[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; *h3iAcM8
} K5BL4N
int i1=l; #d-zH:uq
int i2=mid+1; &vn2u bauS
for(int cur=l;cur<=r;cur++){ +`g&hO\W
if(i1==mid+1) '=#fELMW
data[cur]=temp[i2++]; U"+W)rUd
else if(i2>r) G :k'm^k
data[cur]=temp[i1++]; UOl*wvy
else if(temp[i1] data[cur]=temp[i1++]; n_9Ex&?e
else 72yJv=G
data[cur]=temp[i2++]; A~<!@`NjB
} [(5.?
} `&OX|mL^w
} e+`Kxy
} 0`-b57lF&
5Pn.c!
改进后的归并排序: %DXBl:!Y`
A8Fe@$<#8
package org.rut.util.algorithm.support; IM/xBP
xdM'v{N#m
import org.rut.util.algorithm.SortUtil; LbRQjwc]W
u;c WIRG
/** i$PO#}
* @author treeroot =W:=}ODD
* @since 2006-2-2 ?6`B;_m
* @version 1.0 kROIVO1|`
*/ cy;i1#1rO
public class ImprovedMergeSort implements SortUtil.Sort { s8>y&b.
CEc(2q+%i
private static final int THRESHOLD = 10; ]77f`<q<}!
[WG\wj.
/* &0-oi Y
* (non-Javadoc) JcmJq fR
* Dm5 Uy^F}
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wL="p) TO.
*/ t&J A1|q
public void sort(int[] data) { QDJ "X
int[] temp=new int[data.length]; QSY>8P
mergeSort(data,temp,0,data.length-1); $/IFSB9
} +,LWyvc'
%N fpEo
private void mergeSort(int[] data, int[] temp, int l, int r) { /:(A9b-B
int i, j, k; .'<K$:8@|
int mid = (l + r) / 2; H${LF.8
if (l == r) *K;)~@n
return; :=ek~s.UV
if ((mid - l) >= THRESHOLD) 51Y%"v t
mergeSort(data, temp, l, mid); XC^*z[#4{
else ;(Ug]U%3_
insertSort(data, l, mid - l + 1); L8Tm8)
if ((r - mid) > THRESHOLD) lMvOYv
mergeSort(data, temp, mid + 1, r); PDuBf&/e
else % _E?3
insertSort(data, mid + 1, r - mid); ~o"=4q`>
8{2
for (i = l; i <= mid; i++) { o9"?z
temp = data; U{M3QOF
} *S:~U
for (j = 1; j <= r - mid; j++) { 89(qU
temp[r - j + 1] = data[j + mid]; pQ:^ ziwa3
} 6` TwP\!$/
int a = temp[l]; $$1t4=Pz
int b = temp[r]; "}*D,[C5e
for (i = l, j = r, k = l; k <= r; k++) { wb?k
if (a < b) { 2WFZ6
data[k] = temp[i++]; $a*7Q~4
a = temp; 7N[".V]c
} else { NOXP}M
data[k] = temp[j--]; zH}3J}
b = temp[j]; A%W]XEa<
} U,EoCAm>
} 2RX]~}
} 3U{ mC}F
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/** 6Qt(Yu*s
* @param data EOrui:.B)
* @param l 06f%{mAZS
* @param i aX;>XL4
*/ NknS:r&2
private void insertSort(int[] data, int start, int len) { B=a+cT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ) bI.K[0^
} )/;+aDk
} 1~L;S
} fOHbgnL>
} &`l\Q\_[@
B&6NjLV
堆排序： g&xj(SMj-$
@9HRGxJ=}
package org.rut.util.algorithm.support; : "|/
fc*>ky.v
import org.rut.util.algorithm.SortUtil; h2Nt@
jL\j$'KC
/** 9,INyEyAL
* @author treeroot B\RAX#
* @since 2006-2-2 Zpkd8@g@
* @version 1.0 iv~R4;;)
*/ Nt@|l7Xl*
public class HeapSort implements SortUtil.Sort{ Za{O9Qc?D|
/f1]U LmC:
/* (non-Javadoc) nD BWm`kN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t[`LG)
*/ Gg'!(]v
public void sort(int[] data) { ]i.N'O<p
MaxHeap h=new MaxHeap(); QX<n^W
h.init(data); A,<5W }
for(int i=0;i h.remove(); {wz)^A sy
System.arraycopy(h.queue,1,data,0,data.length); ,^?g\&f(
} qhxMO[f
@^UgdD,BS,
private static class MaxHeap{ mcd{:/^?
