[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; 3L5r*fa
} U9hS<}<Ki
int i1=l; OQ&'Dti
int i2=mid+1; TFQ!7'xk)
for(int cur=l;cur<=r;cur++){ /8'S1!zc
if(i1==mid+1) 5 `/< v^
data[cur]=temp[i2++]; iEyeX0nm
else if(i2>r) Cfu=u *u
data[cur]=temp[i1++]; 0%`4px4J
else if(temp[i1] data[cur]=temp[i1++]; :mcYZPX#
else zbkMFD.{y
data[cur]=temp[i2++]; /iaf ^ >
} C~% 1w%nn
} ay )/q5
#U mF-c
} }iB|sl2J
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改进后的归并排序: !D^c3d
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package org.rut.util.algorithm.support; O[@q%&_
pKG<Nvgz&
import org.rut.util.algorithm.SortUtil; (5L-G{4
+kK
/** s@4nWe
* @author treeroot B=f,QU
* @since 2006-2-2 zmuMWT;
* @version 1.0 xGk6n4Gg
*/ o+B:#@9?
public class ImprovedMergeSort implements SortUtil.Sort { #]WqM1u
1 T<+d5[C
private static final int THRESHOLD = 10; I{'f|+1
`_ %S
/* HeGYu?&
* (non-Javadoc) 6?tlU>A2s
* QF2q^[>w6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) CTa#Q,
*/ .wA+S8}S
public void sort(int[] data) { E>LkJSy=
int[] temp=new int[data.length]; 5Z/7kU=I
mergeSort(data,temp,0,data.length-1); T4/fdORS
} w'4AJ Q|;
K BE Ax3
private void mergeSort(int[] data, int[] temp, int l, int r) { B;6]NCxD
int i, j, k; 9LnN$e
int mid = (l + r) / 2; X!hIwiA,t
if (l == r) E(pF:po
return; `>(W"^
if ((mid - l) >= THRESHOLD) )m3Uar
mergeSort(data, temp, l, mid); _n8GWBi
else IA zZ1#/3
insertSort(data, l, mid - l + 1); +gd2|`#
if ((r - mid) > THRESHOLD) ^>x|z.
mergeSort(data, temp, mid + 1, r); qVqRf.-\
else u|#>32kV
insertSort(data, mid + 1, r - mid); 4LcX<BU9
RprKm'b8x`
for (i = l; i <= mid; i++) { 2zSG&",2D
temp = data; o Pci66
} QS.>0i/7l
for (j = 1; j <= r - mid; j++) { C;+(Zp
temp[r - j + 1] = data[j + mid]; @Hb'8F
} fc=Patg
int a = temp[l]; :#E*Y8-
int b = temp[r]; @:0ddb71
for (i = l, j = r, k = l; k <= r; k++) { @!N-RQ&A
if (a < b) { bu7'oB~:V^
data[k] = temp[i++]; 2aZw[7s
a = temp; %_-zWVJ
} else { 9h90huyKF
data[k] = temp[j--]; #m{{a]zm^
b = temp[j]; B5V_e!*5F*
} WF&[HKOy/
} ^efb 5
} O%~jop7#6
_mvxsG
/** v44}%$
* @param data r[(xjn
* @param l Lf([dE1
* @param i @oF$LMD
*/ ]r!>{
private void insertSort(int[] data, int start, int len) { i@5[FC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); HW4.zw
} o;a:Dd
} 6Tw#^;q-
} =\#%j|9N9
} GDhE[of
4D%9Rc0 G
堆排序： '3]p29v{
HjqB^|z
package org.rut.util.algorithm.support; ,B(7\
_\PNr.D8
import org.rut.util.algorithm.SortUtil; o}Odw;
-4w=s|#.\
/** PjT=$]
* @author treeroot 1(zsOeX
* @since 2006-2-2 H7Uli]e3
* @version 1.0 p^nL&yIW,%
*/ E9|eu\
public class HeapSort implements SortUtil.Sort{ 4h!f/aF'
,/&'m13b/L
/* (non-Javadoc) l.\re"Q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ECdvX0*a
*/ f'Iz G.R
public void sort(int[] data) { $&s=68
MaxHeap h=new MaxHeap(); w;}@'GgL
h.init(data); `~eX55W
for(int i=0;i h.remove(); b `2|I {
System.arraycopy(h.queue,1,data,0,data.length); ;4M><OS!
