[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; &vMb_;~B
} 3AtGy'NTp
int i1=l; r.&Vw|*>
int i2=mid+1; [#vH'y
for(int cur=l;cur<=r;cur++){ YQvD|x
if(i1==mid+1) h 0Q5-EA
data[cur]=temp[i2++]; 9d659iC
else if(i2>r) ^98~U\ar
data[cur]=temp[i1++]; Tn e4
else if(temp[i1] data[cur]=temp[i1++]; qOtgve`jX
else :6 R\OeH+
data[cur]=temp[i2++]; `wEb<H
} 20h, ^
} '3fu
s?}e^/"v
} H[$"+&q
;7V%#-
改进后的归并排序: L|7R9+ZG
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package org.rut.util.algorithm.support; ^A/k)x6
g3/W=~r
import org.rut.util.algorithm.SortUtil; 83\pZ1>)_
} 9Eg=%0v
/** B%b4v
* @author treeroot u'DRN,h+
* @since 2006-2-2 xGg )Y#
* @version 1.0 F^BS/Yag
*/ 5coyr`7mP
public class ImprovedMergeSort implements SortUtil.Sort { }!r|1$,kL
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private static final int THRESHOLD = 10; @o _}g !9=
mR:uj2*
/* Ya"a`ozq
* (non-Javadoc) =s2*H8]
* osAd1<EIC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f}f9@>.
*/ >*_$]E
public void sort(int[] data) { S`0(*A[W*
int[] temp=new int[data.length]; Jhhb7uU+
mergeSort(data,temp,0,data.length-1); 7,o7Cf2z
} IfAZn_
5x4yyb'
private void mergeSort(int[] data, int[] temp, int l, int r) { 24*XL,
int i, j, k; pJ"qu,w
int mid = (l + r) / 2; IueFx u
if (l == r) )23H1
return; W+?4jwqw
if ((mid - l) >= THRESHOLD) Ckuh:bs
mergeSort(data, temp, l, mid); <uw9DU7G
else 7'V@+5
insertSort(data, l, mid - l + 1); ZDYJ\}=
if ((r - mid) > THRESHOLD) EgCAsSx(
mergeSort(data, temp, mid + 1, r); .jE{3^
else m@v\(rT.
insertSort(data, mid + 1, r - mid); k"zv~`i'
)U:m:cr<
for (i = l; i <= mid; i++) { SsDmoEeB[
temp = data; qiD@'Va\
} k2tF}
for (j = 1; j <= r - mid; j++) { @9RM9zK.q
temp[r - j + 1] = data[j + mid]; {qJ1ko)$
} L+i=VGm0
int a = temp[l]; BG]#o|KW
int b = temp[r]; ?X<eV1a
for (i = l, j = r, k = l; k <= r; k++) { Zt{[*~
if (a < b) { L48_96
data[k] = temp[i++]; Hd ={CFip
a = temp; A[{yCn`tM
} else { CxW>~O:
data[k] = temp[j--]; ^%{7}g&$u
b = temp[j]; T_5H&;a
} =K[yT:
} "e>;'%W
} P{>!5|k
>jLY"
/** O-hAFKx
* @param data @:vwb\azVD
* @param l `kXs;T6&
* @param i ]Q3ADh
*/ \?k'4rH
private void insertSort(int[] data, int start, int len) { %XQ(fj>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); #r\4sVg
} .|fHy
} 4!yzsPJL
} `mJ6K&t$<
} j>"@,B g*
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堆排序： 5e^ChK0Q
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package org.rut.util.algorithm.support; v$wIm,j
;'@9[N9
import org.rut.util.algorithm.SortUtil; 0=1T.4+=
m&,(Jla
/** `d`T*_
* @author treeroot ^Y \"}D
* @since 2006-2-2 d^ 8ZeC#
* @version 1.0 N<VJ(20y
*/ y??XIsF
public class HeapSort implements SortUtil.Sort{ x g
vXZOy%$o
/* (non-Javadoc) '_FsvHQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) f46t9dxp$
*/ PKiy5D*8p
public void sort(int[] data) { =-n}[Y}A
MaxHeap h=new MaxHeap(); nmKp[-5
h.init(data); 9qzHS~l
for(int i=0;i h.remove(); 0 /U{p,r6`
System.arraycopy(h.queue,1,data,0,data.length); Kis"L(C
} yWo; a
I1M%J@Cz
private static class MaxHeap{ [waIi3Dv\
`b7t4d*
void init(int[] data){ ?IT*:A]E
this.queue=new int[data.length+1]; v PG},m~-
for(int i=0;i queue[++size]=data; hhc,uJ">!
