[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; kVM*[<k
} ~&p]kmwXSX
int i1=l; q6$6:L,<
int i2=mid+1; T88$sD.2 '
for(int cur=l;cur<=r;cur++){ NpZ'pBl
if(i1==mid+1) 9ThsR&h3
data[cur]=temp[i2++]; QxE%C
else if(i2>r) ty~Sf-Pri
data[cur]=temp[i1++]; d!:/n
else if(temp[i1] data[cur]=temp[i1++]; w^&UMX}
else PSu]I?WF
data[cur]=temp[i2++]; ]kmAN65c
} *!y04'p`<
} c^1JSGv
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} aC1 xt(
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改进后的归并排序: 3{co.+
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package org.rut.util.algorithm.support; ^0>^5l'n
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import org.rut.util.algorithm.SortUtil; 4`#%<G
hl**G4z9q
/** GYIQ[#'d7
* @author treeroot A@lM=
* @since 2006-2-2 jWxa [>
* @version 1.0 7mi*#X}
*/ W%ix|R^2]
public class ImprovedMergeSort implements SortUtil.Sort { g~K-'Nw
bt=D<YZk
private static final int THRESHOLD = 10; 8M!9gvcaO
$<Gt^3e
/* EB+4]MsD
* (non-Javadoc) u"v$[8
* "[["naa
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) '!Va9m*w7
*/ B &Z0ZWx
public void sort(int[] data) { =r]_$r%gR
int[] temp=new int[data.length]; !K*3bY`#
mergeSort(data,temp,0,data.length-1); F'{T[MA
} #oEtLb@O
R6;229e
private void mergeSort(int[] data, int[] temp, int l, int r) { w\d1
int i, j, k; 6I=d0m.io
int mid = (l + r) / 2; gPKO-Fsd"
if (l == r) |Zn,|-iW
return; %iIr %P?
if ((mid - l) >= THRESHOLD) H/x9w[\+[
mergeSort(data, temp, l, mid); QrmGrRH
else lp$,`Uz`
insertSort(data, l, mid - l + 1); 6tVp%@
if ((r - mid) > THRESHOLD) e jk?If 07
mergeSort(data, temp, mid + 1, r); 8[^b8^
else [C 7X#|
insertSort(data, mid + 1, r - mid); <MhODC")
ZyC[w7$I2
for (i = l; i <= mid; i++) { >/GYw"KK
temp = data; O&.gc p!
} tJd/uQJ
for (j = 1; j <= r - mid; j++) { ri"=)]
temp[r - j + 1] = data[j + mid]; x51p'bNy
} !_o1;GzK
int a = temp[l]; 2V9"{F?
int b = temp[r]; !h1|B7N
for (i = l, j = r, k = l; k <= r; k++) { =hh,yi
if (a < b) { @&G %cW(
data[k] = temp[i++]; bsc b
a = temp; q}JP;p(#
} else { 9~f RYA*
data[k] = temp[j--]; }236{)DuN
b = temp[j]; Pa\yp?({q
} G7-.d/8|^
} /WAOpf5
} `a7b,d
K^AIqL8
/** 8.`5"9Vh
* @param data 0R+<^6^l)
* @param l I%{D5.du
* @param i g ?%]()E
*/ EJ:2]!O
private void insertSort(int[] data, int start, int len) { czo*_q%
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /4*>.Nmb,f
} =cR=E{20
} 0F 4%Xz
} 1@]gBv<
} 5X-d,8{w _
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堆排序： 7&|&y SCu
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package org.rut.util.algorithm.support; [DSzhi]
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import org.rut.util.algorithm.SortUtil; jA%R8hdr_
[QT H~
/** J]*?_>"#8
* @author treeroot ;ahI}}
* @since 2006-2-2 JHVesX
* @version 1.0 olDzmy(=W*
*/ 9qJ:h-?M
public class HeapSort implements SortUtil.Sort{ Qo["K}Ty
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/* (non-Javadoc) zv\T;_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l(tMo7iPa
*/ DoJ3zYEk
public void sort(int[] data) { XlxB%
MaxHeap h=new MaxHeap(); QfU{W@!h
h.init(data); Kv\uBMJNW
for(int i=0;i h.remove(); P<xCg
System.arraycopy(h.queue,1,data,0,data.length); ( v=Z$#l
} :?gk=JH:
Q;p% VQ
private static class MaxHeap{ CM%;r5
"g;}B"rG
void init(int[] data){ K&vqk/JW1
this.queue=new int[data.length+1]; %LdFS~
for(int i=0;i queue[++size]=data; yD&UH_ 1g
fixUp(size); AUkePp78
} ,?!4P+ob
} G-T2b,J [
q&k?$rn
private int size=0; 3)py|W%X$
qc^qCGy!z
private int[] queue; ATU]KL!{
!RdubM
public int get() { O:O +Q!58
return queue[1]; u#34mg..
