[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; EnMc9FN(y
} u9 *ic~Nh
int i1=l; G=Xas"|
int i2=mid+1; yp hd'Pu"
for(int cur=l;cur<=r;cur++){ JBV 06T_4o
if(i1==mid+1) G]-\$>5R
data[cur]=temp[i2++]; .F/l$4CQ
else if(i2>r) ieOw&
data[cur]=temp[i1++]; FIJ]`
else if(temp[i1] data[cur]=temp[i1++]; (h&=Na~
else ) [)1
data[cur]=temp[i2++]; SQ/}K8uZ
} R{B5{~m>W@
} U~|)=+%O
:p1_ij]ND
} 3;//o<
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改进后的归并排序: *EU1`q*
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package org.rut.util.algorithm.support; vN6)Szim
S>[&]
import org.rut.util.algorithm.SortUtil; 7*+tG7I @
JFRbWQ0
/** U d+6=Us{
* @author treeroot U,<?]h
* @since 2006-2-2 kCZ'p
* @version 1.0 Fe2iG-ec
*/ 8P%Jky&(
public class ImprovedMergeSort implements SortUtil.Sort { EBmkKiI;
L$]Y$yv
private static final int THRESHOLD = 10; w~AO;X*Ke"
SR4 mbQ:
/* j3o?B
* (non-Javadoc) /p|L.&`U
* !'bZ|j%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) m*AiP]Qu
*/ `b)i;m
public void sort(int[] data) { bz\nCfU
int[] temp=new int[data.length]; LD;! s
mergeSort(data,temp,0,data.length-1); 7U)w\A;~
} g s%[Cv
C9%A?'`
private void mergeSort(int[] data, int[] temp, int l, int r) { G Mg|#DV
int i, j, k; 5N#Sic M
int mid = (l + r) / 2; (]"`>,ray
if (l == r) vf!lhV-UG+
return; YQ-V^e6
if ((mid - l) >= THRESHOLD) S2V+%Z _J
mergeSort(data, temp, l, mid); *Fd(
else ZjgfkZAS
insertSort(data, l, mid - l + 1); r#mH[|@W~
if ((r - mid) > THRESHOLD) K &G
mergeSort(data, temp, mid + 1, r); #!jwn^yq
else a/~1CrYr
insertSort(data, mid + 1, r - mid); 2Gc0pBqx
RbEtNwG@c
for (i = l; i <= mid; i++) { 7] >z e
temp = data; P.Qz>c^-C
} )9{!=k
for (j = 1; j <= r - mid; j++) { D' h%.
temp[r - j + 1] = data[j + mid]; X$<CIZ
} a;G>56iw
int a = temp[l]; 70A* !v
int b = temp[r]; /6'5uP
for (i = l, j = r, k = l; k <= r; k++) { )4FW~o<i
if (a < b) { l=>FoJf!*<
data[k] = temp[i++]; X<:Zx#J?i
a = temp; 7!g4`@!5M
} else { V4?]NFK
data[k] = temp[j--]; U5;Y o+z
b = temp[j]; LV]F?O[K=
} p=dM2>
} %Xl(wvd
} NHD`c)Q
t|59/R
/** 97^)B4
* @param data E#yG}UWe
* @param l !h+VbZ
* @param i #PMi6q~Z
*/ Gr|102
private void insertSort(int[] data, int start, int len) { CuYSvW
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 9t{Iv({6p
} ghaO#kI
} 6M6r&,yRu
} \x~},!l
} T:VFyby\w
|EP=<-|
堆排序： bSk)GZyH\d
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package org.rut.util.algorithm.support; DP &*P/
~ll+/w\4
import org.rut.util.algorithm.SortUtil; ByW,YKMy
4u]>$?X1_
/** %H7H0%qW
* @author treeroot z?g\w6
* @since 2006-2-2 $+w-r#,
* @version 1.0 fsV_>5I6
*/ *|.-y->
public class HeapSort implements SortUtil.Sort{ a(K^/BT
NfXEW-
/* (non-Javadoc) oedLe9!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) e`t-:~'
*/ KqWt4{\8v`
public void sort(int[] data) { w4;1 ('
MaxHeap h=new MaxHeap(); b^&nr[DC
h.init(data); 2~!+EH
for(int i=0;i h.remove(); &&|c-mD+*
System.arraycopy(h.queue,1,data,0,data.length); QR[i9'`<
} I:o.%5)
^}<h_T?<_-
private static class MaxHeap{ *l8:%t\
t|cTl/i 4
void init(int[] data){ u\}"l2 r
this.queue=new int[data.length+1]; Xs$UpQo
for(int i=0;i queue[++size]=data; 0)9'x)l:
fixUp(size); pytF K)U
} aF:|MTC(~
} ? VHOh9|AT
cDLjjK7:
private int size=0; G>j4b}e
5c6?$v/
private int[] queue; ~cW,B}
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public int get() { E9v_6d[
return queue[1]; F@kd[>/[
} VK]sK e
s92SN F}g
public void remove() { 2sahb#e )
SortUtil.swap(queue,1,size--); .L))EB
fixDown(1); 9\a;75a
} W3 2]#M=
file://fixdown >Ef{e6
private void fixDown(int k) { vFl06N2
int j; ~Jx0#+z9V
while ((j = k << 1) <= size) { P^& =L&U
if (j < size %26amp;%26amp; queue[j] j++; Eh|v>Yew
if (queue[k]>queue[j]) file://不用交换 #@K %Mx
break; 9 az{j1
SortUtil.swap(queue,j,k); rCgoU xW`
k = j; \[W)[mH_
} yDe#,|-p
} *BAR`+;U
private void fixUp(int k) { b&E9xD/;r
while (k > 1) { NKE,}^C
int j = k >> 1; N9gbj%+
if (queue[j]>queue[k]) ynU20g
break; GilmJ2<
SortUtil.swap(queue,j,k); Kz2s{y~?
