[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( +E0
} XG_Iq ,
int i1=l; UONW3}-
int i2=mid+1; )./.rtP|4
for(int cur=l;cur<=r;cur++){ -(YdK8
if(i1==mid+1) 'hw_ew
data[cur]=temp[i2++]; g&6O*vx
else if(i2>r) _Q3Ad>,U
data[cur]=temp[i1++]; WmT(>JBO
else if(temp[i1] data[cur]=temp[i1++]; Z,bvD'u
else |`yzH$,F
data[cur]=temp[i2++]; ewb/Z[4
} ]VS$ ?wD
} =\l7k<
hV4\#K[
} Mb0cdK?hA
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改进后的归并排序: 2eh j2T
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package org.rut.util.algorithm.support; W!G2$e6
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import org.rut.util.algorithm.SortUtil; $6]7>:8mz
N}2xt)JZz
/** <r{ )*]#l
* @author treeroot k(v8zDq*
* @since 2006-2-2 * 5Y.9g3)Q
* @version 1.0 4?a!6
*/ 2!^[x~t
public class ImprovedMergeSort implements SortUtil.Sort { -O=a"G=
(iZE}qf7g
private static final int THRESHOLD = 10; h.W;Dmf6]
);.q:"
/* uY;2tZldf=
* (non-Javadoc) {%;KkC8=R
* jW-j+WGSM
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z 7M%}V%
*/ $&|*v1rH
public void sort(int[] data) { Nl^{w'X0h
int[] temp=new int[data.length]; &G>EBKn\2`
mergeSort(data,temp,0,data.length-1); @#%rTKD9F
} d#9"_{P
*0,?QS-a
private void mergeSort(int[] data, int[] temp, int l, int r) { l&d 6G0
int i, j, k; R.EA5X|_
int mid = (l + r) / 2; =*YK6
if (l == r) K"sfN~@rT[
return; KR6*)?c`
if ((mid - l) >= THRESHOLD) hC.7Z]
mergeSort(data, temp, l, mid); <E|K<}W#
else bTn7$EG
insertSort(data, l, mid - l + 1); L:y} L
if ((r - mid) > THRESHOLD) syYg, G[
mergeSort(data, temp, mid + 1, r); Hop$w
else <4W"ne28
insertSort(data, mid + 1, r - mid); AE)<ee%\\
2>l:: 8Pp
for (i = l; i <= mid; i++) { !$>d75zli
temp = data; 2dr[0tE
} y/m^G=Q6g#
for (j = 1; j <= r - mid; j++) { |Aw(v6
temp[r - j + 1] = data[j + mid]; F`ifHO
} o2 5kFD
int a = temp[l]; x hFQjV?V
int b = temp[r]; *My?l75
for (i = l, j = r, k = l; k <= r; k++) { u|=G#y;3
if (a < b) { eYurg6Ob~
data[k] = temp[i++]; q)ygSOtj
a = temp; L30x2\C
} else { KsGSs9
data[k] = temp[j--]; VX<ZB +R
b = temp[j]; b+NF:-fO
} W.ud<OKP90
} b\%=mN
} OH28H),}
&DFe+y~PR
/** $;_'5`xs
* @param data ,$habq=;
* @param l 2oAPJUPOJ
* @param i ^b`}g
*/ x,js}Mlw
private void insertSort(int[] data, int start, int len) { sa`7_KB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); $.}fL;BzVz
} ih?_ fW
} +0=u]
} !+.|T9P
} w.cQ|_
!UD62yw~
堆排序： zVs_|x="
Hi{c[;
package org.rut.util.algorithm.support; )@3ce'
QJo)
import org.rut.util.algorithm.SortUtil; Xu$xO(
MjG=6.J|`
/** f{lg{gA(
* @author treeroot LS?hb)7
* @since 2006-2-2 O!zH5
* @version 1.0 e+=Ojo#
*/ kRskeMr:Rd
public class HeapSort implements SortUtil.Sort{ WZRrqrjq
nD.4c-hd$q
/* (non-Javadoc) K,' ]G&K
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Zb7KHKO{
*/ KMznl=LF
public void sort(int[] data) { (@O F Wc"p
MaxHeap h=new MaxHeap(); A$W,#`E
h.init(data); !a3cEzs3
for(int i=0;i h.remove(); ]}F_nc2L
System.arraycopy(h.queue,1,data,0,data.length); Tn/ 3`j {
} K3?7Hndf2
QQ97BP7W
private static class MaxHeap{ > K,Q`sS
K(Otgp+zb
void init(int[] data){ C$)#s{*
this.queue=new int[data.length+1]; pq>"GEN
for(int i=0;i queue[++size]=data; anA>'63
fixUp(size); FgRlxz
} YmHn*N}:U
} L1.<LB^4'
A7-QOqST(
private int size=0; !yH&l6s
@6ZQkX/
private int[] queue; }Fyf?TZ$T
hkv&Od,
public int get() { ,a< !d
return queue[1]; 8:-[wl/@
} J}KATpHs
w*Sl
public void remove() { FgQd7p
SortUtil.swap(queue,1,size--); 52K3N^RgR
fixDown(1); 6ndt1W z
} j$zw(EkN
file://fixdown ,jbj-b(
private void fixDown(int k) { eqs.zL
int j; 9<P1?Q
while ((j = k << 1) <= size) { _i:yI-jA
if (j < size %26amp;%26amp; queue[j] j++; O~-#>a
if (queue[k]>queue[j]) file://不用交换 j,Qp*b#Qo
break; 8@Xq ,J
SortUtil.swap(queue,j,k); KCDEMs}}zM
k = j; ar=uDb;
} Kw&J<H
} 'wLQ9o%=p|
private void fixUp(int k) { ^{-J Y
while (k > 1) { +QuaQ% lA
int j = k >> 1; P$Xig
if (queue[j]>queue[k]) k%/Z.4vQG
break; ?^2(|t9KU
SortUtil.swap(queue,j,k); n'1pNL:
k = j; 28LjQ!
