[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; /E(319u_
} T~=r*4
int i1=l; RXo!K iQO
int i2=mid+1; 5X8GR5P
for(int cur=l;cur<=r;cur++){ H);O.m
if(i1==mid+1) ~3,>TV
data[cur]=temp[i2++]; rUg<(/c
else if(i2>r) v$H=~m
data[cur]=temp[i1++]; @jXdQY%{
else if(temp[i1] data[cur]=temp[i1++]; /&PRw<}>_o
else '{e9Vh<x
data[cur]=temp[i2++]; ape\zZCV
} r8]y1 Om<
} !|\$|m<n
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} 2h_XfY'3pX
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改进后的归并排序: QJeL&mf
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package org.rut.util.algorithm.support; lfle7;
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import org.rut.util.algorithm.SortUtil; 9FGe(t<
]$4DhB
/** &oU) ,H
* @author treeroot bSG}I|
* @since 2006-2-2 /Qa'\X,f3
* @version 1.0 D90.z"N\i9
*/ <%_7%
public class ImprovedMergeSort implements SortUtil.Sort { /b|V=j}W
&3@{?K
private static final int THRESHOLD = 10; "UNWbsn6Qr
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/* !Dc|g~km\
* (non-Javadoc) ~g#$'dS
* l0 Eh?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FZk=-.Hk
*/ Qru iQ/t
public void sort(int[] data) { `FJ2 ?
int[] temp=new int[data.length]; Rhfx
mergeSort(data,temp,0,data.length-1); 5]c\{G
} )o=ipm[
vzXfJP
private void mergeSort(int[] data, int[] temp, int l, int r) { k}0Y&cT!rU
int i, j, k; \#yKCA';
int mid = (l + r) / 2; x>ZnQ6x~m]
if (l == r) 2#i*'.
return; y;GwMi$KI
if ((mid - l) >= THRESHOLD) uV|%idC
mergeSort(data, temp, l, mid); [iO*t,3@h
else &E/0jxM1
insertSort(data, l, mid - l + 1); cFV)zFu
if ((r - mid) > THRESHOLD) ]Yw/}GKB
mergeSort(data, temp, mid + 1, r); ZUA%ZkX=F
else [& d"Z2gK
insertSort(data, mid + 1, r - mid); q{c/TRp7
!gyEw1Re7
for (i = l; i <= mid; i++) { i&di}x
temp = data; 3g{T+c*
} aAi"
for (j = 1; j <= r - mid; j++) { .='hYe.
temp[r - j + 1] = data[j + mid]; +YX*.dW
} j,Vir"-)
int a = temp[l]; =[ +)T[
int b = temp[r]; <@](uWu
for (i = l, j = r, k = l; k <= r; k++) { OL2 b
if (a < b) { yGs:3KI
data[k] = temp[i++]; ~%D=\iE
a = temp; o3ZqPk]al
} else { aCZ7G %Y
data[k] = temp[j--]; "J=A(w5
b = temp[j]; Y+ Qm.
} +\ZaVi
} >hFg,5 _l3
} dBeZx1Dy
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/** aj|gt
* @param data b]oPx8*'
* @param l M~O$,dof
* @param i P.>5`^
*/ )*m#RqLQ8
private void insertSort(int[] data, int start, int len) { |9;MP&68
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 92";?Xk
} V.?Oly
} '7ps_pz
} ][[\!og
} pN-c9n4#j
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堆排序： 6?uo6 I
^;DbIo\6H
package org.rut.util.algorithm.support; 5n#@,V.O/
2`V[Nb
import org.rut.util.algorithm.SortUtil; M!Wjfq ^~
[}1+=Ub
/** -6yFE- X/
* @author treeroot wS%j!|xhlV
* @since 2006-2-2 O@)D%*;v
* @version 1.0 eI:;l];G9
*/ w"/RI#7.
