[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; A=X2zm>9
} {V& 2k9*
int i1=l; Up|\&2_
int i2=mid+1; ZB-+bY
for(int cur=l;cur<=r;cur++){ -"L)<J@gQ?
if(i1==mid+1) D7Y5q*F
data[cur]=temp[i2++]; <&'Ye[k
else if(i2>r) X8T7(w<0%f
data[cur]=temp[i1++]; R#Z1+&='
else if(temp[i1] data[cur]=temp[i1++]; Nkfu k
else a$p2I+lX
data[cur]=temp[i2++]; /f!_dJ^
} H!dUQ
} MxiU-
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} dvUBuY^[
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改进后的归并排序: 1\d$2N"
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package org.rut.util.algorithm.support; [0GM!3YJ7
l'~]8Wo1
import org.rut.util.algorithm.SortUtil; |=.z0{A7H
<DS+"#
/** ^iJMUV|
* @author treeroot SU, t,i
* @since 2006-2-2 7pNTCZY|
* @version 1.0 ?i4}[q
*/ LkFXUt?
public class ImprovedMergeSort implements SortUtil.Sort { "AjtNL5
;S+c<MSl
private static final int THRESHOLD = 10; `~( P
kmM4KP#&|
/* 4%WV)lt
* (non-Javadoc) Fz+0h"
* ;K?fAspSH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) U5mec167
*/ 0|X!Uw-Q%_
public void sort(int[] data) { 2tvMa%1^
int[] temp=new int[data.length]; ?MhRdY
mergeSort(data,temp,0,data.length-1); sY,!Ir`/`
} ;_0)f
pt8X.f,iA
private void mergeSort(int[] data, int[] temp, int l, int r) { ~B%EvG7:n
int i, j, k; :>lica_
int mid = (l + r) / 2; v>Il#
if (l == r) Y_`D5c:
return; `$`:PT\Zv4
if ((mid - l) >= THRESHOLD) {+[~;ISL
mergeSort(data, temp, l, mid); %+$P<Rw7
else xmtbSRgK9
insertSort(data, l, mid - l + 1); ' U(v
if ((r - mid) > THRESHOLD) )61CrQiY
mergeSort(data, temp, mid + 1, r); ~4Is
else dJ`Fvj
insertSort(data, mid + 1, r - mid); {Ny\9r
&)Z8Qu
for (i = l; i <= mid; i++) { 1Qf21oN{
temp = data; k>{i_`*
} uVqJl{e\
for (j = 1; j <= r - mid; j++) { ovCk:Vz
temp[r - j + 1] = data[j + mid]; bIizh8d?
} > 3JU
int a = temp[l]; *Kt7"J
int b = temp[r]; uqZLlP#&#
for (i = l, j = r, k = l; k <= r; k++) { bl\44VK2'
if (a < b) { $X5~9s1Wl
data[k] = temp[i++]; 8aGZ% UI
a = temp; MAR kTxzi
} else { l1c&a[M)
data[k] = temp[j--]; ,$3
b = temp[j]; u*Oz1~
} c%)uG _
} [p@NzS/
} 4:cbasy
mU_?}}aK,
/** QN-n9f8
* @param data CzzG
* @param l +nd'Uf
* @param i lf|e8kU\f
*/ oO @6c%
private void insertSort(int[] data, int start, int len) { 'KQ]7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); W<2%J)N<
} uYL6g:]+ZC
} )F? 57eh
} P0Na<)\'Y!
