[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; 3"28=)o
} N3P!<J/tc
int i1=l; ;#np~gL
int i2=mid+1; R[eQ}7;+
for(int cur=l;cur<=r;cur++){ Da#|}m0>
if(i1==mid+1) <8UqV.&
data[cur]=temp[i2++]; fo63H'7
else if(i2>r) TH_Vw,)
data[cur]=temp[i1++]; D]+0X8@kH7
else if(temp[i1] data[cur]=temp[i1++]; __U;fH{c
else |yE_M-Nc
data[cur]=temp[i2++]; [aM_.[bf
} m5HP56a
} +PC<#
PP+{zy9Sb
} j%%l$i~
]=A=VH&
改进后的归并排序: D#>+]}5@x
ebk{p<
package org.rut.util.algorithm.support; <v<TsEI
;IhkGPpWP
import org.rut.util.algorithm.SortUtil; *G"vV>OSV
V1R=`
/** 'jp nQcwxx
* @author treeroot 9moenkL
* @since 2006-2-2 |RqCw7
* @version 1.0 Wc4K?3 ZM
*/ >SJ# rZ
public class ImprovedMergeSort implements SortUtil.Sort { @";z?xj
-a`EL]NX
private static final int THRESHOLD = 10; Lu&2^USTO
O@U[S.IK
/* AL/`Pqlk
* (non-Javadoc) Ya] qo]
* Y$3H$F.+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @F_#d)+%>
*/ XZhX%OT!
public void sort(int[] data) { 9NwA5TP9_
int[] temp=new int[data.length]; pyK|zvr-r
mergeSort(data,temp,0,data.length-1); Ij>x3L\-
} dbGW`_zQ4
J&~nD(&TY
private void mergeSort(int[] data, int[] temp, int l, int r) { i70TJk$fs
int i, j, k; 4VE7%.z+
int mid = (l + r) / 2; Yck(Fl
if (l == r) Qg+0(odd
return; X#mm Z;P
if ((mid - l) >= THRESHOLD) Yo:l@(
mergeSort(data, temp, l, mid); M-KjRl
else }9fH`C/m
insertSort(data, l, mid - l + 1); d>:(>@wz
if ((r - mid) > THRESHOLD) b?h9G3J_a
mergeSort(data, temp, mid + 1, r); +~J?/
else k))*Sg
insertSort(data, mid + 1, r - mid); &)L2a)
za7h.yK}
for (i = l; i <= mid; i++) { ;J pdnV
temp = data; "HFS5Bj'
} 0j%@P[zQ
for (j = 1; j <= r - mid; j++) { 06 gE;iT
temp[r - j + 1] = data[j + mid]; )F 6#n&2
} yG58?5\9
int a = temp[l]; #V[?puE@
int b = temp[r]; pRmnS;*z&
for (i = l, j = r, k = l; k <= r; k++) { Ltpd:c
if (a < b) { l5S(xQ
data[k] = temp[i++]; H n+1I
a = temp; M*| y&XBe
} else { E!'H,#"P
data[k] = temp[j--]; o9M[Zr1@k
b = temp[j]; *!UY;InanX
} !mK[kXo
} %[4/UD=7
} cs`/^2Vf"#
ke|v|@
/** )'\Jp 7*3
* @param data Rk^Fasg"
* @param l LU4\&fd
* @param i "!XeK|Wi
*/ "s2?cQv{#
private void insertSort(int[] data, int start, int len) { WZ5[tZf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); =25qY"Mf
} }gyJaMA
} ?*E Y~'I
} {rGq|Bj
} +V1EqC*
>b,o yM
堆排序： B?-RzWB\3
P]T(I/\g
package org.rut.util.algorithm.support; j11\t
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import org.rut.util.algorithm.SortUtil; *wP8)yv7
F1R91V|
/** rwFR5
* @author treeroot sF]v$kq
* @since 2006-2-2 Ri4_zb
* @version 1.0 >5wA B
*/ >1a-}>r
public class HeapSort implements SortUtil.Sort{ +,7dj:0S
j2lo~J)
/* (non-Javadoc) fOJk+? c
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +-'qI_xo
*/ :q~qRRmjBe
public void sort(int[] data) { r\vB-nJ
MaxHeap h=new MaxHeap(); xC`Hm?kM
h.init(data); /V~L:0%
for(int i=0;i h.remove(); s8}:8
System.arraycopy(h.queue,1,data,0,data.length); swG^L$r`
} 51.F,uY
_@;2h`q ?
