[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; sSwY!";
} p_]b=3wt~
int i1=l; -F*vN'
int i2=mid+1; Pw +nO
for(int cur=l;cur<=r;cur++){ [MKG5=kaE
if(i1==mid+1) Qm*ZOz'i
data[cur]=temp[i2++]; ?* ,
else if(i2>r) E y9rH_
data[cur]=temp[i1++]; $%M]2_W(
else if(temp[i1] data[cur]=temp[i1++]; |v : )9
else dKD:mU",M
data[cur]=temp[i2++]; imzPVGCD{
} u)r:0;5
} SsZSR.tD
Ac*J;fI
} \/\w|j
%K=_
改进后的归并排序: .L;e:cvx
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package org.rut.util.algorithm.support; {J/Fp#
kw#-\RR_c
import org.rut.util.algorithm.SortUtil; h~CLJoK<
.,#H]?Wil
/** j`$$BVZ
* @author treeroot 7Nk|9t
* @since 2006-2-2 Y6)o7t
* @version 1.0 bi",DKU{l
*/ |Ox='.oIb
public class ImprovedMergeSort implements SortUtil.Sort { xYW&Mfka
@^.W|Zh[&
private static final int THRESHOLD = 10; VlL%dN; 0
QX<x2U
/* [.Kp/,JY
* (non-Javadoc) 1kvs2
* |</)6r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (C).Vj~
*/ Ar,n=obG
public void sort(int[] data) { ,p(&G_
int[] temp=new int[data.length]; Ks6\lpr
mergeSort(data,temp,0,data.length-1); S++~w9}
} jf)l; \u
]b sabS?
private void mergeSort(int[] data, int[] temp, int l, int r) { -TG ="U
int i, j, k; b8YdONdy
int mid = (l + r) / 2; Kdp($L9r
if (l == r) G-RDQ
return; 3/ }
if ((mid - l) >= THRESHOLD) idX''%"
mergeSort(data, temp, l, mid); GPL%8 YY
else RB%y($
insertSort(data, l, mid - l + 1); LGZa l&9AY
if ((r - mid) > THRESHOLD) NV9JMB{q
mergeSort(data, temp, mid + 1, r); K5XW&|tY!
else |Nj6RB7
insertSort(data, mid + 1, r - mid); C&*1H`n
[>\|QS|
for (i = l; i <= mid; i++) { ]PoWL;E'
temp = data; fG$LqzyqlK
} ~gMt U
for (j = 1; j <= r - mid; j++) { rJCb8x+5a
temp[r - j + 1] = data[j + mid]; gM=:80
} m9i/rK_
int a = temp[l]; qnj'*]ysBC
int b = temp[r]; 4G&dBH
for (i = l, j = r, k = l; k <= r; k++) { iT,7jd?6#
if (a < b) { 2E!~RjxSY
data[k] = temp[i++]; btq4diW
a = temp; |Rhqi
} else { Q%d1n*;+
data[k] = temp[j--]; x(eX.>o\
b = temp[j]; HDZl;=
} Ur>1eN%9'
} {)!>e
} "2sk1
"UNFB3
/** 3+h3?
* @param data N1Ag.
* @param l -,p=;t#(
* @param i PS[ C!s&KE
*/ 1hGj?L0m.
