[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; d;+[i
} Zx$ol;Yd
int i1=l; W#Qmv^StZ
int i2=mid+1; _aPh(qprc
for(int cur=l;cur<=r;cur++){ :>81BuMvg
if(i1==mid+1) cGwf!hA
data[cur]=temp[i2++]; p)~lL
else if(i2>r) efY8M2
data[cur]=temp[i1++]; 1+7GUSIb
else if(temp[i1] data[cur]=temp[i1++]; ,2]X}&{i
else O$ HBO
data[cur]=temp[i2++]; z7-k`(l4
} @WKzX41'
} 99EXo+g
[0UGuj
} eVl'\aUd
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改进后的归并排序: |D.O6?v@
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package org.rut.util.algorithm.support; Oi} T2I
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import org.rut.util.algorithm.SortUtil; nPUqMn'
k'X;ruQ:tF
/** >Ng)k]G
* @author treeroot Y\=FLO9
* @since 2006-2-2 a1j.fA
* @version 1.0 NS C/@._
*/ CD0VfA>Z
public class ImprovedMergeSort implements SortUtil.Sort { .O0O-VD+a
LC0d/hM
private static final int THRESHOLD = 10; 7}_!
z* <y5
/* z5]bia,
* (non-Javadoc) aTzDew
* 7'NS9|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ay{t254/
*/ _#_ E^!
public void sort(int[] data) { A*tKF&U5
int[] temp=new int[data.length]; (3dPLp:K
mergeSort(data,temp,0,data.length-1); G9g6.8*&
} q/1Or;iK
n,O5".aa<
private void mergeSort(int[] data, int[] temp, int l, int r) { !q"CV
int i, j, k; P;]F=m+*V
int mid = (l + r) / 2; 4l8BQz}sb
if (l == r) Jg$xO@.
return; $ex!!rqN|
if ((mid - l) >= THRESHOLD) B!lw>rUMQ
mergeSort(data, temp, l, mid); fe,CY5B{
else oWT0WS
insertSort(data, l, mid - l + 1); GR9F^Y)K{
if ((r - mid) > THRESHOLD) 0_)\e
mergeSort(data, temp, mid + 1, r); kSrzIq<xre
else QX/`s3N
insertSort(data, mid + 1, r - mid); Y"U&3e,
3J{'|3x
for (i = l; i <= mid; i++) { 'McVaPav
temp = data; T!AQJ:;1
} A#{*A
for (j = 1; j <= r - mid; j++) { o!N@W
temp[r - j + 1] = data[j + mid]; L T!X|O.
} p^3d1H3
int a = temp[l]; 5^i ^?
int b = temp[r]; P^r8JhDJ
for (i = l, j = r, k = l; k <= r; k++) { l K%Hb=
if (a < b) { a$-ax[:\sm
data[k] = temp[i++]; _t7A'`Dh]
a = temp; W@LR!EW)
} else { \wP$"Z}j
data[k] = temp[j--]; B;$5*3D+
b = temp[j]; ny0`~bl{p
} rA7S1)Kq
} q Sah_N
} xC]/i(+bA
aeIR}'H|
/** x3 <Lx^;
* @param data G#>nOB
* @param l ME"/%59r
* @param i F ry5v?22
*/ sP#5l @
private void insertSort(int[] data, int start, int len) { *HUqW}_r
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); B:SRHd{*Wu
} *&km5@*
} Sr0mA M
} 0!T $Ef
} :/08}!_:
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堆排序： *%.*vPJ
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package org.rut.util.algorithm.support; _{8boDX#
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import org.rut.util.algorithm.SortUtil; L!RLw4
r0,}f\
/** j yE+?4w;
* @author treeroot ]v@,>!Wn
* @since 2006-2-2 CEiGjo^
* @version 1.0 f3O'lc3
*/ }OZfsYPz}T
public class HeapSort implements SortUtil.Sort{ d p].FS
=6hf'lP
/* (non-Javadoc) /$KW$NH4z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) pbNVj~#6
*/ 2P*O^-zRp
public void sort(int[] data) { }#1g;
MaxHeap h=new MaxHeap(); i@6 kIC
h.init(data); uQ}kq7gd
for(int i=0;i h.remove(); : s35{K
System.arraycopy(h.queue,1,data,0,data.length); /T0|<r!c
} 5 X rn]
DuaOi1Gw
private static class MaxHeap{ ,k4 (b
H'0S;A+Y6
void init(int[] data){ !nVuvsbv
this.queue=new int[data.length+1]; }j QwP3eY
for(int i=0;i queue[++size]=data; QHeUpJ/^
fixUp(size); ?:,j9:m?
