[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; sp9gz~Kq
} J=4>zQLW
int i1=l; UM}u(;oo%)
int i2=mid+1; $vO&C6m$
for(int cur=l;cur<=r;cur++){ O] _4pP
if(i1==mid+1) 7nZPh3%
data[cur]=temp[i2++]; G#M)5'Q]U
else if(i2>r) C0rf
data[cur]=temp[i1++]; !40>LpL[
else if(temp[i1] data[cur]=temp[i1++]; !3ggQG!e
else d[ N1zQW
data[cur]=temp[i2++]; ~%TWF+
} gEASYIQ
} \bA Yic
Z:;}
} C@rGa7
R%E7 |NAG
改进后的归并排序: bS.w<V Ew
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package org.rut.util.algorithm.support; YIU3}sJ!
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import org.rut.util.algorithm.SortUtil; >tD=t8
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/** IgT`on3Y
* @author treeroot &4#Zi.]
* @since 2006-2-2 bp1AN9~
* @version 1.0 .8hI ad
*/ 2hE(h
public class ImprovedMergeSort implements SortUtil.Sort { Ia&R/I
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private static final int THRESHOLD = 10; 2|1fb-AR
&hCbXs=
/* '6KvB
* (non-Javadoc) <N<Q9}`V
* +Y\:Q<eMFg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) I7f ^2
*/ f)I5=Ijy(
public void sort(int[] data) { tF2"IP.
int[] temp=new int[data.length]; c/{FDN
mergeSort(data,temp,0,data.length-1); ,Z.sGv
} BHXi g~d
6CJMQi,kn
private void mergeSort(int[] data, int[] temp, int l, int r) { 8;PkuJR_]
int i, j, k; yNTd_XPL
int mid = (l + r) / 2; DE?v'7cmA
if (l == r) &W `xZyb3
return; UZZJtQt
if ((mid - l) >= THRESHOLD) 9KSi-2?H
mergeSort(data, temp, l, mid); _IH" SVub
else rg/{5f
insertSort(data, l, mid - l + 1); DwD$T%kF
if ((r - mid) > THRESHOLD) b7Y g~Lw
mergeSort(data, temp, mid + 1, r); 74s{b]jN'-
else |<%!9Z
insertSort(data, mid + 1, r - mid); KKeMi@N
%!|w(Povq
for (i = l; i <= mid; i++) { }d$-:l,w
temp = data; L`NIYH<^
} JAbUK[:K
for (j = 1; j <= r - mid; j++) { BD g]M/{
temp[r - j + 1] = data[j + mid]; <@<rU:o=V
} J[ds.~ $
int a = temp[l]; gN&i&%*!
int b = temp[r]; V\~.
for (i = l, j = r, k = l; k <= r; k++) { 5dBftTv?
if (a < b) { %36x'Dn?
data[k] = temp[i++]; }xZi Ct
a = temp; &&ioGy}1
} else { %pWn9
data[k] = temp[j--]; 6iC>CY3CG
b = temp[j]; bbm\y] !t
} dZM^?rq
} oy+|:[v:Fk
} +2uSMr
qA*~B'
/** F_-Lu]*
* @param data j!;LN)s@?
* @param l W{p}N
* @param i <,d550GSm
*/ 37AVk`a
private void insertSort(int[] data, int start, int len) { 5>532X(0
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j;x()iZ<
} ez4!5&TzRm
} *MF9_V)8V
} J0G@]H
} ">uN={Iy
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堆排序： H`EhsYYK
gY}In+S
package org.rut.util.algorithm.support; Hxu5Dx5![
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import org.rut.util.algorithm.SortUtil; _0/unJl`
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/** k.@![w\ea
* @author treeroot Z9{~t
* @since 2006-2-2 Hq@+m!
* @version 1.0 !oLn=
*/ sJHVnMA
public class HeapSort implements SortUtil.Sort{ ;m/e|_4;y
nF3}wCe)
/* (non-Javadoc) &|>@K#V8-;
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &(F c .3m
*/ g` rr3jP
public void sort(int[] data) { =]5tYIU
MaxHeap h=new MaxHeap(); T:}Q3
h.init(data); ~o}:!y
for(int i=0;i h.remove(); PK\ZRl
System.arraycopy(h.queue,1,data,0,data.length); n.%QWhUB
} >KKWhJ
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private static class MaxHeap{ 3i^X9[.
