[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; ^blw\;LB
} DI2e%`$
int i1=l; <eS/-W%n6
int i2=mid+1; wVnmT94
for(int cur=l;cur<=r;cur++){ $Cfp1#
if(i1==mid+1) 8>6<GdGL<n
data[cur]=temp[i2++]; D15-pz|Q
else if(i2>r) u a_w5o7
data[cur]=temp[i1++]; g\@.qKF
else if(temp[i1] data[cur]=temp[i1++]; T4"D&~3 3q
else ztX$kX:_m
data[cur]=temp[i2++]; S-Vj$asv!
} /F~/&p1<\k
} 8F`8=L NO
^B}m~qT
} ~ss6yQ$
ruB D ^-
改进后的归并排序: BG?>)]6
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package org.rut.util.algorithm.support; xS5 -m6/
]4c+{
import org.rut.util.algorithm.SortUtil; .74C~{}$
xP&7i'ag
/** 0H^*VUyW/
* @author treeroot Fb8d=Zc
* @since 2006-2-2 Lw_|o[I}
* @version 1.0 " M?dU^U^
*/ .Wy'
public class ImprovedMergeSort implements SortUtil.Sort { PuGs%{$(h
&Mudu/KTr
private static final int THRESHOLD = 10; H)gc"aRe;Y
5|K[WvG@Co
/* "G.X=, V
* (non-Javadoc) 3Wv^{|^
* Cb+$|Kg/"b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) .udLMS/_
*/ !bYVLFp=\_
public void sort(int[] data) { Ry]9n.y
int[] temp=new int[data.length]; g0U?`;n$
mergeSort(data,temp,0,data.length-1); R2-F@_
} 3e1-w$z&S
j=M%*`@
private void mergeSort(int[] data, int[] temp, int l, int r) { BSgT 6K
int i, j, k; 7g+T
int mid = (l + r) / 2; 42"nbJ
if (l == r) QkD ~
return; 0!0e$!8l
if ((mid - l) >= THRESHOLD) 7kE+9HmfMk
mergeSort(data, temp, l, mid); S\A0gOL^
else xRXvTNEg
insertSort(data, l, mid - l + 1); m[3c,Axl7
if ((r - mid) > THRESHOLD) 83/m^^F{]
mergeSort(data, temp, mid + 1, r); _u$DcA8B
else ]3f[v:JQ
insertSort(data, mid + 1, r - mid); &;P\e
u^{p'a'
for (i = l; i <= mid; i++) { js <Up/1
temp = data; @_-,Q5
} >Jx=k"Kv+
for (j = 1; j <= r - mid; j++) { GF%/q:9
temp[r - j + 1] = data[j + mid]; uK"FopUJ4i
} 'F.P93
int a = temp[l]; sRT H_]c
int b = temp[r]; `VO;\s$5j
for (i = l, j = r, k = l; k <= r; k++) { n9={D
if (a < b) { tm=,x~
data[k] = temp[i++]; *9kg\#
a = temp; ZSe30Rl\
} else { X5 or5v
data[k] = temp[j--]; ~i?A!
b = temp[j]; #\Rxqh7
} z|%Pi J,
} X5[t6q!
} {x,)OgK!{
?yq=c
/** Um4zI>
* @param data uZrp ^
* @param l .-tR <{ g
* @param i g1[BrT,
*/ ^`";GnH0
private void insertSort(int[] data, int start, int len) { _!DH/?aU
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZZo<0kDk
} #.HnO_sK_
} l~]] RgU
} *(q?O_3,b
} SF-"3M
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堆排序： |a#ikY _nd
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package org.rut.util.algorithm.support; w[gt9]}N
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import org.rut.util.algorithm.SortUtil; fv8x7l7
@XzfuuE]
/** JP6 Noia
* @author treeroot A~a 3bCX+"
* @since 2006-2-2 mKO~`Wq%@
* @version 1.0 U.t][#<3
*/ ]3Ia>i
public class HeapSort implements SortUtil.Sort{ !Ea!"}
-;_"Y]#
/* (non-Javadoc) AJ*17w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2h51zG#qd
*/ 16 `M=R
public void sort(int[] data) { |au`ph5
MaxHeap h=new MaxHeap(); T{+a48,;
h.init(data); `+\$
for(int i=0;i h.remove(); 9Q s5e
System.arraycopy(h.queue,1,data,0,data.length); Lv%t*s2$/
} _p0Yhju?
