[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; ?Mj@;O9>'
} .ZVADVg\
int i1=l; Pq<]`9/w^w
int i2=mid+1; )ePQN~#K}
for(int cur=l;cur<=r;cur++){ lG/h[
if(i1==mid+1) 6b7SA,
data[cur]=temp[i2++]; KwxO%/-}S
else if(i2>r) AD0pmD
data[cur]=temp[i1++]; (d?sFwOt\
else if(temp[i1] data[cur]=temp[i1++]; |<Rf^"T
else ]dU/;8/%
data[cur]=temp[i2++]; zv>7;En3
} T8US` MZ
} Ef"M e(
/s|4aro
} +)U>mm,
&Z%|H>+;T
改进后的归并排序: tjWf`#tH>H
oRZ--1oR_
package org.rut.util.algorithm.support; 4cQ|"sOzD
rI;84=v2&9
import org.rut.util.algorithm.SortUtil; fKkH [
d'UCPg<Y
/** Cj3C%W
* @author treeroot 2r*Yd(e
* @since 2006-2-2 .{-C*
* @version 1.0 N^@aO&+A
*/ j3_vh<U\
public class ImprovedMergeSort implements SortUtil.Sort { /{sFrEMP\
WcZck{ehd
private static final int THRESHOLD = 10; o>?#$~XNv
eUZvJTE
/* Z+M* z;
* (non-Javadoc) {<#~Ya-
* $^ZugD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) oJln"-M1nx
*/ >j}.~$6dj_
public void sort(int[] data) { m6iQB\ \
int[] temp=new int[data.length]; e)):U
mergeSort(data,temp,0,data.length-1); d7i 0'R
} ITr@;@}c]
|4?O4QN
private void mergeSort(int[] data, int[] temp, int l, int r) { )zYm]\@
int i, j, k; Pp~:e}
int mid = (l + r) / 2; }MCJ$=5
if (l == r) Lju)q6
return; ]J)3y+;P
if ((mid - l) >= THRESHOLD) P8\bi"iiN
mergeSort(data, temp, l, mid); p0bMgP
else 5* 3T+OK
insertSort(data, l, mid - l + 1); 5rPK7Jh`B
if ((r - mid) > THRESHOLD) l6z}D;4
mergeSort(data, temp, mid + 1, r); {wy#HYhv
else \`N<0COP
insertSort(data, mid + 1, r - mid); c@<vFoq
_X"G(
for (i = l; i <= mid; i++) { Y2 QX9RN
temp = data; 04}" n
} H;k-@J
for (j = 1; j <= r - mid; j++) { 9S! 2r
temp[r - j + 1] = data[j + mid]; 5 4vDP9
} x-Ug(/!^
int a = temp[l]; S :%SarhBD
int b = temp[r]; *fg|HH+i
for (i = l, j = r, k = l; k <= r; k++) { BELxaV,
if (a < b) { SM1[)jZ-
data[k] = temp[i++]; y~-dQ7r
a = temp; Yj#4{2A
} else { |a{~Imz{
data[k] = temp[j--]; 2GW.'\D
b = temp[j]; SU80i`
} dWDM{t\}\
} \Zbi`;m?
} {ZR>`'^:
hsEQ6
/** c2fqueK|:W
* @param data eA'1
* @param l p"k[ac{
* @param i tShyG!b
*/ dp~] Wx
private void insertSort(int[] data, int start, int len) { m%[`NP (
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); XJ{b_h#N
} +#=l{_Z,ZJ
} $Q'S8TU
} p|,3X*-ynx
} N&K`bmtD
w$%1j+%&
堆排序： Ks_B%d
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package org.rut.util.algorithm.support; A$;"9F@
W1;u%>Uh
import org.rut.util.algorithm.SortUtil; c D0-g=&
ne-;gTP;
/** 8 bpYop7 L
* @author treeroot 7f,!xh$
* @since 2006-2-2 2SHS!6:Rl
* @version 1.0 5ON\Ve_H
*/ j8|N;;MN
public class HeapSort implements SortUtil.Sort{ {IR-g,B
Qqn9nO9
/* (non-Javadoc) q{E44 eQ7F
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &|&tPD/dJ
*/ T=D|jt
public void sort(int[] data) { J_ y+.p- 5
MaxHeap h=new MaxHeap(); nBo?r}t4
h.init(data); # @~HpqqR
for(int i=0;i h.remove(); qr|v|Ejd~
System.arraycopy(h.queue,1,data,0,data.length); @kmOz(
} KCc7u8
0kOl,%Ey
private static class MaxHeap{ =>en<#[\:
Yp(F}<f?
void init(int[] data){ &/-^D/ot
this.queue=new int[data.length+1]; 9#iv|X
for(int i=0;i queue[++size]=data; 7w?V0pLwn8
fixUp(size); N`1W"Rx!
