[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; rH9|JEz
} {Ac3/UM/
int i1=l; Q!$kUcky9
int i2=mid+1; q?b)zeJ
for(int cur=l;cur<=r;cur++){ QH56tQq
if(i1==mid+1) ;kcFQed\w
data[cur]=temp[i2++]; xdSj+507
else if(i2>r) ZpP6Q
data[cur]=temp[i1++]; lVKF^-i
else if(temp[i1] data[cur]=temp[i1++]; {gq:sj>
else /)HEx&SQmZ
data[cur]=temp[i2++]; ^SES')x
} m]b.P,~v
} jl|X$w
i=+<7]Q
} r'}k`A5>
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改进后的归并排序: W71#NjM2Z
;R-Q,aCM}
package org.rut.util.algorithm.support; u=?P*Y/|W
'J<zVD}0
import org.rut.util.algorithm.SortUtil; "\P~Re"EH
Ffqn|}gb
/** :Y&W)V-
* @author treeroot ?F:C!_
* @since 2006-2-2 N/SB}Fj
* @version 1.0 )}Mt'd
*/ Ay. q)
public class ImprovedMergeSort implements SortUtil.Sort { jZgnt{
r4qV}-E
private static final int THRESHOLD = 10; ^*T{-U'
Xv;ZAa
/* D_`)T;<Sp
* (non-Javadoc) >w'?DV>u|
* xo@/k
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {hp@j#
*/ l=G#gKE
public void sort(int[] data) { 'Rf#1ls#
int[] temp=new int[data.length]; n@8{FoF
mergeSort(data,temp,0,data.length-1); qv >(
} XT;IEZQZ
dXSb%ho
private void mergeSort(int[] data, int[] temp, int l, int r) { 2T?1X{g
int i, j, k; ?@7|Q/
int mid = (l + r) / 2; ErUk>V
if (l == r) .*..pf|/
return; eFI9S.6
if ((mid - l) >= THRESHOLD) >WG91b<Xq
mergeSort(data, temp, l, mid); dJgOfg^
else GAe_Z(T
insertSort(data, l, mid - l + 1); $+yQ48Wq
if ((r - mid) > THRESHOLD) 3xR#,22:}
mergeSort(data, temp, mid + 1, r); H<3b+Sg
else k{$"-3ed
insertSort(data, mid + 1, r - mid); Z)>a6s$ih<
q+=@kXs>+
for (i = l; i <= mid; i++) { [ Sa C
temp = data; bSKV|z/x
} M;@03 x W
for (j = 1; j <= r - mid; j++) { yH0ZSv
temp[r - j + 1] = data[j + mid]; *fyEw\`a
} P=hf/jOv9
int a = temp[l]; )HiTYV)]'
int b = temp[r]; nWg)zj:
for (i = l, j = r, k = l; k <= r; k++) { k.VOS0
if (a < b) { K":tr~V;
data[k] = temp[i++]; -"b3q
a = temp; IOsDVIXL\
} else { t,Rn
data[k] = temp[j--]; Nd!=3W5?
b = temp[j]; Wam?(!{mOf
} i]Of<eQ"
} (4gQe6tA
} <Gt{(is
>Qu^{o
/** R-0Ohj
* @param data J;9QDrl`
* @param l QRix_2+
* @param i I ywx1ac
*/ GOgT(.5
private void insertSort(int[] data, int start, int len) { ]t0S_UH$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); V)?g4M3}
} i(#c Yb
} rm;"98~zJ?
} , X+(wp
} 4E94W,1%,Y
LPgI"6cP
堆排序： .EELR]`y7I
|xC TX
package org.rut.util.algorithm.support; X64I~*
Rs`Y'_B
import org.rut.util.algorithm.SortUtil; LU=)\U@Q
f*@:{2I.v
/** Z1}zf(JU
* @author treeroot ooxzM `
* @since 2006-2-2 _^A NJ7
* @version 1.0 YR`rg;n#
*/ F#R\Ot,hv
public class HeapSort implements SortUtil.Sort{ K8we*
soCHwiE
/* (non-Javadoc) =5#Jsn?U
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c.> (/
*/ fXQRsL8 ]
public void sort(int[] data) { "C|l3X'
MaxHeap h=new MaxHeap(); G+p>39P
h.init(data); +u)$o
for(int i=0;i h.remove(); PA[Rhoit,
System.arraycopy(h.queue,1,data,0,data.length); s&hP^tKT
} `h]f(
Y3&ecEE
private static class MaxHeap{ F'Vl\qPt
sM_e_e
void init(int[] data){ U Bg_b?k
this.queue=new int[data.length+1]; *a.*Ha
for(int i=0;i queue[++size]=data; |a\TUzq
fixUp(size); nAj2k
} @=1``z#
} b DvbM
eF\C?4
private int size=0; J4X35H=Z
N#ObxOE6T"
private int[] queue; \mGM#E
Ji=iq=S7
public int get() { DgP%Q
return queue[1]; vGDo?X~#o
} 9^olAfX`dB
xb;mm9H
public void remove() { MPc=cLv
SortUtil.swap(queue,1,size--); uwzT? C A6
fixDown(1); K>6p5*&
} znRhQ+8;!
