[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; wr{03mQHxp
} 48dIh\TH"
int i1=l; Kk+IUs
int i2=mid+1; ;ZZ%(P=-
for(int cur=l;cur<=r;cur++){ hV|pH)Nu{
if(i1==mid+1) Bv_C *vW
data[cur]=temp[i2++]; Y)^qF)v,d
else if(i2>r) RNGTSz
data[cur]=temp[i1++]; XzI c<81Z
else if(temp[i1] data[cur]=temp[i1++]; rB|Mp!g%@
else meunAEe
data[cur]=temp[i2++]; tz0@csXV
} 'WK}T)o
} Qb}7lm{r
S!Ue+jW
} {|?OKCG{
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改进后的归并排序: BE. v+'c"
i0DYdUj
package org.rut.util.algorithm.support; wjh[}rTV*
p6m](Jg
import org.rut.util.algorithm.SortUtil; fD+'{ivN4
^ZnlWZ@r
/** vw=OGjT_>m
* @author treeroot {wMw$Fvf
* @since 2006-2-2 'W>Bz,M6yo
* @version 1.0 6*,'A|t?y
*/ (+7gS_c
public class ImprovedMergeSort implements SortUtil.Sort { |S48xsFvq
eUlF4l<]
private static final int THRESHOLD = 10; w"d~R
"&?F6Pi
/* 3Tze`Q 9
* (non-Javadoc) y~'F9E!i
* , f9V`Pz)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) wy6>^_z
*/ 3qOq:ZkQ
public void sort(int[] data) { (7BG~T
int[] temp=new int[data.length]; qS<a5`EA
mergeSort(data,temp,0,data.length-1); fP>_P#gZ
} 0VC8'6S_k
?8[,0l:|
private void mergeSort(int[] data, int[] temp, int l, int r) { +7n;Bsk _
int i, j, k; jqq96hP,
int mid = (l + r) / 2; 4zuM?Dp
if (l == r) YW55iyM
return; lJ.:5$2H
if ((mid - l) >= THRESHOLD) 'Lu7cb^
mergeSort(data, temp, l, mid); <>/0;J1<
else RM\it"g
insertSort(data, l, mid - l + 1); "jBrPCB 8
if ((r - mid) > THRESHOLD) 'qcLK>E
mergeSort(data, temp, mid + 1, r); nEu,1
else !|6M,Rk_
insertSort(data, mid + 1, r - mid); yO Ed8
MGpP'G:v
for (i = l; i <= mid; i++) { D /ysS$!{
temp = data; FEj{/
} 0[ MQp"z
for (j = 1; j <= r - mid; j++) { ({ 'I;]AQ
temp[r - j + 1] = data[j + mid]; {3=M-U~r
} am.}2QZU
int a = temp[l]; 19-|.9m(
int b = temp[r]; (|%YyRaX
for (i = l, j = r, k = l; k <= r; k++) { =Q|_v}
if (a < b) { u&Q2/Y
data[k] = temp[i++]; -w nlJi1f
a = temp; v`3q0,,
} else { ufF$7@(+
data[k] = temp[j--]; $YuVM
b = temp[j]; DM"nxTVre
} >zcR ?PPs
} {n9]ej^
} SXX6EIJr|
/V@~Vlww
/** Ny|2Fcs
* @param data \| qr&(PG
* @param l u1K;{>4lx
* @param i R3+y*<<e
*/ sLiKcR8^
private void insertSort(int[] data, int start, int len) { 5dc24GB>_
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); :SFcnYv0
} UjLZ!-}
} RbB y8ZVM
} Zp'c>ty=
} ;M{@|z[Nv
j2O?]M
堆排序： 9x;CJhX
!14aw9Q
package org.rut.util.algorithm.support; nXHU|5.I
Lc,`
import org.rut.util.algorithm.SortUtil; f9v%k'T[
={&}8VA
/** sOzmw^7
* @author treeroot *m2{6N_
* @since 2006-2-2 9pAklD4
* @version 1.0 r #H(kJu,
*/ 5J!ncLNm{
public class HeapSort implements SortUtil.Sort{ 3[8F:I0UL
|"V]$s$ c
/* (non-Javadoc) s5{N+O)~S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Fw,'a
*/ g/H:`J
public void sort(int[] data) { <vS J<WY
MaxHeap h=new MaxHeap(); b+/XVEsr
h.init(data); -I."= c%
for(int i=0;i h.remove(); N"-</kzV
System.arraycopy(h.queue,1,data,0,data.length); !GJnYDN
} y\-f{I
Hkq""'Mx+w
private static class MaxHeap{ ap|7./yg
Qw>ftle
void init(int[] data){ T=lir%q
this.queue=new int[data.length+1]; |+Gv)Rvp
for(int i=0;i queue[++size]=data; >q+o MrU
fixUp(size); &k'J5YHm8H
} >y&Db
} f-6hcd@Ca
E`vCYhf{
