[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; d8Jy$,/`?
} .pQH>;k]K
int i1=l; 7*y_~H
int i2=mid+1; J&S$F:HM
for(int cur=l;cur<=r;cur++){ q2 D2:0^2
if(i1==mid+1) @HJ&"72$<
data[cur]=temp[i2++]; =6imrRaaV
else if(i2>r) -,Cx|Nl
data[cur]=temp[i1++]; 9_[TYzpB!
else if(temp[i1] data[cur]=temp[i1++]; }6.R.*Imz
else X>2_Gol!
data[cur]=temp[i2++]; B;[{7J]
} ?ltTJ(Po
} OwV>`BIwns
ex7zg!
} |\2zw _o
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改进后的归并排序: >|!F.W
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package org.rut.util.algorithm.support; tYiK#N7
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import org.rut.util.algorithm.SortUtil; R6]/g
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/** Bv \ihUg/
* @author treeroot ,K .P,z~*
* @since 2006-2-2 Ojq>4=Z\
* @version 1.0 =2pGbD;*
*/ R_\{a*lV0
public class ImprovedMergeSort implements SortUtil.Sort { Lv+lLK
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private static final int THRESHOLD = 10; EP&iG%(k
)6iY9[@tN
/* n;Tpf<*U
* (non-Javadoc) MPA<?
* [jve |-v=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9kL'"0c
*/ Ra<mdteZT
public void sort(int[] data) { 9r@r\-
int[] temp=new int[data.length]; FOgF'!K
mergeSort(data,temp,0,data.length-1); }UZ$<81=
} 6Lz{/l8
X{\>TOk
private void mergeSort(int[] data, int[] temp, int l, int r) { ~PP*k QZlJ
int i, j, k; T{d7,.:
int mid = (l + r) / 2; $-YS\R\9x
if (l == r) +Sv`23G@
return; P!:Y<p{=>
if ((mid - l) >= THRESHOLD) `%p}.X
mergeSort(data, temp, l, mid); OaRtGJnR
else Q*Per;%J
insertSort(data, l, mid - l + 1); *O,\/aQ+
if ((r - mid) > THRESHOLD) G^!20`p:
mergeSort(data, temp, mid + 1, r); ]R\k@a|G
else =K .'x
insertSort(data, mid + 1, r - mid); CUfD[un2D
z6S N
for (i = l; i <= mid; i++) { E.Xfb"]
temp = data; a h>k=t8(
} QgO@oV*S
for (j = 1; j <= r - mid; j++) { g #u1.|s&p
temp[r - j + 1] = data[j + mid]; ZN-J!e"`
} )Yz` 6
int a = temp[l]; V;mKJ.d${
int b = temp[r]; ;({&C34a
for (i = l, j = r, k = l; k <= r; k++) { 3g9xTG);eA
if (a < b) { 7)S`AQ2:)
data[k] = temp[i++]; xekW-=#a7-
a = temp; YFOSv]w
} else { iJIPH>UMX
data[k] = temp[j--]; !/ TeTmo
b = temp[j]; q0{KYWOvk
} J!O5`k*.C
} nzE4P3 C+
} v' .:?9
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/** Xg?hh 0s
* @param data .9+"rK}u
* @param l k-xh-&
* @param i RoSh|$JF
*/ o1YX^-<[F
private void insertSort(int[] data, int start, int len) { 'x{g P?.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); <iunDL0
} n(l!T 7
} G<OC99;8
} 1VL!0H
} ~'KymarPU
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堆排序： D oX!P|*
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package org.rut.util.algorithm.support; A#M#JI-Y
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import org.rut.util.algorithm.SortUtil; N~_GJw@
&!]$#
/** ^qs=fF
* @author treeroot )a.Y$![
* @since 2006-2-2 m619bzFlB
* @version 1.0 y[Zl,v7
*/ S-WD?BFC
public class HeapSort implements SortUtil.Sort{ =i }
~Wjm"|c
/* (non-Javadoc) 7tMV*{+Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) u$$@Hw
*/ )n}Wb+2I
public void sort(int[] data) { A\iDK10Q$
MaxHeap h=new MaxHeap(); kLQPa[u4
h.init(data); :TJv<NZi'
for(int i=0;i h.remove(); <8yzBp4gZ
System.arraycopy(h.queue,1,data,0,data.length); rlk0t159
} no`c[XY
]c]rIOTN
private static class MaxHeap{ asb-syqU
*,5V;7OR
void init(int[] data){ <uDEDb1|l
this.queue=new int[data.length+1]; w'z?1M(*
for(int i=0;i queue[++size]=data; @G[P|^B
fixUp(size); 0b+OB pqN
} ~[dU%I>L^
} 2Un~Iy
1OK,r`
private int size=0; h!ZEZ|{
EGL1[7It`
private int[] queue; Da*=uW9
a_XM2dc%
public int get() { "-GjwB
return queue[1]; exrsYo!%
} -FV$Sne
L ?g|:
public void remove() { *`OgwMr)M
SortUtil.swap(queue,1,size--); $r)+7i
fixDown(1); xZW6Hk_
} *CZvi0&
file://fixdown md:$OC3
private void fixDown(int k) { Y~EKMowI&e
int j; RB.&,1
while ((j = k << 1) <= size) { l4?o0;:)
if (j < size %26amp;%26amp; queue[j] j++; lb ol+O65
if (queue[k]>queue[j]) file://不用交换 98eiYh
break; 8 P85qa@w
SortUtil.swap(queue,j,k); 90L,.
