[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; UP-eKK'z
} 5pCicwea#
int i1=l; <=4$.2ym
int i2=mid+1; uY]';OtG
for(int cur=l;cur<=r;cur++){ 7=P)`@
if(i1==mid+1) M|(VM=~
data[cur]=temp[i2++]; X+4Uh I
else if(i2>r) 9@*pC@I)
data[cur]=temp[i1++]; h4hAzFQ.s
else if(temp[i1] data[cur]=temp[i1++]; ?"yjgt7+y
else :zHSy&i`
data[cur]=temp[i2++]; q"VmuQ
} yKML{N1D
} o?baiOkH
\.i7(J]
} :3D8rqi:
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改进后的归并排序: :Awwt0
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package org.rut.util.algorithm.support; .I`>F/Sjr
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import org.rut.util.algorithm.SortUtil; %J*1F
Q9bnOvKe|
/** xA3_W
* @author treeroot n!4}Hwz!
* @since 2006-2-2 n{?Du
* @version 1.0 V%R]jbHZ#
*/ #Pd9i5~N
public class ImprovedMergeSort implements SortUtil.Sort { ([8*Py|
`oxBIn*BD
private static final int THRESHOLD = 10; v}DNeIh~
vPnS`&
/* MXA?rjd0
* (non-Javadoc) y" =?l
* 4@{;z4*`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D$FTnY
*/ H:G``Vq;0m
public void sort(int[] data) { D <iG*I
int[] temp=new int[data.length]; (%^C}`|EA
mergeSort(data,temp,0,data.length-1); nAP*w6m0j
} K_MEd1l
W? G4>zA
private void mergeSort(int[] data, int[] temp, int l, int r) { WL+EpNKSf
int i, j, k; 4 $k{,
int mid = (l + r) / 2; E2zL-ft.
if (l == r) 4rhHvp
return; @WazSL;N
if ((mid - l) >= THRESHOLD) (Aw@}!
mergeSort(data, temp, l, mid); \;XJ$~>
else k)+{Y v*
insertSort(data, l, mid - l + 1); }hn?4ny
if ((r - mid) > THRESHOLD) /[/L%;a'p
mergeSort(data, temp, mid + 1, r); #'/rFT4{v
else =ls+vH40&
insertSort(data, mid + 1, r - mid); 1feVFRx'
Sstz_t
for (i = l; i <= mid; i++) { BsA4/Bf
temp = data; -o/Vp>_UOE
} nKE^km
for (j = 1; j <= r - mid; j++) { "/R?XCBZsb
temp[r - j + 1] = data[j + mid]; %qV:h#
} Ea4zC|;
int a = temp[l]; ]+G .S-a
int b = temp[r]; UR^r>
for (i = l, j = r, k = l; k <= r; k++) { DlzL(p@r
if (a < b) { X}GX6qAdt
data[k] = temp[i++]; rw)!>j+&A
a = temp; =bp'5h8_
} else { /%g@ ;
data[k] = temp[j--]; ~vYFQKrb
b = temp[j]; "C}<umJ'
} LDegJer-v
} o"qxR'V
} O=K0KOj
\>\ERVEd
/** z&9ljQ iF
* @param data s58dHnj5+
* @param l hrX/,D -c
* @param i j~bNH~3
*/ $\m:}\%p
private void insertSort(int[] data, int start, int len) { h8WM4 PK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); X!V#:2JY
} GYtgw9 "Y
} )-I/ej^
} ]R~hzo
} V1,p<>9
wtbN@g0
堆排序： rrC\4#H[??
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package org.rut.util.algorithm.support; w!`e!}
`j{q
import org.rut.util.algorithm.SortUtil; .8'c c8
zn/>t-Bc
/** # ,H!<X;SS
* @author treeroot r5Q#GY>
* @since 2006-2-2 a,fcKe&B
* @version 1.0 `j3 OFC{7E
*/ |a)zuC
public class HeapSort implements SortUtil.Sort{ # a4OtRiI
F(j;|okf;
/* (non-Javadoc) C\{ KB@C\*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) |A68+(3u
*/ 0OlT^
public void sort(int[] data) { ]fDb|s48
MaxHeap h=new MaxHeap(); _|;d D
h.init(data); Jr'a_(~
for(int i=0;i h.remove(); +b_[JP2
System.arraycopy(h.queue,1,data,0,data.length); X6}W]
} sMLXn]m
jc3Q3Th/zn
private static class MaxHeap{ pcIS}+L
}x#e.}hf&
void init(int[] data){ JS03BItt
this.queue=new int[data.length+1]; XlXt,
for(int i=0;i queue[++size]=data; pq_U?_5Z'r
fixUp(size); <^$ppwk$
} ES^JRX
} u[SqZftmO
e)s l
private int size=0; b*tb$F
Js:U1q
private int[] queue; ;I@\}!%H
/)RH-_63
public int get() { eKuF7Oo
return queue[1]; Sz|kXk6&9
} p5"pQeS
%Cj_z
public void remove() { `'3&tAy
SortUtil.swap(queue,1,size--); w)&4i$Lk6
fixDown(1); eU)QoVt
} Txl|F\nK`
file://fixdown ;Y8>?