} a~7`;Ar
} (5;w^E9*n;
1Xt%O86
} [$]vi`c2
%ztCcgu*
} E*.D_F
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SortUtil： OYgD9T.8^
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package org.rut.util.algorithm; 1N1MD@C?P
4{X5ZS?CkI
import org.rut.util.algorithm.support.BubbleSort; 5)2lZ(5.A#
import org.rut.util.algorithm.support.HeapSort; :Y0*P
import org.rut.util.algorithm.support.ImprovedMergeSort; U=QV^I Qm
import org.rut.util.algorithm.support.ImprovedQuickSort; =5oE|F%
import org.rut.util.algorithm.support.InsertSort; ,S2D/Y^>
import org.rut.util.algorithm.support.MergeSort; H{E223
import org.rut.util.algorithm.support.QuickSort; gx#xB8n
import org.rut.util.algorithm.support.SelectionSort; `3SY~&X
import org.rut.util.algorithm.support.ShellSort; W7S`+Pq
7P?z{x':T
/** 0tC+?
* @author treeroot w=s:eM@
* @since 2006-2-2 bwqla43gX
* @version 1.0 !GURn1vcAe
*/ xYRN~nr
public class SortUtil { yK_$6EtNKj
public final static int INSERT = 1; Nqk*3Q"f
public final static int BUBBLE = 2; -k|r#^(G2
public final static int SELECTION = 3; 4H]Go~<
public final static int SHELL = 4; gb|C592R5C
public final static int QUICK = 5; w{UVo1r:
public final static int IMPROVED_QUICK = 6; C!]hu)E
public final static int MERGE = 7; lDnF(
public final static int IMPROVED_MERGE = 8; sikG}p0mx<
public final static int HEAP = 9; =m:xf&r#
B5~S&HQ?B6
public static void sort(int[] data) { 0ym>Hbax)
sort(data, IMPROVED_QUICK); z^T/kK3I
} :&HrOdz
private static String[] name={ _)yn6M'Dt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" vXAO#'4tm%
}; 6UG7lH!M
7MZBU~,r
private static Sort[] impl=new Sort[]{ [DC8X P5<
new InsertSort(), ?V4?r2$c
new BubbleSort(), (q59cAw~X
new SelectionSort(), f6j;Y<}' g
new ShellSort(), 93$'PwWgiF
new QuickSort(), 1\=)b< y
new ImprovedQuickSort(), C,P>7
new MergeSort(), Pb]: i+c)
new ImprovedMergeSort(), 75u/'0~5
new HeapSort() D kl4^}
}; JQj?+PI
4%LGPh
public static String toString(int algorithm){ %YlL-*7L
return name[algorithm-1]; L%}k.)yev
} zXx HaM
d`5xd@p
public static void sort(int[] data, int algorithm) { KaNi'=nW
impl[algorithm-1].sort(data); PxNp'PZr9
} --4,6va`e
3s<~}&"
public static interface Sort { zt/b S/
public void sort(int[] data); I} m\(TS-"
} Z,^`R] 9
+3dWnBg?
public static void swap(int[] data, int i, int j) { vxhs1vh
int temp = data; 7xTgG!>v
data = data[j]; \ $;E,
data[j] = temp; RZ-=UIf
} w=Ac/12
} <u]M):b3