[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; he3SR@\T
} L?&'xzt B
int i1=l; RH;:9_*F
int i2=mid+1; p^m5`{1]x
for(int cur=l;cur<=r;cur++){ 7Ob*Yv=[
if(i1==mid+1) eHg3}b2r
data[cur]=temp[i2++]; %Tn#-
else if(i2>r) ;+"f
data[cur]=temp[i1++]; JMBK{JK>
else if(temp[i1] data[cur]=temp[i1++]; mZk0@C&:6
else JHn*->m
data[cur]=temp[i2++]; )4Q?aMm
} 5__+_hO ;3
} |Yi)"-
Fr?z"
} J<j&;:IRd
4_M>OD/"
改进后的归并排序: ?0*8RK
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package org.rut.util.algorithm.support; i?;r7>
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import org.rut.util.algorithm.SortUtil; 6&v?)o
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/** V% TH7@y
* @author treeroot ~o3Hdd_#}N
* @since 2006-2-2 m,LG=s
* @version 1.0 1-SVCk -
*/ ihL/n
public class ImprovedMergeSort implements SortUtil.Sort { `A%^UCd
$*[{J+t_
private static final int THRESHOLD = 10; {WN(&eax
ZBD;a;wx
/* Tz&Y]#h_
* (non-Javadoc) : DG)g3#
* &UHPX?x
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) W><Zn=G4)b
*/ HYr}wG
public void sort(int[] data) { k4J8O3E
int[] temp=new int[data.length]; DbX{#4lx
mergeSort(data,temp,0,data.length-1); gv15t'y9
} Lju7,/UD
%bXx!x8(
private void mergeSort(int[] data, int[] temp, int l, int r) { <c[U#KrvJ
int i, j, k; Q }k.JS~#
int mid = (l + r) / 2; 4\t1mocCSN
if (l == r) KP;(Q+qTx
return; ".*x!l0y7
if ((mid - l) >= THRESHOLD) +H/jK@
mergeSort(data, temp, l, mid); gB,G.QM*6
else 2Tav;LKX
insertSort(data, l, mid - l + 1); Myat{OF
if ((r - mid) > THRESHOLD) 89}Y5#W
mergeSort(data, temp, mid + 1, r); XK(`mEi
else 0Y=![tO8
insertSort(data, mid + 1, r - mid); wbyE;W
?C0l~:j7D
for (i = l; i <= mid; i++) { p4>$z& _
temp = data; EUYCcL'G
} oz'\q0
for (j = 1; j <= r - mid; j++) { ivgpS5 M`Y
temp[r - j + 1] = data[j + mid]; o;"OSp
} hlZ@Dq%f
int a = temp[l]; }G46g#_6d>
int b = temp[r]; W)j|rz.
for (i = l, j = r, k = l; k <= r; k++) { Wm'QP4`
if (a < b) { zboF 1v`
data[k] = temp[i++]; m%+IPZ2m
a = temp; 8qi+IGRg
} else { ;32#t[ib
data[k] = temp[j--]; C) QKPT
b = temp[j]; y]..=z_ql
} fyz nuUl
} "bg'@:4F
} NY$uq+Z>
I[MgIr^
/** M/PFPJ >`
* @param data h.rD}N\L
* @param l ?8dVH2W.
* @param i rRES8/
*/ $m1<i?'m
private void insertSort(int[] data, int start, int len) { xieP "6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); - N>MBn
} 5 v^yQ<70
} z><5R|Gf
} :vx$vZb
} "Y`3DxXz
n;HHogA
堆排序： %x;x_
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package org.rut.util.algorithm.support; _eSdnHWx
r90+,aLM#?
import org.rut.util.algorithm.SortUtil; o 6{\Zzp
9DQ)cy
/** W^,S6!
* @author treeroot %1 KbS [
* @since 2006-2-2 {>3\N0e5
* @version 1.0 ]e:/"
*/ rsn.4P=
public class HeapSort implements SortUtil.Sort{ 8rZ!ia!
psh^MX)Q
/* (non-Javadoc) _3iHkQr
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) xVB;s.'!
