[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; snikn&
} i 3SHg\~Z
int i1=l; 2:=
int i2=mid+1; m#F`] {
for(int cur=l;cur<=r;cur++){ &t-kpA|EG
if(i1==mid+1) ---N9I
data[cur]=temp[i2++]; f V(J|
else if(i2>r) YnP5i#"
data[cur]=temp[i1++]; cs'{5!i]
else if(temp[i1] data[cur]=temp[i1++]; wa3}SB
else OUXR
data[cur]=temp[i2++]; rXU\
} ?R#)1{(8d~
} Xs?o{]Fe
<d_!mKw
} C'X!\}f.b/
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改进后的归并排序: Oc; G(l(
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package org.rut.util.algorithm.support; &! ?eL
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import org.rut.util.algorithm.SortUtil; GM<-&s!Uj
Wxe0IXq3Nn
/** OBAi2Vw
* @author treeroot &8 x-o,
* @since 2006-2-2 yvYad
* @version 1.0 vZoaT|3 G]
*/ eGHaY4|
public class ImprovedMergeSort implements SortUtil.Sort { }>X~
O1mKe%'|
private static final int THRESHOLD = 10; VAu&@a`
xZv#Es%#
/* ?3xzd P
* (non-Javadoc) jalg5`PU0
* DDH:)=;z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) nj53G67y
*/ I.k *GW
public void sort(int[] data) { E\,-XH
int[] temp=new int[data.length]; 1y4
mergeSort(data,temp,0,data.length-1); 0_t`%l=
} LE>]8[f6S
*`RkTcG
private void mergeSort(int[] data, int[] temp, int l, int r) { Y.r+wc]
int i, j, k; h2""9aP!
int mid = (l + r) / 2; 5[u]E~Fl}
if (l == r) xUistwq
return; Vy,DN~ag
if ((mid - l) >= THRESHOLD) hfy_3}_
mergeSort(data, temp, l, mid); (=@h23 vH
else /~f'}]W
insertSort(data, l, mid - l + 1); xlg9TvvI
if ((r - mid) > THRESHOLD) q%?in+l
mergeSort(data, temp, mid + 1, r); H+Sz=tg5
else 1 Ya`| ?FS
insertSort(data, mid + 1, r - mid); qm o9G
sp*v?5lW
for (i = l; i <= mid; i++) { KMjhZap%
temp = data; R!N%o~C2-
} \)?HJ
for (j = 1; j <= r - mid; j++) { l2P=R)@{
temp[r - j + 1] = data[j + mid]; ]`+HO=0
} hFl^\$Re
int a = temp[l]; P(z++A&
int b = temp[r]; 1HZO9cXJ
for (i = l, j = r, k = l; k <= r; k++) { ';=O 0)u
if (a < b) { =rCIumqD-}
data[k] = temp[i++]; pD#rnp>WWt
a = temp; Ak"m 85B
} else { KNIn:K^/
data[k] = temp[j--]; 5,6"&vU,
b = temp[j]; [ ~&/s:Vvo
} ah+iZ}E%
} C&rkvM8
} 9c :cw
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/** 4u5-7[TZ
* @param data ]F'e aR
* @param l g~A`N=r;h
* @param i HqT#$}rv
*/ "mvt>X
private void insertSort(int[] data, int start, int len) { .+A+|yR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); T <ET )D7
} Q|?L*Pq2I
} 76h ,]xi
} =mp;.k95
} zsyIV!(
#KexvP&*
堆排序： orMwAV
aH/ k Ua
package org.rut.util.algorithm.support; FSW_<%
X!dYdWw*m
import org.rut.util.algorithm.SortUtil; ;P%1j|7
_C[q4?
/** .MoU1n{Yc
* @author treeroot |_aa&v~
* @since 2006-2-2 G^4hd i3@
* @version 1.0 '^~{@~ ;%L
*/ 65$+{s
public class HeapSort implements SortUtil.Sort{ nwRc%C``UK
V7fq4O^:
/* (non-Javadoc) "Nbq#w\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8(&[Rs?K
*/ /zVOK4BqN+
public void sort(int[] data) { %%gc2s
MaxHeap h=new MaxHeap(); !/i{l
h.init(data); 9c,'k#k
for(int i=0;i h.remove(); YvyNHW&
System.arraycopy(h.queue,1,data,0,data.length); mQ26K~
} ++Ts
V_}"+&W9
private static class MaxHeap{ ;dZZ;#k%
|AU~_{H
void init(int[] data){ hVAn>_(
this.queue=new int[data.length+1]; RF53Jyt
for(int i=0;i queue[++size]=data; "2$fi{9
fixUp(size); ryUQU^v
} Tc`=f'pP)4
} peuZ&yK+"
Ep3N&Imp
private int size=0; '3DXPR^B6
CiLg]va
private int[] queue; V>-e y9Q\
q"sed]
public int get() { ]e>w}L(gV
return queue[1]; %JD,$pPs
} dkBIx$t
4,gK[ dc
public void remove() { H-*yh!
