[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; /;l[I=VI
} .*Vkua
int i1=l; B`{mdjMy
int i2=mid+1; DtI$9`~
for(int cur=l;cur<=r;cur++){ >aG=T{
if(i1==mid+1) +AoP{x$Ia
data[cur]=temp[i2++]; PO o%^'(
else if(i2>r) rP'AJDuq
data[cur]=temp[i1++]; O9^T3~x[V
else if(temp[i1] data[cur]=temp[i1++]; d)tiO2W
else HTk\723Rdw
data[cur]=temp[i2++]; |9IC/C!HC
} )3%@9
} T@P!L
N*_"8LIfi_
} >b48>@~bY
8eJE>g1J
改进后的归并排序: ,q#2:b<E
#!})3_Qc(y
package org.rut.util.algorithm.support; ^=+e?F`:{
? %(spV
import org.rut.util.algorithm.SortUtil; }G'XkoI&
ubbnFE&PD
/** GoIQ>n
* @author treeroot NYB "jKMk
* @since 2006-2-2 . I==-|
* @version 1.0 Vb!O8xV4;+
*/ f*m[|0qI<X
public class ImprovedMergeSort implements SortUtil.Sort { /e1(? 20
Wp[9beI*M
private static final int THRESHOLD = 10; ar$*a>'?
_ym"m,,7?
/* zkexei4^<
* (non-Javadoc) !E0!-UpY
* ag8`O&+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aSL6zye ,
*/ $UvPo0{
public void sort(int[] data) { vtyx`F f
int[] temp=new int[data.length]; "^Rv#
mergeSort(data,temp,0,data.length-1); dJD(\a>r.u
} OlY$v@|
&= eYr{
private void mergeSort(int[] data, int[] temp, int l, int r) { 8(lR!!=q
int i, j, k; {^mKvc
int mid = (l + r) / 2; S6sq#kcH
if (l == r) >o/95xk2
return; e |V]
if ((mid - l) >= THRESHOLD) %tmp
mergeSort(data, temp, l, mid); x[i`S8D
else PeTA$Yl
insertSort(data, l, mid - l + 1); e2w&&B-
if ((r - mid) > THRESHOLD) EzpFOqJG
mergeSort(data, temp, mid + 1, r); |V|+lx'sc
else %3o`j<
insertSort(data, mid + 1, r - mid); =&vFVIhWcf
q \O Ou
for (i = l; i <= mid; i++) { !SxG(*u
temp = data; 6BAW
} pC(sS0J
for (j = 1; j <= r - mid; j++) { ;ME)Og
temp[r - j + 1] = data[j + mid]; y1pu R7
} .=c<>/ 0
int a = temp[l]; *Y6xvib9*
int b = temp[r]; I7(?;MpI
for (i = l, j = r, k = l; k <= r; k++) { Vrkf(E3_V
if (a < b) { , ZFE(
data[k] = temp[i++]; (= ;N{u
a = temp; R_N:#K.M
} else { )Gk`[*q ;
data[k] = temp[j--]; vmX"+sHz$]
b = temp[j]; wtH~-xSB|
} z|N3G E(.@
} rHz||jjU
} M 2q"dz
u:dx;*
/** d@ Ja}`
* @param data |E3X
* @param l ynwG\V
* @param i /*rhtrS)
*/ QHlU|dR)Ry
private void insertSort(int[] data, int start, int len) { #hw>tA6
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); _[h8P9YI4
} Z(GfK0vU
} W|5_$p
} w$fJ4+
} zpjqEEY;
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堆排序： o{WyQ&2N
F0lOlS
package org.rut.util.algorithm.support; F]+~x/!
j/!H$0PN
import org.rut.util.algorithm.SortUtil; q(IQa@$SR
@n+=vC.xO
/** ?cy4&]s
* @author treeroot @It>*B yB.
* @since 2006-2-2 #,NvO!j<4
* @version 1.0 #& ?g %'
*/ mUoIJ3fv_,
public class HeapSort implements SortUtil.Sort{ 5:.{oSy7n
=O$M_1lp
/* (non-Javadoc) kG0Yh2;#
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c&nh>oN
*/ p&b5% 4P
public void sort(int[] data) { PnYBy| yl
MaxHeap h=new MaxHeap(); H17-/|-;0!
