[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; BGu<1$G
} LTb#1JC
int i1=l; iWe'|Br
int i2=mid+1; ue!4By8T
for(int cur=l;cur<=r;cur++){ f/,8sGkX;
if(i1==mid+1) qyY/:&E,Z
data[cur]=temp[i2++]; n2'XWbMaL
else if(i2>r) bK!uR&i^l
data[cur]=temp[i1++]; hb)83mH}
else if(temp[i1] data[cur]=temp[i1++]; [4PiQyr
else q((%sWp
data[cur]=temp[i2++]; X:(t,g*7
} iE ,"YCK
} 2ryg3%+O
/(}YjeS
} NZXCaciG
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改进后的归并排序: PL3oV<\4s>
1n>AN.nI
package org.rut.util.algorithm.support; Q$yQ^ mG
Qgo|\=
import org.rut.util.algorithm.SortUtil; W{]r_`=:6S
m='_O+ $
/** @.QuIm8,
* @author treeroot B/JMH 1r
* @since 2006-2-2 MBol_#H
* @version 1.0 Fj&8wZ)v)
*/ [bBPs&7u
public class ImprovedMergeSort implements SortUtil.Sort { ?,eq86-M
[F,s=,S'M
private static final int THRESHOLD = 10; xu'b@G}12
v/Xz.?a\jF
/* }ol<DV
* (non-Javadoc) G98fBw
* IfCa6g<&(
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0A75)T=lQ
*/ Bthp_cSmLs
public void sort(int[] data) { =u5( zaBe
int[] temp=new int[data.length]; 5J6~]J
mergeSort(data,temp,0,data.length-1); lt0byn$vz
} LdX'V]ITh
pEG!j ~
private void mergeSort(int[] data, int[] temp, int l, int r) { _J_QB]t
int i, j, k; ,@8*c0Y~<!
int mid = (l + r) / 2; aq^OzKP?
if (l == r) &&sm7F%
return; S$GWY^5}{
if ((mid - l) >= THRESHOLD) H5A7EZq}`
mergeSort(data, temp, l, mid); ,e*WJh8k[
else AIM<mU
insertSort(data, l, mid - l + 1); <EuS6Pg
if ((r - mid) > THRESHOLD) (+bt{Ma
mergeSort(data, temp, mid + 1, r); hx}X=7w
else ,#(k|Zztc
insertSort(data, mid + 1, r - mid); Tnnj8I1v
{_jbFJ
for (i = l; i <= mid; i++) { s`dUie}y<
temp = data; |Tk'H&
} Qf@ha
for (j = 1; j <= r - mid; j++) { !<0 `c
temp[r - j + 1] = data[j + mid]; ,GF(pCZzG
} fvV5G,lD3h
int a = temp[l]; sN/8OLc
int b = temp[r]; CYhSCT!-?
for (i = l, j = r, k = l; k <= r; k++) { 6{[uCxxl
if (a < b) { BIjkW.uf
data[k] = temp[i++]; $< .wQ8:Q
a = temp; Fma#`{va
} else { rJCu6
data[k] = temp[j--]; \~>7n'd ]
b = temp[j]; H66F4i
} `M,Gsy1h
} >ti)m >f
} <im<0;i&e
G;^,T/q47
/** %Lfy!]Ru
* @param data yO J|t#
* @param l j=PM]
* @param i <*HsJwr)u
*/ EzXi*/
private void insertSort(int[] data, int start, int len) { 9G{#a#Z.
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,y[w`Q\
} 5Ln !>,
} qo:t"x^
} 7k#0EhN1>
} UH7FIM7kX
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堆排序： 8 v<*xy
a)M3t
package org.rut.util.algorithm.support; ujeN|W
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import org.rut.util.algorithm.SortUtil; ?p &Xf>K
J L2g!n= K
/** 'LLpP#(
* @author treeroot $8NM[R.8^4
* @since 2006-2-2 `Wp& 'X
* @version 1.0 #} `pj}tQ
*/ n6#z{,W<3
public class HeapSort implements SortUtil.Sort{ |DXi~
:}ZY*ind
/* (non-Javadoc) 3q0S}<h al
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #i-b|J+%
*/ X;yThb`iI
public void sort(int[] data) { SM[VHNr,-
MaxHeap h=new MaxHeap(); .|2[!7CXH
h.init(data); z_nY>_L83*
for(int i=0;i h.remove(); IMHt#M`
System.arraycopy(h.queue,1,data,0,data.length); K5(:0Q.5y
} uP2Wy3`V
KzLkT7,y+
private static class MaxHeap{ l#3jJn
#}C6}};
void init(int[] data){ Y?JB%%WWI
this.queue=new int[data.length+1]; fOz.kK[]
for(int i=0;i queue[++size]=data; 4siq
fixUp(size); 23P7%\
} /3qKsv#
} @BI;H V%k
~p\r( B7G
private int size=0; )W!\D/C+
ic?(`6N8
private int[] queue; |:LklpdYe
m/ngPeZ
public int get() { [yDOvQ[
return queue[1]; He LW*
} Ap!i-E,"J
<y,c.\c!
