[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; Y2=Brtc[@
} eB<V%,%N#
int i1=l; X YNUss
int i2=mid+1; xu%! b0
for(int cur=l;cur<=r;cur++){ I9:G9
if(i1==mid+1) YmO"EWb
data[cur]=temp[i2++]; N#pl mPrZ
else if(i2>r) G!e}j @@
data[cur]=temp[i1++]; /+<%,c$n
else if(temp[i1] data[cur]=temp[i1++]; A/$KA'jX
else FfD ,cDs
data[cur]=temp[i2++]; [/+dHW|
} 8aZey_Hw;+
} 8CnI%_Su
ZyS;+"
} aCUV[CPw
h-2E9Z
改进后的归并排序: l# !@{ <
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package org.rut.util.algorithm.support; /v bO/Mr
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import org.rut.util.algorithm.SortUtil; R@7GCj
_Y ><ih
/** =|6^)lt$
* @author treeroot 7>#L
* @since 2006-2-2 t'=~"?T/o
* @version 1.0 ](9{}DHV
*/ -aH?7HV}
public class ImprovedMergeSort implements SortUtil.Sort { A=qW]Im
S,"ChR
private static final int THRESHOLD = 10; l9ifUhe
+4:+qGAJ{
/* LKqog%,c
* (non-Javadoc) cP#]n)<
* t5jhpPVf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #a'x)$2;R|
*/ 2ucF(^
public void sort(int[] data) { #hE3~+i
int[] temp=new int[data.length]; ,a]~hNR*X
mergeSort(data,temp,0,data.length-1); 5cNzG4z
} M;p q2$
Cj4b]*Q,
private void mergeSort(int[] data, int[] temp, int l, int r) { /qkIoF2
int i, j, k; Pu%>j'A
int mid = (l + r) / 2; Q5Ghki
if (l == r) 9Pob|UA
return; (y+5d00
if ((mid - l) >= THRESHOLD) R8r[;u\iV
mergeSort(data, temp, l, mid); <0Egkz3s
else VU+s7L0
insertSort(data, l, mid - l + 1); Etr8lm E
if ((r - mid) > THRESHOLD) 6dS1\Y
mergeSort(data, temp, mid + 1, r); 4|Gs(^nU
else dW^_tzfF7
insertSort(data, mid + 1, r - mid); G|G?h
<j8&u/Za~'
for (i = l; i <= mid; i++) { ux79"5qb
temp = data; u.L8tR:(
} q/2K=BOh
for (j = 1; j <= r - mid; j++) { f/[?5M[
temp[r - j + 1] = data[j + mid]; 8apKp?~yW
} Tk#&Ux{ZJ
int a = temp[l]; ^a#&wW
int b = temp[r]; `1d`9AS2g
for (i = l, j = r, k = l; k <= r; k++) { QWW7I.9r
if (a < b) { zc,9Qfn
data[k] = temp[i++]; Z=t#*"J
a = temp; E=_B@VJknW
} else { ZLio8
data[k] = temp[j--]; >*i8RqU
b = temp[j]; <,cIc]eX
} @~U6=(+
} K"6+X|yxE
} v/00LR
O<d?'{
/** o`1V
* @param data [@)z$W
* @param l H"RF[bX(
* @param i 10I`AjF0
*/ ; 7v7V
private void insertSort(int[] data, int start, int len) { D%Jc?6/I#3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q.E^9giC
} 4k2c mM$
} FQ~ead36C
} :8|3V~%m
} RJsG]`
<<zz*;RJJ
堆排序： s1vYZ
X-r,>o:
package org.rut.util.algorithm.support; b%jG?HSu
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import org.rut.util.algorithm.SortUtil; k+GK1Yl
AXv;r<
/** y~ 4nF
* @author treeroot bOIM0<(h
* @since 2006-2-2 +-YuBVHL
* @version 1.0 CU^3L|f2N
*/ H{Y=&#%d
public class HeapSort implements SortUtil.Sort{ iK:qPrk-
j72]_G
/* (non-Javadoc) ~0r.3KTl"Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kt0{-\ p
*/ 'xXqEwi4
public void sort(int[] data) { QOy&!6
MaxHeap h=new MaxHeap(); *P\_:>bV(
h.init(data); QpTNU.v5f
for(int i=0;i h.remove(); TvG:T{jwy
System.arraycopy(h.queue,1,data,0,data.length); '2J6%Gg
} +rpd0s49
|laKntv2
private static class MaxHeap{ B5r_+?=2e
8*~:gZ7:
void init(int[] data){ 18tQWI$
this.queue=new int[data.length+1]; 9Kx:^~}20o
for(int i=0;i queue[++size]=data; gN'i+mQcu
fixUp(size); -2ij;pkIW$
} zjh9ZLu[
} &j@J<*k
GJ_)Cl+5E
private int size=0; Ns= b&Uyc
;fME4Sp
private int[] queue; 207oEO]
v/+}FS=
public int get() { O36r ,/X
return queue[1]; w>BFgb?
