[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; LKG|S<s
} tH!z7VZ
int i1=l; d'J?QH!N0
int i2=mid+1; N%i<DsK.u6
for(int cur=l;cur<=r;cur++){ 9~af\G
if(i1==mid+1) {u][q &n
data[cur]=temp[i2++]; id9T[^h
else if(i2>r) +u.L6GcB
data[cur]=temp[i1++]; f%l#g]]
else if(temp[i1] data[cur]=temp[i1++]; >b${rgCvQ
else tq93 2M4
data[cur]=temp[i2++]; M_uij$1-
} #&gy@!a~
} t:n|0G(
OOwJ3I >]>
} c9={~
Q&;qFv5-l
改进后的归并排序: Q:=/d$*xd
k9?+9bExXA
package org.rut.util.algorithm.support; 40ZB;j$l
c *noH[
import org.rut.util.algorithm.SortUtil; arrcHf4O
o%7yhCY
/** D/>5\da+y
* @author treeroot a-=apD1RvG
* @since 2006-2-2 w+D5a VJ
* @version 1.0 |U0@(H
*/ 9_$Odc%]
public class ImprovedMergeSort implements SortUtil.Sort { `Nr7N#g+u
Qgi:q
private static final int THRESHOLD = 10; "+_0idpF
6<6_W#
/* iDN,}:<V
* (non-Javadoc) Grv|Wuli
* m#p^'}]!;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D.f=!rT7E7
*/ wxrT(x|
public void sort(int[] data) { 0^^i=iE-u
int[] temp=new int[data.length]; YO61 pZY
mergeSort(data,temp,0,data.length-1); aT[7L9Cw
} Z2 4 m
"yk%/:G+
private void mergeSort(int[] data, int[] temp, int l, int r) { 2 {0VyLx
int i, j, k; ,|/$|$'
int mid = (l + r) / 2; omu&:) g
if (l == r) BO|Jrr>
return; 9NAlgET
if ((mid - l) >= THRESHOLD) sq$|Pad[
mergeSort(data, temp, l, mid); 6Rj X
else RPQ)0.O7
insertSort(data, l, mid - l + 1); X'<xw
if ((r - mid) > THRESHOLD) mYvm_t9
mergeSort(data, temp, mid + 1, r); <hdCO< 0(
else *WG}K?"/
insertSort(data, mid + 1, r - mid); <NO~TBHF
TMBdneS-s
for (i = l; i <= mid; i++) { I&c#U+-A'
temp = data; on$a]zx'@
} l|{<!7a
for (j = 1; j <= r - mid; j++) { v2Y=vr
temp[r - j + 1] = data[j + mid]; ){~.jP=-#
} 1g+<`1=KT
int a = temp[l]; V}?5=f'
int b = temp[r]; DEhA8.v
for (i = l, j = r, k = l; k <= r; k++) { @So"(^
if (a < b) { ~sD'pS
data[k] = temp[i++]; /jAs`"U
a = temp; T~Cd=s(T"
} else { ' r/1+.
data[k] = temp[j--]; WDq3K/7\
b = temp[j]; -M}iDBJx>#
} AH+J:8k
} 0Og =H79<
} I6_+3}Hm{
oxZ(qfjS
/** ~c"c9s+o
* @param data y-mmc}B>N
* @param l xC(PH?_
* @param i ^8)d8?}
*/ *k -UQLJ
private void insertSort(int[] data, int start, int len) { Z"u/8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &V$R@~x
} @,vSRns
} T7`Jtqf
} v.MWO]L
} 4m:E:zVn
vbp)/I-h
堆排序： )C[8#Q-:
]Az >W*Y
package org.rut.util.algorithm.support; QG.FW;/L,
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import org.rut.util.algorithm.SortUtil; !*;)]j
AF !_!qc;
/** sXTO`W/
* @author treeroot H{8\<E:V+}
* @since 2006-2-2 I5mS!m/X
* @version 1.0 -oj@ c OZ
*/ ;_!;D#:
public class HeapSort implements SortUtil.Sort{ fi1UUJ0 U;
c<=1,TB"-_
/* (non-Javadoc) 'JydaF~>
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !VW#hc\A5
*/ :n=+$Dq
public void sort(int[] data) { R0>L[1o
MaxHeap h=new MaxHeap(); '@FKgy;B)-
h.init(data); sx;1V{|g
for(int i=0;i h.remove(); y< 84Gw_
System.arraycopy(h.queue,1,data,0,data.length); 5o?bF3
} /dAIg1ra
YL]x>7T~4t
private static class MaxHeap{ /D12N'VaE
VCIG+Gz
void init(int[] data){ DIY WFVh
this.queue=new int[data.length+1]; YG_3@`-<
for(int i=0;i queue[++size]=data; 4s~o
fixUp(size); 01J.XfCd6
} :3k(=^%G!