public void remove() { ;Bne=vjQp
SortUtil.swap(queue,1,size--); {R5_=MG
fixDown(1); 5_4=(?<
} <O~ieJim
file://fixdown saVX2j6Y
private void fixDown(int k) { r/RX|M
int j; v=x)]<E"_
while ((j = k << 1) <= size) { XiAflO
if (j < size %26amp;%26amp; queue[j] j++; SBamgc
if (queue[k]>queue[j]) file://不用交换 :hDv^D?3
break; 71,GrUV:
SortUtil.swap(queue,j,k); rnM C[
k = j; QTjnXg?Ri
} U]O>DM^'
} rh6 e
private void fixUp(int k) { gmtS3,
while (k > 1) { K,@} 'N
int j = k >> 1; C@@PLsMg
if (queue[j]>queue[k]) !>6`+$=U
break; \r-v]]_<d
SortUtil.swap(queue,j,k); \N)!]jq
k = j; ]N6UY
} qDjH^f
} -hZw.eChQa
;rt\
} Y|-:z@n6C
`6pz9j]
} X9ec*x
5YQJNP
SortUtil： !1`f84d
P&AaD!Qn
package org.rut.util.algorithm; e J:#vX86
{5JYu
import org.rut.util.algorithm.support.BubbleSort; ){4$oXQ
import org.rut.util.algorithm.support.HeapSort; +Q+!#
import org.rut.util.algorithm.support.ImprovedMergeSort; c"NGE
import org.rut.util.algorithm.support.ImprovedQuickSort; )wk9(|[o
import org.rut.util.algorithm.support.InsertSort; 0MN)Z(Sa
import org.rut.util.algorithm.support.MergeSort; 7E R!>l+
import org.rut.util.algorithm.support.QuickSort; L:Me
import org.rut.util.algorithm.support.SelectionSort; q`L}\}o
import org.rut.util.algorithm.support.ShellSort; qmq#(%Z <W
BXUd i&'O
/** "tmr s_~
* @author treeroot JgcMk]|'
* @since 2006-2-2 c)SQ@B@q
* @version 1.0 Q,R|VI6Co
*/ M&0U@ r-
public class SortUtil { 1c:/c|shQ_
public final static int INSERT = 1; /B5rWJ2AS
public final static int BUBBLE = 2; +l>X Z
public final static int SELECTION = 3; e(jD[q
public final static int SHELL = 4; "_ON0._(/
public final static int QUICK = 5; Ob|v$C
public final static int IMPROVED_QUICK = 6; 9zaSA,}
public final static int MERGE = 7; 7lG,.W|
public final static int IMPROVED_MERGE = 8; &}VVr
public final static int HEAP = 9; ,/UuXX
q5>!.v
public static void sort(int[] data) { [`bA,)y"
sort(data, IMPROVED_QUICK); AnQUdU
} ?r^>Vk}
private static String[] name={ *ub"!}$st
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" c1g'l.XL 3
}; 8!7`F.BX
>%85S>e
private static Sort[] impl=new Sort[]{ U6~79Hnt
new InsertSort(), 6#kK
new BubbleSort(), K]ds2Kp&
new SelectionSort(), v8K4u)
new ShellSort(), X9#i!_*
new QuickSort(), #6nuiSF
new ImprovedQuickSort(), }Hb_8P
new MergeSort(), ?cgb3^R'
new ImprovedMergeSort(), 29f4[V X
new HeapSort() T$tO[QR/
}; *TYOsD**9
1#nY Z%
public static String toString(int algorithm){ h~k+!\
return name[algorithm-1]; _j|U>s
} HvW6=d(#
FyRr/0C>
public static void sort(int[] data, int algorithm) { J%8hf%!ud
impl[algorithm-1].sort(data); l,ra24
} c~ Q5A
I3dUI~}u
public static interface Sort { ='fN xabB
public void sort(int[] data); Q$~_'I7~Mz
} ?wMS[Kj
)7a 4yTg!~
public static void swap(int[] data, int i, int j) { mlbSs_LT^
int temp = data; "Fqrk>Q~
data = data[j]; G_6!w//
data[j] = temp; 42wZy|oqp
} H2E'i\
} -<^3!C >