[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; g*uO IF
} i)ctrdP-
int i1=l; TM;)[R@
int i2=mid+1; J0k~%
for(int cur=l;cur<=r;cur++){ 6=k^gH[g
if(i1==mid+1) "lt[)3*
data[cur]=temp[i2++]; pOXEM1"2A
else if(i2>r) 195(Kr<5$
data[cur]=temp[i1++]; [%pZM.jFO
else if(temp[i1] data[cur]=temp[i1++]; Et(prmH
else p%_TbH3j`
data[cur]=temp[i2++]; `:&{/|uP7
} }Z|a?J@CZm
} pI4<` K
p#w,+)1!d
} &2DW
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改进后的归并排序: >8##~ZuF+
iDA`pemmi&
package org.rut.util.algorithm.support; Ic*Q(X
&}oDSD H^,
import org.rut.util.algorithm.SortUtil; ]KmYPrCl0
W*0KAC`m
/** [3s~Z8 pP
* @author treeroot '"&?u8u)
* @since 2006-2-2 udB}`<Q
* @version 1.0 ?s//a_nL*
*/ |7argk+
public class ImprovedMergeSort implements SortUtil.Sort { g!8-yri
A U](pXK;
private static final int THRESHOLD = 10; B?]^}r
U*Q$:%72vO
/* l!b#v`
* (non-Javadoc) h(9K7
* jH8F^KJM[
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /1Eg6hf9B
*/ {0|^F!1z
public void sort(int[] data) { "}n]0 >J
int[] temp=new int[data.length]; *]LM2J
mergeSort(data,temp,0,data.length-1); ^^v!..V]J
} Ne=D$o
;RR)C@n1
private void mergeSort(int[] data, int[] temp, int l, int r) { 6|zA,-=
int i, j, k; y,aASy!Q
int mid = (l + r) / 2; U@9n7F
if (l == r) c9Cp!.#*E
return; Y!5-WXH
if ((mid - l) >= THRESHOLD) 'b-}KDP
mergeSort(data, temp, l, mid); EprgLZ1B
else "G<^@v9
insertSort(data, l, mid - l + 1); aJub("
if ((r - mid) > THRESHOLD) |2mEowAd
mergeSort(data, temp, mid + 1, r); yPL@uCzA@
else LB>!%Vx
insertSort(data, mid + 1, r - mid); Uu G;z5
x{=ty*E
for (i = l; i <= mid; i++) { 6`4=!ZfI
temp = data; y'(;!5w
} _W$4Qn+f
for (j = 1; j <= r - mid; j++) { 5@i/4%S
temp[r - j + 1] = data[j + mid]; /@0wbA
} $Q62 7
int a = temp[l]; n84*[d}t
int b = temp[r]; $} ~:x_[
for (i = l, j = r, k = l; k <= r; k++) { I&4|T<j
if (a < b) { NKRNEq!
data[k] = temp[i++]; )jnxR${M
a = temp; <CeDIX t
} else { m#Rll[
data[k] = temp[j--]; {4 *ob@w*
b = temp[j]; #\fApRL
} }E*#VA0/nY
} sq*sbdE
} 8USF;k
k kY*OA
/** z1s9[5
* @param data E:#VS~
* @param l nNf/$h#;O
* @param i s<n5^Vxy
*/ TTS}, `
private void insertSort(int[] data, int start, int len) { B|#"dhT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); xCGvLvFn
} \=1k29O
} Nn+leM
} ]^R;3kU4Q
} j$BM$q/c
^,@Rd\q
堆排序： 'xhX\?mD
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package org.rut.util.algorithm.support; ur"ckuG!9
yPKeatH]
import org.rut.util.algorithm.SortUtil; Za5*HCo
L=?Yc*vg
/** .(`#q@73
* @author treeroot }3ty2D#/:
* @since 2006-2-2 ]=7}Y%6
* @version 1.0 M{Wla7
*/ !Hxx6/
public class HeapSort implements SortUtil.Sort{ !'[f!vsyM{
y.HE3tH
/* (non-Javadoc) (ybKACx
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AKejWh
*/ ZU5hHah.t
public void sort(int[] data) { y>UM~E
MaxHeap h=new MaxHeap(); ]W]o6uo7
h.init(data); i.C+{QH
for(int i=0;i h.remove(); I5 "Z
System.arraycopy(h.queue,1,data,0,data.length); Y7{IF X
} mR)Xq=
nn5tOV}QE
private static class MaxHeap{ YAYPof~A$l
cQ} ,q+GR~
void init(int[] data){ %4*-BCP
this.queue=new int[data.length+1]; ,6uON@
for(int i=0;i queue[++size]=data; L'iENZI$
fixUp(size); GWsvN&nr
} _0Qp[l-
} i 3?=up!
