[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; v=15pW
} G<9UL*HU
int i1=l; \(Uw.ri
int i2=mid+1; f.ku v"
for(int cur=l;cur<=r;cur++){ D&q-L[tA@
if(i1==mid+1) Q70LQCms
data[cur]=temp[i2++]; /PbN!r<1
else if(i2>r) #Jt9U1WbF
data[cur]=temp[i1++]; YNCQPN\v`1
else if(temp[i1] data[cur]=temp[i1++]; s^Lg*t3I
else 1*aw~nY0
data[cur]=temp[i2++]; w8M,35b
} a=*&OW
} sqw^Hwy=!2
@Y":DHF5q
} '&{`^l/MH
D~W1["[
改进后的归并排序: B>, O@og
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package org.rut.util.algorithm.support; ,B]kX/W
Y#Pl)sRr
import org.rut.util.algorithm.SortUtil; 1PLxc)LsG
Q C?*O?~#
/** QGE)Xn#_bN
* @author treeroot {U?UM
* @since 2006-2-2 6j9P`#Lt
* @version 1.0 B\BxF6 y
*/ 6|*em4
public class ImprovedMergeSort implements SortUtil.Sort { sV{M#UF2
O4xV "\
private static final int THRESHOLD = 10; '(M8D5?N-
__jFSa`at
/* c%,~1l
* (non-Javadoc) YGb&mD
* C"w>U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p:]kH
*/ V<f76U)
public void sort(int[] data) { %j9'HtjEa
int[] temp=new int[data.length]; s UX%{|T_
mergeSort(data,temp,0,data.length-1); /8 /2#`3R
} F6 ?4E"d
ooa>~!91P
private void mergeSort(int[] data, int[] temp, int l, int r) { A i`
int i, j, k; 67zCil
int mid = (l + r) / 2; }Xv2I$J
if (l == r) qF!oP
return; afEhC0j
if ((mid - l) >= THRESHOLD) nRKh|B)
mergeSort(data, temp, l, mid); h"<-^=b
else Ys|n9pW
insertSort(data, l, mid - l + 1); '5j$wr zt
if ((r - mid) > THRESHOLD) >gNVL (
mergeSort(data, temp, mid + 1, r); #P8R
else ~4YU
insertSort(data, mid + 1, r - mid); Zi$v-b*<
G-?y;V 1
for (i = l; i <= mid; i++) { $J8?!Xg
temp = data; f>d aK9$(
} g~EJja;
for (j = 1; j <= r - mid; j++) { P9j[ NEV
temp[r - j + 1] = data[j + mid]; R{zAs?j
} $`L!2
int a = temp[l]; "PO>@tY
int b = temp[r]; iXl6XwWT%8
for (i = l, j = r, k = l; k <= r; k++) { {ir8n731p
if (a < b) { >U/m/H'
data[k] = temp[i++]; RL=
a = temp; 1an?/j,
} else { (<RZZ{m
data[k] = temp[j--]; mx`C6G5
b = temp[j]; zqqu7.`
} ?2D1gjr
} I"/p^@IX
} iQryX(z
2u0C~s
/** 6wk/IJ`
* @param data 7]}n0*fe
* @param l )m .KV5K!
* @param i DQ'yFPE
*/ /:-8 ,`
private void insertSort(int[] data, int start, int len) { &%."$rC/0b
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); {%Mt-Gm'd
} * !4r}h`
} ? OrRTRW
} zd1X(e<|{
} "YY6_qQR'
o[C,fh,$
堆排序： }Yd7<"kp
,9T-\)sT
package org.rut.util.algorithm.support; O>P792)
)TNAgTmqK
import org.rut.util.algorithm.SortUtil; @f<q&K%FJ
:__z?<?(
/** KW^#DI6tr
* @author treeroot qY^OO~[
* @since 2006-2-2 X%iiz
* @version 1.0 !`j}%!K!
*/ ')ZM# :G
public class HeapSort implements SortUtil.Sort{ ruMS5OqM
>fCz,.L
/* (non-Javadoc) TFrZ+CcWp2
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N7/eF9
*/ ANuIPF4NxP
public void sort(int[] data) { Yvky=RM
MaxHeap h=new MaxHeap(); /%W&zd=%#
h.init(data); &p/^A[
for(int i=0;i h.remove(); xl.iI$P
System.arraycopy(h.queue,1,data,0,data.length); :el]IH
} g\%vkK&I
ko-:)z
private static class MaxHeap{ /,G-1E
6 w"-&
void init(int[] data){ ,yZvT7
this.queue=new int[data.length+1]; ~N2<-~=si
for(int i=0;i queue[++size]=data; lJe=z
fixUp(size); lO?dI=}]
} PjL"7^Q&
} #dcfQ
K,pQ11J
private int size=0; nq9|cS%-
%<4ZU!2L
private int[] queue; u$A*Vsmr
okl*pA)
public int get() { :i;iSrKy
return queue[1]; )ad-p.Hus
} &y164xn'h
l$j/Ye]
public void remove() { RgF5w<Vd.