F%>$WN#2
void init(int[] data){ C=D*
this.queue=new int[data.length+1]; 1ni+)p>]
for(int i=0;i queue[++size]=data; XcR=4q|7
fixUp(size); WP<L9A
} N['DqS =
} 1v@#b@NXM7
W/'1ftn?D
private int size=0; 0cG'37[
bWPsfUn#
private int[] queue; z4u&#.bU
]HKt7 %,
public int get() { jP@ @<dt
return queue[1]; {QG.> lB
} a`O'ZY
.jrNi=BP*
public void remove() { .#EU@Hc
SortUtil.swap(queue,1,size--); h*w9{[L
fixDown(1); w[~G^x&
} m^X51,+<
file://fixdown )g5?5f;
private void fixDown(int k) { OVK )]- ~
int j; 84ij4ZYe
while ((j = k << 1) <= size) { tBo\R?YRs
if (j < size %26amp;%26amp; queue[j] j++; An2>]\L
if (queue[k]>queue[j]) file://不用交换 Kda'N$|`
break; mc{z
SortUtil.swap(queue,j,k); !Ko2yn}6l
k = j; 3(YvqPp&
} qs4jUm
} r@G*Fx8Z
private void fixUp(int k) { *ug~LK5Y.
while (k > 1) { \w9}O2lL
int j = k >> 1; Tigw+2
if (queue[j]>queue[k]) 6St=r)_
break; |Xt G9A>
SortUtil.swap(queue,j,k); xAmtm"
k = j; S^O9}<2g
} !'f7;%7s
} q4ROuE|d
@ @[xTyA
} Nt>^2Mv
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} EJ:O 1
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SortUtil： 3%v)!dTa<^
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package org.rut.util.algorithm; #W\}v(Ke
;i@S}LwL
import org.rut.util.algorithm.support.BubbleSort; Yf0 KG
import org.rut.util.algorithm.support.HeapSort; =VC18yA
import org.rut.util.algorithm.support.ImprovedMergeSort; I}f`iBG
import org.rut.util.algorithm.support.ImprovedQuickSort; @SfQbM##%
import org.rut.util.algorithm.support.InsertSort; IDct!53~
import org.rut.util.algorithm.support.MergeSort; k 9i W1
import org.rut.util.algorithm.support.QuickSort; :EX>Y<`]
import org.rut.util.algorithm.support.SelectionSort; fWHvVyQ.
import org.rut.util.algorithm.support.ShellSort; 4v[y^P
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/** s'HsLe0|
* @author treeroot 2 6#p,P
* @since 2006-2-2 y3~=8!Tj?Q
* @version 1.0 b6k`R4S3
*/ o78u>Oy
public class SortUtil { sn"((BsO<
public final static int INSERT = 1; Ny^ 1#R
public final static int BUBBLE = 2; jY6GWsh:9
public final static int SELECTION = 3; %QP[/5vQ
public final static int SHELL = 4; *_D/_Rp7
public final static int QUICK = 5; N{J 1C6
public final static int IMPROVED_QUICK = 6; 0O3O^ 0
public final static int MERGE = 7; XgxE M1(
public final static int IMPROVED_MERGE = 8; 2w|5SK_
public final static int HEAP = 9; gL<n?FG4b
qu B[S)2}
public static void sort(int[] data) { 5 -i,Tx&:
sort(data, IMPROVED_QUICK); !h?HfpYv
} ~J\qkQ
private static String[] name={ vF\>;pcT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N+&uR!:.C
}; >u=
"FHJ_$!
private static Sort[] impl=new Sort[]{ Q,?_;,I}
new InsertSort(), xG!~TQ
new BubbleSort(), ^ `LqNG
new SelectionSort(), P2n8HFi
new ShellSort(), cSL6V2F
new QuickSort(), *\ii+f-
new ImprovedQuickSort(), I`_2Q:r
new MergeSort(), (%_X{R'
new ImprovedMergeSort(), l";Yw]:^
new HeapSort() f' A$':Y
}; fHiL%]z
ElO|6kOBYG
public static String toString(int algorithm){ ?G`m;S
return name[algorithm-1]; _E'?U
} CL0lMZ
-A#p22D,5
public static void sort(int[] data, int algorithm) { kcS7)"/ zC
impl[algorithm-1].sort(data); i1evB9FZ1z
} $J1`.Q>)4
rHKO13WF
public static interface Sort { ^ZMbJe%L
public void sort(int[] data); O Z ./suR)
} $RDlM
IuY9Q8
public static void swap(int[] data, int i, int j) { |WB-Ng
int temp = data; ixA.b#!1
data = data[j]; 8N&'n
data[j] = temp; oAO{4xP
} XG|N$~N+2
} |d0ZB_ci