[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; 06ueE\@Sg
} n*;I2FV]
int i1=l; EfyF]cYL
int i2=mid+1; [$V_qFv{
for(int cur=l;cur<=r;cur++){ )sL:iGU
if(i1==mid+1) 9xSAWKr,l
data[cur]=temp[i2++]; ="u(o(j"
else if(i2>r) bH=5[
data[cur]=temp[i1++]; `@`CZg
else if(temp[i1] data[cur]=temp[i1++]; 9LFg":
else "NJ!A
data[cur]=temp[i2++]; h?TE$&CL?
} MLR3A s
} L7KHs'c*
9<Bf5d
} )kkO:j
s=6w-'; V
改进后的归并排序: b\^.5SEw
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package org.rut.util.algorithm.support; P#yS]F/
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import org.rut.util.algorithm.SortUtil; iWvgCm4
P_qxw-s
/** 2V
* @author treeroot J|I|3h<T
* @since 2006-2-2 1LE8,Gm&
* @version 1.0 E7*]t_p"
*/ *+J&ebSTN
public class ImprovedMergeSort implements SortUtil.Sort { 7f`jl/
;%%=G;b9
private static final int THRESHOLD = 10; Bz24U wcZ
E-Mp|y/V
/* |d Soq~Vz
* (non-Javadoc) %;zA_Wg
* 3w0m:~KS6V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (K2 p3M^
*/ !,1~:*:
public void sort(int[] data) { A5nu`e9&
int[] temp=new int[data.length]; ?$o8=h
mergeSort(data,temp,0,data.length-1); Ak1f*HGl|
} PCFm@S@Q
J"SAA0)@
private void mergeSort(int[] data, int[] temp, int l, int r) { VR_1cwKBM
int i, j, k; O'p7^"M
int mid = (l + r) / 2; TM"i9a? ;
if (l == r) U2K>\/-~
return; I=b#tUBh8
if ((mid - l) >= THRESHOLD) myXp]=Sb?
mergeSort(data, temp, l, mid); Maq{H`
else 4[5Z>2w
insertSort(data, l, mid - l + 1); u2F 3>s
if ((r - mid) > THRESHOLD) 7&+Gv6E
mergeSort(data, temp, mid + 1, r); pM4 j=F
else 2 OGg`1XX
insertSort(data, mid + 1, r - mid); '9b<r7\@
'r'uR5jR
for (i = l; i <= mid; i++) { .!Z.1:YR
temp = data; zg^5cHP\
} >w V$az
for (j = 1; j <= r - mid; j++) { >u6kT\|^C
temp[r - j + 1] = data[j + mid]; iedoL0#
} A]>0lB
int a = temp[l]; @ VJr0
int b = temp[r]; 0tl
for (i = l, j = r, k = l; k <= r; k++) { *ZY{^f
if (a < b) { #$#{QEh0}
data[k] = temp[i++]; mDo]5 i<
a = temp; ?B[Z9Ef"8l
} else { 6v.*%E*P
data[k] = temp[j--]; {9)LHX7dN
b = temp[j]; B\4SB
} @jjp\~
} kKCkjA:o##
} y_a~>S
v1;`.PWD
/** mjH8q&szf
* @param data tFb49zbk
* @param l HeR-;L
* @param i ) I@gy
*/ lM?P8#3
private void insertSort(int[] data, int start, int len) { Vg2s~ce{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); /TpM#hkq/2
} in%+)`'nH7
} (z"Cwa@e
} X, J.!:4`
} rs!J<CRq
whvM^
堆排序： 8;+t.{
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package org.rut.util.algorithm.support; A87Tyk2Pi
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import org.rut.util.algorithm.SortUtil; >j\zj] -"
~Fisno
/** eZf-i1lJ
* @author treeroot !dmI}<@&k
* @since 2006-2-2 }Z2Y>raA\
* @version 1.0 `Ol*"F.+I
*/ UD"e:O_
public class HeapSort implements SortUtil.Sort{ dpTap<Noby
-O-_F6p'D
/* (non-Javadoc) E-&=I> B5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) S[*e K Z
*/ a*=\-;HaZ
public void sort(int[] data) { y?Fh%%uNr
MaxHeap h=new MaxHeap(); u5%.T0 P
h.init(data); i1u &-#k
for(int i=0;i h.remove(); >b<br
System.arraycopy(h.queue,1,data,0,data.length); <L:v28c
} #|2w^Kn
!%]]lxi
private static class MaxHeap{ 'ApWYt
~"{Kjr#R
void init(int[] data){ 0 R^Xn
this.queue=new int[data.length+1]; ~pwp B2c
for(int i=0;i queue[++size]=data; Ks9"U^bPs
fixUp(size); Fy^!*M-