private void insertSort(int[] data, int start, int len) { qa )BbK^i
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0.n[_?<(
} bSX/)')jU
} sTlel&
} E8}evi
} JDE_*xaUV
~qGW94
堆排序： fTvm2+.nX
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package org.rut.util.algorithm.support; Hy[: _E
er)I".|
import org.rut.util.algorithm.SortUtil; }>u `8'2v
RK|*yt"f"
/** P%(9`A
* @author treeroot }A24;'}
* @since 2006-2-2 %(lO>4>|
* @version 1.0 vb6EO[e%I
*/ ?[NC}LC
public class HeapSort implements SortUtil.Sort{ Q[7i
Nq6'7'x
/* (non-Javadoc) M }d:B)cz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) gK[;"R)4o@
*/ J}X{8Ds9
public void sort(int[] data) { 3$k#bC
MaxHeap h=new MaxHeap(); UDg's
h.init(data); 4F~^RR"
for(int i=0;i h.remove(); 3Hom0g,V4
System.arraycopy(h.queue,1,data,0,data.length); w#9KtW,tt
} =L" 0]4K
PFh ^Z L
private static class MaxHeap{ /^BC Qaj
=79R;|5
void init(int[] data){ Z,38eQpM
this.queue=new int[data.length+1]; 0d9z8y
for(int i=0;i queue[++size]=data; 8I#ir4z#<
fixUp(size); `)n4I:)2
} Vi8A4
} :/;/mHG]
EE!}$qOR
private int size=0; [!A[oK9i C
:-k|jt
private int[] queue; `R[ZY!=+
x.?5-3|d$
public int get() { ,JV0ib,
return queue[1]; RU:Rt'
} e /JQ #A
%x$U(I}
public void remove() { #]@HsVXh7
SortUtil.swap(queue,1,size--); ~-BF7f6C
fixDown(1); ^hC'\09=c
} 2ndn8_l
file://fixdown \j>7x
private void fixDown(int k) { 37/n"\4
int j; `@h|+`h
while ((j = k << 1) <= size) { +tqErh?Al
if (j < size %26amp;%26amp; queue[j] j++; 85GIEUvH/
if (queue[k]>queue[j]) file://不用交换 %T{]l;5
break; }Q/onBt
SortUtil.swap(queue,j,k); AC) M2;
k = j; jV3PTU
} =^nb+}Nz(
} _95296
private void fixUp(int k) { DYD<?._I
while (k > 1) { .w9LJ
int j = k >> 1; BPba3G9H
if (queue[j]>queue[k]) Cl}nPUoL
break; Nz,yd%ua
SortUtil.swap(queue,j,k); 9B: 3Ha=
k = j; DZ8|20b
} ` R6`"hx$
} \2i7\U
#&&T1;z"#
} _>;Wz7
!Lf<hS^
} V)`2Kw
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SortUtil： pN%&`]Wev
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package org.rut.util.algorithm; &v{Ehkr*
zH8E,)
import org.rut.util.algorithm.support.BubbleSort; fd\RS1[
import org.rut.util.algorithm.support.HeapSort; ):D"LC
import org.rut.util.algorithm.support.ImprovedMergeSort; ,^#Jw`w^
import org.rut.util.algorithm.support.ImprovedQuickSort; y/lF1{}5
import org.rut.util.algorithm.support.InsertSort; *gbK :*_J
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; $cCC 1=dW
import org.rut.util.algorithm.support.ShellSort; V#t_gS
T #\
/** "ZuuSi
* @author treeroot &XP(D5lf`B
* @since 2006-2-2 Bh>L"'.2
* @version 1.0 d8j1L/e
*/ P#,u9EIJ
public class SortUtil { QHEtG2
public final static int INSERT = 1; f!Q\M1t)
public final static int BUBBLE = 2; T~TP
public final static int SELECTION = 3; yB*,)x0 @
public final static int SHELL = 4; FK|O^->B
public final static int QUICK = 5; `2s!%/
public final static int IMPROVED_QUICK = 6; +K57. n{
public final static int MERGE = 7; WNjwv/
public final static int IMPROVED_MERGE = 8; kN1MPd4Yh
public final static int HEAP = 9; NO"PO @&Wk
Ccf/hA#mb
public static void sort(int[] data) { +eM${JyXH
sort(data, IMPROVED_QUICK); XpIiJry!6
} a&y^Ps6=
private static String[] name={ wbO6Ag@))
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" |?`5~f
}; RgE`Hr
{f!/:bM
private static Sort[] impl=new Sort[]{ 5,RUPaE
new InsertSort(), R?2sbK4Cz
new BubbleSort(), GF'wDi}
new SelectionSort(), 'Ts:.
new ShellSort(), qS!r<'F3dP
new QuickSort(), )?L=o0
new ImprovedQuickSort(), `zwz
new MergeSort(), i=8iK#2 h
new ImprovedMergeSort(), @=Kq99=\U
new HeapSort() fV(3RG
}; Lpchla$
pJpapA2l*6
public static String toString(int algorithm){ jcH@*c=%e
return name[algorithm-1]; nR!e(
} ( ?V`|[+u
PxHFH pL
public static void sort(int[] data, int algorithm) { !Brtao"m
impl[algorithm-1].sort(data); yC,/R371k
} WeI+|V$
|D3u"Y!:^
public static interface Sort { Q M,!-~t
public void sort(int[] data); &K)8
} #Ondhy%h[
)Nv1_en<!
public static void swap(int[] data, int i, int j) { VSj!Gm0LB
int temp = data; ~xH&"1
data = data[j]; +Q*`kg'
data[j] = temp; !,WGd|oJ
} TBhM^\z
} "q4tvcK.