[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; aHN"I
} dlYpbw}W&<
int i1=l; T;6MUmyC
int i2=mid+1; G)amng/
for(int cur=l;cur<=r;cur++){ c}(H*VY2n
if(i1==mid+1) f~VlCdf+
data[cur]=temp[i2++]; 5%}e j)@
else if(i2>r) )]@h}K}
data[cur]=temp[i1++]; X%yG{\6:
else if(temp[i1] data[cur]=temp[i1++]; (d_z\U7l
else A3eCI
data[cur]=temp[i2++]; o=Vs)8W
} .!3e$mhV
} gG?@_ie
bWTfP8gT
} R*r4)+gd
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改进后的归并排序: 3^/w`(-{@
v]k-xn|$j
package org.rut.util.algorithm.support; `w!XO$"]Z
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import org.rut.util.algorithm.SortUtil; [lzd'
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/** yXU.PSG*
* @author treeroot 4\n ~
* @since 2006-2-2 R,3cJ Y_%
* @version 1.0 VM$n|[C~
*/ c{=;lT
public class ImprovedMergeSort implements SortUtil.Sort { WFF?VBT'^
qHk{5O3
private static final int THRESHOLD = 10; 7(84j5zb
${T/b(NM
/* P<vl+&*
* (non-Javadoc) WZ-~F/:c%
* W9?* ~!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wj.t4XG!
*/ mG1~rI
public void sort(int[] data) { ]?}>D?5
int[] temp=new int[data.length]; |.)LZP,
mergeSort(data,temp,0,data.length-1); ^5X?WA,Z99
} .`IhxE~mN
T?RY~GA
private void mergeSort(int[] data, int[] temp, int l, int r) { b<tV>d"Fv
int i, j, k; 72;'8
int mid = (l + r) / 2; $5XAS
if (l == r) w-Ph-L/
return; s&$?m[w
if ((mid - l) >= THRESHOLD) "}71z
mergeSort(data, temp, l, mid); boojq{cvYA
else p4P=T@:
insertSort(data, l, mid - l + 1); TdPd8ig8{
if ((r - mid) > THRESHOLD) wa@Rlzij>
mergeSort(data, temp, mid + 1, r); wh(_<VZ
else M8-8T
insertSort(data, mid + 1, r - mid); Y#@D% a8
1WtE] D
for (i = l; i <= mid; i++) { obvE m[x!Z
temp = data; J|DWT+$#Z
} w^p2XlQ<
for (j = 1; j <= r - mid; j++) { XqwdJND
temp[r - j + 1] = data[j + mid]; %vThbP#mR|
} fsmH];"GD
int a = temp[l]; ^|\?vA
int b = temp[r]; {MEU|9@ Y
for (i = l, j = r, k = l; k <= r; k++) { 'V>+G>U
if (a < b) { 2'}2r ~6
data[k] = temp[i++]; {Y/
a = temp; LaIif_fie^
} else { SMy&K[hJ[
data[k] = temp[j--]; d)AkA\neWo
b = temp[j]; 9"aTF,'F/
} zld>o3K}
} _HL3XT
} tw(2V$J
(l^lS=x
/** <;T7qEIlo
* @param data s1FBz)yCY=
* @param l *Xo f;)Z^
* @param i b$eJH
*/ Eg:p_F*lr
private void insertSort(int[] data, int start, int len) { V:+bq`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); hh{liS% 10
} WT)")0)[
} kO#`m]
} 'GyPl
} @88 efF
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堆排序： i_@RWka<
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package org.rut.util.algorithm.support; &Y>u2OZ
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import org.rut.util.algorithm.SortUtil; {MtB!x
:}z%N7T
/** *LVM}| f
* @author treeroot Ss:,#|
* @since 2006-2-2 f#t^<`7
* @version 1.0 :&%;s*-9
*/ D^{:UbN
public class HeapSort implements SortUtil.Sort{ #.)>geLC>9
lN'/Z&62
/* (non-Javadoc) H-W)Tq_?-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SDwSlwf
*/ (AYS>8O&
public void sort(int[] data) { QFPx4F7(e
MaxHeap h=new MaxHeap(); >N J$ac
h.init(data); m+UdT854
for(int i=0;i h.remove(); (ZK >WoV
System.arraycopy(h.queue,1,data,0,data.length); {p 0'Lc<3n
} x,dv~QU
^j %UZ
private static class MaxHeap{ p#d UL9
p'qH [<s
void init(int[] data){ gxM8IQ
this.queue=new int[data.length+1]; o}A #-
