[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; QI'Oz{vE
} $5aV:Z3P
int i1=l; \fz<.l]
int i2=mid+1; &8Cu#^3
for(int cur=l;cur<=r;cur++){ 1WxK#c-)
if(i1==mid+1) v3~?;f,l
data[cur]=temp[i2++]; chM%]|gey
else if(i2>r) 1\ o59Y
data[cur]=temp[i1++]; -*Xa3/kQ
else if(temp[i1] data[cur]=temp[i1++]; r!_-"~`7E
else 3no%E03p
data[cur]=temp[i2++]; 7)`nD<j5
} gY/"cq
} tkeoNuAM
PUp6Q;AdQ
} EE&K0<?T|:
+" .X )avF
改进后的归并排序: zy/@ WFPE
#rMlI3;
package org.rut.util.algorithm.support; f-vCm 5f
naG=Pq<
import org.rut.util.algorithm.SortUtil; LM~[@_j
_|kxY'_[8
/** 9-&Ttbb4)0
* @author treeroot x kx^%3dV
* @since 2006-2-2 g:g\>@Umo
* @version 1.0 Ns>- o
*/ P+@/O
public class ImprovedMergeSort implements SortUtil.Sort { BKCA<
)WNzWUfn=z
private static final int THRESHOLD = 10; cOmw?kA*G
2b}t,&bv?
/* (-UYB9s
* (non-Javadoc) |mxDjgq
* MU@UfB|;u
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) n\Z!ff/
*/ k+# %DK
public void sort(int[] data) { H%qsjB^
int[] temp=new int[data.length]; ^me-[ 5
mergeSort(data,temp,0,data.length-1); :3v}kLO7|
} ?8npG]L)
pnl{&<$C%C
private void mergeSort(int[] data, int[] temp, int l, int r) { {j.bC@hWw
int i, j, k; orzZ{87
int mid = (l + r) / 2; hci6P>h<ia
if (l == r) x[FJgI'r
return; nsu@h
if ((mid - l) >= THRESHOLD) "%`1]Fr
mergeSort(data, temp, l, mid); BRw .]&/
else }MJy +Z8&
insertSort(data, l, mid - l + 1); ,?J!
if ((r - mid) > THRESHOLD) Uf:`
mergeSort(data, temp, mid + 1, r); >{q]&}^U
else J{.{f
insertSort(data, mid + 1, r - mid); l5S aT,%
0IsPIi"7
for (i = l; i <= mid; i++) { wL+s8#{
temp = data; ,;EIh}
} LC,F <>w1
for (j = 1; j <= r - mid; j++) { 8zZvht*
temp[r - j + 1] = data[j + mid]; LA!?H]
} [;n9:Qxf
int a = temp[l]; [>jbhV'
int b = temp[r]; .p<:II:6
for (i = l, j = r, k = l; k <= r; k++) { Kfbb)?
if (a < b) { NH[kNi'
data[k] = temp[i++]; k$4y9{
a = temp; `!obGMTQ<
} else { F~,Mw8
data[k] = temp[j--]; ]0Y4U7W
b = temp[j]; \o z#l'z
} 0!4Ts3qn1
} &W|[r(
} J?*1*h
Gw}%{=D9
/** /j#n
* @param data ux=w!y;}
* @param l 8o3E0k1
* @param i %"q9:{m
*/ W,K;6TZhh
private void insertSort(int[] data, int start, int len) { L^r#o-H<
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >@U*~Nz
} qrb[-|ie&
} rlMLW
} QJZK|*
} .N,bIQnj
5VfyU8)7X
堆排序： _('=b/
BOX{]EOj
package org.rut.util.algorithm.support; ~k"=4j9
IB(6+n,6s
import org.rut.util.algorithm.SortUtil; h){0rX@:&
.UQzPnK
/** 0CWvYC%e
* @author treeroot uu-PJTNZ
* @since 2006-2-2 {AhthR%(1
* @version 1.0 ?fQ'^agq
*/ &u]8IEv}u
public class HeapSort implements SortUtil.Sort{ 3$jT*OyG#
gt\E`HB8E
/* (non-Javadoc) .r|tSfm6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ryl:a\
*/ ?1*cO:O
public void sort(int[] data) { K='z G*$l
MaxHeap h=new MaxHeap(); S){)Z
h.init(data); U#0Q)
for(int i=0;i h.remove(); #%pI(,o=
System.arraycopy(h.queue,1,data,0,data.length); y;4OY
} _F4Ii-6
fJ=0HNmX
private static class MaxHeap{ v3*_9e
%@<8<6&q
void init(int[] data){ V)3KS-
this.queue=new int[data.length+1]; c_dVWh e
for(int i=0;i queue[++size]=data; %h hfU6[
fixUp(size); w0[6t#$F
} U2ohHJ``
} C+*d8_L
$r^GE
private int size=0; [NF'oRRD9s
5A,K6f@:g
private int[] queue; L{#IT.
