[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; S{K0.<,E
} \`w4|T
int i1=l; u(!&:A9JFd
int i2=mid+1; oW;6h.
for(int cur=l;cur<=r;cur++){ @WKzX41'
if(i1==mid+1) 99EXo+g
data[cur]=temp[i2++]; [0UGuj
else if(i2>r) eVl'\aUd
data[cur]=temp[i1++]; J/6`oh?,Q
else if(temp[i1] data[cur]=temp[i1++]; |D.O6?v@
else ph2$oO 6,
data[cur]=temp[i2++]; Oi} T2I
} &Sp -w?kM
} nPUqMn'
k'X;ruQ:tF
} >Ng)k]G
dz[ bm<T7
改进后的归并排序: #pHs@uvO
}!i`0p
package org.rut.util.algorithm.support; NS C/@._
sFDG)
import org.rut.util.algorithm.SortUtil; W~Z<1[
a83g\c5
/** <*EZ@XoN>
* @author treeroot LC0d/hM
* @since 2006-2-2 |*mL1#bB
* @version 1.0 Xes|[*Y!V
*/ |7@O($b
public class ImprovedMergeSort implements SortUtil.Sort { AddeaB5<
ejXMKPE;
private static final int THRESHOLD = 10; *U#m+@\0
~3RC>8*Qw
/* ]Zf6Yw.Y
* (non-Javadoc) mNYl@+:psj
* 0L^u2HZYL
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {k(eNr,
*/ $t-n'Qh^2
public void sort(int[] data) { jtm?z c
int[] temp=new int[data.length]; N:"C+a(
mergeSort(data,temp,0,data.length-1); `8\Ja$ =
} /VHi>
0qFH s
private void mergeSort(int[] data, int[] temp, int l, int r) { MEiRj]t
int i, j, k; |3? 8)z\n
int mid = (l + r) / 2; B%\gkl
if (l == r) 5HS~op2n/
return; q*)+K9LRk
if ((mid - l) >= THRESHOLD) rbqo"g`
mergeSort(data, temp, l, mid); ,LOQDIyn
else c6Q(Ygc
insertSort(data, l, mid - l + 1); Ejq#~Zhr!
if ((r - mid) > THRESHOLD) kVS?RHR
mergeSort(data, temp, mid + 1, r); ]+H?@*b`
else X%9*O[6{
insertSort(data, mid + 1, r - mid); 4FMAz^
Brd,Eg
for (i = l; i <= mid; i++) { Vga-@
temp = data; 2yo cu!4l
} :1)DqoAJ
for (j = 1; j <= r - mid; j++) { O''y>N9
temp[r - j + 1] = data[j + mid]; o0z67(N&g
} W2wpcc
int a = temp[l]; 4O{Avt7C
int b = temp[r]; nkeI60
for (i = l, j = r, k = l; k <= r; k++) { B ?%L
if (a < b) { 'PWQnt_U
data[k] = temp[i++]; s4T}Bsr
a = temp; =sOo:s
} else { &GWkq>
data[k] = temp[j--]; 'b"TH^\
b = temp[j]; #Tp]^ n
} 1MA@JA:T
} xU9@$am
} H]#Rg`~n
R UTnc
/** qI3NkVA'C
* @param data G6`J1Uk
* @param l V7t!?xOL
* @param i gd6Dm4q(
*/ l!IKUzt)7
private void insertSort(int[] data, int start, int len) { 99iUOw c
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hh.Q\qhubB
} #-cTc&$O;
} *9gD*AnM,
} gY9\o#)<
} +'03>!V
K6pR8z*?
堆排序： D>wZ0p b-
R21~Q:b!
package org.rut.util.algorithm.support; `Xo4q3
Bo\D.a(T
import org.rut.util.algorithm.SortUtil; ~S(^T9R
mgkyC5)d
/** pvXcLR)L+3
* @author treeroot ^i_Iqph=
* @since 2006-2-2 {8NwFN.
* @version 1.0 eXy"^xp^
*/ XrN- 2HTV
public class HeapSort implements SortUtil.Sort{ B/eaqJ
_|,{ ^m|d
/* (non-Javadoc) =K$,E4*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4Nmea-!*
*/ (v#pj8aE
public void sort(int[] data) { 9XV^z*E(J
MaxHeap h=new MaxHeap(); IjZ@U%g@;
h.init(data); !Ua&0s%
for(int i=0;i h.remove(); 0\a8}b||
System.arraycopy(h.queue,1,data,0,data.length); [N|xzMe
} {0's~U+@
g*-2* \
private static class MaxHeap{ E8-53"m
YL5>V$i
void init(int[] data){ y@apJ;_R-
this.queue=new int[data.length+1]; v:d9o.h
for(int i=0;i queue[++size]=data; Q~ 0Dfow?