*<c, x8\s9
private int size=0; U-&dn%Sq
l 8qCg/ew
private int[] queue; 5|z>_f.^pS
N_Q)AXr)
public int get() { Z?ZiK1) K
return queue[1]; ~)xg7\k
} SaceIV%(
2.)xWCG
public void remove() { +i HZ*
SortUtil.swap(queue,1,size--); h8B:}_Cu
fixDown(1); W5z<+8R
} 6Lj=%&
file://fixdown #;~`+[y?\
private void fixDown(int k) { X67^@~l
int j; -!V+>.Oh
while ((j = k << 1) <= size) { Gmi ^2?Z(
if (j < size %26amp;%26amp; queue[j] j++; @-ps[b`z
if (queue[k]>queue[j]) file://不用交换 &\6Buw_
break; 14>WpNN
SortUtil.swap(queue,j,k); W}jel}:
k = j; r&!Ebe-
} 2MY-9(no
} l ld,&N8
private void fixUp(int k) { ~C M%WvS
while (k > 1) { M:TN^ rA|
int j = k >> 1; <5@VFRjc
if (queue[j]>queue[k]) X%JQ_Z
break; '^mCLfo0}
SortUtil.swap(queue,j,k); |p_\pa1&
k = j; p6S{OUiG
} (dvsGYT|.
} v\lhbpk
l/*NscYtQ
} &k53*Wo
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} 2:[ -
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SortUtil： lB)%s~P:s
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package org.rut.util.algorithm; 2><=U7~
~t=73fwB
import org.rut.util.algorithm.support.BubbleSort; <DeC^[-P
import org.rut.util.algorithm.support.HeapSort; LK>AC9ak<
import org.rut.util.algorithm.support.ImprovedMergeSort; 9!XXuMWU<
import org.rut.util.algorithm.support.ImprovedQuickSort; !m {d6C[
import org.rut.util.algorithm.support.InsertSort; 1 sJtkge:
import org.rut.util.algorithm.support.MergeSort; ;r8< Ed
import org.rut.util.algorithm.support.QuickSort; |-)2 D=P
import org.rut.util.algorithm.support.SelectionSort; wqnrN6$jf
import org.rut.util.algorithm.support.ShellSort; )70i/%}7
]#NJ[IZb
/** ~SzHIVj:6
* @author treeroot @"h@4q/W
* @since 2006-2-2 gI T3A*x
* @version 1.0 Qr.SPNUFK
*/ <Jc :a?ICe
public class SortUtil { 9B)<7JJX!J
public final static int INSERT = 1; V|\dnVQ'-%
public final static int BUBBLE = 2; l/i7<q
public final static int SELECTION = 3; a>H8,a
public final static int SHELL = 4; F`Ld WA
public final static int QUICK = 5; #@UzOQ>
public final static int IMPROVED_QUICK = 6; j1~'[
public final static int MERGE = 7; TC* 78;r
public final static int IMPROVED_MERGE = 8; k>.n[`>$6|
public final static int HEAP = 9; xg.o7-^M
1F,>siuh ,
public static void sort(int[] data) { F1A7l"X]
sort(data, IMPROVED_QUICK); h uIvXl
} 2kfX_RK
private static String[] name={ z)_h"y?H{%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *Y]()#?Gr
}; '$0~PH&
dX;Q\ ]"
private static Sort[] impl=new Sort[]{ PZ.q
new InsertSort(), NsN =0ff
new BubbleSort(), PdD,~N#
new SelectionSort(), oMeIXb)z
new ShellSort(), .|g|X8X
new QuickSort(), (:r80:
new ImprovedQuickSort(), ^Q9!DF m
new MergeSort(), _`~\zzUZ
new ImprovedMergeSort(), i"RBk%
new HeapSort() %8c2d
}; ,!>1A;~wT
7^FJ+gN8b
public static String toString(int algorithm){ S{fFpe-
return name[algorithm-1]; p*C|kEqk
} vrX@T?>
IBm"VCg{Ew
public static void sort(int[] data, int algorithm) { y!u=]BE
impl[algorithm-1].sort(data); | k?r1dj%O
} Ftw;T|
U-ADdOh"q
public static interface Sort { 8Cef ]@x
public void sort(int[] data); |PxTm
} [BZA1,
chakp!S=
public static void swap(int[] data, int i, int j) { ]AB'POa
int temp = data; TjY-C m
data = data[j]; U#6<80Ke
data[j] = temp; Yaix\*II
} M]7>Ar'zsG
} 60z8U#upM