k = j; 3IQ)%EN
} <-62m8N|
} &S}%)g%Iv9
private void fixUp(int k) { w|:UTJ>@
while (k > 1) { ..6 : _{wg
int j = k >> 1; rq?:I:0
if (queue[j]>queue[k]) Qg;A (\z
break; 2*Hw6@Jj
SortUtil.swap(queue,j,k); Dw{rjK\TT'
k = j; xO)vn\uJ
} c;c'E&9P]
} R+k-mbvnt
/B)ZB})z
} H6(kxpOI\
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} 'b#RfF,7H}
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SortUtil： ga&l.:lo
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package org.rut.util.algorithm; ^_ <jg0V
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import org.rut.util.algorithm.support.BubbleSort; l0AgW_T
import org.rut.util.algorithm.support.HeapSort; Ry>c]\a]
import org.rut.util.algorithm.support.ImprovedMergeSort; ufAp7m@ud
import org.rut.util.algorithm.support.ImprovedQuickSort; =<w6yeko
import org.rut.util.algorithm.support.InsertSort; d!kiWmw,
import org.rut.util.algorithm.support.MergeSort; 6, \i0y5n
import org.rut.util.algorithm.support.QuickSort; JR{3n*
import org.rut.util.algorithm.support.SelectionSort; <Z5ak4P
import org.rut.util.algorithm.support.ShellSort; KD?~ hpg
`l,=iy$
/** @Aa$k:_
* @author treeroot !]1X0wo\
* @since 2006-2-2 k_%2Ok
* @version 1.0 b);Pw"_2
*/ RaT(^b(
public class SortUtil { +;~JHx.~X
public final static int INSERT = 1; y;Xb."e~
public final static int BUBBLE = 2; sPY*2B
public final static int SELECTION = 3; n^P=a'+
public final static int SHELL = 4; \hN\px
public final static int QUICK = 5; dK'?<w$
public final static int IMPROVED_QUICK = 6; V&`\ s5Q
public final static int MERGE = 7; RN\4y{@
public final static int IMPROVED_MERGE = 8; 54~`8f
public final static int HEAP = 9; 4]9+
nB"r<?n<
public static void sort(int[] data) { ]jiM
sort(data, IMPROVED_QUICK); jqxeON
} @s!9T
private static String[] name={ p'UYHt
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]:`q/iS&
}; :q=u+h_
02E-|p;
private static Sort[] impl=new Sort[]{ "&?F6Pi
new InsertSort(), `$oGgz6ZT
new BubbleSort(), l'=H,8LfA
new SelectionSort(), , f9V`Pz)
new ShellSort(), wy6>^_z
new QuickSort(), 9,|{N(N<!
new ImprovedQuickSort(), ?95^&4Oh0
new MergeSort(), kG_ K&,;@
new ImprovedMergeSort(), mqgA
new HeapSort() m^cr-'
}; W5,e;4/hL
T|^rFaA
public static String toString(int algorithm){ ~qQSt%
return name[algorithm-1]; edld(/wu~
} x*td nor&
NIufL }6\
public static void sort(int[] data, int algorithm) { cF!ygz//
impl[algorithm-1].sort(data); =ic"K6mhq
} KrE:ilm#^Y
@Ee{ GH^-
public static interface Sort { hJY= )
public void sort(int[] data); ceBu i8a |
} /Am,5X.
`|K30hRp:
public static void swap(int[] data, int i, int j) { ?"f\"N
int temp = data; q<(yNqMKP
data = data[j]; [uCW8:e
data[j] = temp; K];`
} j`jF{k b
} ,l`4)@{G