h.init(data); .qv'6G
for(int i=0;i h.remove(); 2kh"8oQ
System.arraycopy(h.queue,1,data,0,data.length); m#7*:i&@Y
} }6u2*(TmD
Ea $aUORm
private static class MaxHeap{ (eWPis[
23]Y<->Eu<
void init(int[] data){ OFU/gaO~
this.queue=new int[data.length+1]; Rl~T$ Ey
for(int i=0;i queue[++size]=data; 60>.ul2
fixUp(size); Vu8,(A7D%O
} !wz/cM;
} ]d}0l6
9pKGr@&
private int size=0; jeUUa-zR3
Wr?'$:
private int[] queue; b;cMl'
E%N2k|%8d_
public int get() { <%?#AVU[
return queue[1]; o4y']JSN
} ~FU@wV^
d^E [|w;
public void remove() { j]rz]k
SortUtil.swap(queue,1,size--); uBrMk
fixDown(1); DGESba\2+
} R:aa+MX(1
file://fixdown V^s0fWa
private void fixDown(int k) { gb|Q%LS9R
int j; =n(3o$r(
while ((j = k << 1) <= size) { WYcA8X/
if (j < size %26amp;%26amp; queue[j] j++; 5e8AmY8;
if (queue[k]>queue[j]) file://不用交换 }28=
break; ,E )|y4
SortUtil.swap(queue,j,k); #KlCZ~s
k = j; [^YA=Khu
} eGL1
} c3%@Wj:fo
private void fixUp(int k) { "/{RhY<
while (k > 1) { NQHz<3S[
int j = k >> 1; 8jlLUG:g
if (queue[j]>queue[k]) yY).mxRN
break; 4'1m4Ugg
SortUtil.swap(queue,j,k); /b#l^x:j
k = j; Ta=s:trP
} @@G6p($
} /#NYi,<{X
Q n)d2-<
} $tqJ/:I
R\3VB NX.g
} K$ }a8rH
dq;|?ESP
SortUtil： xgu `Q`~
ENVk{QE!
package org.rut.util.algorithm; #18FA|
d~J-|yyT
import org.rut.util.algorithm.support.BubbleSort; OWp%v_y]
import org.rut.util.algorithm.support.HeapSort; !%(h2]MQ
import org.rut.util.algorithm.support.ImprovedMergeSort; *A'FC|\
import org.rut.util.algorithm.support.ImprovedQuickSort; R7jmv n
import org.rut.util.algorithm.support.InsertSort; Ga>uFb}W~
import org.rut.util.algorithm.support.MergeSort; K BE Ax3
import org.rut.util.algorithm.support.QuickSort; B;6]NCxD
import org.rut.util.algorithm.support.SelectionSort; 9LnN$e
import org.rut.util.algorithm.support.ShellSort; ;h=*!7:
k*rZ*sSp
/** `>(W"^
* @author treeroot y;cUl, :v
* @since 2006-2-2 zdl%iop3e
* @version 1.0 = {'pUU
*/ EI~"L$?
public class SortUtil { .jw}JJ
public final static int INSERT = 1; {]*x*aa\
public final static int BUBBLE = 2; rHge~nY<
public final static int SELECTION = 3; J@pb[OL,
public final static int SHELL = 4; (:V>Hjt
public final static int QUICK = 5; +ECDD'^!
public final static int IMPROVED_QUICK = 6; _Q%vK*n
public final static int MERGE = 7; ] Wy)
public final static int IMPROVED_MERGE = 8; Psura$:
public final static int HEAP = 9; u9woEe?
Jq.lT(E8D
public static void sort(int[] data) { $3T_.
sort(data, IMPROVED_QUICK); ,fDEz9-,
} `^JJ&)4iv
private static String[] name={ n"PJ,ao
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" [D"t~QMr
}; %=we`&
Z7rJ}VP
private static Sort[] impl=new Sort[]{ o{b=9-V
new InsertSort(), EJ}!F?o
new BubbleSort(), g>0XxjP4
new SelectionSort(), B$3 ?K
new ShellSort(), gJiK+&8I
new QuickSort(), -$VZtex
new ImprovedQuickSort(), dCe4u<so\
new MergeSort(), 5<pftTcZ
new ImprovedMergeSort(), kv,%(en]
new HeapSort() mP38T{
}; Jb)#fH$L
hf/2vt m
public static String toString(int algorithm){ *_Z#O,
return name[algorithm-1]; ,d+fDmm3
} WO4=Mte?
Zv_.na/^K
public static void sort(int[] data, int algorithm) { _-!sBK+F
impl[algorithm-1].sort(data); eivtH P
} Ma*y=d;,1
z{"2S="
public static interface Sort { lU^;Z6f
public void sort(int[] data); p9U?!L!y
} r=/;iH?UH
aJL^AG
public static void swap(int[] data, int i, int j) { AsS$C&^
int temp = data; 5 8-e^.
data = data[j]; f %lD08Sl
data[j] = temp; Sd/?&
} EpS(o>'
} jc[_I&Oc_