[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; J_fs}Y1q\
} Pd-LDs+Ga
int i1=l; `HO] kJpX
int i2=mid+1; s 0_*^cZ
for(int cur=l;cur<=r;cur++){ (> _Lb
if(i1==mid+1) |rG)Q0H,
data[cur]=temp[i2++]; !dUdz7
else if(i2>r) EeT69o
data[cur]=temp[i1++]; gwdAf%|f
else if(temp[i1] data[cur]=temp[i1++]; KVh#"]<WV
else {bR2S&=OmK
data[cur]=temp[i2++]; N&eo;Ti
} _RUL$Ds
} ^*.+4iHx
hlZ{bO'f
} IC(:RtJ
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改进后的归并排序: z&B9Yu4M7
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package org.rut.util.algorithm.support; F" M
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import org.rut.util.algorithm.SortUtil; N{~P}Sw
.9WOTti
/** ;obOr~Jx'5
* @author treeroot d7mn(= &
* @since 2006-2-2 }2;iIw`
* @version 1.0 <:NahxIlu
*/ B-$?5Ft!
public class ImprovedMergeSort implements SortUtil.Sort { %l14K_
*v]s&$WyO
private static final int THRESHOLD = 10; NL>Trv5
^)I}#
/* G;iH.rCH
* (non-Javadoc) TET=>6
* lM}-'8tt?
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iF":c}$.
*/ /H"fycZ
public void sort(int[] data) { )Tp"l"(G
int[] temp=new int[data.length]; F'sX ^/;
mergeSort(data,temp,0,data.length-1); 7(uz*~Z?`0
} dP+wcl4
MmfBFt*
private void mergeSort(int[] data, int[] temp, int l, int r) { &M@c50&%
int i, j, k; (_8.gS[
int mid = (l + r) / 2; ?|/K(}
if (l == r) dQZdL4
return; 9<&M~(dwT4
if ((mid - l) >= THRESHOLD) JqZt1um
mergeSort(data, temp, l, mid); zi3v,Kq
else iETUBZ
insertSort(data, l, mid - l + 1); ~[dL:=?c
if ((r - mid) > THRESHOLD) }A,!|m4
mergeSort(data, temp, mid + 1, r); KvEv0L<ky
else `GW&*[.7
insertSort(data, mid + 1, r - mid); |59)6/i
|JF,n~n
for (i = l; i <= mid; i++) { *4NY"EwjN
temp = data; gzn:]Y^
} n|6G\99l+M
for (j = 1; j <= r - mid; j++) { Du65>O
temp[r - j + 1] = data[j + mid]; !=PH5jTY
} @TD=or .&
int a = temp[l]; O39
int b = temp[r]; s~2o<#
for (i = l, j = r, k = l; k <= r; k++) { 7<*0fy5nn
if (a < b) { _z8"r&
data[k] = temp[i++]; VFx[{Hy
a = temp; li v=q
} else { CHZ/@gc
data[k] = temp[j--]; WeaT42*Q{
b = temp[j]; H#D:'B j29
} ,zr9*t
} 7M7Lj0Y)L
} 8/(}Wet
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/** wdfbl_`T
* @param data iQ(j_i'+!I
* @param l _pZ <
* @param i A[^#8evaK
*/ dor1(@no|
private void insertSort(int[] data, int start, int len) { |LZ{kD|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); iu(obmh/o
} >r7PK45.K
} ?d%{-
} =X^a
} _u^3uzu
m"/..&'GC
堆排序： NK/y,f6
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package org.rut.util.algorithm.support; m BFNg3_
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import org.rut.util.algorithm.SortUtil; /;+\6(+X
6vAZLNG3
/** X/cb1#
* @author treeroot BJb,
* @since 2006-2-2 &V$cwB
* @version 1.0 h&CZN !