*/ D(W,yq~7uY
public void sort(int[] data) { pY)5bSA
MaxHeap h=new MaxHeap(); QB!~Wh
h.init(data); 1[F3 Z
for(int i=0;i h.remove(); h-a!q7]l
System.arraycopy(h.queue,1,data,0,data.length); -Ue$T{;RoH
} ~na!@<zB{
N(6|yZ<J3M
private static class MaxHeap{ Th[f9H%
V~DMtB7
void init(int[] data){ SEwku}
this.queue=new int[data.length+1]; Kyt)2p
for(int i=0;i queue[++size]=data; F+ <Z<q
fixUp(size); l}^3fQXI
} .9*wY0:
} ;rI@*An
;DA8B'^>
private int size=0; WFR?fDtE
<P ,~eX(r
private int[] queue; S0h'50WteJ
c@[:V
public int get() { 75nNh~?)\
return queue[1]; %R#L
} I3 =#@2
onCKI,"
public void remove() { ~I/@i
SortUtil.swap(queue,1,size--); v$~QCtc
fixDown(1); 6%`&+Lq
} .LVQx
file://fixdown !IU.a90V
private void fixDown(int k) { <H3ezv1M
int j; I4;A8I
while ((j = k << 1) <= size) { H>Q%"|
if (j < size %26amp;%26amp; queue[j] j++; c0c|z Ym
if (queue[k]>queue[j]) file://不用交换 D.D$#O_n.S
break; g 6]epp[8
SortUtil.swap(queue,j,k); 65z"
k = j; U<"WK"SM
} OJT1d-5p
} U~{du;\
private void fixUp(int k) { 6-`|:[Q~
while (k > 1) { V$0dtvGvH
int j = k >> 1; 1}hIW":3Sr
if (queue[j]>queue[k]) rG?>ltxB
break; ZZQG?("S'
SortUtil.swap(queue,j,k); ]&Z))H
k = j; 64Lx-avf
} z"D.Bm~]
} 7\_o.(g#-
$'W}aER
} w6`9fX6{h
"G>3QL+O|
} Q 4CjA3
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SortUtil： )9,
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package org.rut.util.algorithm; zYXV;
&`b "a!
import org.rut.util.algorithm.support.BubbleSort; 1+b{}d
import org.rut.util.algorithm.support.HeapSort; k6`6Mjbc
import org.rut.util.algorithm.support.ImprovedMergeSort; 6y%0`!
import org.rut.util.algorithm.support.ImprovedQuickSort; b~dIk5>O
import org.rut.util.algorithm.support.InsertSort; sNun+xsf^
import org.rut.util.algorithm.support.MergeSort; A+@&"
import org.rut.util.algorithm.support.QuickSort; +_-bJo2a
import org.rut.util.algorithm.support.SelectionSort; -}K<ni6
import org.rut.util.algorithm.support.ShellSort; t|t#vcB
rD>*j~_+P
/** =PGs{?+&O
* @author treeroot 4Llo`K4
* @since 2006-2-2 L(GjZAP
* @version 1.0 O25lLNmO
*/ tabT0
public class SortUtil { w+1Gs ;
public final static int INSERT = 1; [qsEUc+Z.'
public final static int BUBBLE = 2; Z{'i F
public final static int SELECTION = 3; Y^<bl2"y8
public final static int SHELL = 4; 8Lw B B
public final static int QUICK = 5; KZ~*Nz+H2
public final static int IMPROVED_QUICK = 6; |>@W ]CX[
public final static int MERGE = 7; HR}bbsqxVf
public final static int IMPROVED_MERGE = 8; &/,|+U[
public final static int HEAP = 9; }i!J/tJ)b
CdL< *AH
public static void sort(int[] data) { yCCrK@{oo
sort(data, IMPROVED_QUICK); yA47"R
} I%urz!CNE*
private static String[] name={ SwZA6R&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" +SJd@y@fR
}; >:lnt /N3
},|M9I0
private static Sort[] impl=new Sort[]{ nS>8bub30
new InsertSort(), b86}% FM
new BubbleSort(), Uix6GT;
new SelectionSort(), P;4w*((} ~
new ShellSort(), QY== GfHt
new QuickSort(), o6$4/I
new ImprovedQuickSort(), aMTu-hA
new MergeSort(), l&?ii68/
new ImprovedMergeSort(), :%IoME
new HeapSort() B#9{-t3Vf
}; $ `7^+8vHV
k1Q?'<`
public static String toString(int algorithm){ {z|;Xi::"
return name[algorithm-1]; >t7x>_~
} AlJ} >u
W%\C_
public static void sort(int[] data, int algorithm) { z?35=%~w
impl[algorithm-1].sort(data); ,i@X'<;y
} Jec'`,Y
S{3nM<
public static interface Sort { 0]4(:(B
public void sort(int[] data); Z@r.pRr'
} 9?k_y ZV
#KO,~]k5|e
public static void swap(int[] data, int i, int j) { NF? vg/{
int temp = data; Dwzg/F(
data = data[j]; dUsxvho
data[j] = temp; ,~._}E&9I
} _Zr.ba
} !^ _"~