file://fixdown g>CQO,s;w
private void fixDown(int k) { {P+[CO
int j; Puh&F< B
while ((j = k << 1) <= size) { ?Ea"%z*c5
if (j < size %26amp;%26amp; queue[j] j++; u{z{3fW_
if (queue[k]>queue[j]) file://不用交换 'kK%sE
break; oPBjsQ
SortUtil.swap(queue,j,k); x=)$sD-3
k = j; (La
} ,oil}N(
} /L^dHI]Q
private void fixUp(int k) { }5Uf`pM8
while (k > 1) { 6Fb~`J~s
int j = k >> 1; dG+xr!
if (queue[j]>queue[k]) *@^0xz{\z
break; tTt~W5lo
SortUtil.swap(queue,j,k); TQH#sx
k = j; +Eg# 8/q
} * vD<6qf
} E(#2/E6
h='=uj8o5
} NR{:4zJT
.EwK>ro4
} H'>
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SortUtil： i/z7a%$
],|B4\b;
package org.rut.util.algorithm; UJ:B:hh''
j C?
import org.rut.util.algorithm.support.BubbleSort; (0S7
import org.rut.util.algorithm.support.HeapSort; rJ>8|K[kt
import org.rut.util.algorithm.support.ImprovedMergeSort; NBX/V^
import org.rut.util.algorithm.support.ImprovedQuickSort; *Yw6UCO
import org.rut.util.algorithm.support.InsertSort; R#M).2::
import org.rut.util.algorithm.support.MergeSort; :Ib\v88WIv
import org.rut.util.algorithm.support.QuickSort; d\M !o*U
import org.rut.util.algorithm.support.SelectionSort; jK53-tF~I
import org.rut.util.algorithm.support.ShellSort; ;*p}~#2
J)o%83//
/** ,?+yu6eLb
* @author treeroot `RRORzXoS
* @since 2006-2-2 +l(}5(wc
* @version 1.0 3OlY Ml
*/ I5]zOKlVR
public class SortUtil { w0iEx1i
public final static int INSERT = 1; rB]/N,R
public final static int BUBBLE = 2; u.6%n.g
public final static int SELECTION = 3; {'%=tJ[YX
public final static int SHELL = 4; TF>F7v(,45
public final static int QUICK = 5; da@ .J9
public final static int IMPROVED_QUICK = 6; v#xF;@G
public final static int MERGE = 7; |Oe6OCPf
public final static int IMPROVED_MERGE = 8; Wt=[R 4=
public final static int HEAP = 9; 2_Z60]
9 pn1d.
public static void sort(int[] data) { It[~0?+
sort(data, IMPROVED_QUICK); FBsw\P5w
} 0'uj*Y{L
private static String[] name={ hkG<I';M?M
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 0ZN/-2c A#
}; mf#oa~_
WyP1"e^9
private static Sort[] impl=new Sort[]{ ZUycJ-[
new InsertSort(), #A!0KN;GC2
new BubbleSort(), cf9y0
new SelectionSort(), {;U:0BPI3
new ShellSort(), Nsq%b?#
new QuickSort(), iKwVYL
new ImprovedQuickSort(), .PgkHb=l@
new MergeSort(), *6L^A`_1]
new ImprovedMergeSort(), uY,FugWbl
new HeapSort() ln5On_Wm
}; &BkNkb0
k>"I!&#g
public static String toString(int algorithm){ Ad`IgZ
return name[algorithm-1]; X9R-GT
} ~$B,K]
eR CGr?e4
public static void sort(int[] data, int algorithm) { P\JpE
impl[algorithm-1].sort(data); j*"s~8u4
} H UjmJu6f{
2k_Bo~.
public static interface Sort { sdLFBiR
public void sort(int[] data); {<@~;iq
} /.r($Sg^
15COwc*k
public static void swap(int[] data, int i, int j) { ?4_;9MkN
int temp = data; _[x(p6Xp
data = data[j]; 8'y|cF%U
data[j] = temp; %}/)_RzQ
} 4J s>yP
} r"+ WUU