[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; BAf$tyh
} Y@UkP+{f=
int i1=l; j3gDGw;
int i2=mid+1; UEU/505
for(int cur=l;cur<=r;cur++){ =dmr,WE
if(i1==mid+1) T5(S2^)o
data[cur]=temp[i2++]; iwotEl0*{
else if(i2>r) ,`@pi@<"#
data[cur]=temp[i1++]; 7?$?Yu
else if(temp[i1] data[cur]=temp[i1++]; j/FLEsU!R
else 5*AXL.2ih
data[cur]=temp[i2++]; Zt`Tg7m
} 4:`D3
} D 2X_Yv
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} O G`8::S
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改进后的归并排序: /Mqhx_)>A
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package org.rut.util.algorithm.support; /yOx=V
/wV|;D^ )
import org.rut.util.algorithm.SortUtil; 3Q=^&o0fl
Gv:~P_vBH[
/** Ri.tA
* @author treeroot #BC"bY
* @since 2006-2-2 'nmA!s
* @version 1.0 |$RNY``J
*/ 2KlQ[z4Ir
public class ImprovedMergeSort implements SortUtil.Sort { f"ZlJVa
~}Xus?e
private static final int THRESHOLD = 10; IH]9%d)
YX\vk/[|
/* J|`0GDSn
* (non-Javadoc) #b/qR^2qW
* '7Gv_G_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h051Ol\v*
*/ I;(3)^QH#
public void sort(int[] data) { |#oS7oV(
int[] temp=new int[data.length]; /*K2i5&X
mergeSort(data,temp,0,data.length-1); #B `?}a=
} ;_o]$hV|
|>.Q U3
private void mergeSort(int[] data, int[] temp, int l, int r) { Cp8=8N(Xb
int i, j, k; Nwvlv{k'
int mid = (l + r) / 2; EBj^4=b[
if (l == r) v pI9TG
return; aurs~
if ((mid - l) >= THRESHOLD) 2u"lc'9v
mergeSort(data, temp, l, mid); 1F@k9[d~
else =BJe)!b
insertSort(data, l, mid - l + 1); <W4F`6`x
if ((r - mid) > THRESHOLD) $v^hzC
mergeSort(data, temp, mid + 1, r); ,eXtY}E
else w5@5"M
insertSort(data, mid + 1, r - mid); _?{7%(C
x9_mlZ
for (i = l; i <= mid; i++) { 2hh8G5IaQ
temp = data; Y'v[2s
} i5,iJe0cA
for (j = 1; j <= r - mid; j++) { ).T&fa"
temp[r - j + 1] = data[j + mid]; -%nD'qy,.
} 18X@0e
int a = temp[l]; g3R(,IH
int b = temp[r]; Syk)S<
for (i = l, j = r, k = l; k <= r; k++) { ?,} u6tH
if (a < b) { $3-vW{<
data[k] = temp[i++]; +>$]leqa
a = temp; Q;h.}N8W
} else { _Nx /<isdL
data[k] = temp[j--]; g'0CYY
b = temp[j]; ^D yw(>9
} {e|qQ4~h
} |VfEp
} 'h>uR|
|V9[aa*c
/** d*(aue=
* @param data 1b,a3w(:1
* @param l Cux(v8=n
* @param i 8{ zX=
*/ `Q]N]mK
private void insertSort(int[] data, int start, int len) { &Y@i:O
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); }X(&QZ7i`
} +mQ5\14#
} =L6#=7hcl
} Gp"GTPT{
} ?J}Q&p.
$( hT{C,K
堆排序： $] 6u#5
@MW@mP)#
package org.rut.util.algorithm.support; +-9vrEB
g=*jKSZ
import org.rut.util.algorithm.SortUtil; 7|rH9Bc{U
tne_]+
/** sZ;|NAx)
* @author treeroot D6 B-#u!M
* @since 2006-2-2 @^{Hq6_`
* @version 1.0 nJDGNm,
*/ Kxe\H'rR
public class HeapSort implements SortUtil.Sort{ G\.~/<Mg+
]9@:7d6
/* (non-Javadoc) *S$vSDJCW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) JA^o/%a^
*/ ^X#y'odtbS
public void sort(int[] data) { |,8z"g
MaxHeap h=new MaxHeap(); |s8N
h.init(data); M`MxdwR
for(int i=0;i h.remove(); c-LzluWi
System.arraycopy(h.queue,1,data,0,data.length); N& _~y|
} L/3A g* ]
.RD<]BxJ
private static class MaxHeap{ =c8}^3L~7
7"(!]+BW!O
void init(int[] data){ TBlSZZ-55]
this.queue=new int[data.length+1]; k,h602(
for(int i=0;i queue[++size]=data; d{z[46>
fixUp(size); jhu &Wh
} "c^!LV
} aDlp>p^E>
Fs+tcr/\[
private int size=0; O zAIz+`
4kOO3[r
private int[] queue; )G[byBa
% rBzA<
public int get() { k.J%rRneN
return queue[1]; [4)Oi-_Y>
} b3(*/KgK
9A.RD`fg
public void remove() { m5Bf<E,c
SortUtil.swap(queue,1,size--); bR\7j+*&
fixDown(1); XS<>0YM
} [W[{ 4 Xu
file://fixdown bS_#3T
private void fixDown(int k) { ~.a"jYb7A}
int j; ggso9ZlLu+
while ((j = k << 1) <= size) { WBe0^=x
if (j < size %26amp;%26amp; queue[j] j++; 4GYi'
if (queue[k]>queue[j]) file://不用交换 z^Hc'oVXj:
break; 0<M-asI?
