[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; <Z9N}wY,8
} F7qQrE5bl
int i1=l; kG]FB.@bG
int i2=mid+1; o`ijdg!5qG
for(int cur=l;cur<=r;cur++){ ? Eh)JJt
if(i1==mid+1) /N\[ C"8
data[cur]=temp[i2++]; Z)H9D(Za
else if(i2>r) tvvRHvL
data[cur]=temp[i1++]; 1M/_:UH`
else if(temp[i1] data[cur]=temp[i1++]; }TAHVcX*p
else naWW i]9
data[cur]=temp[i2++]; >-<7 r?~
} 9_\1cSk'
} >&2n\HR\
%^66(n)
} 9Y-6e0B:
RF.8zea{O`
改进后的归并排序: @;H1s4OZ
P :D6w){
package org.rut.util.algorithm.support; 5nJmabw3
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import org.rut.util.algorithm.SortUtil; tD !$!\`O
9x9~u8j
/** 9='=wWW
* @author treeroot p}R3AJ
* @since 2006-2-2 qox31pnS
* @version 1.0 %y}l^P5z
*/ >6zXr.
public class ImprovedMergeSort implements SortUtil.Sort { a76`"(W
V61.UEN
private static final int THRESHOLD = 10; zWEt< `1M
Ww$?X LF
/* f8?c[%br
* (non-Javadoc) .jjvS
* !aub@wH3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) qT+:oMrTSm
*/ %O_Ed {G4t
public void sort(int[] data) { N8w@8|KM
int[] temp=new int[data.length]; ~J,e^$u
mergeSort(data,temp,0,data.length-1); ^N_?&pgy
} oN6 '%
*/yR_f
private void mergeSort(int[] data, int[] temp, int l, int r) { 4w-P%-4
int i, j, k; 9Wi+7_)
int mid = (l + r) / 2; jFMf=u&U
if (l == r) G Za<
return; Y>: e4Q
if ((mid - l) >= THRESHOLD) p[M*<==4
mergeSort(data, temp, l, mid); F),wj8#~>-
else 5W=jQ3 C
insertSort(data, l, mid - l + 1); &fYV FRVkq
if ((r - mid) > THRESHOLD) .kkrU
mergeSort(data, temp, mid + 1, r); wX*F'r"z
else F-2&P:sjQ
insertSort(data, mid + 1, r - mid); ' Zmslijf
b#[7A
for (i = l; i <= mid; i++) { IHlTp0?
temp = data; lwuslt*E/
} \a}W{e=FNT
for (j = 1; j <= r - mid; j++) { 51lN,VVD
temp[r - j + 1] = data[j + mid]; =/jCDY
} z4yV1
int a = temp[l]; my^2}>wi
int b = temp[r]; 5U+a{oA
for (i = l, j = r, k = l; k <= r; k++) { B&oP0 jS
if (a < b) { d;9F2,k$w
data[k] = temp[i++]; E\!<=
a = temp; T=n)ea A
} else { #+,O
data[k] = temp[j--]; m=uW:~
b = temp[j]; rF8nz:8
} ai,Nx:r
} 5*W<6ia
} XLNR%)l
k^Q>
/** Lu@'Ee!>G
* @param data N}tiaL4
* @param l QirS=H+~
* @param i h (1 }g/
*/ pZv>{=2hOS
private void insertSort(int[] data, int start, int len) { \P` mV9P
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); aV'r oxM
} 2PSt*(
} 6#rj3^]
} j >wT-s
} 8QYM/yAM
wpLC,
堆排序： )m7 Yo
U1wsCH3+n
package org.rut.util.algorithm.support; v!EE[[
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import org.rut.util.algorithm.SortUtil; &7CAxU;i3
5,<:|/r
/** ?Q XS?
* @author treeroot ucVn `
* @since 2006-2-2 _(Qec?[^Ps
* @version 1.0 fq2t^c|$
*/ WKB8k-.]ww
public class HeapSort implements SortUtil.Sort{ }dt7n65
>x$.mXX{
/* (non-Javadoc) P}Ud7Vil;l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) >(aGk{e1
*/ jg_##Oha
public void sort(int[] data) { sZ!/uN!6
MaxHeap h=new MaxHeap(); CI };$4W~
h.init(data); XvIrO]F-
for(int i=0;i h.remove(); L,B#%t
System.arraycopy(h.queue,1,data,0,data.length); aF~ 0\XC
} {IlX@qWr
DWQ@]\
private static class MaxHeap{ (K(6`~
JWuF ?<+k
void init(int[] data){ !VJ5(b
this.queue=new int[data.length+1]; 9<ev]XaSl
for(int i=0;i queue[++size]=data; rprtp5Cg
fixUp(size); V!Q1o!J
} Alsr6uLT1
} -%*w&',G
0DFxVH_xN
private int size=0; C/w!Y)nB=
Xt!%W
private int[] queue; `f9I#B
%;Dp~T`0
public int get() { 7Q(5Nlfcz
return queue[1]; 7Q>*]
} )Bq~1M 2
smM*HDK
public void remove() { Y^Olcz
SortUtil.swap(queue,1,size--); w/`I2uYu
fixDown(1); -m.SN>V
} p+;[i%`
file://fixdown QlHxdRK`.
