[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; U9p^?\-=
} %epK-q9[
int i1=l; W4(O2RU
int i2=mid+1; !#8=tO
for(int cur=l;cur<=r;cur++){ 3$ 1 z
if(i1==mid+1) uP[:P?,t
data[cur]=temp[i2++]; /I&b5Vp
else if(i2>r) \M`fkR,,'
data[cur]=temp[i1++]; tC -H2@
else if(temp[i1] data[cur]=temp[i1++]; C\dlQQ
else i<Be)Y-'
data[cur]=temp[i2++]; k|}S K9
} MhpR^VM'.
} p,w6D,h
0Ti>PR5M
} lCyp&b#(L
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改进后的归并排序: 8h2!8'
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package org.rut.util.algorithm.support; e?D,=A4mV"
%7?v='s=
import org.rut.util.algorithm.SortUtil; P&Q 5ZQb
jTx,5s-
/** qqYH}%0dz
* @author treeroot {9Op{bZ
* @since 2006-2-2 o^! Zt 9
* @version 1.0 f(E 'i>
*/ ~U~4QQV
public class ImprovedMergeSort implements SortUtil.Sort { !Jj=H()}
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private static final int THRESHOLD = 10; rkl/5z??
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/* a|\_'#
* (non-Javadoc) +:[dviyPt
* G?/1 F1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [J+K4o8L<A
*/ }r/L 9
public void sort(int[] data) { .n`MPx'
int[] temp=new int[data.length]; OX4+1@$tk
mergeSort(data,temp,0,data.length-1); N3H!ptn37
} !`='K +
3Pp*ID
private void mergeSort(int[] data, int[] temp, int l, int r) { Nu{RF
int i, j, k; 6#5@d^a
int mid = (l + r) / 2; q#PGcCtu
if (l == r) nx,67u/Pb
return; k>n^QHM
if ((mid - l) >= THRESHOLD) zT~ GBC-IX
mergeSort(data, temp, l, mid); t Q_}o[
else n@g[VR2t
insertSort(data, l, mid - l + 1); G$4lH>A&
if ((r - mid) > THRESHOLD) 9&'Mb[C`"
mergeSort(data, temp, mid + 1, r); AJ:@c7:eS
else NnSI=M
insertSort(data, mid + 1, r - mid); =W !m`
;wprHXjq
for (i = l; i <= mid; i++) { Ze Shn
temp = data; 5 |C;]pq
} 6aQ{EO-]'=
for (j = 1; j <= r - mid; j++) { r:Cad0xj;^
temp[r - j + 1] = data[j + mid]; ~rY<y%K
} 8gBqur{
int a = temp[l]; h/(9AO}t
int b = temp[r]; P!YT{}
for (i = l, j = r, k = l; k <= r; k++) { a/^YgrC\T
if (a < b) { 0#*\o1r\p
data[k] = temp[i++]; +bf%]
a = temp; a9jY^E'|n
} else { F<-Pbtw
data[k] = temp[j--]; Z@C D1+G
b = temp[j]; cB<0~&
} {Y'_QW1:2
} !8=uBS%
} /e{Oqhf[n
N{p2@_fnB
/** @1Zf&'/6
* @param data [V jd)%
* @param l l]v *h0!
* @param i }.b[az\T
*/ Ha C?,
private void insertSort(int[] data, int start, int len) { U;V. +onv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,$;CII v
} [Q 2t,tQx
} & vLX
} zRE7 w:
} o!\O)
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堆排序： H8-,gV
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package org.rut.util.algorithm.support; q75F^AvH
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import org.rut.util.algorithm.SortUtil; hU=J^Gi0
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/** XIp9=jhSR
* @author treeroot h;ShNU
* @since 2006-2-2 HK[sHB&
* @version 1.0 #!`zU4&2
*/ %ri4nKGS
public class HeapSort implements SortUtil.Sort{ ,-b{oS~u
KT g$^"\
/* (non-Javadoc) dIpt&nH&$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q]r!5&Z
*/ /t9w%Y
public void sort(int[] data) { \W(p)M
MaxHeap h=new MaxHeap(); f$Ap\(.
h.init(data); W#lvH=y
for(int i=0;i h.remove(); ynDx'Q*N'
System.arraycopy(h.queue,1,data,0,data.length); 3tm z2JIb
} wl{p,[]
VmUM_Q~
private static class MaxHeap{ "pWdz}!
