[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; g`y >)N/
} }LM^>M%
int i1=l; 4Yt:PN2
int i2=mid+1; F04`MY"
for(int cur=l;cur<=r;cur++){ j{7_p$JM
if(i1==mid+1) 1e'-rm F
data[cur]=temp[i2++]; }bIEWho
else if(i2>r) @0A0\2
data[cur]=temp[i1++]; uDafPTF
else if(temp[i1] data[cur]=temp[i1++]; FGr0W|?v
else fH`P8?](x
data[cur]=temp[i2++]; NJz8ANpro$
} =NSLx2:T
} Z]1~9:7ap
rMTtPuc2
} ZJP.-`U
A_{QY&%m
改进后的归并排序: b?CmKiM%
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package org.rut.util.algorithm.support; j Z3N+_J1
v8y77:
import org.rut.util.algorithm.SortUtil; %HL@O]ftS
?T$i
/** _q)`Y:2
* @author treeroot n~8-+$6OR
* @since 2006-2-2 ~fAdOh
* @version 1.0 ^^}
*/ 67}y/C]<
public class ImprovedMergeSort implements SortUtil.Sort { 7eQ7\,^H
F{[2|u(4
private static final int THRESHOLD = 10; [bJ"*^M)
Zr;.`(>
/* TcpD*%wW
* (non-Javadoc) >Hic tH
* gD _tBv
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) lk}R#n$
*/ 'iXjt MX
public void sort(int[] data) { Mn7 y@/1
int[] temp=new int[data.length]; s8WA@)L
mergeSort(data,temp,0,data.length-1); =k2+VI
} zIH[ :
d7It}7@9
private void mergeSort(int[] data, int[] temp, int l, int r) { W2%(a0p
int i, j, k; VpWax]'
int mid = (l + r) / 2; A8e b{qv
if (l == r) [9z<*@$-
return; bNevHKS
if ((mid - l) >= THRESHOLD) ^+mSf`5
mergeSort(data, temp, l, mid); Nq9Qsia&
else G+m|A*[>
insertSort(data, l, mid - l + 1); A}~hc&J
if ((r - mid) > THRESHOLD) xY5Idl->
mergeSort(data, temp, mid + 1, r); h}q+Dw.i
else 6b-d#H/1Y
insertSort(data, mid + 1, r - mid); Z:,HB]&;9
>P>.j+o/
for (i = l; i <= mid; i++) { q}ZZqYk
temp = data; "o<:[c9/
} 9V.)=*0hp
for (j = 1; j <= r - mid; j++) { k#JFDw\
temp[r - j + 1] = data[j + mid]; S?OK@UEJ
} s]5wzbFO
int a = temp[l]; @K4} cP
int b = temp[r]; @s/;y VVq
for (i = l, j = r, k = l; k <= r; k++) { x\3 ` W
if (a < b) { 89`AF1
data[k] = temp[i++]; MO9}Itg
a = temp; }UXj|SY
} else { lr+Kwve
data[k] = temp[j--]; qq[2h~6P]
b = temp[j]; }!Qo wG
} .3{S6#
} d+fmVM?p
} 70lb6A
-66|Y
/** #T#&qo#
* @param data z.e%AcX
* @param l 1 YMaUyL 1
* @param i &^ =t%A%#
*/ 0AJ6g@t[
private void insertSort(int[] data, int start, int len) { e1~C>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); wy&VClT
} : 60PO
} xb8fV*RO8A
} }YU#}Ip@
} X2dTV}~i
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堆排序： %+gze|J
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package org.rut.util.algorithm.support; KOhy)h+ h
fa\<![8LAU
import org.rut.util.algorithm.SortUtil; y\5V(Q\
S,G=MI"
/** n_$lRX5
* @author treeroot ?tqTG2!(
* @since 2006-2-2 H$(%FWzQ%
* @version 1.0 "}7K>|a
*/ kVkV~
public class HeapSort implements SortUtil.Sort{ @ewQx|
Y8m|f
/* (non-Javadoc) #Sb1oLC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v}xz`]MW<,
*/ AJt0l|F
public void sort(int[] data) { y"e'Gg2
MaxHeap h=new MaxHeap(); 1'c!9
h.init(data); {(D$Xb
for(int i=0;i h.remove(); (}4tj4d
System.arraycopy(h.queue,1,data,0,data.length); \dIIZSN
} "h$A.S
Bq79Ev .-
private static class MaxHeap{ ptb t
%?X~,
void init(int[] data){ Y<w2_+(
this.queue=new int[data.length+1]; yHr/i) c
for(int i=0;i queue[++size]=data; / DeIs
fixUp(size); EZ1H0fm
} 5SR29Z[
} ;]Y.2 J
ZS>}NN
private int size=0; m[ay
K`(STvtM
private int[] queue; c#u-E6
%pL ,A5M
public int get() { J^n(WnM*F
return queue[1]; J%j#gyTU
} 0@*rp7
72~)bu
public void remove() { f]T#q@|lE
SortUtil.swap(queue,1,size--); IH}?CZ@{?