} a07@C
tt?58dm|
private static class MaxHeap{ -7/s]9o'
O1 .w,U
void init(int[] data){ <^b7cOFQ
this.queue=new int[data.length+1]; G2LK]
for(int i=0;i queue[++size]=data; <H1`
fixUp(size); n,eJ$2!J
} YSJy`
} F/m^?{==~*
L%v^s4@
private int size=0; ,uw132<b
ONNpiK-
private int[] queue; ,:~0F^z
6)oLus
public int get() { ;Sd\VR
return queue[1]; lZ8CY
} #po5_dE\*
lf>*Y.!@me
public void remove() { =.]l*6WV
SortUtil.swap(queue,1,size--); yc2/~a_Gx
fixDown(1); RsU3Gi_Zdz
} kt[:@Nda9
file://fixdown wxm:7$4C
private void fixDown(int k) { tx"sH]n
int j; BQcE9~H
while ((j = k << 1) <= size) { JGC=(;
if (j < size %26amp;%26amp; queue[j] j++; *`j-i
if (queue[k]>queue[j]) file://不用交换 X1IeSMAe
break; Eh-n
SortUtil.swap(queue,j,k); +,o0-L1D
k = j; <9=9b_z
} {QBB^px
} x}U8zt)yD3
private void fixUp(int k) { ze_{=Cv&Y
while (k > 1) { Wv__ wZ
int j = k >> 1; `28};B>
if (queue[j]>queue[k]) %}86D[PF
break; M :3u@06a
SortUtil.swap(queue,j,k); ] 2DH;
k = j; ZYf2XI(_"
} U.AjYez
} pA{ 5V9
*Nyev]8
} ^qCkt1C-M
LG~S8u
} JKer//ng4
!R*-R.%
SortUtil： Q^p|Ldj
h/x0]@M&
package org.rut.util.algorithm; $^&ig
g}laG8
import org.rut.util.algorithm.support.BubbleSort; r]W
import org.rut.util.algorithm.support.HeapSort; 7nbB^2
import org.rut.util.algorithm.support.ImprovedMergeSort; _#$*y
import org.rut.util.algorithm.support.ImprovedQuickSort; ?JV|dM
import org.rut.util.algorithm.support.InsertSort; 6"c1;P!4
import org.rut.util.algorithm.support.MergeSort; 'Dvv?>=&
import org.rut.util.algorithm.support.QuickSort; mh<=[J,%p
import org.rut.util.algorithm.support.SelectionSort; eI1GXQ%
import org.rut.util.algorithm.support.ShellSort; aNyvNEV3C
^xf<nNF:p
/** axHK_1N{
* @author treeroot ]$U xCu
* @since 2006-2-2 0-LpqX
* @version 1.0 e*+FpW@
*/ =%zLh<3v
public class SortUtil { `/Nm 2K
public final static int INSERT = 1; yq+!czlZ
public final static int BUBBLE = 2; Z/^ u
public final static int SELECTION = 3; ]"c+sMW
public final static int SHELL = 4; [-&L8Un
public final static int QUICK = 5; +(uYwdcN
public final static int IMPROVED_QUICK = 6; F}"]92
public final static int MERGE = 7; LqdY Qd51
public final static int IMPROVED_MERGE = 8; j)t+jcMUI
public final static int HEAP = 9; & cNy
Mv c`)_Md
public static void sort(int[] data) { pfx3C*
sort(data, IMPROVED_QUICK); 0l;<5
} H+ h07\? %
private static String[] name={ x8;`i$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8Ld:"Y#
}; D>Gt]s
!v]b(z`Y
private static Sort[] impl=new Sort[]{ #,{+3Y&5-+
new InsertSort(), ) 'j:
new BubbleSort(), bCZ gcN
new SelectionSort(), SWp1|.=Sm
new ShellSort(), zqDR7+]
new QuickSort(), do uc('@
new ImprovedQuickSort(), XC7%vDIt
new MergeSort(), z} '!eCl
new ImprovedMergeSort(), *m%]zj0bo
new HeapSort() $+}+zZX5
}; FgL,k
+n}$pM|NKU
public static String toString(int algorithm){ PSawMPw
return name[algorithm-1]; )otb>w5
} DO7W}WU
~OePpa\
public static void sort(int[] data, int algorithm) { u*
impl[algorithm-1].sort(data); azjEq$<M
} y2O4I'/5<
(Qgde6
public static interface Sort { 2xw6 5z
public void sort(int[] data); kt4d;4n
} fF*`'i=!
=h(W4scgqX
public static void swap(int[] data, int i, int j) { h;5LgAY|v
int temp = data; iJnU%
data = data[j]; uP\lCqK,
data[j] = temp; Pmi#TW3X
} /~4"No@
} %!ebO*8q