} ;/3/R/^g
sq|@9GS0T
public void remove() { CvWEXY_P2
SortUtil.swap(queue,1,size--); XJ/kB8
fixDown(1); `e|Lw
} i*w-Q=
file://fixdown z n8ig/C
private void fixDown(int k) { Y]Vc}-a(h
int j; Cj\+u\U#
while ((j = k << 1) <= size) { mg/kyua^
if (j < size %26amp;%26amp; queue[j] j++; q0Lt[*q3R
if (queue[k]>queue[j]) file://不用交换 #$C]0]|
break; cB=u;$k@*
SortUtil.swap(queue,j,k); R+hS;F nh%
k = j; B2WX#/lgd
} AlaN;
} U (7P X`1
private void fixUp(int k) { BXw,Rz }
while (k > 1) { ts!aKx
int j = k >> 1; U(LR('-h
if (queue[j]>queue[k]) <X&:tZ#/
break; L([>yQZ
SortUtil.swap(queue,j,k); ''Ec-b6Q-
k = j; )'|W[Sh?
} bxe97]
} K"$ky,tU
OBQ!0NM_b
} 3g:+p
zNJyF;3
} Vn;]''_
7Q}@L1A9F,
SortUtil： M=_CqK*
FY*0gp
package org.rut.util.algorithm; G_4P)G3H
jk}PucV
import org.rut.util.algorithm.support.BubbleSort; &B7KWvAy
import org.rut.util.algorithm.support.HeapSort; gRI|rDC)B
import org.rut.util.algorithm.support.ImprovedMergeSort; RUh{^3;~
import org.rut.util.algorithm.support.ImprovedQuickSort; %y+j~]^:
import org.rut.util.algorithm.support.InsertSort; "T=LHjE
import org.rut.util.algorithm.support.MergeSort; bkIA:2HX
import org.rut.util.algorithm.support.QuickSort; :''0z
import org.rut.util.algorithm.support.SelectionSort; ?7a[|-
import org.rut.util.algorithm.support.ShellSort; L$Z_j()2
H/{3 i
/** wuQkeWxJ
* @author treeroot *.l=>#qF
* @since 2006-2-2 (@ sKE
* @version 1.0 )\G#[Pc7
*/ KrH;o)|
public class SortUtil { CZ}tQx5ga
public final static int INSERT = 1; q)zvePO#
public final static int BUBBLE = 2; {v(|_j&:o
public final static int SELECTION = 3; DR8dJ#
public final static int SHELL = 4; YO+d+5
public final static int QUICK = 5; QLl44*@
public final static int IMPROVED_QUICK = 6; bNgcZ V.
public final static int MERGE = 7; m#'9)%t!J
public final static int IMPROVED_MERGE = 8; &pl;U\dc*a
public final static int HEAP = 9; li^E$9oWC
?GZs5CnS
public static void sort(int[] data) { v}@6"\
sort(data, IMPROVED_QUICK); $=R\3:j
} h,G$e|[?
private static String[] name={ uESHTX/[
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ']x]X,
}; N@S;{uK
k2;yl_7
private static Sort[] impl=new Sort[]{ u}_q'=<\
new InsertSort(), u e~1144
new BubbleSort(), a3[aXe
new SelectionSort(), ERplDSfO-
new ShellSort(), Dl6zl6q?
new QuickSort(), (aLnbJeJ
new ImprovedQuickSort(), b-XBs7OAx
new MergeSort(), s!Vtwp9
new ImprovedMergeSort(), $MHc4FE[
new HeapSort() Emo]I[<&q
}; de[_T%A
k9 E?5
public static String toString(int algorithm){ _35?z"0
return name[algorithm-1]; RIlPH~
} i7_BnJJX{B
'1aOdEZA*
public static void sort(int[] data, int algorithm) { ~mU#u\r(*
impl[algorithm-1].sort(data); ^z1WPI
} Q_S fFsY
E#OKeMK
public static interface Sort { @EvnV.
public void sort(int[] data); #PGExN3e
} .KV?;{~q@
fO+;%B
public static void swap(int[] data, int i, int j) { O<5bsKw'r
int temp = data; y g7z?AZ
data = data[j]; _]NM@'e
data[j] = temp; 3ul
} rB\UNXy
} rmhB!Lo