private void fixDown(int k) { #I MaN%
int j; v2r|)c,h
while ((j = k << 1) <= size) { wQ/.3V[
if (j < size %26amp;%26amp; queue[j] j++; z&c}
if (queue[k]>queue[j]) file://不用交换 Qe!3ae`Z
break; 3_9CREZCl
SortUtil.swap(queue,j,k); FzSL[S4i
k = j; Oc,HnyV+
} y5KeUMcu
} LRaO}-<b
private void fixUp(int k) { {2Ew^Li
while (k > 1) { : Wtpg
int j = k >> 1; MGK?FJn_?
if (queue[j]>queue[k]) %TAS4hnu%
break; E`xpZ>$mPx
SortUtil.swap(queue,j,k); 7K&Uu3m
k = j; @@-TW`G7
} ]ZP!y
} FSz<R*2
m8 _yorz
} M/lC&F(
@+~>utr
} y$di_)&g
eB_r.R{
SortUtil： +*`kJ)uP
K;Hgq4
package org.rut.util.algorithm; 1R yE8DdP
gH,Pz
import org.rut.util.algorithm.support.BubbleSort; h 2JmRO
import org.rut.util.algorithm.support.HeapSort; xCWS
import org.rut.util.algorithm.support.ImprovedMergeSort; 4i&Rd1#0dI
import org.rut.util.algorithm.support.ImprovedQuickSort; +Q"~2_q5/;
import org.rut.util.algorithm.support.InsertSort; $;$vcV9*
import org.rut.util.algorithm.support.MergeSort; jAcKSx$}y"
import org.rut.util.algorithm.support.QuickSort; Q`.q,T8I
import org.rut.util.algorithm.support.SelectionSort; r|]YS6
import org.rut.util.algorithm.support.ShellSort; av5a2r0W1
>z/.8!#Q
/** !%t2ZQJq
* @author treeroot EbX!;z
* @since 2006-2-2 j+dQI_']x
* @version 1.0 ;; {K##^l
*/ N(yd<Mw
public class SortUtil { ,uNJz-B8
public final static int INSERT = 1; dIh+h|:
public final static int BUBBLE = 2; g]N'6La
public final static int SELECTION = 3; IsJx5GO
public final static int SHELL = 4; PJ?C[+&
public final static int QUICK = 5; Z]tQmV8e
public final static int IMPROVED_QUICK = 6; 79}jK"Gc
public final static int MERGE = 7; MwQ4&z#wh
public final static int IMPROVED_MERGE = 8; O^6anUV0
public final static int HEAP = 9; D@.qdRc3
@^ti*`
public static void sort(int[] data) { -I6t ^$HA
sort(data, IMPROVED_QUICK); Og@{6>
} $`%Om WW{
private static String[] name={ NOkgG0Z
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dKD:mU",M
}; %,<Ki]F
."O%pL]!/b
private static Sort[] impl=new Sort[]{ h6?Z
new InsertSort(), D:IG;Rsc
new BubbleSort(), M=&,+#z<V
new SelectionSort(), /J!:_Nq
new ShellSort(), @x743}Y\
new QuickSort(), nN-S5?X#
new ImprovedQuickSort(), S-3hLw&?
new MergeSort(), RjgJIVm(
new ImprovedMergeSort(), :?y Ma$
new HeapSort() +?Cy8Ev?
}; YAeF*vP
IoK/2Gp
public static String toString(int algorithm){ <-N2<sl
return name[algorithm-1]; 0b n%L~KU
} GP %hf{
|#SZdXg
public static void sort(int[] data, int algorithm) { v@M^ukk'}
impl[algorithm-1].sort(data); /K1cP>oE
} aHYISjZ]>
-/Wf iE
public static interface Sort { nSBhz
public void sort(int[] data); h9}*_qc&kV
} mW{>
W\w#}kY
public static void swap(int[] data, int i, int j) { ,p(&G_
int temp = data; Ks6\lpr
data = data[j]; %.$7-+:7A
data[j] = temp; t&[<Dl/L
} >nih:5J,ja
} 9^8OIv?m8