[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; (.cT<(TB
} UTz;Sw?~hw
int i1=l; U8dwb
int i2=mid+1; S70ERRk
for(int cur=l;cur<=r;cur++){ Co M8
if(i1==mid+1) l40$}!!<
data[cur]=temp[i2++]; 6eBQ9XV
else if(i2>r) LLMkv!%D
data[cur]=temp[i1++]; ETIf x)B-
else if(temp[i1] data[cur]=temp[i1++]; X$aMf&x
else )c*~Y=f
data[cur]=temp[i2++]; <5.{+!BM
} ` mi!"pmw
} m-:k]9I
Oj2[(7mO/
} (8{Z@
(]JJ?aAF
改进后的归并排序: T'XRl@
OCd[P1Y]
package org.rut.util.algorithm.support; SaNx;xgi
@1pdyKK
import org.rut.util.algorithm.SortUtil; B3D4fYQ
J]%P fWV
/** ^a]:GPc
* @author treeroot nL$tXm-x
* @since 2006-2-2 Au {`oxD
* @version 1.0 >TE&myZ?*
*/ biJU r^n
public class ImprovedMergeSort implements SortUtil.Sort { %ug`dZ/
t :_7O7
private static final int THRESHOLD = 10; wNPZ[V:
|(/"IS]
/* F'K{=
* (non-Javadoc) *6h.#$\
* j6\{j#q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I%ez_VG
*/ Lh+^GQ
public void sort(int[] data) { ]KfHuYjM
int[] temp=new int[data.length]; ,Ya&M@^Z
mergeSort(data,temp,0,data.length-1); pD]Ry" ZG
} q*T+8O
cc>h=%s`
private void mergeSort(int[] data, int[] temp, int l, int r) { +5Mx0s(5
int i, j, k; ELm#
int mid = (l + r) / 2; hZpFI?lqc\
if (l == r) []@Mk
return; zIL.R#|D=
if ((mid - l) >= THRESHOLD) {3;4=R3
mergeSort(data, temp, l, mid); ScI9.{
else f; 22viE
insertSort(data, l, mid - l + 1); ~6OdPD
if ((r - mid) > THRESHOLD) NENbr$,G
mergeSort(data, temp, mid + 1, r); {\%x{
else .VI2V-Q
insertSort(data, mid + 1, r - mid); Un<~P@T%
'HC4Q{b`
for (i = l; i <= mid; i++) { 4fN<pG,
temp = data; jQc0_F\
} ?O_;{(F_
for (j = 1; j <= r - mid; j++) { H1X6f7`
temp[r - j + 1] = data[j + mid]; Y-Z.AA,
} l-mUc1.S
int a = temp[l]; q3;HfZ
int b = temp[r]; h7*m+/O
for (i = l, j = r, k = l; k <= r; k++) { |HL1.;1
if (a < b) { IE|$>q0Z
data[k] = temp[i++]; ]6%| L
a = temp; 3A+d8fwi
} else { uv@4/M`
data[k] = temp[j--]; OaEOk57%de
b = temp[j]; D3_,2
} Q=+KnE=h
} SDot0`s>
} Uzc`,iV$
rod{77
/** 8U-}%D<a
* @param data 1|zo-'y
* @param l {6n B83BB
* @param i X&K1>dgWP
*/ $FD0MrB_+
private void insertSort(int[] data, int start, int len) { N[AX29
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); . [C~a
} IQR?n}ce
} wc ^z9y
} S3 &L
} TEY%OIzU+
M*t{?o/t;
堆排序： d/"e3S1
7VR+EV
package org.rut.util.algorithm.support; .~Td/o7
A$ s4Q0Mf
import org.rut.util.algorithm.SortUtil; vmL0H)q
ba ,2.|
/** dfk=%lZYd9
* @author treeroot :sJVklK
* @since 2006-2-2 kMUjSa~\
* @version 1.0 65g\WB+/
*/ Zj$U_
public class HeapSort implements SortUtil.Sort{ S25&UwUw
c$>Tfa'H
/* (non-Javadoc) Z5+qb
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) './s'!Lj
*/ `|Ih"EZ
public void sort(int[] data) { Lg-Sxz}P!