SortUtil.swap(queue,1,size--); xPuuG{Sm
fixDown(1); }3{ x G+,
} cjTV~(i'4A
file://fixdown Q/JX8<7K
private void fixDown(int k) { 2aROY2
int j; +W{ELdup%q
while ((j = k << 1) <= size) { g\Ck!KJ/y
if (j < size %26amp;%26amp; queue[j] j++; ]KsL(4PY
if (queue[k]>queue[j]) file://不用交换 t%xD epFQ
break; BKiyog
SortUtil.swap(queue,j,k); m[k@\xS4e
k = j; WH@CH4WM
} ]VarO'
} 2swHJ.d\
private void fixUp(int k) { 3,x|w
while (k > 1) { Rds_Cd C
int j = k >> 1; .BaU}-5
if (queue[j]>queue[k]) g~>g])
break; `i'72\(
SortUtil.swap(queue,j,k); 9GH11B_A
k = j; **].d;~[l
} H%}ro.u
} `^mPq?f
'+@q
} {C%#r@6
~E]ct F
} _8-iO.T+2
+Wr"c
SortUtil： eM3-S=R?<g
|zJxR_)
package org.rut.util.algorithm; 3G4N0{i
=V)88@W
import org.rut.util.algorithm.support.BubbleSort; G`a,(<kT;
import org.rut.util.algorithm.support.HeapSort; _kgGz@/p
import org.rut.util.algorithm.support.ImprovedMergeSort; u]D>O$_ s
import org.rut.util.algorithm.support.ImprovedQuickSort; GT -(r+u
import org.rut.util.algorithm.support.InsertSort; m'L7K K-Y)
import org.rut.util.algorithm.support.MergeSort; $r>\y (W
import org.rut.util.algorithm.support.QuickSort; ]VYv>o`2
import org.rut.util.algorithm.support.SelectionSort; B4/0t:^I
import org.rut.util.algorithm.support.ShellSort; W(C\lSE0
%Ydzzr3
/** c h_1-
* @author treeroot # 1S*}Q<k
* @since 2006-2-2 nb -Je+
* @version 1.0 4 ^=qc99
*/ yq?7!X
public class SortUtil { oj8_e xx
public final static int INSERT = 1; jK!Y-
public final static int BUBBLE = 2; B/iRR2h
public final static int SELECTION = 3; 7]i=eD8
public final static int SHELL = 4; GN7\p)
public final static int QUICK = 5; :X?bWxOJ
public final static int IMPROVED_QUICK = 6; d )}@0Q
public final static int MERGE = 7; &TpzJcd"
public final static int IMPROVED_MERGE = 8; Z[(V0/[]
public final static int HEAP = 9; ylV.ZoY6
MzF9 &{N
public static void sort(int[] data) { af:wg]g
sort(data, IMPROVED_QUICK); RWN2P6
} #^\qFj
private static String[] name={ l~Em2@c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" BUuU#e5
}; %(EUZu2
NXwlRMbo
private static Sort[] impl=new Sort[]{ Bn[5M[
new InsertSort(), Esc*+}ck
new BubbleSort(), !PaDq+fB
new SelectionSort(), Fu K(SP3
new ShellSort(), qep<7 QO
new QuickSort(), l c<&f
new ImprovedQuickSort(), ?z:Xdx\l
new MergeSort(), ?pT\Ft V
new ImprovedMergeSort(), QQd%V#M?
new HeapSort() [vIHYp
}; Ly0U')D:
q{rc[ s?
public static String toString(int algorithm){ w Wx,}=
return name[algorithm-1]; W6Os|z9&|
} {kLL&`ii
F-=W7 D:[c
public static void sort(int[] data, int algorithm) { ~}SOd<n)|
impl[algorithm-1].sort(data); ;'\{T#5)
} x*)@:W!
kUl:Yj=&
public static interface Sort { G1Qc\mp
public void sort(int[] data); zLG5m]G4D
} x?ajTzMv
>5i(U_`l
public static void swap(int[] data, int i, int j) { 94=aVM\>>
int temp = data; t=`bXBX1
data = data[j]; DhQYjC[
data[j] = temp; jLULf+8&
} Ha~g8R&
} Ax#$z