[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; sJr5t?
} {gy+3
int i1=l; ;\)=f6N
int i2=mid+1; 3-wD^4)O,
for(int cur=l;cur<=r;cur++){ %EbiMo ]3B
if(i1==mid+1) d}0qJoH4
data[cur]=temp[i2++]; &y_? rH
else if(i2>r) W5DbFSgB
data[cur]=temp[i1++]; ]= x 1`j
else if(temp[i1] data[cur]=temp[i1++]; Aa(<L$e!`
else CUmH,`hu
data[cur]=temp[i2++]; !)H*r|*[
} %|Hp Bs#'
} ~\_T5/I%
.{rbw9
} r:.uBc&_
\gKdDS
改进后的归并排序: $@[)nvV\
=q CF%~
package org.rut.util.algorithm.support; D,W\ gP/h%
hFb fNB3
import org.rut.util.algorithm.SortUtil; Z(!pYhLq
s^C;>
/** c]m! G'L_/
* @author treeroot F$6?t.@J
* @since 2006-2-2 eO4)|tW
* @version 1.0 *=nO
*/ NtZ6$o<Y
public class ImprovedMergeSort implements SortUtil.Sort { ,Q2N[Jwd$
w6,*9(;$Pk
private static final int THRESHOLD = 10; 6&!l'[hU
(.^8^uc7X
/* [ #]jC[
* (non-Javadoc) Sb<\-O14"
* 1MQ/r*(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )bW<8f2
*/ j 2}v}
public void sort(int[] data) { (wL3 +
int[] temp=new int[data.length]; X5E '*W
mergeSort(data,temp,0,data.length-1); i-13~Dk
} !UNNjBBP7
4]BJ0+|mT
private void mergeSort(int[] data, int[] temp, int l, int r) { wc[c N+p
int i, j, k; Qb@eK$wo}
int mid = (l + r) / 2; d^aNR Lv
if (l == r) fPE?hG<x
return; %]jQ48^R
if ((mid - l) >= THRESHOLD) 5#u.pu
mergeSort(data, temp, l, mid); rt.[,m
else ONWO`XD
insertSort(data, l, mid - l + 1); IQ{?_'
if ((r - mid) > THRESHOLD) wznn #j
mergeSort(data, temp, mid + 1, r); nVTM3Cz
else ?'+8[OHiF^
insertSort(data, mid + 1, r - mid); Y\8+}g;KR
1~EO+
for (i = l; i <= mid; i++) { q!2<=:f
temp = data; SQIdJG^:
} 44Qk;8*
for (j = 1; j <= r - mid; j++) { uHrb:X!q
temp[r - j + 1] = data[j + mid]; Kw*~W i
} Ld~4nc$H8
int a = temp[l]; |8;? *s`H
int b = temp[r]; | XLFV
for (i = l, j = r, k = l; k <= r; k++) { .nPL2zO
if (a < b) { 2lJZw@
data[k] = temp[i++]; b6Xi
a = temp; @ay|]w
} else { W^|J/Y48
data[k] = temp[j--]; yjv&4pIc1
b = temp[j]; H oS|f0
} i0i`k^bA
} UGf6i"F
} uf?b%:A
ul$omKI$}
/** %OFj
* @param data Av[Ud *~
* @param l X=#It&m%s
* @param i AA_@\:w^
*/ T8mY#^sW_
private void insertSort(int[] data, int start, int len) { .SBc5KX
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); jRwa0Px(
} mOSCkp{<e
} mc~`
} "$Y(NFb
} z^9E;
VX&WlG`wa
堆排序： l"?]BC~
lkN'uZ
package org.rut.util.algorithm.support; E7gL~4I
tUrNp~ve,
import org.rut.util.algorithm.SortUtil; 79a9L{gso
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/** W`5a:"Vg
* @author treeroot M.t@@wq
* @since 2006-2-2 OU6^+Ta
* @version 1.0 AO^]>/7ed
*/ cL ae=N
public class HeapSort implements SortUtil.Sort{ "s> >V,
"TUPYFK9
/* (non-Javadoc) +!G4tA$g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) mUiOD$rO
*/ S>(z\`1qm
public void sort(int[] data) { {dDq*sLf
MaxHeap h=new MaxHeap(); ([1=>Jw"
h.init(data); # UjEY9"M
for(int i=0;i h.remove(); > Z]P]e
System.arraycopy(h.queue,1,data,0,data.length); qih6me8C
} ]u~Os<
x}_rnf_
private static class MaxHeap{ S'|lU@PCl
6(,ItMbI
void init(int[] data){ /%-o.hT
this.queue=new int[data.length+1]; f>p; siR)
for(int i=0;i queue[++size]=data; o}d2N/T
fixUp(size); QZ#3Bn%B5
} cxL,]27Bu
} vi^z5n
Io2,% !D
private int size=0; )_X;9%L7
PnI)n=(\
private int[] queue; Z4=_k{*
O.]_Ry\OXA
public int get() { hT\p)w
return queue[1]; q$bHO
} Ml'bZLwq
[SKP|`I>I
public void remove() { IvPA|8(
SortUtil.swap(queue,1,size--); MacL3f
fixDown(1); Ar\IZ_Q
} U+:S7z@j?