for(int i=0;i queue[++size]=data; (do=o&9pm
fixUp(size); cloI 6%5r
} ]LTc)[5Zj
} oNZW#<K
:$aW@?zAY
private int size=0; 6sl<Z=E#
@3c#\jx
private int[] queue; 2hJ3m+N^
sjgR \`AU
public int get() { ;;!{m(;LS}
return queue[1]; k+$4?/A
} ; ZV^e
acY[?L_6J
public void remove() { ~4MjJKzA
SortUtil.swap(queue,1,size--); p,\bez
fixDown(1); 0t?<6-3`/
} ~#_$?_/(
file://fixdown ddDJXk)!0
private void fixDown(int k) { dY@Tt&k8E
int j; YwWTv
while ((j = k << 1) <= size) { BJxmW's/
if (j < size %26amp;%26amp; queue[j] j++; n "KJB
if (queue[k]>queue[j]) file://不用交换 ptyDv
break; #4 &N0IG
SortUtil.swap(queue,j,k); 8/?uU]#Q
k = j; ]#q7}Sd
} , )pt_"-XA
} X1[R*a/p
private void fixUp(int k) { b%f2"e0g
while (k > 1) { C%?D E@k
int j = k >> 1; Rn(F#tI
if (queue[j]>queue[k]) a 8hv.43
break; IOZ|85u=
SortUtil.swap(queue,j,k); *Gh8nQbh
k = j; 40d9/$uzh
} S%s|P=u
} zHc4e
_&Uo|T
} DD6`k*RIk.
<T.#A8c
} x*"pDI0k)
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SortUtil： t2%@py*bU
m>-^K
package org.rut.util.algorithm; IfmIX+t?
L5qCv -{
import org.rut.util.algorithm.support.BubbleSort; bb0McEQy
import org.rut.util.algorithm.support.HeapSort; 7- 3N
import org.rut.util.algorithm.support.ImprovedMergeSort; iMeRQYW
import org.rut.util.algorithm.support.ImprovedQuickSort; yZ~eLWz
import org.rut.util.algorithm.support.InsertSort; O$umu_
import org.rut.util.algorithm.support.MergeSort; U>B5LU9&
import org.rut.util.algorithm.support.QuickSort; p5# P r
import org.rut.util.algorithm.support.SelectionSort; 8&A|)ur4
import org.rut.util.algorithm.support.ShellSort; JU=\]E@8c
iI@Gyq=
/** s8yTK2v2\
* @author treeroot 0O['-x
* @since 2006-2-2 Jyz$&jqyr'
* @version 1.0 L3=YlX`UL
*/ +?5Uy*$
public class SortUtil { rb}wv16?
public final static int INSERT = 1; vPl6Dasr
public final static int BUBBLE = 2; _Dcc<-.
public final static int SELECTION = 3; ZaUcP6[h
public final static int SHELL = 4; =y-!k)t
public final static int QUICK = 5; K'{W9~9Lq
public final static int IMPROVED_QUICK = 6; (|a$N.e&K
public final static int MERGE = 7; {?>bblw/d
public final static int IMPROVED_MERGE = 8; 0q>NE<L
public final static int HEAP = 9; .iP G/e
r@ T-Hi
public static void sort(int[] data) { C@UJOB
sort(data, IMPROVED_QUICK); )*TW\v`B
} [`zbf_RyO
private static String[] name={ 6Er0o{iI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" THbtu*El
}; +zVcOS*-
UU;-q_H6
private static Sort[] impl=new Sort[]{ 8W1K3[Jj<
new InsertSort(), 5;K-,"UQ
new BubbleSort(), k qY3r &
new SelectionSort(), mOz&6T<|
new ShellSort(), RP|>&I
new QuickSort(), z7@(uIl=X
new ImprovedQuickSort(), y[^k*,= 9
new MergeSort(), 7i+!^Qj?y
new ImprovedMergeSort(), _,Rsl$Tk'
new HeapSort() L&DF,fWsF&
}; a$xeiy9
8=n9hLhqo
public static String toString(int algorithm){ Q2[prrk%j
return name[algorithm-1]; :p\(y
} ,{uW8L
Mf;|z0UX
public static void sort(int[] data, int algorithm) { u^aFj%}]L
impl[algorithm-1].sort(data); ?x5wS$^q<
} T]Tdx.B
v ]/OAH6D
public static interface Sort { *gM,x4Y
public void sort(int[] data); ~$&:NB1~q
} l\T!)Ql
(<bm4MPf
public static void swap(int[] data, int i, int j) { /i-xX*
int temp = data; Sc4obcw%
data = data[j]; cQ3W;F8|n
data[j] = temp; nOAJ9
} Ge^zX$.'
} E-yT