} JW$#~"@r
BmZd,}{
private int size=0; <M=K!k
$d'Gh2IGA
private int[] queue; <_+8c{G
BN=,>-O%
public int get() { PQ j_j#0
return queue[1]; \K=Jd#9c
} &Z?uK,8
jm!G@k6TA
public void remove() { W;1Hyk
SortUtil.swap(queue,1,size--); CzgLgh;:T
fixDown(1); :mij%nQ>$
} j$,`EBf`:<
file://fixdown &wJ"9pQ~6E
private void fixDown(int k) { plca`
int j; p&7>G-.
while ((j = k << 1) <= size) { xk,E A U
if (j < size %26amp;%26amp; queue[j] j++; MxYCMe4S[
if (queue[k]>queue[j]) file://不用交换 qz 'a.]{=
break; Wl1%BN0>
SortUtil.swap(queue,j,k); ^vzNs>eJ
k = j; W!{uEH{%l
} &{>~|^
} /)|*Vzu
private void fixUp(int k) { GB0] |z5
while (k > 1) { [mhY_Hmz]
int j = k >> 1; -C\m'T,1
if (queue[j]>queue[k]) Fw|5A"9'a'
break; iS"rMgq
SortUtil.swap(queue,j,k); x`$4
k = j; U7OW)tUf
} :)+cI?\#
} Tsa&R:SE
9s}--_k?F2
} h5~tsd}OU
W>Zce="_gN
} ?wmr~j
|XQ!xFB
SortUtil： '1d-N[
P/27+5(|
package org.rut.util.algorithm; !=a8^CV
Es?~Dd
import org.rut.util.algorithm.support.BubbleSort; $Uzc
import org.rut.util.algorithm.support.HeapSort; @r#>-p
import org.rut.util.algorithm.support.ImprovedMergeSort; &.d~ M1Mz
import org.rut.util.algorithm.support.ImprovedQuickSort; aFLm,
import org.rut.util.algorithm.support.InsertSort; JV@>dK8
import org.rut.util.algorithm.support.MergeSort; ce@(Ct
import org.rut.util.algorithm.support.QuickSort; -IPc;`<
import org.rut.util.algorithm.support.SelectionSort; 2rA`y8g(L
import org.rut.util.algorithm.support.ShellSort; h4V.$e<T&
hNQ,U{`;^
/** 6,k}v:
* @author treeroot !dZHG R
* @since 2006-2-2 A w83@U
* @version 1.0 MVV<&jho{^
*/ Zcc6E2
public class SortUtil { xX}vxhN
public final static int INSERT = 1; IKpNc+;p
public final static int BUBBLE = 2; 67d0JQTu
public final static int SELECTION = 3; -E.EI@"
public final static int SHELL = 4; \OOj]gAe
public final static int QUICK = 5; vQA: \!
public final static int IMPROVED_QUICK = 6; tvP"t{C6,
public final static int MERGE = 7; JTx&_Ok#
public final static int IMPROVED_MERGE = 8; REw!@Y."
public final static int HEAP = 9; tvI~?\Ylj
3dXyKi
public static void sort(int[] data) { Hq=RtW2
sort(data, IMPROVED_QUICK); 4rv3D@E
} .a$][Jny
private static String[] name={ S53[K/dZo
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Nhs]U`s(g
}; # *\PU
dq[CT
private static Sort[] impl=new Sort[]{ UeE&rA]
new InsertSort(), ,rQznE1e
new BubbleSort(), \ ddbqg?`
new SelectionSort(), *&LVn)@[`
new ShellSort(), Up`zVN59.
new QuickSort(), (ZDRjBth[
new ImprovedQuickSort(), xZBmQ:s',S
new MergeSort(), PZQ}G*p3
new ImprovedMergeSort(), ceAK;v o
new HeapSort() lv,<[Hw1
}; <jfi"SJu
2Ui)'0
public static String toString(int algorithm){ A2]N :=
return name[algorithm-1]; "#(]{MY
} IS"UBJ6p
Yk[yG;W
public static void sort(int[] data, int algorithm) { 9;kWuP>k4u
impl[algorithm-1].sort(data); 'R= r9_%
} -]HO8}-Rjs
!<@Zf4m
public static interface Sort { 6:J @
public void sort(int[] data); jRzR`>5
} .BZw7 YV
(1*?2u*j
public static void swap(int[] data, int i, int j) { v@[MX- ,8
int temp = data; Z{&PKS
data = data[j]; ^BW V6
data[j] = temp; s\_ ,aI
} RytQNwv3
} qd"*Td