SortUtil.swap(queue,j,k); W.wPy@yi
k = j; $8EEtr,!
} @"w4R6l+*
} CH++3i2&
private void fixUp(int k) { *TOdIq&z
while (k > 1) { .i0K-B
int j = k >> 1; wj[yo S
if (queue[j]>queue[k]) K_Y-N!h
break; 01kRe
SortUtil.swap(queue,j,k); rPxRGoR
k = j; bM W|:rn
} F.s$Y+c!6
} 2.qPMqH
H MOIUd
} dSI"yz
VRo&1:
} \;;M")$
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SortUtil： *v<f#hB"
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package org.rut.util.algorithm; unDW2#GX
iTxWXij
import org.rut.util.algorithm.support.BubbleSort; _"DC)
import org.rut.util.algorithm.support.HeapSort; r6<;bO(
import org.rut.util.algorithm.support.ImprovedMergeSort; S ?Zh#`(*
import org.rut.util.algorithm.support.ImprovedQuickSort; s{^98*
import org.rut.util.algorithm.support.InsertSort; }U]jy
import org.rut.util.algorithm.support.MergeSort; {i;,Io7W
import org.rut.util.algorithm.support.QuickSort; bpu`'Vx
import org.rut.util.algorithm.support.SelectionSort; Iu'9yb
import org.rut.util.algorithm.support.ShellSort; <,vIN,Kl8/
f-U zFlU
/** "M%R{pGA7
* @author treeroot 8t+eu O
* @since 2006-2-2 ;`AB-
* @version 1.0 U32$9"
*/ 7H H
public class SortUtil { ~E}kwF
public final static int INSERT = 1; %0\@\fC41
public final static int BUBBLE = 2; Sv=YI
public final static int SELECTION = 3; dCx63rF`G
public final static int SHELL = 4; uYW4$6S3
public final static int QUICK = 5; >`QBN1 Y
public final static int IMPROVED_QUICK = 6; l5z//E}W
public final static int MERGE = 7; =4TQ*;V:
public final static int IMPROVED_MERGE = 8; $v>q'8d
public final static int HEAP = 9; A;cA|`b
_|~Dj)z
public static void sort(int[] data) { =<\22d5L
sort(data, IMPROVED_QUICK); 1UQ,V`y
} xU'z>y4V$
private static String[] name={ 2H%9l@}u
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ` w;Wud'*<
}; T!/o^0w
"LlpZtw
private static Sort[] impl=new Sort[]{ >Eh U{@Y
new InsertSort(), s.M39W?
new BubbleSort(), p.:651b
new SelectionSort(), wm@m(ArE=
new ShellSort(), 5Fydh0.
new QuickSort(), @ZEBtM%.O
new ImprovedQuickSort(), py6<QoGV
new MergeSort(), a)|y0w)vV
new ImprovedMergeSort(), L: $ `8
new HeapSort() a\sK{`|X*
}; DJGafX^
9.)z]Gav
public static String toString(int algorithm){ zC50 @S3|
return name[algorithm-1]; ~EtGR # N
} v^A+LZ*d
QQ?t^ptv
public static void sort(int[] data, int algorithm) { Y9BQLu4F
impl[algorithm-1].sort(data); 8W3zrnc
} 5OM#_.p
le*+(aw
public static interface Sort { :N8n6)#1=
public void sort(int[] data); d` GN!^
} \? /'
Whd >
public static void swap(int[] data, int i, int j) { X5owAc6
int temp = data; $Sc_E:`]
data = data[j]; _'D(>e?
data[j] = temp; 6R :hsC$
} w!lk&7Q7Z
} zJXK:/