bc7/V#W
public int get() { G?9"Y%
return queue[1]; O24m;oHM
} UgRhWV~f0
@Y?#Sl*
public void remove() { #?RU;1)Cw
SortUtil.swap(queue,1,size--); .fn\]rUv
fixDown(1); .nO\kgoK
} <NHH^M\N
file://fixdown W1WYej"
private void fixDown(int k) { fPU`/6
int j; 0!D4pvlt
while ((j = k << 1) <= size) { oF vfCrd
if (j < size %26amp;%26amp; queue[j] j++; y>S.?H:P
if (queue[k]>queue[j]) file://不用交换 x" 7H5<
break; W=ig.-
SortUtil.swap(queue,j,k); Z3%}ajPu[
k = j; bes<qy
} r^2p*nr}
} 'Oxy$U
private void fixUp(int k) { )i6mzzj5
while (k > 1) { f@6QvkIa
int j = k >> 1; c& <Fr[AK
if (queue[j]>queue[k]) Yh7rU?Gj
break; C:GK,?!Jn'
SortUtil.swap(queue,j,k); nz%DM<0$
k = j; Pi=+/}
} GL&y@6
} },uF4M.K
+u.1 ;qF
} <<UB ^v m
GeI-\F7b
} CJtcn_.F
'|ad_M
SortUtil： {vs uPY
85>05?
package org.rut.util.algorithm; rUTcpGH
XFg9P}"
import org.rut.util.algorithm.support.BubbleSort; oL-]3TY~
import org.rut.util.algorithm.support.HeapSort; Y21g{$~Q{
import org.rut.util.algorithm.support.ImprovedMergeSort; xg30xC[
import org.rut.util.algorithm.support.ImprovedQuickSort; z__EYh
import org.rut.util.algorithm.support.InsertSort; -N6f1>}pE
import org.rut.util.algorithm.support.MergeSort; toLV4BtIG
import org.rut.util.algorithm.support.QuickSort; &]V.S7LC#
import org.rut.util.algorithm.support.SelectionSort; 5]~'_V
import org.rut.util.algorithm.support.ShellSort; ^/uA?h:]\
H-WJp<_
/** N1Ng^aY0
* @author treeroot -#7'r<I9@
* @since 2006-2-2 09|K>UC)v
* @version 1.0 j_/>A=OD
*/ F7A=GF'
public class SortUtil { ^pxX]G]
public final static int INSERT = 1; tI]Q%S,
public final static int BUBBLE = 2; ,%6P0#-
public final static int SELECTION = 3; 'g6\CZw(#
public final static int SHELL = 4; bNm#tmSt
public final static int QUICK = 5; u$h 4lIl
public final static int IMPROVED_QUICK = 6; C](f>)Dz /
public final static int MERGE = 7; j1^I+j)
public final static int IMPROVED_MERGE = 8; rTM}})81
public final static int HEAP = 9; :=}BN
? 8)'oMD
public static void sort(int[] data) { Z.c'Hs+;
sort(data, IMPROVED_QUICK); 6rh5h:
} yu;+o3WlK
private static String[] name={ bG7O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2-&k^Gl!:
}; ?iPC*
"K ~
private static Sort[] impl=new Sort[]{ \O}E7-
new InsertSort(), bT\1>
new BubbleSort(), ccB&O _
new SelectionSort(), ydFD!mO
new ShellSort(), LE&RY[
new QuickSort(), ~:0sk"t$1
new ImprovedQuickSort(), qUh2hz:
new MergeSort(), R_(tjkT
new ImprovedMergeSort(), 1=t>HQ
new HeapSort() U [*FCD!~
}; N<|@ymi
4h~iPn'Wl
public static String toString(int algorithm){ 5G::wuxk
return name[algorithm-1]; 'GB.UKlR
} s2teym,uG
yQU_>_!n
public static void sort(int[] data, int algorithm) { a,xycX:U
impl[algorithm-1].sort(data); Mx&&0#;r
} b$4"i XSQ
$RYa6"`
public static interface Sort { } uO);k5H
public void sort(int[] data); q_TRq:&.
} ,X#2\r<|
7"aN#;&
public static void swap(int[] data, int i, int j) { AB=daie
int temp = data; #EO9UW5
data = data[j]; <d,b'<z s
data[j] = temp; U@g4w!$r
} Q7*SE%H
} b8~Bazk