private int size=0; d+FS
,_HSvs7-
private int[] queue; -h=K]Y{`
VQSwRL3B=
public int get() { 9 Yv;Dom
return queue[1]; uJ:'<dJ
} OcR6\t'
r!Ujy .R
public void remove() { 6ww4ZH?j
SortUtil.swap(queue,1,size--); k.Tu#7
fixDown(1); P%#WeQ+
} Yphru"\$
file://fixdown 1rs`|iX5
private void fixDown(int k) { nNbOq[
int j; RmXC ^VQ
while ((j = k << 1) <= size) { "#7~}ZB
if (j < size %26amp;%26amp; queue[j] j++; E]G#"EV!Y
if (queue[k]>queue[j]) file://不用交换 ?UD2}D[M
break; k-5Enbkr
SortUtil.swap(queue,j,k); 0*?/s\>PS;
k = j; EW;R^?Z
} a.P7O!2Lp
} }T<[JXh=J
private void fixUp(int k) { )b<-=VR
while (k > 1) { z[xi
int j = k >> 1; MQD%m ;[s
if (queue[j]>queue[k]) i3C5"\y
break; "Mt4~vy
SortUtil.swap(queue,j,k); w!$|IC
k = j; K$>C*?R
} H.\gLIr
} C>%2'S^.b
8r7}6
} u=a5Z4N'
(Uo:WyVj|F
} fiDwa ;,
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SortUtil： #vk-zx*v7=
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package org.rut.util.algorithm; tvNh@it:F
CiE
import org.rut.util.algorithm.support.BubbleSort; h-0sDt pR
import org.rut.util.algorithm.support.HeapSort; CD$0Z
import org.rut.util.algorithm.support.ImprovedMergeSort; 9uk}r; %9
import org.rut.util.algorithm.support.ImprovedQuickSort; FD?!bI4
import org.rut.util.algorithm.support.InsertSort; jJ^p ?
import org.rut.util.algorithm.support.MergeSort; VCOz?Y*
import org.rut.util.algorithm.support.QuickSort; y*ae 5=6(
import org.rut.util.algorithm.support.SelectionSort; LKtug>Me
import org.rut.util.algorithm.support.ShellSort; ~jK'n4
T;6 VI|\
/** /cn=8%!N
* @author treeroot z[kz[
* @since 2006-2-2 sZ`C "1cX
* @version 1.0 >)g`;iO
*/ b$/TfpNdo
public class SortUtil { Cx>iSx
public final static int INSERT = 1; :f^=~#!
public final static int BUBBLE = 2; 9f ,$JjX[
public final static int SELECTION = 3; 2=H3yEJq
public final static int SHELL = 4; f.?p"~!
public final static int QUICK = 5; N?!]^jI,
public final static int IMPROVED_QUICK = 6; %'2DEt??
public final static int MERGE = 7; j{)_&|^{
public final static int IMPROVED_MERGE = 8; #X&`gDW
public final static int HEAP = 9; y,$kU1yH7
fmH"&>Loc
public static void sort(int[] data) { CXqU<a&
sort(data, IMPROVED_QUICK); <gU^#gsGra
} X"V,3gDG
private static String[] name={ ImJ2tz6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" P,xI3U< q
}; T7f>u}T
9IFK4>&O6
private static Sort[] impl=new Sort[]{ e1'<;;; L
new InsertSort(), nSxFz!
new BubbleSort(), >kK;IF9h
new SelectionSort(), \!HGkmd
new ShellSort(), /[f9Z:>V
new QuickSort(), L"Y_:l3"7
new ImprovedQuickSort(), 56i9V9{2
new MergeSort(), s7RAui
new ImprovedMergeSort(), H38ODWO3
new HeapSort() }S{#DgZ@X
}; RhVQVjc
8BUPvaP<[
public static String toString(int algorithm){ m9My
return name[algorithm-1]; ${"+bWG2G!
} Y.M^tH:
zyNg?_SM
public static void sort(int[] data, int algorithm) { N*.JQvbnr
impl[algorithm-1].sort(data); zZ3Ko3L%g_
} V+7x_>!&)
GC(:}e|
public static interface Sort { |G.|ocj;
public void sort(int[] data); BElVkb
} CB(Qy9C%h[
YXCfP~i
public static void swap(int[] data, int i, int j) { Y\!* c=@k
int temp = data; =,B44:`r
data = data[j]; gC-3ghmgS
data[j] = temp; 6onFf* m!x
} -h&AO\*^W
} >;Er[Rywr