[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; B<,YPS8w
} Zh'&-c_J
int i1=l; d1G8*YO@
int i2=mid+1; /{*$JF
for(int cur=l;cur<=r;cur++){ Qihdn66
if(i1==mid+1) VteEDL/w
data[cur]=temp[i2++]; #{PmNx%M
else if(i2>r) ppN} k)m
data[cur]=temp[i1++]; KY.ZT2k
else if(temp[i1] data[cur]=temp[i1++]; 76@qHTh}
else Q2QY* A
data[cur]=temp[i2++]; f~ U.a.Fb
} >5ChcefH
} ,;jGJr
v("wKHWTI@
} 6N" l{!
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改进后的归并排序: MKg,!TELe
2*1ft>Uty
package org.rut.util.algorithm.support; 7x k|+!
/+[63=fl
import org.rut.util.algorithm.SortUtil; 1@qgF
[Qj;/
/** <]d LX}C)
* @author treeroot E=w3=\JP
* @since 2006-2-2 nc?B6IV
* @version 1.0 lm0N5(XP
*/ c$h9/H=~
public class ImprovedMergeSort implements SortUtil.Sort { h"W8N+e\
5zB~4u
private static final int THRESHOLD = 10; g0&\l}&%U
qTmD'2
/* ,hRN\Kt)p
* (non-Javadoc) $>q@SJ1q
* !#N\b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N#k61x
*/ r{K;|'d%h
public void sort(int[] data) { (f#b7O-Wn
int[] temp=new int[data.length]; 'EhBRU%
mergeSort(data,temp,0,data.length-1); L%h/OD
} >I'%!E;
-x*2t;%z{U
private void mergeSort(int[] data, int[] temp, int l, int r) { MesRa(
int i, j, k; ,o#kRWRG
int mid = (l + r) / 2; |i7a@'0)
if (l == r) 8%:]W^
return; C9~~O~7x
if ((mid - l) >= THRESHOLD) #R&H&1
mergeSort(data, temp, l, mid); 4N>>+]MWc
else TqAPAHg
insertSort(data, l, mid - l + 1); 1hmc,c
if ((r - mid) > THRESHOLD) )!W45"l-3M
mergeSort(data, temp, mid + 1, r); CIC[1,
else Lx[ ,Z,kD
insertSort(data, mid + 1, r - mid); Wf26
|ys0`Vb=$
for (i = l; i <= mid; i++) { %,q.),F
temp = data; anN#5jt
} '%;\YD9
for (j = 1; j <= r - mid; j++) { #x@eDnb_
temp[r - j + 1] = data[j + mid]; =Lp7{09u
} 3$/ 4wH^
int a = temp[l]; q3w1GD
int b = temp[r]; +OHGn;C
for (i = l, j = r, k = l; k <= r; k++) { .*/Fucr
if (a < b) { nk=$B(h
data[k] = temp[i++]; \2e0|)aF6
a = temp; zGlZ!t:
} else { L}k/9F.5
data[k] = temp[j--]; K_&MoyJJ9f
b = temp[j]; 9S7A!AKE
} h2q/mi5{
} >Aq:K^D/3F
} zJN7<sv
BlC<`2S
/** +[-i%b3q
* @param data 5Fw - d
* @param l }IaA7f
* @param i ]uh3R{a/
*/ LHYLC>J
private void insertSort(int[] data, int start, int len) { X$n(-65
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); zu\`1W^
} 0 p uY"[c
} HIvZQQW|
} j}JZ
} q6d~V]4:
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堆排序： ^+|De}`u
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package org.rut.util.algorithm.support; b^CNVdo'
L"(4R^]
import org.rut.util.algorithm.SortUtil; {]N3f[w
:#t*K6dz
/** *%FA:Y
* @author treeroot y/_XgPfWU
* @since 2006-2-2 SZU \i*
* @version 1.0 0y#Ih {L
*/ |V,<+BEi
public class HeapSort implements SortUtil.Sort{ *f+: <=i
/bRg?Q
/* (non-Javadoc) Xl-e !
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E8[T
*/ v3[@1FQ"
public void sort(int[] data) { TLa]O1=Bf.