wG[nwt0L
void init(int[] data){ f%o[eW#
this.queue=new int[data.length+1]; 1DB{"8ov
for(int i=0;i queue[++size]=data; V ,p~,rC
fixUp(size); ^Qx?)(@
} U3a2wK
} '/u|32
gD6S%O
private int size=0; aKriO
ih0a#PB8
private int[] queue; =Q(J!f
!~vK[G(R
public int get() { PG63{
return queue[1]; i;1pw_K
} @FN|=?8%
/Yy)=~t{
public void remove() { p [C 9g
SortUtil.swap(queue,1,size--); 0 MK}
fixDown(1); 5VTVx1P[8
} aG }oI!
file://fixdown /(JG\Ut
private void fixDown(int k) { -n9&W
int j; ^\ x'4!W
while ((j = k << 1) <= size) { fY&TI}Y
if (j < size %26amp;%26amp; queue[j] j++; T&'Jc
if (queue[k]>queue[j]) file://不用交换 ?A|JKOst]
break; wPM>-F
SortUtil.swap(queue,j,k); IQO|)53)
k = j; >g{&Qx`&
} Ih:Q}V#6
} dzOco)y
private void fixUp(int k) { 3LETzsJ
while (k > 1) { gvR]"h
int j = k >> 1; 6NX#=A
if (queue[j]>queue[k]) H}kZ;8
break; (s;W>,~q
SortUtil.swap(queue,j,k); U~][ ph
k = j; Wm6qy6HR
} ~Q_7HJ=^$
} $.Tn\4z&
c},pu[nL
} 5FR#CQ
T<0r,
} We{@0K/O
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SortUtil： 0vjCSU-X
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package org.rut.util.algorithm; j$q5m 24L
~wDXjn"U&
import org.rut.util.algorithm.support.BubbleSort; I0zx'x)F
import org.rut.util.algorithm.support.HeapSort; qqw P4ceG
import org.rut.util.algorithm.support.ImprovedMergeSort; ,kJ7c;:i
import org.rut.util.algorithm.support.ImprovedQuickSort; >O\+9T@
import org.rut.util.algorithm.support.InsertSort; +u Iq]tqe
import org.rut.util.algorithm.support.MergeSort; _dm0*T ?
import org.rut.util.algorithm.support.QuickSort; &qS%~h%2
import org.rut.util.algorithm.support.SelectionSort; u$R5Q{H_
import org.rut.util.algorithm.support.ShellSort; 5c]:/9&
1@p,
/** $b|LZE\bU.
* @author treeroot + kMj|()>\
* @since 2006-2-2 :u,.(INB
* @version 1.0 C})Dvh
*/ Vq+7 /+2"
public class SortUtil { R)66qRf
public final static int INSERT = 1; ^Ye(b7Gd
public final static int BUBBLE = 2; d/9YtG%q
public final static int SELECTION = 3; m&gd<rt/
public final static int SHELL = 4; 3l<qcKKc
public final static int QUICK = 5; ?\8aT"o
public final static int IMPROVED_QUICK = 6; kaCN^yQ
public final static int MERGE = 7; Ge`7`D>L
public final static int IMPROVED_MERGE = 8; jlP*RX
public final static int HEAP = 9; Sh!c]r>\Q
L4Jm8sy{
public static void sort(int[] data) { l48$8Mgrr
sort(data, IMPROVED_QUICK); 'UsR/h5T
} `TJhH<z"%
private static String[] name={ ^nPy(Q0
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O(W"QY
}; Nb$0pc1J<
UAF$bR
private static Sort[] impl=new Sort[]{ #S?^?3d
new InsertSort(), %8n<#0v-|4
new BubbleSort(), u*@R`,Y
new SelectionSort(), ! :]_-DX
new ShellSort(), #$BFTlm|
new QuickSort(), Cw(e7K7&
new ImprovedQuickSort(), 72Bc0Wg
new MergeSort(), et+lL"&
new ImprovedMergeSort(), B9NUafK=
new HeapSort() X6 BIZ
}; IRQtA ZV$
i)e6U(H
public static String toString(int algorithm){ ,CyX*k8o
return name[algorithm-1]; &'/"=lK
} (O J/u)W^
O6Py
public static void sort(int[] data, int algorithm) { 5&s6(?,Eu
impl[algorithm-1].sort(data); ;9j ]P56
} {'4#{zmp
f DXK<v)
public static interface Sort { 73X*|g[O
public void sort(int[] data); ^}~Q(ji7
} XDCm
7N 0Bj!
public static void swap(int[] data, int i, int j) { Hes!uy
int temp = data; o>M^&)Xs
data = data[j]; e^eJ!~0
data[j] = temp; t}R!i-D|HB
} 8j>V?'Szk
} R7Qj<,