fixDown(1); qFe|$rVVIl
} ZN%$k-2
file://fixdown 'V 1QuSd
private void fixDown(int k) { ],qG!,V
int j; ^YenS6`F
while ((j = k << 1) <= size) { ~`T(mh',
if (j < size %26amp;%26amp; queue[j] j++; ZzzQXfA#
if (queue[k]>queue[j]) file://不用交换 @L{HT8utK3
break; +;:i,`Lmg
SortUtil.swap(queue,j,k); (d4zNYK
k = j; ^tc@bsUF
} $w+g%y)
} CWCE}WU>4
private void fixUp(int k) { BI4p3-
while (k > 1) { ^4B6IF*
int j = k >> 1; yK"U:X
if (queue[j]>queue[k]) c{|soc[#
break; (yc$W9
SortUtil.swap(queue,j,k); y ?4|jN
k = j; +r4US or
} _P,fJ`w
} dlJkxEh2
*|_u~v:)|5
} 9e=F
$qg5m,1?
} *bmk(%g
]~3wq[O
SortUtil： zHDC8m
9OF5A<%"u
package org.rut.util.algorithm; Qs#v/r
^a<=@0|
import org.rut.util.algorithm.support.BubbleSort; WAqR70{KM
import org.rut.util.algorithm.support.HeapSort; isWB)$q
import org.rut.util.algorithm.support.ImprovedMergeSort; ,o*b-Cv/
import org.rut.util.algorithm.support.ImprovedQuickSort; uDH)0#
import org.rut.util.algorithm.support.InsertSort; <JF78MD\
import org.rut.util.algorithm.support.MergeSort; #vLDNR
import org.rut.util.algorithm.support.QuickSort; rIW`(IG_
import org.rut.util.algorithm.support.SelectionSort; ;X|;/@@
import org.rut.util.algorithm.support.ShellSort; zr84%_^
KW+^9&lA
/** F4kU) i
* @author treeroot &rcr])jg[
* @since 2006-2-2 *=^_K`y
* @version 1.0 I[tU}ojP
*/ +vDT^|2SF
public class SortUtil { s:I^AL5
public final static int INSERT = 1; -uy}]s5Qu
public final static int BUBBLE = 2; yq6!8OkF
public final static int SELECTION = 3; F[RhuNa&'W
public final static int SHELL = 4; (:Bo'q S
public final static int QUICK = 5; 2rPKZ|
public final static int IMPROVED_QUICK = 6; 2/B(T5PY@
public final static int MERGE = 7; Ls*.=ARq
public final static int IMPROVED_MERGE = 8; @_N -> l
public final static int HEAP = 9; aH'^`]'_=
/\ ~{
public static void sort(int[] data) { V%Y.N4H
sort(data, IMPROVED_QUICK); ScZ$&n
} N;r,B
private static String[] name={ rd%3eR?V
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" d 'x;]#S
}; 8V=I[UF.1?
1;.}u=8
private static Sort[] impl=new Sort[]{ 0IQu6 X
new InsertSort(), 5jx{O${u
new BubbleSort(), OK3B6T5w=
new SelectionSort(), wT*`Od8w
new ShellSort(), K# _plpr
new QuickSort(), z_A%>E4
new ImprovedQuickSort(), WYEvW<Hv
new MergeSort(), 3i35F.=X,
new ImprovedMergeSort(), ^]E| >~\
new HeapSort() X903;&Cim
}; _I5p 7X
' nf"u
public static String toString(int algorithm){ >a_K:O|AJ
return name[algorithm-1]; 1;ZEuO
} ?em)om
w<\N-J|m
public static void sort(int[] data, int algorithm) { dn%/SJC
impl[algorithm-1].sort(data); #?}Y~Oe
} Y$oBsg\v
8ne5 B4
public static interface Sort { 6\~m{@
public void sort(int[] data); oY+RG|j@
} ]r|.\}2Y7
.!)7x3|$[
public static void swap(int[] data, int i, int j) { BN#^ /a-
int temp = data; mI0|lp 1$
data = data[j]; ks(PH6:]<
data[j] = temp; f4@Dn >BJ
} {a%T <WW
} &S3szhe