private void fixDown(int k) { =h4* ^NJ
int j; l$_Yl&!q$
while ((j = k << 1) <= size) { 3O:gZRxK
if (j < size %26amp;%26amp; queue[j] j++; N!fTt,
if (queue[k]>queue[j]) file://不用交换 1qw*mV;W)_
break; ]i3 1@O
SortUtil.swap(queue,j,k); 3',|HA /x
k = j; $RYsqX\v
} CqRG !J
} BN?OvQ
private void fixUp(int k) { ?>_[hZ
while (k > 1) { WzC_M>_
int j = k >> 1; IfH*saN7
if (queue[j]>queue[k]) |G5Me
break; %b H1We
SortUtil.swap(queue,j,k); KKz{a{ePY%
k = j; j5,vSh~q;'
} ItZqLUJm
} Fnnk}I}
CCp8,
} #N=!O/Y
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} eN/o}<(e
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SortUtil： q@i,$R
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package org.rut.util.algorithm; SYPG.O?I
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import org.rut.util.algorithm.support.BubbleSort; 7n-;++a5]
import org.rut.util.algorithm.support.HeapSort; `@acQs;0
import org.rut.util.algorithm.support.ImprovedMergeSort; Qg\OJmv
import org.rut.util.algorithm.support.ImprovedQuickSort; JY+ N+c\
import org.rut.util.algorithm.support.InsertSort; ccUq!1
import org.rut.util.algorithm.support.MergeSort; ?3Ytn+Py
import org.rut.util.algorithm.support.QuickSort; =+T$1
import org.rut.util.algorithm.support.SelectionSort; wz-#kH5?
import org.rut.util.algorithm.support.ShellSort; HbRDa
p/4\O
/** '\$2+*
* @author treeroot 0$-N
* @since 2006-2-2 cMCGaaLU
* @version 1.0 poqcoSL"}
*/ r.5}Q?
public class SortUtil { *LTFDC
public final static int INSERT = 1; &uh|!lD
public final static int BUBBLE = 2; ;E8.,#/a
public final static int SELECTION = 3; <5s51b <
public final static int SHELL = 4; u;fD4CA
public final static int QUICK = 5; *Txt`z[|
public final static int IMPROVED_QUICK = 6; 9Ytf7NpR
public final static int MERGE = 7; Ylc[ghx
public final static int IMPROVED_MERGE = 8; )F\tU
public final static int HEAP = 9; bp06xHMu
ohFUy}y
public static void sort(int[] data) { -I$qe Xy
sort(data, IMPROVED_QUICK); i)Hjmf3
} $nB4Ie!WcR
private static String[] name={ ,;aELhMZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fZqMznF
}; nQ*9|v4
E,]G Ek
private static Sort[] impl=new Sort[]{ 'WEypz
new InsertSort(), ;+%(@C51GE
new BubbleSort(), zCvt"!}RRa
new SelectionSort(), s3+^q
new ShellSort(), .^<4]
new QuickSort(), ]UR@V;JG
new ImprovedQuickSort(), }n+#o!uEf
new MergeSort(), 6]=$c<.&
new ImprovedMergeSort(), ^:.=S`,^
new HeapSort() 35dbDgVz$
}; no*p`a *
T+_pmDDN
public static String toString(int algorithm){ 5",@!1ju
return name[algorithm-1]; 8Bvc#+B
} iWbrX1 I+
[NE:$@
public static void sort(int[] data, int algorithm) { ~kdxJP"
impl[algorithm-1].sort(data); 5]/i[T_
} bk@F/KqL
~bSPtH ]6d
public static interface Sort { W}<'Y@[,
public void sort(int[] data); lg)jc3
} 1gEeZ\B-&
1m*fkM#
public static void swap(int[] data, int i, int j) { dqU bJc]
int temp = data; ?mdgY1
data = data[j]; a#iJXI
data[j] = temp; 'eNcQJh
} iez@j
} -^m]Tb<u