 5; /v.<h*hxWy
public final static int IMPROVED_QUICK = 6; GGUwS
public final static int MERGE = 7; +jO#?J
public final static int IMPROVED_MERGE = 8; bGK-?BE5+A
public final static int HEAP = 9; WkV0,_(P
ft~QVe!
public static void sort(int[] data) { 'r1X6?dJ
sort(data, IMPROVED_QUICK); :_Iz( 2hV
} u/xP$
private static String[] name={ iO$ ?No
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [7 t
}; C8=rsh
/l8wb~vl
private static Sort[] impl=new Sort[]{ l~[ K.p&
new InsertSort(), 9t8ccr
new BubbleSort(), A,c_ME+DVB
new SelectionSort(), O`Htdnu
new ShellSort(), ~*`wRiUhis
new QuickSort(), O{Q+<fBC9
new ImprovedQuickSort(), VBW][f
new MergeSort(), -b34Wz(
new ImprovedMergeSort(), !j3Xzn9
new HeapSort() R_2#7Xs
}; {c7@`AV]
y,`q6(&
public static String toString(int algorithm){ O9RnS\
return name[algorithm-1]; #%{
} %}unlSTPP
}H/94]~tH
public static void sort(int[] data, int algorithm) { ~+PKWs'}F
impl[algorithm-1].sort(data); lB7/oa1]>
} iz+,,UH
}4Q3S1|U
public static interface Sort { v!=e]w6{
public void sort(int[] data); Z1p%6f`
} w9Nk8OsL
D0Ls~qr
public static void swap(int[] data, int i, int j) { Ga` 8oY+~
int temp = data; bPMf='F{r
data = data[j]; gx2v(1?S
data[j] = temp; D'Uc?2X,&
} SCjVzvG$yg
} JB!*{{