[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; S-Bx`e9'
} YHu]\'Ff
int i1=l; goF87^M
int i2=mid+1; [eOv fD
for(int cur=l;cur<=r;cur++){ v4'kV:;&
if(i1==mid+1) dkDPze9l
data[cur]=temp[i2++]; wsH_pF
else if(i2>r) q~W:W}z
data[cur]=temp[i1++]; bX:h"6{=R
else if(temp[i1] data[cur]=temp[i1++]; q3h&V
else i`+bSg
data[cur]=temp[i2++]; T,>L
} nfGI4ZE
} %.$7-+:7A
t&[<Dl/L
} Yc_(g0NK
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改进后的归并排序: ]b sabS?
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package org.rut.util.algorithm.support; dkCUU
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import org.rut.util.algorithm.SortUtil; <LXx_{=:
SZ$WC8AX
/** v3XM-+Z4
* @author treeroot 10c.#9$
* @since 2006-2-2 p nI=
* @version 1.0 )78T+7Kq
*/ 0jjtx'F
public class ImprovedMergeSort implements SortUtil.Sort { %+Z*-iX
BbCO K
private static final int THRESHOLD = 10; woPj>M
t8xXGWk0
/* .PR+_a-X
* (non-Javadoc) {]dtA&8(
* fG$LqzyqlK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~gMt U
*/ %-.;sO=g
public void sort(int[] data) { rvd%z7Z1o
int[] temp=new int[data.length]; !3mt<i]a"
mergeSort(data,temp,0,data.length-1); S7PWP<9
} sO6=w%l^
iT,7jd?6#
private void mergeSort(int[] data, int[] temp, int l, int r) { 2E!~RjxSY
int i, j, k; btq4diW
int mid = (l + r) / 2; SUUN_w~
if (l == r) 3z2 OW@zL$
return; 6(4d3}F
if ((mid - l) >= THRESHOLD) *x;4::'Jn
mergeSort(data, temp, l, mid); :N$-SV
else r-.@MbBm
insertSort(data, l, mid - l + 1); h"0)spF"d
if ((r - mid) > THRESHOLD) u5glKE
mergeSort(data, temp, mid + 1, r); h !R=t
else dpNERc5
insertSort(data, mid + 1, r - mid); p@4GI[4
0NC70+4L
for (i = l; i <= mid; i++) { 7dACbqba
temp = data; pb)8?1O|s
} rZaO^}u]
for (j = 1; j <= r - mid; j++) { Z f\~Cl
temp[r - j + 1] = data[j + mid]; fC*cqc~{@
} -,p=;t#(
int a = temp[l]; @v#P u_
int b = temp[r]; \i%mokfbc
for (i = l, j = r, k = l; k <= r; k++) { (4A'$O2
if (a < b) { [x>Ju&))$
data[k] = temp[i++]; 9CeR^/i
a = temp; 6:Z8d%Z
} else { tLfhW1"
data[k] = temp[j--]; 3Ioe#*5\
b = temp[j]; =uAy/S
} wT::b V{
} GjHR.p?-
} q=BljSX
\P?X`]NwnO
/** T+$H[&j
* @param data }F_c0zM
* @param l KbvMp1'9P
* @param i zN|k*}j1J
*/ SFDTHvXu#_
private void insertSort(int[] data, int start, int len) { Q zaD\^OF
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); uu,F5<y[
} ZqVbNIY
} 'OziP
} jj2\;b:a0
} u%)gnj_
qclc--fsE
堆排序： }>0>OqvF
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package org.rut.util.algorithm.support; &.*UVc2+Y
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import org.rut.util.algorithm.SortUtil; e:9EP,
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/** {a:05Y
* @author treeroot TI< x;p
* @since 2006-2-2 NEri{qxm
* @version 1.0 Nq6'7'x
*/ x2#JD|0
public class HeapSort implements SortUtil.Sort{ p#ar`-vQ
"}fweCBgo
/* (non-Javadoc) jBw)8~tYm
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) K -rR)-rI
*/ ls]N&!/hq
public void sort(int[] data) { U-u?oU-.'