file://fixdown pHq{S;R2G
private void fixDown(int k) { =c :lS&B
int j; FEge+`{,
while ((j = k << 1) <= size) { J,CJPUf&
if (j < size %26amp;%26amp; queue[j] j++; /+Wb6{lY
if (queue[k]>queue[j]) file://不用交换 Dh*~U:6$g
break; n%7A;l!{
SortUtil.swap(queue,j,k); ?,.HA@T%
k = j; \Mobq
} ---Ks0\V
} aa%Yk"V@
private void fixUp(int k) { U@1#!ZZ6
while (k > 1) { @SX%? mk8G
int j = k >> 1; FcuEeca
if (queue[j]>queue[k]) %:yHMEG]'
break; ;}UIj{sj*
SortUtil.swap(queue,j,k); 3(oZZz
k = j; I8E\'`:<
} T2c_vY
} J"m%q\'
{s9y@c*15.
} : OSmr
Dx9$H++6$X
} | 7t=\
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SortUtil： sa\|"IkD2
UXcH";*9b
package org.rut.util.algorithm; mtiO7w"M\7
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import org.rut.util.algorithm.support.BubbleSort; C*Y :w
import org.rut.util.algorithm.support.HeapSort; Rx@%cuP*
import org.rut.util.algorithm.support.ImprovedMergeSort; xCmI7$uQ#
import org.rut.util.algorithm.support.ImprovedQuickSort; KT]J,b
import org.rut.util.algorithm.support.InsertSort; .3S\Rrv
import org.rut.util.algorithm.support.MergeSort; E@\d<c.
import org.rut.util.algorithm.support.QuickSort; 3Vb=6-|
import org.rut.util.algorithm.support.SelectionSort; a:(: :m
import org.rut.util.algorithm.support.ShellSort; KoxGxHz^Y3
lEVQA*u[
/** A*-]J=:E {
* @author treeroot I8pv:>EhC
* @since 2006-2-2 O?4vC5x
* @version 1.0 mTI\,x%<OC
*/ #NVF\
public class SortUtil { R9|2&pfm(M
public final static int INSERT = 1; c:`` Y:
public final static int BUBBLE = 2; ]iE.fQ?;J
public final static int SELECTION = 3; ,&zjOc_v
public final static int SHELL = 4; 5pKvNLy.t
public final static int QUICK = 5; tehI!->l
public final static int IMPROVED_QUICK = 6; &?5{z\;1"
public final static int MERGE = 7; g~$GE},,
public final static int IMPROVED_MERGE = 8; #sm_.?P
public final static int HEAP = 9; ="'P=Xh!8
Ndug9j\2
public static void sort(int[] data) { nDoiG#N0
sort(data, IMPROVED_QUICK); JtrDZ;^@
} w$U/;C
private static String[] name={ ;ow~vO,x
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Fv7%TK{oe
}; CL@h!h554_
5shu76
private static Sort[] impl=new Sort[]{ 9,EaN{GM
new InsertSort(), HC;I0&v>
new BubbleSort(), 5w [=
new SelectionSort(), N|Cy!E=d
new ShellSort(), L@k;L
new QuickSort(), *|,ykb>
new ImprovedQuickSort(), w;SH>Ax:
new MergeSort(), /Vm}+"BCS
new ImprovedMergeSort(), (Q+:N;
new HeapSort() BHJ'[{U*w
}; sY;gh`4h
l SVW}t
public static String toString(int algorithm){ :?:j$ =nWN
return name[algorithm-1]; ,O&PLr8cJ?
} ^ yukn*L
a+>W
public static void sort(int[] data, int algorithm) { ?:''VM.
impl[algorithm-1].sort(data); cLyuCaH>c
} ]htZ!; 8J
>%p m"+h{
public static interface Sort { 5c}9
public void sort(int[] data); :!iPn%
} >&TnTv?I
4xpWO6Q
public static void swap(int[] data, int i, int j) { z)Q^j>%
int temp = data; kFIB lPV
data = data[j]; ng&EGM
data[j] = temp; QY\wQjwuW
} D>7_P7]y
} l;Wy,?p