5AjK7[<L
void init(int[] data){ OUdeQO?
this.queue=new int[data.length+1]; tm|lqa
for(int i=0;i queue[++size]=data; E%;'3Qykva
fixUp(size); Cir =(
} hx2C<;s4
} *xl7;s
mhVoz0%1X
private int size=0; 4vX]c
Q./lX:
private int[] queue; Hwc{%.%ae
(jm.vL&5j
public int get() { 5{u6qc4FW
return queue[1]; (Dar6>!
} r2](~&i2
y(]|jRo
public void remove() { 7IHD?pnZ
SortUtil.swap(queue,1,size--); )4`Ml*7x
fixDown(1); Qr<%rU^{.
} 4bxkp3~h;
file://fixdown dikWk
private void fixDown(int k) { =k*0O_
int j; 3'"M31iA
while ((j = k << 1) <= size) { %'t~e?d!
if (j < size %26amp;%26amp; queue[j] j++; qE`=^
if (queue[k]>queue[j]) file://不用交换 h/fCCfO,
break; ^kl9U+
SortUtil.swap(queue,j,k); n>E*g|a
k = j; BH-[q9pf
} 0`P]fL+&
} rq1kj 8%2
private void fixUp(int k) { KyyG8;G%
while (k > 1) { {\aSEE/'
int j = k >> 1; ob] lCX)
if (queue[j]>queue[k]) )T64(_TE
break; tRy D@}
SortUtil.swap(queue,j,k); Y1 P[^ws
k = j; =_'cG:=)
} ~^^ey17
} ?:?4rIZ<
qp W#!Vbx
} @:7gHRJ!
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} z/YMl3$l~
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SortUtil： tqQ0lv^J
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package org.rut.util.algorithm; &Bn; Vi
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import org.rut.util.algorithm.support.BubbleSort; DVhTb
import org.rut.util.algorithm.support.HeapSort; ` (D4gPW
import org.rut.util.algorithm.support.ImprovedMergeSort; ,z1!~gIal
import org.rut.util.algorithm.support.ImprovedQuickSort; m IzBK]@^
import org.rut.util.algorithm.support.InsertSort; 8sIrG
import org.rut.util.algorithm.support.MergeSort; s1vrzze
import org.rut.util.algorithm.support.QuickSort; w"v'dU^
import org.rut.util.algorithm.support.SelectionSort; <KwK tgzs
import org.rut.util.algorithm.support.ShellSort; grQnV' q
H\I!J@6g
/** Q H_W\W
* @author treeroot yb{Q,Dz
* @since 2006-2-2 =YGP%}_.p{
* @version 1.0 mY`]33??v
*/ Zva
public class SortUtil { e5ru:#P.p
public final static int INSERT = 1; ]zyX@=mM
public final static int BUBBLE = 2; hRr1#'&
public final static int SELECTION = 3; }E5#X R
public final static int SHELL = 4; =u8D!AxT
public final static int QUICK = 5; Iz)hz9k
public final static int IMPROVED_QUICK = 6; ;:Z=%R$wJ
public final static int MERGE = 7; ch>Vv"G>
public final static int IMPROVED_MERGE = 8; lmQ6X
public final static int HEAP = 9; h1XMx'}B
@vQa\|j
public static void sort(int[] data) { `xUG|
sort(data, IMPROVED_QUICK); _IL2-c8
} lKEX"KQ!
private static String[] name={ =x^l[>sz
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gKN}Of@^1
}; i7nL_N
ISS\uj63M
private static Sort[] impl=new Sort[]{ Znta#G0
new InsertSort(), %)axGbZG;
new BubbleSort(), [8@kxCq
new SelectionSort(), T^$g N|
new ShellSort(), *q*HGW5
new QuickSort(), MCeu0e^)
new ImprovedQuickSort(), gcg>Gjp
new MergeSort(), vJRnBq+y
new ImprovedMergeSort(), $(gGoL<
new HeapSort() 3@)obb
}; ;cI#S%uvpn
.Z=Ce!
public static String toString(int algorithm){ $_C+4[R?
return name[algorithm-1]; 5g``30:o
} 7]|zkjgI
Dz`k[mI
public static void sort(int[] data, int algorithm) { dTN$y\
impl[algorithm-1].sort(data); py{eX`(MS
} 0e+W/Tq
Wp5]Uk
public static interface Sort { FaFp_P?
public void sort(int[] data); rH_Jh}Y
} MZ|\S/
5"JU?e59M
public static void swap(int[] data, int i, int j) { hH%,!tSx
int temp = data; QsF4Dl
data = data[j]; y"^yYO
data[j] = temp; MO[kr2T
} q2e]3{l3
} HU &)