[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; W6Y]N/v3>
} JtER_(.
int i1=l; |\pbir
int i2=mid+1; /Rl6g9}
for(int cur=l;cur<=r;cur++){ 3Z1CWzq(
if(i1==mid+1) p5G?N(l
data[cur]=temp[i2++]; S]+:{9d
else if(i2>r) K6R.@BMN
data[cur]=temp[i1++]; TYW&!sm
else if(temp[i1] data[cur]=temp[i1++]; wmTb97o
else .9wk@C(Eh_
data[cur]=temp[i2++]; F6z%VWU
} ~@}Bi@*
} eio4k-
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} rW$[DdFA5{
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改进后的归并排序: \-g)T}g,I
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package org.rut.util.algorithm.support; <7~'; K
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import org.rut.util.algorithm.SortUtil; WPQ fhr#|
a|X a3E
/** ui?
* @author treeroot 4t=G
* @since 2006-2-2 PUUwv_
* @version 1.0 B6={&7U2
*/ uA<n
public class ImprovedMergeSort implements SortUtil.Sort { ez|)ph7
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private static final int THRESHOLD = 10; ~sh`r{0
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/* }~L.qG
* (non-Javadoc) {tWf
* qi^7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ~A\GT$
*/ 9iQq.$A.
public void sort(int[] data) { F%RRd/'
int[] temp=new int[data.length]; |!4K!_y
mergeSort(data,temp,0,data.length-1); o4Om}]Ti
} c24dSNJg,
\2h!aRWR
private void mergeSort(int[] data, int[] temp, int l, int r) { F1yqxWHeo
int i, j, k; a^I\ /&aw'
int mid = (l + r) / 2; aht[4(XH5
if (l == r) cz8T
return; {N+$Q'
if ((mid - l) >= THRESHOLD) GB=X5<;
mergeSort(data, temp, l, mid); /V'A%2Cl=T
else HMNLa*CL'
insertSort(data, l, mid - l + 1); 2fL;-\!y(
if ((r - mid) > THRESHOLD) H*PSR
mergeSort(data, temp, mid + 1, r); Y^wW2-,m
else 8)_XJ"9)G
insertSort(data, mid + 1, r - mid); bE !GJZ
_z|65H
for (i = l; i <= mid; i++) { JkbQyn
temp = data; Yo6*C
} |IzPgC
for (j = 1; j <= r - mid; j++) { [<@.eH$hU/
temp[r - j + 1] = data[j + mid]; + R~'7*EI
} &OH={Au
int a = temp[l]; Fww :$^_ k
int b = temp[r]; W:pIPDx1=!
for (i = l, j = r, k = l; k <= r; k++) { pOIJH =#
if (a < b) { cQ R]le%(
data[k] = temp[i++]; k5'Vy8q
a = temp; s;ls qQk
} else { o6.^*%kM'
data[k] = temp[j--]; :74y!
b = temp[j]; u0`S5?
} T4Pgbop
} W')Yg5T
} VY7[)
wfLaRP
/** 0x@6^%^\
* @param data *Q "wwpl?
* @param l [1Qo#w1
* @param i +nFu|qM}
*/ <Zmg#
private void insertSort(int[] data, int start, int len) { lR6@ xJd:@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qm/22:&v5
} V_.5b&@
} Q+{xZ'o"Z
} AP?R"%
} &w_j/nW^'
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堆排序： *0Skd
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package org.rut.util.algorithm.support; G[uK-U
MP Y[X[
import org.rut.util.algorithm.SortUtil; <L8'!q}
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/** @@Kp67Iv
* @author treeroot 8V`WO6*
* @since 2006-2-2 6d<r= C=
* @version 1.0 aC8} d
*/ C)ERUH2i
public class HeapSort implements SortUtil.Sort{ YYBDRR"
(c=6yV@
/* (non-Javadoc) 2DrP"iGq5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z]_wjYn Z
*/ 7x|9n
public void sort(int[] data) { ?N*>*"
MaxHeap h=new MaxHeap(); ?]_$Dcmx
h.init(data); iL-(O;n
for(int i=0;i h.remove(); vc;$-v$&
System.arraycopy(h.queue,1,data,0,data.length); KQ!8ks]
} <KL,G};0pm
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private static class MaxHeap{ spH7 /5}
U]H#MiC!
