[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; D*_Z"q_B
} &eA!h
int i1=l; " J4?Sb<
int i2=mid+1; d~QZcR
for(int cur=l;cur<=r;cur++){ fK 4,k:YC
if(i1==mid+1) [@_IUvf^.
data[cur]=temp[i2++]; ~DL-@*&
else if(i2>r) 9M]%h
data[cur]=temp[i1++]; Jn\@wF9xd
else if(temp[i1] data[cur]=temp[i1++]; >?L)+*^
else D!g\-y
data[cur]=temp[i2++]; 7;8DKY q
} F!RzF7h1
} IE*5p6IM~
~[Fh+t(Y
} QAxR'.d
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改进后的归并排序: ABIQi[A
LlF|VR&P.
package org.rut.util.algorithm.support; xRrKrs&eE
n/ CP2A
import org.rut.util.algorithm.SortUtil; SHA6;y+U/~
6uu49x_^L4
/** ^1\[hyZ!
* @author treeroot hpBn_
* @since 2006-2-2 A+QOox]<
* @version 1.0 Io*mFa?
*/ b/]@G05>>
public class ImprovedMergeSort implements SortUtil.Sort { 1nZ7xCDK98
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private static final int THRESHOLD = 10; ETQL,t9m
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/* m=#<
* (non-Javadoc) JY0}#FtgV
* dfR?O#JPU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?y|8bw<
*/ CkeqK
public void sort(int[] data) { |h 3`z
int[] temp=new int[data.length]; :c3'U_H^
mergeSort(data,temp,0,data.length-1); p5V.O20
} ']^_W0?=
cs-dvpMZ
private void mergeSort(int[] data, int[] temp, int l, int r) { vO 3-B
int i, j, k; yyv<MSU8
int mid = (l + r) / 2; '{F Od_uk%
if (l == r) VthM`~3
return; 8eDKN9kq
if ((mid - l) >= THRESHOLD) d-ML[^G
mergeSort(data, temp, l, mid); Fu*Qci1Z
else E/Adi^
insertSort(data, l, mid - l + 1); q6T>y%|FZ
if ((r - mid) > THRESHOLD) Pm=i(TBS/
mergeSort(data, temp, mid + 1, r); q+1SU6x'm
else 0N`'a?x
insertSort(data, mid + 1, r - mid); cHw-;
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for (i = l; i <= mid; i++) { cS;O]>/5
temp = data; y"nL9r.,:
} ,0^9VWZV
for (j = 1; j <= r - mid; j++) { 5cZKk/"Ad}
temp[r - j + 1] = data[j + mid]; zz[[9Am!
} 9oA-Swc[
int a = temp[l]; mKZ^FgG
int b = temp[r]; "SFs\] Z
for (i = l, j = r, k = l; k <= r; k++) { Y}hz UKJ
if (a < b) { hB1Gtc4n
data[k] = temp[i++]; I`KBj6n
a = temp; $[HpY)MSRw
} else { Q^|aix~ K
data[k] = temp[j--]; f'&
b = temp[j]; lFc4| _c g
} z\6/?5D#v
} N,?D<NjXl
} dY$jg
*rmwTD"
/** U\`yLsKvH`
* @param data q,fk@GI'2
* @param l =G-u "QJ6
* @param i E|BiK
*/ eSA%:Is.
private void insertSort(int[] data, int start, int len) { /GU%{nT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); H\RuYCn2G
} F^}n7h=qk
} $-R9J6NN
} :}[[G2|9
} TM$Ek^fQ.
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堆排序： F/chE c V
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package org.rut.util.algorithm.support; DOGg=`XK1
]qNPOnlp
import org.rut.util.algorithm.SortUtil; F<^93a9
% ovk}}%;
/** h| ]BA}D
* @author treeroot RWK##VHK
* @since 2006-2-2 Dwi[aC+k
* @version 1.0 :rX/ILAr
*/ n$YCIW)0
public class HeapSort implements SortUtil.Sort{ 'P,F)*kh
WgC*bp{
/* (non-Javadoc) CJ 9tO#R
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #^;^_
*/ 8- ]7>2?_
public void sort(int[] data) { (??|\ &DTi
MaxHeap h=new MaxHeap(); sow/JLlbC
h.init(data); &`A2&mZ
for(int i=0;i h.remove(); Co^a$K
System.arraycopy(h.queue,1,data,0,data.length); EL=}xug,?
