[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; e;5Lv9?C8
} '>Y 2lqa
int i1=l; J#DcT@
int i2=mid+1; 8!GLw-kb
for(int cur=l;cur<=r;cur++){ Bedjw =B
if(i1==mid+1) WtfOE@h
data[cur]=temp[i2++]; rb'GveW[
else if(i2>r) t`,IW{
data[cur]=temp[i1++]; 1qe^rz|
else if(temp[i1] data[cur]=temp[i1++]; p8dn-4
else Y0\\(0j64
data[cur]=temp[i2++]; }>~>5jc/Pg
} v|(b,J3
} ~x"79=!W
~!F4JRf
} aX)./
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改进后的归并排序: )K>@$6H+2
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package org.rut.util.algorithm.support; l6c%_<P|
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import org.rut.util.algorithm.SortUtil; &vX!7Y
[=6~"!P}
/** q)ql]iH
* @author treeroot ~hslLUE
* @since 2006-2-2 m8j-lNu
* @version 1.0 H#6^-6;/
*/ .Pes{uHg
public class ImprovedMergeSort implements SortUtil.Sort { oz6+rM6MY
i:M*L< +
private static final int THRESHOLD = 10; .00=U;H%`
Jav2A6a
/* RIEv*2_O
* (non-Javadoc) 1bZiPG{
* |cGeL[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #S%Y;ilq
*/ vj&5`
public void sort(int[] data) { 4t Nvq
int[] temp=new int[data.length]; h+~df(S.
mergeSort(data,temp,0,data.length-1); :n9xH
} \41)0,sEy
E(!6n= qR
private void mergeSort(int[] data, int[] temp, int l, int r) { (}1v^~FXj
int i, j, k; `m3QT3B
int mid = (l + r) / 2; +^DRto=
if (l == r) +1Rrkok
return; w;@25= |
if ((mid - l) >= THRESHOLD) /rxltF3
mergeSort(data, temp, l, mid); ZoON5P>
else cia-OVX
insertSort(data, l, mid - l + 1); qD;v/,?
if ((r - mid) > THRESHOLD) ,r 2VP\hLh
mergeSort(data, temp, mid + 1, r); V.Ba''E7
else ]vQ?]d?>a
insertSort(data, mid + 1, r - mid); $7n#\h
(vAv^A*i}
for (i = l; i <= mid; i++) { [s{r$!Gl
temp = data; s"',370
} `}~)1'(#/
for (j = 1; j <= r - mid; j++) { fb"J Bc}X
temp[r - j + 1] = data[j + mid]; 6~F#F)C'
} c Z6p^
int a = temp[l]; P%+or*
int b = temp[r]; Wda\a.bXT
for (i = l, j = r, k = l; k <= r; k++) { w"a 9'r
if (a < b) { L;S*.Ol>
data[k] = temp[i++]; HIX=MprL<
a = temp; *$Lz2 ]
} else { Z-t}6c'Kg
data[k] = temp[j--]; K@jSr*\'
b = temp[j]; w,![;wG
} df>kEvU5.^
} WiNr866nB
} J[!x%8m
i6F:C &.
/** 1rv$?=Z
* @param data ,.oa,sku
* @param l r'd:SaU+
* @param i <,@H;|mZ
*/ q)?p$\
private void insertSort(int[] data, int start, int len) { A3"1D
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 0n*rs=\VG
} 'Gl;Ir^
} ]D{c4)\7C|
} gj[ >p=Wn
} DhWWN>I
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堆排序： U+.PuC[3
q8?=*1g
package org.rut.util.algorithm.support; C!7U<rI
,Um5S6 Z
import org.rut.util.algorithm.SortUtil; $-$5ta{s
m|[\F#+C
/** p;qRm} 0}
* @author treeroot (Bt;DM#>
* @since 2006-2-2 HZDk <aU/!
* @version 1.0 6%ZHP?
*/ n5bXQ
public class HeapSort implements SortUtil.Sort{ *MYt:ms
N 8:"&WM
/* (non-Javadoc) X2\E9hJg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) r7Nu>[r5
*/ &<gUFcw7Ui
public void sort(int[] data) { BgJkrv7~
MaxHeap h=new MaxHeap(); :%/\1$3P
h.init(data); oMh~5 W
for(int i=0;i h.remove(); e1%rVQ(v
System.arraycopy(h.queue,1,data,0,data.length); Job/@> ;
} M8 iEVJ
>.J'L5 x$
private static class MaxHeap{ 8?e
|`w$|pm=
void init(int[] data){ 09R,'QJ|
this.queue=new int[data.length+1]; Lzh9DYU6
for(int i=0;i queue[++size]=data; <ZigCo w
fixUp(size); h'B9|Cm
} _Fy4DVCg
} #04{(G|~+E
,'FD}yw4v
private int size=0; $Q8P@L)[
k(zs>kiP
private int[] queue; GhqgRzX
*-9#/Cp
public int get() { T$H2'tK|
return queue[1]; tgO+*q5B
} cwu$TP A>
L3B8IDq
public void remove() { 0SJ{@*
SortUtil.swap(queue,1,size--); 7'_nc!ME
fixDown(1); Sdgb#?MR|
} %S{o5txo
file://fixdown nHSTeFI?
