[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; E3[9!L8gb
} Pi |Z\j)
int i1=l; ?u:mscb
int i2=mid+1; HWB\}jcA6u
for(int cur=l;cur<=r;cur++){ 9I [:#,zdf
if(i1==mid+1) 50Gu~No6
data[cur]=temp[i2++]; _Li.}g@Bd
else if(i2>r) He4HIZ
data[cur]=temp[i1++]; 0-{E% k
else if(temp[i1] data[cur]=temp[i1++]; islHtX VE
else \o2l;1~
data[cur]=temp[i2++]; V#.pi zb
} MZf?48"f
} N}NKQ]=
a?GXVQ
} &Z!y>k%6
$uFvZ?w&
改进后的归并排序: cr]b #z
ni2 [K`
package org.rut.util.algorithm.support; dMsS OP0E
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import org.rut.util.algorithm.SortUtil; .57Fh)Y
"q=ss:(
/** >@cBDS<6R
* @author treeroot 8%YyxoCH
* @since 2006-2-2 M=ag\1S&ZF
* @version 1.0 fK]%*i_"
*/ CMbID1M3
public class ImprovedMergeSort implements SortUtil.Sort { ;Gn>W+Ae M
4I2:"CK06
private static final int THRESHOLD = 10; pCo3%(
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/* /AOGn?Z3
* (non-Javadoc) <A|z
* 6LCR ;~ ]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m;rr7{7X
*/ 8tv4_Lbx
public void sort(int[] data) { C@]D*k
int[] temp=new int[data.length]; X 5}=|%Y
mergeSort(data,temp,0,data.length-1); FNOsw\Bo
} 5bXpj86mY
ia;osqW
private void mergeSort(int[] data, int[] temp, int l, int r) { _w%:PnO
int i, j, k; 09P2<oFLn
int mid = (l + r) / 2; u9,dSR
if (l == r) 1'("; 0I
return; d/Wp>A@dob
if ((mid - l) >= THRESHOLD) W-|CK&1
mergeSort(data, temp, l, mid); <P0 P*>M
else eg?p)|
insertSort(data, l, mid - l + 1); fr04nl
if ((r - mid) > THRESHOLD) ;vPFRiFK
mergeSort(data, temp, mid + 1, r); [4YRyx&:++
else No[9m_
insertSort(data, mid + 1, r - mid); 5izpQ'>
m*jE\+)=^
for (i = l; i <= mid; i++) { o$%KbfXO]
temp = data; TNN@G~@cm
} AX6:*aZB
for (j = 1; j <= r - mid; j++) { ecH7")
temp[r - j + 1] = data[j + mid]; R1Q,m
} U,T#{
int a = temp[l]; iR{@~JN=)
int b = temp[r]; hJ[keaO
for (i = l, j = r, k = l; k <= r; k++) { }1V+8'D
if (a < b) { JzCkVF$
data[k] = temp[i++]; ZrNH:Z:5
a = temp; 3Rsrb
} else { A['(@Bz#7~
data[k] = temp[j--]; TC'SDDX
b = temp[j]; -$=RQH$9
} v^Fu/Y
} 62.Cq!~
} G.@K#a9
-6s]7#IC
/** tP2.D:( R
* @param data '-I\G6w9
* @param l y,1U]1TP
* @param i ,|?#+O{
*/ x5smJ__/
private void insertSort(int[] data, int start, int len) { lB/^
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ;*FY+jM
} |9$C%@8
} -"2 t^Q
} %" mki>
} lWJYT<kt
,aP5)ZN-
堆排序： U Rq9:{
4, Vx3QFZ
package org.rut.util.algorithm.support; =s'H o
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import org.rut.util.algorithm.SortUtil; ]c'EJu
']c;$wP
/** iK1{SgXrFI
* @author treeroot 5"!K8 N
* @since 2006-2-2 z52F-<
* @version 1.0 .-MJ5d:
*/ ;"EDFH#W
public class HeapSort implements SortUtil.Sort{ Rc D5X{qS#
Yh"9,Z&wiR
/* (non-Javadoc) ngd4PN>{4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #wvGS%
*/ 7J$rA.tu
public void sort(int[] data) { (M{wkQTO
MaxHeap h=new MaxHeap(); |d6/gSiF
h.init(data); ;O,&MR{;|n
for(int i=0;i h.remove(); =)i^E9
System.arraycopy(h.queue,1,data,0,data.length); |FlB#
} RhF<{U.
mKV31wvK}
private static class MaxHeap{ pK_zq
rij%l+%@#
void init(int[] data){ 'zMmJl}\vd
this.queue=new int[data.length+1]; F/tRyq`D
for(int i=0;i queue[++size]=data; Wie0r@5E
fixUp(size); F8tMZ,:
} .ty2! .
