[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; /yn1MW[.
} y6Xfddd61
int i1=l; M9*7r\hqYV
int i2=mid+1; 8^ju=
for(int cur=l;cur<=r;cur++){ w#k'RuOw5
if(i1==mid+1) ~$w-I\Q!
data[cur]=temp[i2++]; R(@7$
else if(i2>r) 4VLrl8$K
data[cur]=temp[i1++]; cF_`m
else if(temp[i1] data[cur]=temp[i1++]; 5{qFKo"g@,
else [r_,BH\nu
data[cur]=temp[i2++]; m *8[I
} Lu}oC2
} @u3K.}i:g
|0n h
} /HH5Mn*
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改进后的归并排序: T#?KY
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package org.rut.util.algorithm.support; cX"[#Em#
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import org.rut.util.algorithm.SortUtil; Zeyhr\T
nU%rSASu
/** [(}f3W&
* @author treeroot 6grJoim|
* @since 2006-2-2 tUv@4<~,/
* @version 1.0 @P+k7"f
*/ @m!~![
public class ImprovedMergeSort implements SortUtil.Sort { [~?LOH
A- IpE
private static final int THRESHOLD = 10; Jis{k$4
P"W$ZX
/* ;^xlDN
* (non-Javadoc) HH+NNSRO
* {'G@-+K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h;f5@#F
*/ |//cA2@.
public void sort(int[] data) { K)$.0S9d
int[] temp=new int[data.length]; T=:&W3
mergeSort(data,temp,0,data.length-1); g"]%5Ow1
} YnuC<y &p
K,%H*1YKK
private void mergeSort(int[] data, int[] temp, int l, int r) { vp &jSfQ^
int i, j, k; L+bO X
int mid = (l + r) / 2; +SkD/"5ng
if (l == r) &$jg *Kr
return; r|cl6s!P
if ((mid - l) >= THRESHOLD) U#1T HO`
mergeSort(data, temp, l, mid); `zRgP#
else VkhZt7]K}B
insertSort(data, l, mid - l + 1); u*{hXR-"
if ((r - mid) > THRESHOLD) <M=U @
mergeSort(data, temp, mid + 1, r); cH'*J/
else F%bv vw*(
insertSort(data, mid + 1, r - mid); 8dq{.B?
016l$K4
for (i = l; i <= mid; i++) { /L'm@8
temp = data; ;r>?V2,tm
} $4'I3{$
for (j = 1; j <= r - mid; j++) { -N^}1^gA
temp[r - j + 1] = data[j + mid]; -% PUY(
} =A9>Ej/
int a = temp[l]; ~-lIOQ.v
int b = temp[r]; Tz+2g&+
for (i = l, j = r, k = l; k <= r; k++) { $&nF1HBI4
if (a < b) { =#n05*^
data[k] = temp[i++]; e"hm|'
a = temp; Yi&;4vC
} else { V\%;S
data[k] = temp[j--]; IV;juFw}G
b = temp[j]; :ZL;wtT
} \`jFy[(Pa'
} #nX0xV5=
} <<LmO-92
n_AW0i.
/** !Zgb|e8<
* @param data HD?z
* @param l {o+aEMhM
* @param i ~ygiKsD6b
*/ |OF<=GGO+
private void insertSort(int[] data, int start, int len) { `r'q(M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "v/^nH
} )FT~gl%
} u9"b,].b
} 'IFbD["r
} je9[S_Z:Y
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堆排序： )NRY9\H
Kl{2^q>
package org.rut.util.algorithm.support; ,AGK O,w
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import org.rut.util.algorithm.SortUtil; 5|NM]8^^0[
l Vo](#W
/** ]o$Kh$~5
* @author treeroot 5dT-{c%w4
* @since 2006-2-2 LTS3[=AB
* @version 1.0 ] $$ciFM
*/ -WE pBt7*
public class HeapSort implements SortUtil.Sort{ m@.4Wrv
#l2wF>0
/* (non-Javadoc) f,d @*E
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) - 4'yp
*/ !w]!\H
public void sort(int[] data) { y1cAw
MaxHeap h=new MaxHeap(); 6=Kl[U0Y
h.init(data); f?#:@ zcL
for(int i=0;i h.remove(); s#&jE GBug
System.arraycopy(h.queue,1,data,0,data.length); kR7IZo"q
} x%k4Lm
Ig"Krz
private static class MaxHeap{ 5oGnPF
]x:>~0/L
void init(int[] data){ VhT4c+Zs
this.queue=new int[data.length+1]; k`Ab*M$@Xs
for(int i=0;i queue[++size]=data; 8xDSeXh;
fixUp(size); {F6hx9?