public class HeapSort implements SortUtil.Sort{ .0ExHcr
;z3w#fNMv
/* (non-Javadoc) T0F!0O `
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9i`sSi8
*/ # ZcFxB6)
public void sort(int[] data) { 7TaHE
MaxHeap h=new MaxHeap(); i3usZ{_r
h.init(data); ]fb3>HOTJ
for(int i=0;i h.remove(); <7X6ULQ
System.arraycopy(h.queue,1,data,0,data.length); {klyVb
} fd&=\~1_$
W%&'EJ)62
private static class MaxHeap{ X{-[ E^X
f83Tl~
void init(int[] data){ 15L0B5(3
this.queue=new int[data.length+1]; o9 g0fC
for(int i=0;i queue[++size]=data; P{{U
fixUp(size); ^cz;UQX~}
} 4Px
} ?=^M(TA;
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private int size=0; pQ/ bIuq
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private int[] queue; 1}>uY
l;'#!hC)
public int get() { TexSUtx@$
return queue[1]; Ad'b{C%
} cJQ&#u
;xMieqz
public void remove() { @b,&b6V
SortUtil.swap(queue,1,size--); 'D1Sm&M2%e
fixDown(1); $Afw]F$
} WymBjDos:
file://fixdown ^+)q@{\8Y
private void fixDown(int k) { Wgr`)D
int j; BMlu>,
while ((j = k << 1) <= size) { 1;$8=j2
if (j < size %26amp;%26amp; queue[j] j++; UC{Tmf
if (queue[k]>queue[j]) file://不用交换 klqN9d9k
break; Y\pRk6,
SortUtil.swap(queue,j,k); g\O&gNq<)-
k = j; <>9zXbI
} 1E'/!|
} hr)CxsPoRQ
private void fixUp(int k) { #vnJJ#uI|>
while (k > 1) { #FL\9RXy
int j = k >> 1; Pu-/*Fx
if (queue[j]>queue[k]) nL[zXl
break; X|3l*FL
SortUtil.swap(queue,j,k); P O{1u%P
k = j; `4N{x.N
} |loo^!I
} Edi`x5"l
c'8a)j$$+
} *gxo!F}
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} Ad@Odx=o*R
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SortUtil： ag \d4y6
on=I*?+R
package org.rut.util.algorithm; -<0PBl
B,Gt6cUq
import org.rut.util.algorithm.support.BubbleSort; h)746T )
import org.rut.util.algorithm.support.HeapSort; yXdJ5Me(T
import org.rut.util.algorithm.support.ImprovedMergeSort; 4\6-sL?rW
import org.rut.util.algorithm.support.ImprovedQuickSort; sivd@7r\Fa
import org.rut.util.algorithm.support.InsertSort; 7?O~3
import org.rut.util.algorithm.support.MergeSort; ~il{6Z+#n
import org.rut.util.algorithm.support.QuickSort; \f AL:mJ
import org.rut.util.algorithm.support.SelectionSort; uDZ$'a
import org.rut.util.algorithm.support.ShellSort; x`#|8
%%w/;o!c
/** ?<#2raH-
* @author treeroot >nnjLrI
* @since 2006-2-2 {MaFv
* @version 1.0 5}/TB_W7j
*/ ~GWn>
public class SortUtil { =c>w
public final static int INSERT = 1; X@[)jWs
public final static int BUBBLE = 2; P=j89-e
public final static int SELECTION = 3; %!>~2=Q2*
public final static int SHELL = 4; B:pIzCP
public final static int QUICK = 5; +[DL]e]@U
public final static int IMPROVED_QUICK = 6; j9=QOq
public final static int MERGE = 7; A?q9(n|A"
public final static int IMPROVED_MERGE = 8; ,;2x.We
public final static int HEAP = 9; 4ZZ/R?AiK
"^~>aVuXf
public static void sort(int[] data) { u{o!j7
sort(data, IMPROVED_QUICK); \9S&j(I
} a^*@j:[
private static String[] name={ .Fy f4^0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q6?}/p
}; Ikkv <uY
3']yjj(gHr
private static Sort[] impl=new Sort[]{ gGiLw5o,
new InsertSort(), `+!GoXI
new BubbleSort(), ?}N@bsl08w
new SelectionSort(), 4gTDHQP
new ShellSort(), H nRd
new QuickSort(), %mhnd):
new ImprovedQuickSort(), kW#{[,7r
new MergeSort(), amL8yb
new ImprovedMergeSort(), &DMKZMj<Q*
new HeapSort() !~{AF|2f
}; O^D$ ~ ]
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public static String toString(int algorithm){ S >PTD@
return name[algorithm-1]; axl!zu*
} g2=5IU<
tNskB`541
public static void sort(int[] data, int algorithm) { Z=sCYLm
impl[algorithm-1].sort(data); -ISI!EU$
} U$J l5[`F^
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public static interface Sort { *g^U=t
public void sort(int[] data); `}s$cgEG
} 6#+&_#9
Xj;nh?\u
public static void swap(int[] data, int i, int j) { xzFV]
int temp = data; #Nt?4T<
data = data[j]; -WIT0F4o;
data[j] = temp; &v+8RY^F=
} eUYd0L!
} 'vT XR_D