} ]Zz<9zix
*|Fl&`2
private static class MaxHeap{ +gsk}>"
DU: sQS4
void init(int[] data){ d8T,33>T
this.queue=new int[data.length+1]; #p^r)+\3=
for(int i=0;i queue[++size]=data; 9,;+B8-A
fixUp(size); R@H}n3,
} BlvNBB1^
} !WReThq
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private int size=0; [j`-R 0Np
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private int[] queue; @5-+>\Hd^t
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public int get() { !saKAb}d7H
return queue[1]; :j m|)
} 7OOod1
tHo0q<.oX
public void remove() { 5`3f"(ay/
SortUtil.swap(queue,1,size--); .5m^)hi
fixDown(1); ^. i;,
} xuDn:
file://fixdown e`Z3{H}
private void fixDown(int k) { YJ{d\j
int j; wOp# mT
while ((j = k << 1) <= size) { XT5Vo
if (j < size %26amp;%26amp; queue[j] j++; SY}iU@xo
if (queue[k]>queue[j]) file://不用交换 <AB.`["
break; T6ZJSKM
SortUtil.swap(queue,j,k); ,-XJ@@2gM
k = j; t(:6S$6{e
} e[@ ^UY
} 2)^[SpZ
private void fixUp(int k) { 7" wn024
while (k > 1) { x{|n>3l`b9
int j = k >> 1; uPpRzp
if (queue[j]>queue[k]) dsxaxbVj%
break; d4P0f'.z
SortUtil.swap(queue,j,k); 5}4MXI4
k = j; TIa`cU`
} (u >:G6K
} kty,hAXe
Px4zI9;cB
} u?f3&pA
#dGg !D
} '#.:%4
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SortUtil： BVC{Zq6hi
Hvq< _&2
package org.rut.util.algorithm; 7=ZB;(`L1
xUD$i?3z
import org.rut.util.algorithm.support.BubbleSort; XjwTjgL<
import org.rut.util.algorithm.support.HeapSort; `<>8tZS9"
import org.rut.util.algorithm.support.ImprovedMergeSort; A{E0 a:v
import org.rut.util.algorithm.support.ImprovedQuickSort; Y4Z?`TL
import org.rut.util.algorithm.support.InsertSort; 1Nk}W!v
import org.rut.util.algorithm.support.MergeSort; (t9qwSS8z
import org.rut.util.algorithm.support.QuickSort; Tj{!Fx^H
import org.rut.util.algorithm.support.SelectionSort; 7,e=|%7.
import org.rut.util.algorithm.support.ShellSort; >~$ S!
.6E7 R
/** AMYoSc
* @author treeroot A_%}kt (6
* @since 2006-2-2 J 6S
* @version 1.0 I#Tl
*/ Hf %;FaJ=
public class SortUtil { ^aZ Wu|p
public final static int INSERT = 1; +>OEp* j
public final static int BUBBLE = 2; DZXv3gnX
public final static int SELECTION = 3; _pNUI{De
public final static int SHELL = 4; "7)F";_(^
public final static int QUICK = 5; ryx<^q
public final static int IMPROVED_QUICK = 6; @ec QVk
public final static int MERGE = 7; r\[HR ^`
public final static int IMPROVED_MERGE = 8; i*Y/q-N|
public final static int HEAP = 9; 't{=n[
5Tpn`2F
public static void sort(int[] data) { |U^ ff^]
sort(data, IMPROVED_QUICK); 2uWzcy ?F
} 5Kv=;o=U
private static String[] name={ ,h]N*Z-I"
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :7Vm]xd}do
}; 4:<0i0)5
zPV/{)S
private static Sort[] impl=new Sort[]{ G-n`X":$DT
new InsertSort(), ^B& Z
new BubbleSort(), F;ONo.v;
new SelectionSort(), TL7-uH
new ShellSort(), ^@)/VfVg
new QuickSort(), VUF7-C*
new ImprovedQuickSort(), @;<w"j`r
new MergeSort(), ]jHB'Y
new ImprovedMergeSort(), 317Buk
new HeapSort() ]V@!kg(p8
}; {=g-zsc]K
>M:5yk@
public static String toString(int algorithm){ 4g1u9Sc0
return name[algorithm-1]; K)Db3JIIk
} CaBTqo
&9s6p6eb
public static void sort(int[] data, int algorithm) { O~,^x$ve
impl[algorithm-1].sort(data); X\%],"9%
} {b<8Z*4W
5[gkGKkf_
public static interface Sort { ?o.G@-
public void sort(int[] data); =,@SZsM*B
} jQ`"Op 3
?$n<vF>
public static void swap(int[] data, int i, int j) { D}"GrY5
int temp = data; 9D#PO">|
data = data[j]; N%B#f\N
data[j] = temp; //+UQgl6
} (`!| Uf$
} +&?VA!}.