fixUp(size); 68x}w Ae
} MTmO>V&O
} L0&S0HG
^,7=X8Su
private int size=0; k90B!kg
y(8d?]4:_
private int[] queue; &:!ij
?q%b*Ek
public int get() { C+l?k2
return queue[1]; D@vMAW
} #@_1fE
^Rmoz1d
public void remove() { SFO&=P:U
SortUtil.swap(queue,1,size--); D<nxr~pQ
fixDown(1); !A[S6-18%-
} c#\-%h
file://fixdown T"W9YpZ
private void fixDown(int k) { %ejeyc
int j; 3Xdn62[&
while ((j = k << 1) <= size) { R [9w
if (j < size %26amp;%26amp; queue[j] j++; exphe+b
if (queue[k]>queue[j]) file://不用交换 K}2Npo FS
break; H`D f
SortUtil.swap(queue,j,k); ?~)Ak`=
k = j; 0>Fqx{!heq
} Vj!WaN_
} 0$2={s4ze
private void fixUp(int k) { K/Jk[29"\
while (k > 1) { KO-a; [/
int j = k >> 1; MFTC6L+T
if (queue[j]>queue[k]) qeMv Vf
break; od,tfLw4
SortUtil.swap(queue,j,k); 3'@&c?Fye
k = j; $Q4=37H+
} nW&$~d
} rv?!y8\
2nx9#B*/T
} vPsq<l}
X,Zd=
} 0P9Wy!f7
(C~dkR?
SortUtil： yqBa_XPV8
l"L+e!B~
package org.rut.util.algorithm; KnFQ)sX^
73pC
import org.rut.util.algorithm.support.BubbleSort; yfq>,
import org.rut.util.algorithm.support.HeapSort; yjeL9:jH[
import org.rut.util.algorithm.support.ImprovedMergeSort; q u:To7
import org.rut.util.algorithm.support.ImprovedQuickSort; %Qd3BZ
import org.rut.util.algorithm.support.InsertSort; ZeTL$E[E}
import org.rut.util.algorithm.support.MergeSort; FF@`+T
import org.rut.util.algorithm.support.QuickSort; (j=DD6fC
import org.rut.util.algorithm.support.SelectionSort; hfh.eL
import org.rut.util.algorithm.support.ShellSort; x3;jWg~'
s7|3zqi
/** R2Yl)2 D
* @author treeroot ni0LQuBp
* @since 2006-2-2 "GLYyC
* @version 1.0 2H>aC wfX
*/ {jhcZ"#>\
public class SortUtil { &oc_a1R
public final static int INSERT = 1; 5U;nhDmM
public final static int BUBBLE = 2; (uT^Nn9L=
public final static int SELECTION = 3; 4ac1m,Jlt
public final static int SHELL = 4; FpC~1Nau
public final static int QUICK = 5; k-]xSKG
public final static int IMPROVED_QUICK = 6; {9'hOi50
public final static int MERGE = 7; :f]!O@.~
public final static int IMPROVED_MERGE = 8; i^/DiWdyf
public final static int HEAP = 9; UU"d_~pp
:o<N!*pT
public static void sort(int[] data) { dh?S[|='
sort(data, IMPROVED_QUICK); h=Oh9zsz8
} Fu mn9
private static String[] name={ &]*|6cR$E
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #Wq#beBb
}; 2| $k`I,
QglYU
private static Sort[] impl=new Sort[]{ F*X%N_n
new InsertSort(), F\Y,JUn[G
new BubbleSort(), 5{HtJ?sKc5
new SelectionSort(), Z3Gm
new ShellSort(), ,?fN#gc :
new QuickSort(), j]#wrm
new ImprovedQuickSort(), T[m ~6
new MergeSort(), "u,sRbL
new ImprovedMergeSort(), `M,Nd'5&|
new HeapSort() Gk{W:866
}; G u6[{u
ujow?$&
public static String toString(int algorithm){ v<%]XHN
return name[algorithm-1]; z?I+u*rF6
} Plb}dID"
CN-4-
public static void sort(int[] data, int algorithm) { vs+We*8H
impl[algorithm-1].sort(data); 4VC/-.At
} `~0P[>|+
Th_Q owk
public static interface Sort { 4Fh&V{`W
public void sort(int[] data); vP-3j
} 3.B4(9:>,
qjJ{+Rz2
public static void swap(int[] data, int i, int j) { a4Ls^
int temp = data; (21']x
data = data[j]; ip<15;Z
data[j] = temp; E`Q;DlXv>
} H\ {E%7^h-
} -*rHB&e