fixUp(size); R-d:j^:f
} o]oum,Q
} u\;C;I-? '
3;]H1 1
private int size=0; F{;((VboN
+VOK%8,p
private int[] queue; BUXpCxQ
JP[K;/
public int get() { y}ev ,j
return queue[1]; c4eBt))}V
} T+H!_ky`A
.4!=p*Y
public void remove() { `Eo.v#<
SortUtil.swap(queue,1,size--); Bn&ze.F
fixDown(1); n9ej7oj
} Z,Dl` w
file://fixdown M!D3}JRm
private void fixDown(int k) { wjB:5~n50k
int j; .|i.Cq8
while ((j = k << 1) <= size) { f(y:G^V
if (j < size %26amp;%26amp; queue[j] j++; S3Xl
if (queue[k]>queue[j]) file://不用交换 ],Do6 @M-
break; ope^~+c~\
SortUtil.swap(queue,j,k); ~dTrf>R8M
k = j; z_4J)?3
} e8?jmN`2
} l}A93jSL
private void fixUp(int k) { M&9+6e'-F
while (k > 1) { 60?%<oJ oH
int j = k >> 1; T!)(Dv8@F
if (queue[j]>queue[k]) {q^[a-h>
break; i2SR{e8:GF
SortUtil.swap(queue,j,k); H9Q&tl9
k = j; O5T{eBo\
} p}U ~+:v
} Yufc{M00
$suzW;{#
} -;WGS o
B>P{A7Q
} )R1<N
^RIl
SortUtil： 0[W:d=C`a
U26}gT)
package org.rut.util.algorithm; 5vnrA'BhBU
4zFW-yy
import org.rut.util.algorithm.support.BubbleSort; @?]RBX?a
import org.rut.util.algorithm.support.HeapSort; A;?|&`f
import org.rut.util.algorithm.support.ImprovedMergeSort; RPL:-
import org.rut.util.algorithm.support.ImprovedQuickSort; P.9>z7l{
import org.rut.util.algorithm.support.InsertSort; lA8`l>I
import org.rut.util.algorithm.support.MergeSort; ]Gq !`O1
import org.rut.util.algorithm.support.QuickSort; ml }{|Yz
import org.rut.util.algorithm.support.SelectionSort; A_q3KB!$=+
import org.rut.util.algorithm.support.ShellSort; U9MxI%tb
((M>s&\y*Y
/** AFE~ v\Gz
* @author treeroot d<P\&!R(
* @since 2006-2-2 NyNXP_8
* @version 1.0 ' %o#q6O
*/ :&."ttf=
public class SortUtil { 8[{ Vu0R
public final static int INSERT = 1; @GW#&\yM
public final static int BUBBLE = 2; g}(L;fy>7
public final static int SELECTION = 3; !%%6dB@%t
public final static int SHELL = 4; Se =`N
public final static int QUICK = 5; *VxgARIL
public final static int IMPROVED_QUICK = 6; i?^L/b`H
public final static int MERGE = 7; =U?dbSf1*
public final static int IMPROVED_MERGE = 8; j/?kL{B
public final static int HEAP = 9; X$W~mQma6
fVpMx4&F
public static void sort(int[] data) { u;2[AQ.
sort(data, IMPROVED_QUICK); #!+:!_45
} 3L}A3de'
private static String[] name={ St*h>V6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" V)N%WXG
}; kc&U'&RgY
\(2sW^fY
private static Sort[] impl=new Sort[]{ sD#.Oq4&]y
new InsertSort(), .U]-j\
new BubbleSort(), 49HZ2`Y
new SelectionSort(), pIqeXY
new ShellSort(), c'yxWZEv
new QuickSort(), C1 *v,i
new ImprovedQuickSort(), r3UUlR/Do
new MergeSort(), 1/J=uH
new ImprovedMergeSort(), t;\Y{`
new HeapSort() 7WZ+T"O{I
}; ePo}y])2
gc$l^`+M
public static String toString(int algorithm){ O3kA;[f;
return name[algorithm-1]; hM@>q&q_
} X45%e!
`3&v6
public static void sort(int[] data, int algorithm) { rmg}N
impl[algorithm-1].sort(data); 7J<5f)
} -e:`|(Mo
Z/+#pWBI!
public static interface Sort { 6(ol1 (U
public void sort(int[] data); oYH-wQj
} C]A.i2o8
DN:EB@
public static void swap(int[] data, int i, int j) { \ }G>8^
int temp = data; k;FUs[
data = data[j]; 3)ywX&4"L
data[j] = temp; ^k9I(f^c-_
} {3aua:q
} -ZLJeY L