} !N,Z3p>Q
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堆排序： wRPBJ-C)
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package org.rut.util.algorithm.support; *ILS/`mdav
q30WUO;
import org.rut.util.algorithm.SortUtil; T-&CAD3 ,O
~N[hY1}X[
/** CpS'2@6
* @author treeroot Beqhe\{
* @since 2006-2-2 6Epns s
* @version 1.0 =[{Pw8['
*/ q22cp&gmX
public class HeapSort implements SortUtil.Sort{ 5?;'26iC
+nuv?QB/
/* (non-Javadoc) {r&M
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) w^|,[G^}H
*/ CR934TE+
public void sort(int[] data) { (%#d._j>fZ
MaxHeap h=new MaxHeap(); ZX-9BJ`Q
h.init(data); jT::o
for(int i=0;i h.remove(); (6+6]`c$
System.arraycopy(h.queue,1,data,0,data.length); 8fM}UZI
} @hzQk~Gdi
`4}!+fXQ
private static class MaxHeap{ Ynz^M{9)K
10#!{].#x
void init(int[] data){ Y1k/ngH
this.queue=new int[data.length+1]; {]<D"x;
for(int i=0;i queue[++size]=data; GJO/']k
fixUp(size); 8.pz?{**T
} Wlg(z%
} 1AE/ILGo
+{hxEDz
private int size=0; y^@%Xrs
5.?O PK6
private int[] queue; Y ga}8DU
tEN]0`
public int get() { o95O!5 hl
return queue[1]; e!4akKw4wD
} a+{g~/z;,Q
,xD{A}}V
public void remove() { jLQjv
SortUtil.swap(queue,1,size--); e_1mO 5z
fixDown(1); eU%5CVH.v
} u/.srK!K
file://fixdown qh7o;x~,
private void fixDown(int k) { "[[fQpe4@
int j; e982IP
while ((j = k << 1) <= size) { nrt0[E-&~
if (j < size %26amp;%26amp; queue[j] j++; l42m81x"
if (queue[k]>queue[j]) file://不用交换 e<9nt [
break; o B6"D
SortUtil.swap(queue,j,k); /#:RYM'Tu
k = j; ?G?=,tV
} 2M&4]d
} K6Gc)jp:b
private void fixUp(int k) { ,6M-xSDs
while (k > 1) { ,j_{IL690
int j = k >> 1; &us8,x6yg
if (queue[j]>queue[k]) l m
break; e-e{-pB6
SortUtil.swap(queue,j,k); 5)nv
k = j; }qKeX4\-
} )D[ypuM&
} BB%(!O4Dl
(Wx)YI
} 9d{W/t?NH
=k$d8g ez
} Q%eBm_r;
^1~/FU
SortUtil： /yykOvUO
'|d (<.[
package org.rut.util.algorithm; `%ENGB|
O"#`i{^?2
import org.rut.util.algorithm.support.BubbleSort; Q?"[zX1
import org.rut.util.algorithm.support.HeapSort; /6q/`vx@
import org.rut.util.algorithm.support.ImprovedMergeSort; E`?BaCrG~
import org.rut.util.algorithm.support.ImprovedQuickSort; cEqh|Q
import org.rut.util.algorithm.support.InsertSort; P);Xke
import org.rut.util.algorithm.support.MergeSort; )K?GAj]Pq
import org.rut.util.algorithm.support.QuickSort; ! 4oIx`
import org.rut.util.algorithm.support.SelectionSort; 5t<]|-i!
import org.rut.util.algorithm.support.ShellSort; #>- rKv.A
dt \O7Rjw8
/** <oXsn.'\
* @author treeroot i3%~Gc63
* @since 2006-2-2 ~qqtFjlG^
* @version 1.0 J.nVEqLZ
*/ xlwsZm{V
public class SortUtil { 'I<j`)4`d
public final static int INSERT = 1; L3GJq{t
public final static int BUBBLE = 2; 'D/AL\1{p(
public final static int SELECTION = 3; I!(yU
public final static int SHELL = 4; ; zvnDox
public final static int QUICK = 5; /y!Vs`PZ!
public final static int IMPROVED_QUICK = 6; ,Tz ,)rY
public final static int MERGE = 7; A0]o/IBz
public final static int IMPROVED_MERGE = 8; Tb)x8-0
public final static int HEAP = 9; OK)0no=OAK
X,fTzkGj
public static void sort(int[] data) { p|FX_4RjX
sort(data, IMPROVED_QUICK); O#EBR<CuK
} ZGbZu
private static String[] name={ %om7h$D=`
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E1C8yIF
}; >WDpBn:
u!-eP7;7
private static Sort[] impl=new Sort[]{ 0*AlLwO
new InsertSort(), ua[\npz5
new BubbleSort(), !<LS4s;
new SelectionSort(), X<QE]RZ
new ShellSort(), J6%op{7/
new QuickSort(), 2"MI8EK
new ImprovedQuickSort(), 8;'n.SC{
new MergeSort(), UA9LI<Y
new ImprovedMergeSort(), K$]QzPXS
new HeapSort() zh.c_>jS
}; vXvV5Oq
.Ep3~9TBW
public static String toString(int algorithm){ -J30g\
return name[algorithm-1]; FGH>;H@
} Jzdc'3dq
6~8 RFf"
public static void sort(int[] data, int algorithm) { *]eZ Y
impl[algorithm-1].sort(data); q kKABow
} \l2 s^7G_
y2U:( H:l!
public static interface Sort { ?qbp
public void sort(int[] data); ^~aSrREo
} |pgkl`
:L[6a>"neE
public static void swap(int[] data, int i, int j) { I;v`o{
int temp = data; OZ" <V^"`
data = data[j]; Imwx~eo
data[j] = temp; 8`t%QhE2
} 0?7uqS#L
} Vj]kJ,j\y