MaxHeap h=new MaxHeap(); ]81P<Y(7
h.init(data); 'b%S3)}
for(int i=0;i h.remove(); h\jwXMi,tj
System.arraycopy(h.queue,1,data,0,data.length); z`'{l{
} @'dtlY5;
I>:M1Yc0
private static class MaxHeap{ f~t*8rG~m
WOquG
void init(int[] data){ RHeql*`
this.queue=new int[data.length+1]; bz,C%HFA
for(int i=0;i queue[++size]=data; !}<Y^="
fixUp(size); FL-sXg
} ,|}Pof=]xk
} &_G^=Nc,H
A=Dzd/CUO
private int size=0; HPT$)NeNc
GXf"a3
private int[] queue; Eufw1vDa
u0\?aeg`
public int get() { R{u/r%
return queue[1]; }fdo Aid~
} L-vy,[9)[*
)nQA) uz
public void remove() { d/N&bTg:
SortUtil.swap(queue,1,size--); h9$Ov`N(%
fixDown(1); 3y<;fdS7
} 6f(K'v
file://fixdown fn]f$n*`
private void fixDown(int k) { yKgA"NaM
int j; %,1bh
while ((j = k << 1) <= size) { =UT*1-yhR
if (j < size %26amp;%26amp; queue[j] j++; d%8hWlffz
if (queue[k]>queue[j]) file://不用交换 CB:G4VqOT
break; ?u/RQ 1
SortUtil.swap(queue,j,k); ZXlW_CGO
k = j; }y;s(4
} 4:WN-[xX
} 3%p^>D\
private void fixUp(int k) { 4At{(fwW
while (k > 1) { OLg=kF[[
int j = k >> 1; @FU9!
if (queue[j]>queue[k]) K`Vi5hR~c
break; x(ue |UG
SortUtil.swap(queue,j,k); /J9|.];%r
k = j; unY+/p $
} /-4rcC
} 2guWWFS
2M1}`H\
} "Y-_83
Yi:@>A<#
} B"P-h^oiV
%a$ l%8j&
SortUtil： m:_'r"o
K*NCIIDh
package org.rut.util.algorithm; s"gNHp.oF
mW-4
import org.rut.util.algorithm.support.BubbleSort; AXFQd@#
import org.rut.util.algorithm.support.HeapSort; ^~XsHmcQ
import org.rut.util.algorithm.support.ImprovedMergeSort; }V:ZGP#!'
import org.rut.util.algorithm.support.ImprovedQuickSort; SoC3)iqv/
import org.rut.util.algorithm.support.InsertSort; `\Z7It?aDs
import org.rut.util.algorithm.support.MergeSort; 7|bzopLJk
import org.rut.util.algorithm.support.QuickSort; <#HQU<
import org.rut.util.algorithm.support.SelectionSort; ROqz$yY
import org.rut.util.algorithm.support.ShellSort; VI_8r5o
}04EM
/** G6@XRib3
* @author treeroot :rR)rj'
* @since 2006-2-2 j%%& G$Tfu
* @version 1.0 I5Vp%mCY
*/ T8'm{[C
public class SortUtil { &![3{G"+>l
public final static int INSERT = 1; ^V,?n@c!
public final static int BUBBLE = 2; JiH^N!
public final static int SELECTION = 3; p^J=*jm)x
public final static int SHELL = 4; ~FCkr&Ky3
public final static int QUICK = 5; \7]0vG
public final static int IMPROVED_QUICK = 6; 0;6eSmF
public final static int MERGE = 7; l4:B(
public final static int IMPROVED_MERGE = 8; /h6K"w=='!
public final static int HEAP = 9; U4s)3jDw
cCa+UTxaJ
public static void sort(int[] data) { *,az`U
sort(data, IMPROVED_QUICK); b5!D('w>]
} .! 'SG6 q
private static String[] name={ CmP_9M?ce
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q^trKw~XNy
}; rHngYcjR
oyC5M+shP9
private static Sort[] impl=new Sort[]{ !pTi.3
new InsertSort(), mZ_643|
new BubbleSort(), 6 rp(<D/_
new SelectionSort(), F .hA.E
new ShellSort(), v=8sj{g3,3
new QuickSort(), HAKB@h)
new ImprovedQuickSort(), dQ#$(<v[
new MergeSort(), j;TXZ`|(
new ImprovedMergeSort(), yX7P5c.
new HeapSort() kD*r@s]=
}; .30eO_msK
1buVV]*~
public static String toString(int algorithm){ tXXnHEz
return name[algorithm-1]; -}x( MZ
} GUDz>(
! mb<z^>5
public static void sort(int[] data, int algorithm) { ^jYE4gHM
impl[algorithm-1].sort(data); SB x<-^
} ks19e>'5Q
)JA9bR <
public static interface Sort { y?Cq{(
public void sort(int[] data); 2r^G;,{
} ;X;q8J^_K_
"rVf{
public static void swap(int[] data, int i, int j) { X:2)C-l?
int temp = data; &9OnN<mT1
data = data[j]; _<^mi!Y
data[j] = temp; JfLoGl;pm
} T;C0t9Yew
} ]L6[vJHx