void init(int[] data){ ) j#`r/
this.queue=new int[data.length+1]; FpmM63$VN[
for(int i=0;i queue[++size]=data; 2*;~S44
fixUp(size); *v^Jb/E315
} 3nO]Ge"w'n
} P64PPbP
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private int size=0; un mJbY;t
O:;w3u7;u
private int[] queue; c_$=-Khk
-P$PAg5"2
public int get() { 'uSn}hm
return queue[1]; )l C)@H}
} O`IQ(,yef
UNu#(nP
public void remove() { dVtG/0
SortUtil.swap(queue,1,size--); 6_GhO@lOG
fixDown(1); *5C7d*'
} g[' ^L+hd
file://fixdown qZ}^;)a^
private void fixDown(int k) { vxBgGl
int j; C!<Ou6}!b
while ((j = k << 1) <= size) { H(ARw'M
if (j < size %26amp;%26amp; queue[j] j++; )4e.k$X^
if (queue[k]>queue[j]) file://不用交换 _YhES-Ff
break; \h/H#jZJ
SortUtil.swap(queue,j,k); q_[o"wq/
k = j; ]nn98y+
} !Iy_UfW
} V(I8=rVH
private void fixUp(int k) { $Vg>I>i
while (k > 1) { EU/C@B2*Dl
int j = k >> 1; C_}]`[
if (queue[j]>queue[k]) {H>gtpVy
break; Uiw2oi&_
SortUtil.swap(queue,j,k); HAdg/3Hw
k = j; ?=sDM& '
} l ^0@86
} @Md/Q~>
hR?{3d#x2
} Mq156TL
hn GZ=
} e'NJnPO
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SortUtil： AlaW=leTe
5{X<y#vAC0
package org.rut.util.algorithm; {UI+$/v#
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import org.rut.util.algorithm.support.BubbleSort; xef% d G.
import org.rut.util.algorithm.support.HeapSort; g wRZ%.Cn
import org.rut.util.algorithm.support.ImprovedMergeSort; |tH4:%Q'
import org.rut.util.algorithm.support.ImprovedQuickSort; Q~ w|#
import org.rut.util.algorithm.support.InsertSort; 0 1rK8jX
import org.rut.util.algorithm.support.MergeSort; W' VslZG
import org.rut.util.algorithm.support.QuickSort; tCH!my_
import org.rut.util.algorithm.support.SelectionSort; L ca}J&x]^
import org.rut.util.algorithm.support.ShellSort; /hR&8 `\\
W:2( .?
/** $t[FH&c(
* @author treeroot 9s q
* @since 2006-2-2 z2~til
* @version 1.0 /{g>nzP
*/ kS);xA8s]
public class SortUtil { L~OvY
public final static int INSERT = 1; b{&)6M)zo
public final static int BUBBLE = 2; M'O <h
public final static int SELECTION = 3; ?dg[:1R}
public final static int SHELL = 4; Se}c[|8
public final static int QUICK = 5; Czu9o;xr
public final static int IMPROVED_QUICK = 6; 194)QeoFw
public final static int MERGE = 7; CY5Z{qiX
public final static int IMPROVED_MERGE = 8; )mT<MkP
public final static int HEAP = 9; S9y}
xJ]\+ 50
public static void sort(int[] data) { U?Zq6_M&
sort(data, IMPROVED_QUICK); }o(-=lF
} PJ%C N(0
private static String[] name={ 4xje$/_d
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *w\W/Y
}; $Ds2>G4c
*L^,|
private static Sort[] impl=new Sort[]{ 77f9(~ZnT
new InsertSort(), N=}A Z{$
new BubbleSort(), 83_h J
new SelectionSort(), 013x8!i
new ShellSort(), [}=B8#Jl-C
new QuickSort(), e X|m
new ImprovedQuickSort(), AQvudx)@"
new MergeSort(), 6A-|[(NS
new ImprovedMergeSort(), /W<;Z;zk
new HeapSort() jV1.Yz(`
}; |u<7?)mp
wlqksG[B
public static String toString(int algorithm){ ^6V[=!& H
return name[algorithm-1]; yNBfUj -L
} .Yn_*L+4*
db7B^|Di
public static void sort(int[] data, int algorithm) { #q=Efn'
impl[algorithm-1].sort(data); 583|blL
} *.t7G
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public static interface Sort { <\^8fn
public void sort(int[] data); f2`2,?
} VY4yS*y
_]H&,</
public static void swap(int[] data, int i, int j) { yvB.&<]No
int temp = data; Z@!+v19^
data = data[j]; e*NnVys
data[j] = temp; /nA{#HY
} YNF k
} <PH#[dH