SortUtil.swap(queue,1,size--); *>'V1b4}
fixDown(1); P& -Qc
} <~'"<HwtK
file://fixdown `FDiX7M
private void fixDown(int k) { '+!1Y o'G
int j; suiS&$-E
while ((j = k << 1) <= size) { /dQl)tL
if (j < size %26amp;%26amp; queue[j] j++; sF?TmBQ*
if (queue[k]>queue[j]) file://不用交换 udUyh%n
break; pVw}g@<M
SortUtil.swap(queue,j,k); )SRefW.v
k = j; QP8Ei~
} ujq=F
} 6/Xk7B
private void fixUp(int k) { Eog0TQ+*
while (k > 1) { )E@.!Ut4o
int j = k >> 1; u4F5h PO]
if (queue[j]>queue[k]) >#~& -3
break; >j(_[z|v3
SortUtil.swap(queue,j,k); cr?Q[8%t1
k = j; BsqP?/
} ,nLy4T&"
} q#ClnG*
Ou!2[oe@M
} X0H!/SlS
xH(lm2kvT
} Qu"\wE^.`
}c`"_L
SortUtil： #Z`q+@@]A
AFDq}*2Qb
package org.rut.util.algorithm; G"U9E5O
YYl4"l
import org.rut.util.algorithm.support.BubbleSort; ~tUl}
import org.rut.util.algorithm.support.HeapSort; kmsb hYM)
import org.rut.util.algorithm.support.ImprovedMergeSort; eH3JyzzP,
import org.rut.util.algorithm.support.ImprovedQuickSort; &5spTMw8
import org.rut.util.algorithm.support.InsertSort; ZQoU3AD;
import org.rut.util.algorithm.support.MergeSort; AJ?r,!)
import org.rut.util.algorithm.support.QuickSort; wh\}d4gN
import org.rut.util.algorithm.support.SelectionSort; 2"kLdD
import org.rut.util.algorithm.support.ShellSort; YY((V@|K
nE&@Q
/** >:S?Mnv6
* @author treeroot ZaDyg"Tw+
* @since 2006-2-2 # 448-8x
* @version 1.0 C]eSizS.
*/ '}JhzKNj
public class SortUtil { X!Mx5fg
public final static int INSERT = 1; B=yqW
public final static int BUBBLE = 2; N^ds RYC
public final static int SELECTION = 3; V>)OpvoT#
public final static int SHELL = 4; t?ZI".>
public final static int QUICK = 5; ^ft>@=K(|
public final static int IMPROVED_QUICK = 6; YEs&
public final static int MERGE = 7; R{3N&C
public final static int IMPROVED_MERGE = 8; YX7L?=;.@
public final static int HEAP = 9; *:YiimOY"
C'+YQ]u
public static void sort(int[] data) { EXwo,?I
sort(data, IMPROVED_QUICK); WJndoB.f[2
} udF~5w H
private static String[] name={ /-ch`u md
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 2LL'J7
}; {3p4:*}
tl4V7!U@^z
private static Sort[] impl=new Sort[]{ F/bT)QT<f
new InsertSort(), ,p@y] cr
new BubbleSort(), *,)Md[
new SelectionSort(), :q7Wy&ow
new ShellSort(), k\YG^I
new QuickSort(), UcDS9f_87
new ImprovedQuickSort(), *_{j=sd
new MergeSort(), [vK^Um
new ImprovedMergeSort(), |zNX=mAV
new HeapSort() _AYK435>N
}; o\<ULW*
*@r/5pM2}
public static String toString(int algorithm){ 69?wc!
return name[algorithm-1]; Un(aW=PQ0
} M~#gRAUJ
Xe'x[(l
public static void sort(int[] data, int algorithm) { 0r] t`{H
impl[algorithm-1].sort(data); dA`IEQJL
} E7Ul;d
3cyHfpx-W
public static interface Sort { p8H'{f\G
public void sort(int[] data); -.@r#d/
} @* jz o
b8VTo lJ
public static void swap(int[] data, int i, int j) { "a>q`RaIQ"
int temp = data; 5 +YH.4R
data = data[j]; cLJ$M`e
data[j] = temp; nQtWvT
} R'`qKc
} z'U1bMg