} gwg~4:W
).u>%4=6
private int size=0; /Hm/%os
/J!hKK^k
private int[] queue; &pz`gna
e,#5I(E
public int get() { HD$`ZV
return queue[1]; TI"Ki$jC
} {LqYb:/C5U
tId,Q>zH
public void remove() { lq`7$7-4
SortUtil.swap(queue,1,size--); @V Tw>=94
fixDown(1); oHSDi
} MDd2B9cy[
file://fixdown I7|a,Q^f
private void fixDown(int k) { ev/)#i#s{
int j; R&P^rrC@B5
while ((j = k << 1) <= size) { ?aTC+\=
if (j < size %26amp;%26amp; queue[j] j++; CJ)u#PmkJ
if (queue[k]>queue[j]) file://不用交换 *?Wr^T
break; +mKII>{
SortUtil.swap(queue,j,k); km lb,P
k = j; a #p`l>rx
} X ) =-a
} aGE} EK}
private void fixUp(int k) { vt(n: Xk
while (k > 1) { PT&qys2k
int j = k >> 1; @&Yl'&pn-R
if (queue[j]>queue[k]) !>K=@9NC|.
break; Dp} $q`F[
SortUtil.swap(queue,j,k); PIQd=%?'
k = j; qla=LS\-A+
} b1=! "Y@
} E J6|y'
SwrzW'%A
} _qt
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} -I#<?=0B
m,w^,)
SortUtil： }>YEtA
^QHgc_oDm
package org.rut.util.algorithm; pMUUF5
y=SpIbn{
import org.rut.util.algorithm.support.BubbleSort; Y~lOkH[z
import org.rut.util.algorithm.support.HeapSort; pg<cvok
import org.rut.util.algorithm.support.ImprovedMergeSort; P{2ED1T\
import org.rut.util.algorithm.support.ImprovedQuickSort; $3970ni,?O
import org.rut.util.algorithm.support.InsertSort; ~_-+Q=3
import org.rut.util.algorithm.support.MergeSort; {K/xI
import org.rut.util.algorithm.support.QuickSort; ;'<SsI
import org.rut.util.algorithm.support.SelectionSort; t`V U<
import org.rut.util.algorithm.support.ShellSort; EzCi%>q
YsTF10
/** Ac +fL
* @author treeroot kO/;lrwC
* @since 2006-2-2 AVc|(~V
* @version 1.0 "Vwk&~B%
*/ [>QzT"=
public class SortUtil { *;T HD>
public final static int INSERT = 1; i(q a'*
public final static int BUBBLE = 2; OG7U+d6
public final static int SELECTION = 3; v}^uN+a5
public final static int SHELL = 4; v?DA>
public final static int QUICK = 5; "!Hm.^1
public final static int IMPROVED_QUICK = 6; Q9JT6
public final static int MERGE = 7; /zir$
public final static int IMPROVED_MERGE = 8; ( M3-S5
public final static int HEAP = 9; 5* ~EdT
^7$Q"
public static void sort(int[] data) { GN|xd+O_
sort(data, IMPROVED_QUICK); VK}H;
} :+fW#:
private static String[] name={ uH)v\Js
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Nb>C5TjR
}; 0qN?4h)7
a)/ }T
private static Sort[] impl=new Sort[]{ >-CNHb
new InsertSort(), +/#Lm#*nu%
new BubbleSort(), GM@0$
new SelectionSort(), ;|Rrtf9
new ShellSort(), ?SoRi</1
new QuickSort(), hBW,J$B
new ImprovedQuickSort(), p;2NO&
new MergeSort(), a 0qDRB
new ImprovedMergeSort(), *{e,< DV
new HeapSort() :YmFQ>e?
}; 9NC'iFQ#
EI&)+cC
public static String toString(int algorithm){ l9NET
return name[algorithm-1]; ^JB5-EtL(
} P;p20+
TaTw,K|/
public static void sort(int[] data, int algorithm) { O-<nLB!Wf
impl[algorithm-1].sort(data); lhFv2.qR
} ~NwX,-ri
$-mwr,i
public static interface Sort { W -5wjc
public void sort(int[] data); R%r<AL5kJk
} L'x[wM0w;
0tN/P+!|
public static void swap(int[] data, int i, int j) { p=f8A71
int temp = data; E uk[ @1
data = data[j]; hr GfA
data[j] = temp; fq[,9lK
} 9m2Yrj93
} )^Md ^\?