} "Y6f.rB
} V_:/#G]jeG
&F)lvtt|
private int size=0; *@< jJP4
jw H)x
private int[] queue; p("do1:
(,k=mF
public int get() { ?V+=uTCq
return queue[1]; UaB!,vs3st
} aO{k-44y
'k hJZ:
public void remove() { #Uo 9BM
SortUtil.swap(queue,1,size--); <?!#QA
fixDown(1); 3:r;(IaX
} dCBJV
file://fixdown JyV"jL
private void fixDown(int k) { 1]"b.[P>
int j; |1EM )zh6
while ((j = k << 1) <= size) { d]<tFx>CQW
if (j < size %26amp;%26amp; queue[j] j++; uKplPze?
if (queue[k]>queue[j]) file://不用交换 DY%E&Vd:h
break; }Q*8QV
SortUtil.swap(queue,j,k); :%{8lanO
k = j; ;G?_^ 0
} Z^b1i`v
} R lv|DED$
private void fixUp(int k) { )7f:hg
while (k > 1) { Wh7$')@
int j = k >> 1; :jA~zHO
if (queue[j]>queue[k]) eD(#zfP/+
break; 0@>3fR
SortUtil.swap(queue,j,k); e*pYlm
k = j; G$CI~0Se:
} ~jM!8]=
} 6q@VkzF
AHdh]pfH
} z[De?8=)
qh/}/Sl;
} H6i;MQ
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SortUtil： jfsbvak
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package org.rut.util.algorithm; |H4f&&Wd
Uf<IXx&;
import org.rut.util.algorithm.support.BubbleSort; uOQl;}Lk5
import org.rut.util.algorithm.support.HeapSort; =l1O9/\9
import org.rut.util.algorithm.support.ImprovedMergeSort; O"f|gc)GLz
import org.rut.util.algorithm.support.ImprovedQuickSort; ?V(h@T
import org.rut.util.algorithm.support.InsertSort; $s!2D"wl n
import org.rut.util.algorithm.support.MergeSort; >l(|c9OWM
import org.rut.util.algorithm.support.QuickSort; NEcE-7aT
import org.rut.util.algorithm.support.SelectionSort; zn/b\X/
import org.rut.util.algorithm.support.ShellSort; U-lN-/=l6
h|XLL|:
/** (-esUOB.
* @author treeroot ]B9Ut&mF;
* @since 2006-2-2 U$AV"F&!&}
* @version 1.0 "78BApjWT6
*/ rWxQ;bb#
public class SortUtil { 75RQ\_zDu
public final static int INSERT = 1; #~:@H&f790
public final static int BUBBLE = 2; o :_'R5
public final static int SELECTION = 3; d/&~IR
public final static int SHELL = 4; SMbhJ}\O
public final static int QUICK = 5; ^.(i!BG'
public final static int IMPROVED_QUICK = 6; ^y3snuLtE
public final static int MERGE = 7; +4m~D`fqt[
public final static int IMPROVED_MERGE = 8; W,p?}KiO T
public final static int HEAP = 9; VVm8bl.q
pXq5|,aC
public static void sort(int[] data) { ,|Lf6k
sort(data, IMPROVED_QUICK); yZqX[U
} |-.r9;-b
private static String[] name={ E:S (v
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ewp&QH4
}; Nt P=m @
-`} d@x
private static Sort[] impl=new Sort[]{ Kf'oXCs
new InsertSort(), Yb Dz{m
new BubbleSort(), Zh3hCxXa
new SelectionSort(), }pL#C
new ShellSort(), a^.5cJ$]
new QuickSort(), D?}K|z LQ
new ImprovedQuickSort(), EmubpUS;
new MergeSort(), H\@@iK=
new ImprovedMergeSort(), iBy &#^
new HeapSort() @#KZ2^
}; A"R5Fd%6pc
Q:sw*7"F
public static String toString(int algorithm){ Qr$Ay3#k
return name[algorithm-1]; \KT}T
} ?s5hckhh
_!?iiO
public static void sort(int[] data, int algorithm) { ucgp=bye
impl[algorithm-1].sort(data); <R@w0b>
} v{*#
DW.vu%j^[
public static interface Sort { {G(N vf,K]
public void sort(int[] data); LFT)_DG7(
} j SXVLyz
y%=t((.Z
public static void swap(int[] data, int i, int j) { Cz]NSG5
int temp = data; 2'5%EQW;0y
data = data[j]; 8sGaq [
data[j] = temp; *:hHlH* t1
} 5p`.RWls
} D_)n\(3