MaxHeap h=new MaxHeap(); }j{!-&
h.init(data); pox,Im
for(int i=0;i h.remove(); R{hf9R,
System.arraycopy(h.queue,1,data,0,data.length); I/J7rkf
} sy5 Fn~\R
?}P5p^6
private static class MaxHeap{ ^"8wUsP
Hf gz02Z$
void init(int[] data){ G;iEo4\?
this.queue=new int[data.length+1]; y'C-[nk
for(int i=0;i queue[++size]=data; Tny>D0Z#
fixUp(size); Z}6^ve
} R W/z1
} xyh.N)
$7Jo8^RE
private int size=0; 4_?7&G0(
pbXi9|bI
private int[] queue; AONDx3[
clO,}Ph>
public int get() { k+ o|0
return queue[1]; 7A$B{
} vb{i
r#i?j}F}
public void remove() { \_6OCVil
SortUtil.swap(queue,1,size--); ,El!fgL
fixDown(1); 2\D8.nQr
} ;t#]2<d*
file://fixdown LJlZ^kh
private void fixDown(int k) { aBuoHdg;
int j; V&{MQWy
while ((j = k << 1) <= size) { S_(d9GK<
if (j < size %26amp;%26amp; queue[j] j++; KFRw67^
if (queue[k]>queue[j]) file://不用交换 (]2H7X:b
break; kma?v B
SortUtil.swap(queue,j,k); coE&24,0
k = j; .x83Ah`
} Pt,ebL~
} CB\{!
private void fixUp(int k) { z`@^5_
while (k > 1) { jH;Du2w
int j = k >> 1; `6=-WEo
if (queue[j]>queue[k]) pL1i|O
break; hf6f.Z
SortUtil.swap(queue,j,k); o89( h!
k = j; <i\A_qqc/
} C@\{ehG
} knp>m,w
-T@`hk`
} ~EiH-z4U
PyC0Q\$%
} ?i\;:<e4
uYI@9U
SortUtil： y^>Q/H\
v5}X+'
package org.rut.util.algorithm; {lG@hN'
E$s/]wnr[
import org.rut.util.algorithm.support.BubbleSort; <i?a0
import org.rut.util.algorithm.support.HeapSort; ^Mkk@F&1
import org.rut.util.algorithm.support.ImprovedMergeSort; `TqSQg_l
import org.rut.util.algorithm.support.ImprovedQuickSort; Qq& W3
import org.rut.util.algorithm.support.InsertSort; w0m^ &,;#
import org.rut.util.algorithm.support.MergeSort; @exey
import org.rut.util.algorithm.support.QuickSort; :fcM:w&
import org.rut.util.algorithm.support.SelectionSort; c,EBF\r8*
import org.rut.util.algorithm.support.ShellSort; \/`?
=JLh?Wx
/** x+5k <Xi}
* @author treeroot SUCUP<G
* @since 2006-2-2 9Ru;`
* @version 1.0 uLeRZSC
*/ 5v.DX`"
public class SortUtil { <~U4*
public final static int INSERT = 1; gwkb!#A
public final static int BUBBLE = 2; |H}sYp
public final static int SELECTION = 3; 66&EBX}
public final static int SHELL = 4; |iYg >
public final static int QUICK = 5; zSTR^sgJ
public final static int IMPROVED_QUICK = 6; qeL pXe0c
public final static int MERGE = 7; Ji'(`9F&a
public final static int IMPROVED_MERGE = 8; F'PQqb{
public final static int HEAP = 9; Lz9#A.
9;t]Hp_+K
public static void sort(int[] data) { M6|I6M<
sort(data, IMPROVED_QUICK); 5E\#%K[
} +YY8h>hj
private static String[] name={ B1 0+*p(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" #^#Kcg
}; I`RBj`IF
vE, 37
private static Sort[] impl=new Sort[]{ \kIMDg3}
new InsertSort(), @`"AHt
new BubbleSort(), y7\"[<E`(V
new SelectionSort(), .Ce8L&cU
new ShellSort(), OWjJxORB
new QuickSort(), . v)mZp
new ImprovedQuickSort(), 0BPMmk
new MergeSort(), IakKi4(
new ImprovedMergeSort(), NUJ~YWO;
new HeapSort() Wl"0m1G
}; t G.(flW,
,<,:8B
public static String toString(int algorithm){ E|EgB33S
return name[algorithm-1]; H!IshZfktn
} 2C^B_FUg|]
sd re#@n}
public static void sort(int[] data, int algorithm) { \t4tiCw
impl[algorithm-1].sort(data); yoe}$f4
} imL_lw^?
1$lh"fHU
public static interface Sort { 1nhtM
public void sort(int[] data); 5~ 'Ie<Y_
} *ZSdl0e
:\~+#/=:
public static void swap(int[] data, int i, int j) { ~i;fDQ&!
int temp = data; zdun,`6
data = data[j]; #Doq P:
data[j] = temp; O09ke-lC
} ,1{Ep`
} hqSJ(gs{