k = j; s|o+ Im
} 4~mmP.c
} ^Qa!{9o[
0iTh |K0
} qfl#ki`,
`w#p8vR
} 31k2X81;a
Tt\G y
SortUtil： y8CH=U[
[X\~J &kD
package org.rut.util.algorithm; jP"l5
LV!<vakCK
import org.rut.util.algorithm.support.BubbleSort; HMPb%'U~
import org.rut.util.algorithm.support.HeapSort; DNy 6Kw
import org.rut.util.algorithm.support.ImprovedMergeSort; vZ/Bzy@|
import org.rut.util.algorithm.support.ImprovedQuickSort; a?ux
import org.rut.util.algorithm.support.InsertSort; >`=<(8bu
import org.rut.util.algorithm.support.MergeSort; e)A-.SRiO$
import org.rut.util.algorithm.support.QuickSort; RGV}c#
import org.rut.util.algorithm.support.SelectionSort; xty)*$C>
import org.rut.util.algorithm.support.ShellSort; w4(g]9^Q
I/ V`@*/+
/** ;FO( mL(
* @author treeroot N Obw/9JO
* @since 2006-2-2 DRuG5|{I:
* @version 1.0 YK6zN>M}E
*/ XX[CTh?O%
public class SortUtil { ERz{, >G?
public final static int INSERT = 1; X>4qL'b:z
public final static int BUBBLE = 2; hmM2c15T5
public final static int SELECTION = 3; :~%{
public final static int SHELL = 4; m9 D'yXZ
public final static int QUICK = 5; ]c~W$h+F
public final static int IMPROVED_QUICK = 6; ,AEaW
public final static int MERGE = 7; Auk#pO#
public final static int IMPROVED_MERGE = 8; d@e2+3<
public final static int HEAP = 9; 5!*@gn
Z[?zaQ$
public static void sort(int[] data) { 1&#qq*{
sort(data, IMPROVED_QUICK); 1?,1EYT"
} -wrVhCd~g]
private static String[] name={ O6Mxp-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Dwg_#GSr
}; \:D"#s%x
u;3wg`e
private static Sort[] impl=new Sort[]{ )0N^rw kW
new InsertSort(), A#KfG1K>
new BubbleSort(), W~qVZ(G*U
new SelectionSort(), \zM3{{mV/
new ShellSort(), ds;c\x
new QuickSort(), /YHAU5N/}
new ImprovedQuickSort(), VL2+"<
new MergeSort(), ^&Wa? m.
new ImprovedMergeSort(), O#72h]
new HeapSort() iTIYq0u|#R
}; E2u9>m4_J
1yV+~)by3
public static String toString(int algorithm){ pUD(5v*0R
return name[algorithm-1]; f S-PM3
} iM(Q-%HP_
r%412#
public static void sort(int[] data, int algorithm) { <tT.m[qg
impl[algorithm-1].sort(data); fF]w[lLDv
} /lDei}
@M&qH[tK-A
public static interface Sort { C q)Cwc[H
public void sort(int[] data); 4c9a"v
} _(:<l YaY
6'45c1e
public static void swap(int[] data, int i, int j) { WO!'("
int temp = data; iph}!3f
data = data[j]; 8KMo!p\i
data[j] = temp; t+Au6/Dx?
} |*n B2
} ,Vfjt=6]}