private static class MaxHeap{ @iUzRsl
/}2 bsiJT
void init(int[] data){ 3{Ze>yFE
this.queue=new int[data.length+1]; )&+_T+\
for(int i=0;i queue[++size]=data; Jl Q%+$
fixUp(size); 2F!K }aw
} oF.Fg<p(
} uA C:&
!/< 5.9!9r
private int size=0; =G}_PRn
'e3y|
private int[] queue; D\(,:_ge
@M#2T
public int get() { Ou2H~3^PL
return queue[1]; jm RYL("
} M=yZ5~3
"c!s\iuBU
public void remove() { ||`w MWq
SortUtil.swap(queue,1,size--); }S*6+4
fixDown(1); ;zs*Zd7h M
} =e$ #m;
file://fixdown gywI@QD%#
private void fixDown(int k) { k%hD<_:p
int j; @kvp2P+O
while ((j = k << 1) <= size) { :m#vvH
if (j < size %26amp;%26amp; queue[j] j++; "oz@w'rG
if (queue[k]>queue[j]) file://不用交换 CSr{MF`]e
break; Lom%eoH)
SortUtil.swap(queue,j,k); N#7]xL
k = j; H7Y}qP5X
} !Q.c8GRUQ
} m*i~Vjxj-m
private void fixUp(int k) { u:HKmP;
while (k > 1) { )[p8
int j = k >> 1; `yQHPN0/
if (queue[j]>queue[k]) ^]U2Jd
break; &51/Pm2O
SortUtil.swap(queue,j,k); S<Q1 &],
k = j; S BFhC
} m9L+|r
} UBqK$2 #
I]k'0LG*^
} //J:p,AF
an5Ss@<4AA
} 2$\f !6p
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SortUtil： dH`a|SVW9
50I6:=@\\
package org.rut.util.algorithm; 8U;!1!+ 7)
_I8-0DnOM
import org.rut.util.algorithm.support.BubbleSort; M j5C0P(
import org.rut.util.algorithm.support.HeapSort; `Mjm/9+18
import org.rut.util.algorithm.support.ImprovedMergeSort; W2<X 5'
import org.rut.util.algorithm.support.ImprovedQuickSort; CC)9Ks\
import org.rut.util.algorithm.support.InsertSort; 2sU"p5 j
import org.rut.util.algorithm.support.MergeSort; }K*ri
import org.rut.util.algorithm.support.QuickSort; iEU(1?m2-
import org.rut.util.algorithm.support.SelectionSort; AGv;8'`
import org.rut.util.algorithm.support.ShellSort; PN'8"8`{
TuF:m"4
/** <=zGaU,
* @author treeroot mD=?C
* @since 2006-2-2 yq<YGNy!
* @version 1.0 =?f}h{8x>
*/ 7q\c\qL
public class SortUtil { HhpP}9P;
public final static int INSERT = 1; z N t7DK
public final static int BUBBLE = 2; I}q-J~s
public final static int SELECTION = 3; Qb|dp~K.M
public final static int SHELL = 4; y^nR=Q]_
public final static int QUICK = 5; 9.@(&
public final static int IMPROVED_QUICK = 6; i]YQq!B
public final static int MERGE = 7; (8*lLZ
public final static int IMPROVED_MERGE = 8; =CVw0'yZ
public final static int HEAP = 9; tS9m8(Hr%Q
:J~j*_hZ
public static void sort(int[] data) { t/$xzsoJZr
sort(data, IMPROVED_QUICK); B.WJ6.DkS
} ms{R|vU%b
private static String[] name={ ~H$XSNPi
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Yn#8uaU
}; kzmt'/L8
Cn55%:
private static Sort[] impl=new Sort[]{ Stc\P]%d
new InsertSort(), Ax%BnkU
new BubbleSort(), x3P@AC$\
new SelectionSort(), esHiWHAC
new ShellSort(), "a g_
new QuickSort(), N:<O
new ImprovedQuickSort(), 35>}$1?-6
new MergeSort(), \fhT#/0N
new ImprovedMergeSort(), f8 jaMn9o
new HeapSort() n=&c5!
}; >ob/@
3/AUV%+
public static String toString(int algorithm){ ]M2<I#hF.
return name[algorithm-1]; Lm?*p>\Q
} e?YbG.(E9
A1q^E(}O
public static void sort(int[] data, int algorithm) { Z]Y4NO;
impl[algorithm-1].sort(data); AH`15k_i
} cOb%SC[A{
Wy4^mOv
public static interface Sort { OeYLL4H
public void sort(int[] data); ) b10%n^
} 2UF94
=5`@:!t7
public static void swap(int[] data, int i, int j) { G|lI=Q3f
int temp = data; /;4MexgB%
data = data[j]; !`_f\
data[j] = temp; KV_Ga8hs
} /6zpVkV
} 50&F#v%YB