} yhzZ[vw7k
} .lE7v-e
UD}#c:I
private int size=0; Z:3SI$tO
Ptj[9R
private int[] queue; rmh 1.W
wM aqR"%
public int get() { Htn''adg5
return queue[1]; ;(I')[R"
} ,UE>@;]
.{ +Obi
public void remove() { #'lqE)T
SortUtil.swap(queue,1,size--); |jT^[q(z
fixDown(1); '7;b+Vbl#
} ZA{T0:
file://fixdown h =E)5&Z
private void fixDown(int k) { rD":Gac
int j; zC<k4[.
while ((j = k << 1) <= size) { Lw_s'QNWR
if (j < size %26amp;%26amp; queue[j] j++; !gbPxfH:6
if (queue[k]>queue[j]) file://不用交换 qOM"?av
break; GX-V|hLaGX
SortUtil.swap(queue,j,k); oTLA&dy@
k = j; .m/$ku{/J
} `j)S7KN
} L$rMfeS
private void fixUp(int k) { ]R?{9H|jwE
while (k > 1) { %f'mW2
int j = k >> 1; (]gd$BgD
if (queue[j]>queue[k]) :+*q,lX8
break; pN?geF~t|
SortUtil.swap(queue,j,k); }XcYIo#+t
k = j; ?=#vp /
} o +KDK{MD
} pB0p?D)n
+$y%H
} Tt\h#E
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} 9?J 3G,&
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SortUtil： ckhU@C|=*
97 eEqI$#
package org.rut.util.algorithm; x4=Sm0Ro|V
hw9qnSeRy
import org.rut.util.algorithm.support.BubbleSort; 'h.:-1# L
import org.rut.util.algorithm.support.HeapSort; m(DJ6CSa
import org.rut.util.algorithm.support.ImprovedMergeSort; lNRGlTD%
import org.rut.util.algorithm.support.ImprovedQuickSort; B/F6WQdZ
import org.rut.util.algorithm.support.InsertSort; P#o"T4 >
import org.rut.util.algorithm.support.MergeSort; 56`Tna,t
import org.rut.util.algorithm.support.QuickSort; rK@XC +`S
import org.rut.util.algorithm.support.SelectionSort; |x#w8=VP-
import org.rut.util.algorithm.support.ShellSort; ]/ffA|"U`
R!Lh~~@{(
/** c+A$ [
* @author treeroot 4-voR5Fd
* @since 2006-2-2 }"x#uG
* @version 1.0 ]:_s7v
*/ 8Z[YcLy"({
public class SortUtil { `WRM7
public final static int INSERT = 1; $s.:H4:I
public final static int BUBBLE = 2; j0`)mR}
public final static int SELECTION = 3; K6d2}!5
public final static int SHELL = 4; tPqWe2
public final static int QUICK = 5; UYw=i4J'
public final static int IMPROVED_QUICK = 6; <reALC
public final static int MERGE = 7; I6-.;)McO
public final static int IMPROVED_MERGE = 8; v1O1-aM
public final static int HEAP = 9; :}*
sFbN)Cx
public static void sort(int[] data) { <N'v-9=2jl
sort(data, IMPROVED_QUICK); c$P68$FB
} A}3dx!?7j
private static String[] name={ l' mdj!{&
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" `p'682xI
}; ,7h0y
"zZZ h
private static Sort[] impl=new Sort[]{ bGtS! 'I
new InsertSort(), X 7R&>Pf
new BubbleSort(), *YO^+]nmY
new SelectionSort(), sD ,=_q@
new ShellSort(), -\[H>)z]RB
new QuickSort(), QCAoL.v
new ImprovedQuickSort(), e%_J O7
new MergeSort(), OaeX:r+&Q
new ImprovedMergeSort(), AEd]nVV Q
new HeapSort() ?RQ_LA;
}; F?+\J =LT
i@m@]-2
public static String toString(int algorithm){ H ]z83:Z
return name[algorithm-1]; "K c/Cs2[
} Ygq;jX
q,m+W='
public static void sort(int[] data, int algorithm) { lx\9Y8
impl[algorithm-1].sort(data); q5xF~SQGw2
} Us2IeR
h<<uef9
public static interface Sort { `F`{s`E)
public void sort(int[] data); .L@gq/x)
} #1De#uZ
giYlLJA*}
public static void swap(int[] data, int i, int j) { rt0_[i
int temp = data; 8AQ__&nT
data = data[j]; wQ9?Z.-$
data[j] = temp; nq5qUErew
} `nrw[M?
} 10d.&vNw