MaxHeap h=new MaxHeap(); )P:^A9&_n=
h.init(data); IFX$\+-
for(int i=0;i h.remove(); cZ?QI6|[
System.arraycopy(h.queue,1,data,0,data.length); d-UeItyW*
} rXX>I;`&
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private static class MaxHeap{ #lP8/-s^
;X,u
void init(int[] data){ "[|b,fxR
this.queue=new int[data.length+1]; 2Kz+COP+
for(int i=0;i queue[++size]=data; xZ9:9/Vg
fixUp(size); %7)=k}4
} p?rlx#M
} YNU}R/u6^
7R2O[=Szq
private int size=0; kk3^m1
<'I["Um
private int[] queue; :;7I_tb
fo@^=-4A-
public int get() { [s{!
return queue[1]; St-uE|8
} y!77gx?-
A]/o-S_
public void remove() { { :tO RF
SortUtil.swap(queue,1,size--); @dDeOnF
fixDown(1); pFd8p@m_2
} "n!yK
file://fixdown ;"wCBuXcu
private void fixDown(int k) { i/ilG3m>
int j; B;1qy[
while ((j = k << 1) <= size) { ~.m<`~u
if (j < size %26amp;%26amp; queue[j] j++; F3qK6Ah.
if (queue[k]>queue[j]) file://不用交换 )?*YrWO{
break; I9*cEZ!l=e
SortUtil.swap(queue,j,k); n~*".ZC'Y
k = j; %X{EupiFA
} @Iv;y*y
} fe?Z33V
private void fixUp(int k) { }~XWtWbd-
while (k > 1) { 'jtC#:ePK
int j = k >> 1; Wp=3heCa6
if (queue[j]>queue[k]) ~f1g"
break; QOF@DvQ
SortUtil.swap(queue,j,k); pIJXP$v3
k = j; 4]y)YNQ(
} pE4a~:
} k&]nF,f
Z',!LK!
} Ma[EgG
{3tzr;c?
} e`D}[G#
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SortUtil： 6Xlzdt
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package org.rut.util.algorithm; W7i|uTM
t;&XIG~
import org.rut.util.algorithm.support.BubbleSort; ,S8K!
import org.rut.util.algorithm.support.HeapSort; 4>hHUz[_
import org.rut.util.algorithm.support.ImprovedMergeSort; aLJm%uW6m&
import org.rut.util.algorithm.support.ImprovedQuickSort; g{65QP
import org.rut.util.algorithm.support.InsertSort; @X2*O9
import org.rut.util.algorithm.support.MergeSort; \c=I!<9
import org.rut.util.algorithm.support.QuickSort; {*ak>Wud
import org.rut.util.algorithm.support.SelectionSort; $cCC 1=dW
import org.rut.util.algorithm.support.ShellSort; V#t_gS
T #\
/** "ZuuSi
* @author treeroot &XP(D5lf`B
* @since 2006-2-2 Bh>L"'.2
* @version 1.0 xP9(J 0y
*/ `Lf'/q
public class SortUtil { n|SV)92o1
public final static int INSERT = 1; z$32rt8{`v
public final static int BUBBLE = 2; `2s!%/
public final static int SELECTION = 3; Hcq.Lq;2:
public final static int SHELL = 4; 'rD6MY
public final static int QUICK = 5; NO"PO @&Wk
public final static int IMPROVED_QUICK = 6; Ccf/hA#mb
public final static int MERGE = 7; +eM${JyXH
public final static int IMPROVED_MERGE = 8; XpIiJry!6
public final static int HEAP = 9; a&y^Ps6=
c7Z4u|G
public static void sort(int[] data) { C6_(j48&
sort(data, IMPROVED_QUICK); ?Ec9rM\ze
} RU)35oEV|
private static String[] name={ Y?VbgOM)
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {f!/:bM
}; ?9b9{c'an
5,RUPaE
private static Sort[] impl=new Sort[]{ R?2sbK4Cz
new InsertSort(), GF'wDi}
new BubbleSort(), 'Ts:.
new SelectionSort(), qS!r<'F3dP
new ShellSort(), -EjXVn! vQ
new QuickSort(), `2~>$Tr
new ImprovedQuickSort(), .J"N}
new MergeSort(), 3dShznlf_*
new ImprovedMergeSort(), gg;r;3u
new HeapSort() E h%61/
}; 5jdZC(q5a
)xGAe#E~j
public static String toString(int algorithm){ ]$ew 5%
return name[algorithm-1]; [uq>b|`RG
} z3fv}_\z
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public static void sort(int[] data, int algorithm) { L"L3n,%F
impl[algorithm-1].sort(data); &J[a.:..
} Pf?kNJ*Tv)
*dzZOe>,
public static interface Sort { E*_^+ %
public void sort(int[] data); ));#oQol9
} 5sD,gZ7
=lXj%V^8N
public static void swap(int[] data, int i, int j) { ?0tg}0|
int temp = data; da{]B5p\
data = data[j]; $EMOz=)I#
data[j] = temp; s:`i~hjq
} 85{m+1O~
} <_tmkLeZf