private void fixDown(int k) { `6rrXU6|
int j; .r~'(g{qt
while ((j = k << 1) <= size) { TT|-aS0l(u
if (j < size %26amp;%26amp; queue[j] j++; ob0~VEH-
if (queue[k]>queue[j]) file://不用交换 7 ,$axvLw
break; R `;o!B}[
SortUtil.swap(queue,j,k); H \r`7
k = j; -&trk
} -"F0eV+y
} 8dc538:q}
private void fixUp(int k) { _kh>Z
while (k > 1) { BiA>QQ
int j = k >> 1; De;,=BSp
if (queue[j]>queue[k]) (tJ91SBl
break; Qn*6D
SortUtil.swap(queue,j,k); G-2EQ.
k = j; DZJeup?Z
} (F_w>w.h
} DeA@0HOxh
}g}6qCv7
} 3nwz<P
0[lS(K
} ?^U c=
BApa^j\?
SortUtil： ]X*YAPv
9^oo-,Su_
package org.rut.util.algorithm; /[0F6
gC0;2
import org.rut.util.algorithm.support.BubbleSort; =Wj{]&`
import org.rut.util.algorithm.support.HeapSort; O-Dc[t%
import org.rut.util.algorithm.support.ImprovedMergeSort; gyC^K3}
import org.rut.util.algorithm.support.ImprovedQuickSort; HH7[tGF
import org.rut.util.algorithm.support.InsertSort; <R>Q4&we(
import org.rut.util.algorithm.support.MergeSort; NvcHv7,
import org.rut.util.algorithm.support.QuickSort; 9KXym }
import org.rut.util.algorithm.support.SelectionSort; QS\Uq(Ja\
import org.rut.util.algorithm.support.ShellSort; P2>:p%Z
zgK;4 22$m
/** Pfm*<,'x"[
* @author treeroot )eECOfmnZ
* @since 2006-2-2 0X.TF
* @version 1.0 +hpSxdAz4
*/ _ ~|Q4AJ
public class SortUtil { {-Yee[d<?
public final static int INSERT = 1; <p09oZ{6
public final static int BUBBLE = 2; [1<(VyJ}ye
public final static int SELECTION = 3; .M8=^,h^K
public final static int SHELL = 4; &%6NQWW
public final static int QUICK = 5; ?C}sR:K/
public final static int IMPROVED_QUICK = 6; E$w#+.QP
public final static int MERGE = 7; HQl~Dh0DJ
public final static int IMPROVED_MERGE = 8; $1~c_<DN
public final static int HEAP = 9; M=W 4:H,gx
XYts8}y5
public static void sort(int[] data) { vuZf#\zh}
sort(data, IMPROVED_QUICK); k9l^6#<?
} w3d34*0$
private static String[] name={ U3/8A:$y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !\ZcOk2
}; $}db /hY*
zLL)VFCJW
private static Sort[] impl=new Sort[]{ |<1M&\oaQ'
new InsertSort(), Y3<b~!f
new BubbleSort(), Y!M~#oqio
new SelectionSort(), 6i| ~7md,
new ShellSort(), /,X7.t_-
new QuickSort(), V;k#})_-
new ImprovedQuickSort(), LaclC]yLU
new MergeSort(), l:)S 3
new ImprovedMergeSort(), O~atNrHD
new HeapSort() >4~#%&
}; pUGN!3
" <Qm -
public static String toString(int algorithm){ G~(&3
return name[algorithm-1]; aV#h5s
} _\UIc;3Gl
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public static void sort(int[] data, int algorithm) { SetX#e?q~
impl[algorithm-1].sort(data); p.5e: i^LJ
} =6fB*bNk]
RbKwO} z$q
public static interface Sort { bf(+ldq
public void sort(int[] data); R1Yqz $#
} 94y9W#
o<nS_x
public static void swap(int[] data, int i, int j) { &1l~&,,
int temp = data; <cj}:H *
data = data[j]; B2Z0
data[j] = temp; AJdp6@O+
} a(f(R&-:$Y
} ~XKZXGw