*/ 2ua!<^,
public class HeapSort implements SortUtil.Sort{ 7yT/t1)
*EvW: <
/* (non-Javadoc) )mf|3/o
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Q"D
*/ j0~am,yZ
public void sort(int[] data) { jT$J~MpHh
MaxHeap h=new MaxHeap(); 6xtgnl#T
h.init(data); uA[ :
for(int i=0;i h.remove(); TP {\V>*Yz
System.arraycopy(h.queue,1,data,0,data.length); CEkUXsp
} bRyxP2
%LP4RZ
private static class MaxHeap{ , +J)`+pJx
k<Gmb~Tg1
void init(int[] data){ AVw oOvJ
this.queue=new int[data.length+1]; i0/QfB%O
for(int i=0;i queue[++size]=data; b way+lh
fixUp(size); @@U
} ]s0wJD=
} zps=~|
/7\q#qIm:
private int size=0; ]r0j
bAH<h
private int[] queue; YcX"Z~O6j=
TMY. z
public int get() { 95~bM;TVr
return queue[1]; )Cj1VjAg
} M0xhcU_
G.<0^q,
public void remove() { LYL_Ah'=
SortUtil.swap(queue,1,size--); XZ]ji9'
fixDown(1); !;(Wm6~*ad
} gAorb\iJ
file://fixdown Z;a)P.l.>
private void fixDown(int k) { F7O*%y.';
int j; 4]m{^z`1
while ((j = k << 1) <= size) { dWkQ NFKF
if (j < size %26amp;%26amp; queue[j] j++; LH_H yP_
if (queue[k]>queue[j]) file://不用交换 |[iO./zP
break; 3%(r,AD
SortUtil.swap(queue,j,k); Be@g|'r
k = j; R|(X_A
} NYP3u_ QX
} ~Yg)8
private void fixUp(int k) { :{)uD ;
while (k > 1) { 5PZ7-WJ/
int j = k >> 1; Q&{C%j~N
if (queue[j]>queue[k]) t !6sU]{
break; R|8L'H+1x
SortUtil.swap(queue,j,k); EGqu-WBS
k = j; z-kv{y*Hu
} s<#BxN
} h7fytO
|3E|VGm~
} //|B?4kk
ElpZzGj+
} x3FB`3y~s
r2+ZxMo|
SortUtil： ZT*}KJm
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package org.rut.util.algorithm; 0nCiN;sA
2e1%L,y{W
import org.rut.util.algorithm.support.BubbleSort; YYFS ({
import org.rut.util.algorithm.support.HeapSort; j0+D99{R
import org.rut.util.algorithm.support.ImprovedMergeSort; }%?or_f/
import org.rut.util.algorithm.support.ImprovedQuickSort; 1)h<)
import org.rut.util.algorithm.support.InsertSort; de2G"'F
import org.rut.util.algorithm.support.MergeSort; fi>.X99(G
import org.rut.util.algorithm.support.QuickSort; 7Ko*`-p
import org.rut.util.algorithm.support.SelectionSort; !y~nsy:&7x
import org.rut.util.algorithm.support.ShellSort; *bYU=RS
2>^(&95M
/** wMN;<
* @author treeroot CQ.C{
* @since 2006-2-2 e8dZR3JL
* @version 1.0 ?'a>?al%>
*/ u(8{5"C
public class SortUtil { <)a$5"AP
public final static int INSERT = 1; OqMdm~4B!j
public final static int BUBBLE = 2; BNE:,I*&
public final static int SELECTION = 3; am3.Dt2\
public final static int SHELL = 4; h>*3i#
public final static int QUICK = 5; 3GKKC9C6
public final static int IMPROVED_QUICK = 6; k3t]lGp
public final static int MERGE = 7; u? >x
public final static int IMPROVED_MERGE = 8; ]?T^tJ
public final static int HEAP = 9; qzORv
Tim/7*vx
public static void sort(int[] data) { !:5'MI@
sort(data, IMPROVED_QUICK); [^}bc-9?i
} 8$]SvfX
private static String[] name={ _u6NaB
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Q%q;=a
}; z.RM85?T
b49h @G
private static Sort[] impl=new Sort[]{ n(#yGzq
new InsertSort(), R"HV|Dm|m
new BubbleSort(), @8m%*pBg
new SelectionSort(), =to.Oa RR
new ShellSort(), p|nPu*R-\
new QuickSort(), "{E%Y*
new ImprovedQuickSort(), ~"\v(\Pe
new MergeSort(), Q'3tDc<
new ImprovedMergeSort(), MtPdpm6\
new HeapSort() lx5.50mI
}; 7_Te-i
Z?qLn6y1W
public static String toString(int algorithm){ 1>\V>g9
return name[algorithm-1]; |ITCw$T
} ^Tj{}<yT
4zhh**]B
public static void sort(int[] data, int algorithm) { 2f%+1uU
impl[algorithm-1].sort(data); zBq&/?
} A7#nBHwxZ
Y=Ic<WHR
public static interface Sort { ^fO9oPM|
public void sort(int[] data); KwaxNb5
} ?RsPAL
x\ #K2
public static void swap(int[] data, int i, int j) { p>J@"?%^
int temp = data; 9S9j
data = data[j]; YW~ 9N
data[j] = temp; R#y"SxD()
} /DHV-L
} L1G)/Vkw