} &eyFApM[Z
} 9%iqequ
L,Uqt,
private int size=0; ~h0SD(
u'LA%l-
private int[] queue; Pp#!yMxBr
Jg|/*Or
public int get() { NCX!ss
return queue[1]; 6-<,1Q'D
} Gz$DsaG
N2=gSEY
public void remove() { /ijj;9EB
SortUtil.swap(queue,1,size--); oP_'0h0X
fixDown(1); e)>Z&e,3
} hDzKB))<w
file://fixdown sd.:PE <
private void fixDown(int k) { ,SS@]9A&
int j; :^! wQ""
while ((j = k << 1) <= size) { rzY7f: '
if (j < size %26amp;%26amp; queue[j] j++; "X"DTP1b
if (queue[k]>queue[j]) file://不用交换 A5B 5pJ
break; M9 _h0
SortUtil.swap(queue,j,k); u6cWLVt
k = j; Cz m`5
} o^7}H{AE
} ^vJ08gu_W
private void fixUp(int k) { 3v5]L3
while (k > 1) { z2S53^C*
int j = k >> 1; "k5 C?~
if (queue[j]>queue[k]) ?OlYJ/!z3
break; LYv+Sv
SortUtil.swap(queue,j,k); NCl$vc;,
k = j; *>zr'Tt,W
} S\s1}`pNm
} B1J+`R3OX
;]+kC
} =i\~][-
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} A:& `oJl
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SortUtil： HFvhrG
D("['`{
package org.rut.util.algorithm; o#Rao#bD:
F2OU[Z,-]
import org.rut.util.algorithm.support.BubbleSort; ZXe[>H
import org.rut.util.algorithm.support.HeapSort; W)$;T%u
import org.rut.util.algorithm.support.ImprovedMergeSort; !5Z?D8dcx
import org.rut.util.algorithm.support.ImprovedQuickSort; Nr6YQH*[
import org.rut.util.algorithm.support.InsertSort; boJQ3Xc
import org.rut.util.algorithm.support.MergeSort; SQWA{f
import org.rut.util.algorithm.support.QuickSort; ^4c2}>f
import org.rut.util.algorithm.support.SelectionSort; D?8t'3no
import org.rut.util.algorithm.support.ShellSort; ~+V]MT
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/** ;x|4Tm
* @author treeroot =KMd! $J\
* @since 2006-2-2 pcoJ\&&W
* @version 1.0 0 l G\QT
*/ _QkU,[E
public class SortUtil { DTAEfs!ZW
public final static int INSERT = 1; 3sHC1+
public final static int BUBBLE = 2; KvkiwO(
public final static int SELECTION = 3; 4,wdIdSm4
public final static int SHELL = 4; =HYMX"s
public final static int QUICK = 5; u.1u/o1"
public final static int IMPROVED_QUICK = 6; fb&K.6"
public final static int MERGE = 7; ([`-*Hy
public final static int IMPROVED_MERGE = 8; gXc&uR0S
public final static int HEAP = 9; xBR2tDi%
v=iz*2+X
public static void sort(int[] data) { O#CxS/M5
sort(data, IMPROVED_QUICK); (E\7Ui0Q
} +twJHf_U
private static String[] name={ e8--qV#<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <b{Le{QJ*
}; }m\
oIQor%z
private static Sort[] impl=new Sort[]{ ~Se/uL;*
new InsertSort(), FwmE1,
new BubbleSort(), on\0i{0l8
new SelectionSort(), T1\.~]-msb
new ShellSort(), \CX`PZ><
new QuickSort(), adHHnH`,
new ImprovedQuickSort(), _+.z2} M
new MergeSort(), .ye5;A}
new ImprovedMergeSort(), @1^iWM j
new HeapSort() )I$_wB!UV
}; JG0TbM1(Bt
9Z6O{ >
public static String toString(int algorithm){ Z:u7`%
return name[algorithm-1]; AIN_.=]"?
} ~^KemwogPN
/8Ca8Ju
public static void sort(int[] data, int algorithm) { {*yhiE,
impl[algorithm-1].sort(data); &HT PeB
} |JnJ=@-y
6 @'v6 1'
public static interface Sort { vAHJP$x
public void sort(int[] data); |A[Le ;,
} -8#Of)W
;UArDwH
public static void swap(int[] data, int i, int j) { +f;z{)%B
int temp = data; *-ZJF6
data = data[j]; !H~G_?Mf\O
data[j] = temp; Q~te`
} h9 [ov)
} ZYc)_Og