} TGdD7n&Ehh
} (NOAHV0H
(-(,~E
private int size=0; 6|X
DGO_fR5L
private int[] queue; p+snBaAo}
J;+tQ8,AP
public int get() { Ec8Y}C,{7<
return queue[1]; cInzwdh7
} BqvOi~l
)_NQ*m
public void remove() { D*Siy;
SortUtil.swap(queue,1,size--); -kq=W_
fixDown(1); o ]2=5;)
} ,COSpq]6
file://fixdown (:,N?bg
private void fixDown(int k) { @{@x2'-A
int j; Itr yiU9
while ((j = k << 1) <= size) { aN).G1
if (j < size %26amp;%26amp; queue[j] j++; L;Nz\sJ
if (queue[k]>queue[j]) file://不用交换 #?}k0Y
break; yf*MG&}
SortUtil.swap(queue,j,k); ~)tIO<$U
k = j; Pw1V1v&>q
} 7 '2E-#^
} 0h^upB#p
private void fixUp(int k) { w?Nvm?_]
while (k > 1) { qXt2m
int j = k >> 1; cm%QV?
if (queue[j]>queue[k]) 1Nx%uz
break; 9j49#wG0"B
SortUtil.swap(queue,j,k); $f_;>f2N
k = j; *hF5cM[
} McNj TD
} p W:[Q\rSj
Q pz01x
} 8~ .r/!wfy
>sm< < gVb
} &w*.S@ ;
6f?5/hq
SortUtil： !a[ voUS
'dQ2"x?4
package org.rut.util.algorithm; |bi"J;y
I/|)?
import org.rut.util.algorithm.support.BubbleSort; ~kS~v
import org.rut.util.algorithm.support.HeapSort; r5(OH3
import org.rut.util.algorithm.support.ImprovedMergeSort; `dMOBYV
import org.rut.util.algorithm.support.ImprovedQuickSort; g`y >)N/
import org.rut.util.algorithm.support.InsertSort; }LM^>M%
import org.rut.util.algorithm.support.MergeSort; KAjKv_6=g
import org.rut.util.algorithm.support.QuickSort; m qPWCFP
import org.rut.util.algorithm.support.SelectionSort; 1MRt_*N4
import org.rut.util.algorithm.support.ShellSort; 16keCG\
r}WV"/]p
/** 8niQG']
* @author treeroot }z,4IHNn
* @since 2006-2-2 wDem }uO
* @version 1.0 -F4CHpua
*/ O#H`/z
public class SortUtil { rMTtPuc2
public final static int INSERT = 1; Cl\Vk
public final static int BUBBLE = 2; -tF5$pb'
public final static int SELECTION = 3; #`:60#l
public final static int SHELL = 4; r1}OlVbK
public final static int QUICK = 5; @=K> uyB
public final static int IMPROVED_QUICK = 6; xRv1zHZ
public final static int MERGE = 7; {p9y{$
public final static int IMPROVED_MERGE = 8; LdU, 32
public final static int HEAP = 9; wQ2'%T|t
y 8];MTl
public static void sort(int[] data) { )qn =
sort(data, IMPROVED_QUICK); NrgN{6u;
} }qmZ
private static String[] name={ ?)",}XL6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7_E+y$i=
}; 6^mO<nB
HMgZ&v
private static Sort[] impl=new Sort[]{ ?qHW"0Tjn
new InsertSort(), gD _tBv
new BubbleSort(), lk}R#n$
new SelectionSort(), 'iXjt MX
new ShellSort(), .<u<!fL2
new QuickSort(), _66zXfM<
new ImprovedQuickSort(), =k2+VI
new MergeSort(), zIH[ :
new ImprovedMergeSort(), :?@d\c'
new HeapSort() y:iE'SRRK6
}; VpWax]'
$Z+N*w~8
public static String toString(int algorithm){ {u9(qd;;
return name[algorithm-1]; fF_1ZKx+#!
} kkyn>Wxv
2~2
public static void sort(int[] data, int algorithm) { @gE +T37x2
impl[algorithm-1].sort(data); ok-sm~bp
} n4>
G&/}P$
public static interface Sort { Mq[;:
public void sort(int[] data); =XQ3sk6U
} !g=,O6
UmiW_JB
public static void swap(int[] data, int i, int j) { HpDU:m
int temp = data; ?5$\8gZ
data = data[j]; /w_Sc{
data[j] = temp; x\3 ` W
} [jDO8n/
} =H>rX 2k