Evm3Sm!S
private static class MaxHeap{ [=jZP,b&),
k $gcQ:|
void init(int[] data){ Sj(>G;
this.queue=new int[data.length+1]; vJ'22)n
for(int i=0;i queue[++size]=data; -kLBq:M
fixUp(size); h092S|iY
} <H60rON
} +CBN[/Z^i
d>)=|
private int size=0; ZXYyG`3+
T=42]h
private int[] queue; a}NB6E)-
!vu-`u~86
public int get() { Kj @<$ChZw
return queue[1]; #`|Nm3b
} V9"R8*@-
ig.Z,R3@r
public void remove() { v; #y^O
SortUtil.swap(queue,1,size--); &57~i=A 3
fixDown(1); uVU)LOx
} 7MrHu2rZ=
file://fixdown RNB&!NC
private void fixDown(int k) { }9\6!GY0
int j; 61kSCu
while ((j = k << 1) <= size) { BI)C\D3[
if (j < size %26amp;%26amp; queue[j] j++; i&6U5Va,G
if (queue[k]>queue[j]) file://不用交换 vPYHM2
break; %4!^AA%
SortUtil.swap(queue,j,k); #*CMf.OCh
k = j; 1PdG1'
} +\_\53
} BE@(| U
private void fixUp(int k) { "QXnE^
while (k > 1) { kK4a;j.#
int j = k >> 1; >Df;1:U
if (queue[j]>queue[k]) >e6OlIW
break; ]h`*w
SortUtil.swap(queue,j,k); 18F}3t??
k = j; q9ra
} ;AOLbmb)H4
} =bD.5,F)
ya~;Of5
} nsi?.c&0!
OjlX<y.
} \v-I<"::
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SortUtil： U'" #jT
[#@lsI
package org.rut.util.algorithm; BXdk0
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import org.rut.util.algorithm.support.BubbleSort; ^rq\kf*]
import org.rut.util.algorithm.support.HeapSort; xOShO"4Z
import org.rut.util.algorithm.support.ImprovedMergeSort; ?C fQwY#N
import org.rut.util.algorithm.support.ImprovedQuickSort; }W 5ks-L6
import org.rut.util.algorithm.support.InsertSort; u5ZyOZ;
import org.rut.util.algorithm.support.MergeSort; ~3gazTe9
import org.rut.util.algorithm.support.QuickSort; l@GJcCufE
import org.rut.util.algorithm.support.SelectionSort; hE=xS:6
import org.rut.util.algorithm.support.ShellSort; OV;VsF
3^wHL:u
/** !6X6_ +}M
* @author treeroot P/ 6$TgQ
* @since 2006-2-2 Lwi"K8.u
* @version 1.0 ^TZmc{i
*/ hL/u5h%$
public class SortUtil { -|}?+W
public final static int INSERT = 1; 9rz$c, Y(
public final static int BUBBLE = 2; 'q:7PkN!p
public final static int SELECTION = 3; LRu*%3xx
public final static int SHELL = 4; yKj}l,i~8
public final static int QUICK = 5; <\$"U5"`
public final static int IMPROVED_QUICK = 6; 1K/ :
public final static int MERGE = 7; 1HNP@9ga
public final static int IMPROVED_MERGE = 8; F!hjtIkPj
public final static int HEAP = 9; fTR6]i;
6:%lxG
public static void sort(int[] data) { )ddJ\:
sort(data, IMPROVED_QUICK); R$l- 7YSt
} yN`hW&K
private static String[] name={ !YGHJwW:
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N5zWeFq@6
}; up['<Kt+a
L$O\fhO?
private static Sort[] impl=new Sort[]{ ^ICSh8C
new InsertSort(), h&L-G j
new BubbleSort(), )_C>hWvo_
new SelectionSort(), 8k:^( kByF
new ShellSort(), 0^V<,CAV
new QuickSort(), a"YVr'|
new ImprovedQuickSort(), 9jf9u0
new MergeSort(), V]J"v#!{
new ImprovedMergeSort(), 5L2j,]
new HeapSort() o>(<:^x9
}; .^=I&X/P
u(1m#xr8$
public static String toString(int algorithm){ dDl+
return name[algorithm-1]; 0|-}>>qb\
} @a]cI
3t+{~{Dj
public static void sort(int[] data, int algorithm) { M/.M~/~
impl[algorithm-1].sort(data); v4Ag~Evcx
} {:"<E?+
vzfMME17
public static interface Sort { ,m`&J?
public void sort(int[] data); \i,H1a
} GFPrK9T
q['D?)sy
public static void swap(int[] data, int i, int j) { ,_(=w.F
int temp = data; V2?{ebx`
data = data[j]; nkPlfH
data[j] = temp; T=pP
} Jxe5y3* (
} U3B&3K} ~