} lLeN`{?
5l(NX
public void remove() { :,dO7dJi
SortUtil.swap(queue,1,size--); ApAHa]Ccp
fixDown(1); (=i+{ 3`|
} DKf:0E8
file://fixdown O>L 5 dP
private void fixDown(int k) { 9"k^:}8.
int j; =dI2j@}c
while ((j = k << 1) <= size) { 1|\/2
if (j < size %26amp;%26amp; queue[j] j++; M6b6lhg
if (queue[k]>queue[j]) file://不用交换 )eSD5hOI)
break; .3T#:Hl
SortUtil.swap(queue,j,k); tJY3k$YX
k = j; lMBXD?,,J
} _NJq%-,'
} . !;K5U
private void fixUp(int k) { !"x&tF
while (k > 1) { 7j L.\O
int j = k >> 1; 7q _.@J
if (queue[j]>queue[k]) m:XMF)tW
break; ghqq%g
SortUtil.swap(queue,j,k); !|S{e^WhbU
k = j; 0V:PRq;v0
} &ffd#2f`@
} q--;5"=S
>NN&j#;x~
} r$Ck:Q}
<ekLL{/O'
} d>NM4n[h8
@5\ns-%
SortUtil： |\~!oN
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package org.rut.util.algorithm; -gKo@I
mC(q8%/;
import org.rut.util.algorithm.support.BubbleSort; :CAbGs:56
import org.rut.util.algorithm.support.HeapSort; ep2#a#&'
import org.rut.util.algorithm.support.ImprovedMergeSort; t<2B3&o1
import org.rut.util.algorithm.support.ImprovedQuickSort; eE-@dU?
import org.rut.util.algorithm.support.InsertSort; A5> ,e|
import org.rut.util.algorithm.support.MergeSort; |cE 69UFB
import org.rut.util.algorithm.support.QuickSort; zcNv T
import org.rut.util.algorithm.support.SelectionSort; ta 66AEc9
import org.rut.util.algorithm.support.ShellSort; PxHHh{y%c
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/** H|0GRjC
* @author treeroot AlRng&o~
* @since 2006-2-2 IvyBK]{|
* @version 1.0 `by\@xQ)
*/ 5b2_{6t
public class SortUtil { tk <R|i
public final static int INSERT = 1; &qP&=( $
public final static int BUBBLE = 2; u;qBW uO
public final static int SELECTION = 3; xui.63/
public final static int SHELL = 4; 0 ))W [
public final static int QUICK = 5; )N4_SA
public final static int IMPROVED_QUICK = 6; #\]:lr{>?4
public final static int MERGE = 7; +5+?)8Ls
public final static int IMPROVED_MERGE = 8; n^AQ!wC
public final static int HEAP = 9; 2& l~8,
zLxO\R!d
public static void sort(int[] data) { "NamP\hj
sort(data, IMPROVED_QUICK); hkq[xgX
} ZsPT!l,
private static String[] name={ t:G67^<3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C"P40VQoo
}; 5xawa:K
(ft8,^=4
private static Sort[] impl=new Sort[]{ >wpC45n)9N
new InsertSort(), f|f9[h'
new BubbleSort(), ,NQucp
new SelectionSort(), D|}%(N@sl
new ShellSort(), Ol~jq;75
new QuickSort(), U h'1f7%
new ImprovedQuickSort(), Q~A25Jf.
new MergeSort(), 2=TQU33#
new ImprovedMergeSort(), Uva b*9vX
new HeapSort() bI,gNVN=
}; B9RB/vHH
-&u2C}4s
public static String toString(int algorithm){ &K_"5.7-56
return name[algorithm-1]; y[s* %yP3l
} 8)D5loS
;oQ*gd
public static void sort(int[] data, int algorithm) { <d GGH
impl[algorithm-1].sort(data); 1h.N &;vy
} q.l"Y#d
Fx.hti
public static interface Sort { +d0&(b
public void sort(int[] data); \WnI&nu
} J<<0U;
<= xmJx-V
public static void swap(int[] data, int i, int j) { +|N!(H
int temp = data; ,[lS)`G
data = data[j]; ix<sorR H
data[j] = temp; k#I4^
} hDp -,ag{
} JwNG`MGc