[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; R:zPU
} +NGjDa
int i1=l; Vv=/{31
int i2=mid+1; AV0m31b
for(int cur=l;cur<=r;cur++){ nQuiRTU<
if(i1==mid+1) cE}R7,y
data[cur]=temp[i2++]; D}|PBR
else if(i2>r) bWzv7#dd=
data[cur]=temp[i1++]; z=TaB^-)
else if(temp[i1] data[cur]=temp[i1++]; }mRus<Ax
else > Y <in/
data[cur]=temp[i2++]; yT Pi/=G
} (are2!Oq
} !w['@x.
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} zk8 o[4
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改进后的归并排序: ^6!C":f
laX(?{_
package org.rut.util.algorithm.support; NG-Wn+W@b
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import org.rut.util.algorithm.SortUtil; yjZ]_.
p<1z!`!P
/** _@CY_`a
* @author treeroot ;Ee!vqD2
* @since 2006-2-2 u.( WW(/N
* @version 1.0 Jy)E!{#x
*/ wD|,G!8E2
public class ImprovedMergeSort implements SortUtil.Sort { #L}YZ
uGm~ Oo
private static final int THRESHOLD = 10; ^R* _Q,o#
RXa&*Jtr -
/* 0z) 8i P
* (non-Javadoc) O)nLV~X
* Js7(TFQE
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) " , c1z\
*/ >r%L=22+
public void sort(int[] data) { "KQ3EI/g
int[] temp=new int[data.length]; dR"H,$UH
mergeSort(data,temp,0,data.length-1); 5b X*8H D
} !@mV$nTA
(lbF/F>v
private void mergeSort(int[] data, int[] temp, int l, int r) { 8Xpf|?.
int i, j, k; K8NoY6
int mid = (l + r) / 2; u"IYAyzL
if (l == r) jf0D
return; OjxaA[$
if ((mid - l) >= THRESHOLD) 2XhtK
mergeSort(data, temp, l, mid); sg"J00
else 3-cCdn
insertSort(data, l, mid - l + 1); 7Q,9j.
if ((r - mid) > THRESHOLD) 8hWBTUN
mergeSort(data, temp, mid + 1, r); USz|Rh
else ;xFx%^M}br
insertSort(data, mid + 1, r - mid); n>]`8+a~%X
C"bG?Mb
for (i = l; i <= mid; i++) { `f.okqBAh
temp = data; Fu4LD-#
} ^lVZW8
for (j = 1; j <= r - mid; j++) { &$yC+cf
temp[r - j + 1] = data[j + mid]; n4Fh*d ixg
} 8A/;a{
int a = temp[l]; Wyu$J
int b = temp[r]; 4Q2=\-KFj
for (i = l, j = r, k = l; k <= r; k++) { }7iWmXlI
if (a < b) { PI{;3X}9$,
data[k] = temp[i++]; ;J|sH>i
a = temp; *,$cW,LN
} else { 9(?9yFbj5
data[k] = temp[j--]; Cz=HxU80J
b = temp[j]; E$5)]<p! <
} dQ6:c7hp>D
} |J:n'}
} 4;anoqiG\
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/** /DOV/>@5%
* @param data &u5OL?>
* @param l );T0n
* @param i C^ngdba\
*/ \l^L?69
private void insertSort(int[] data, int start, int len) { :^7P. lhK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); z3!j>X_w
} UObI&*2
} `"CIy_m
} )eFXjnHN
} #clOpyT*
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堆排序： 0zrgK;9
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package org.rut.util.algorithm.support; MB]8iy8
@Qw~z0PE<l
import org.rut.util.algorithm.SortUtil; ^(<Ecdz(
e~#;ux
/** &R$6dG4
* @author treeroot 1Rlg%G'
* @since 2006-2-2 }SL&Y`Y]
* @version 1.0 rQ~7BlE
*/ 9>gxJ7pY
public class HeapSort implements SortUtil.Sort{ #CKPNk c
s Xyc _3N
/* (non-Javadoc) P%?|V_m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) [ kI|Thx
*/ sT.;*3{
public void sort(int[] data) { H4%2"w6|!
MaxHeap h=new MaxHeap(); 0V*B3V<
h.init(data); E`#m0Q(8
for(int i=0;i h.remove(); RLBeti>
System.arraycopy(h.queue,1,data,0,data.length); x*}41;j}C
} wf47Ulx
A*d Pw.
private static class MaxHeap{ }j=UO*|
&)UZ9r`z
void init(int[] data){ |C:^BWrU*
this.queue=new int[data.length+1]; uSnG=tB
for(int i=0;i queue[++size]=data; 0p6
fixUp(size); V_b"^911r
} 5`su^
} ,;3#}OGg
}yQ&[Mt
private int size=0; ~s.~X5
Yj%hgb:)
private int[] queue; DK' ? '
?:@13wm
public int get() { |wF_CZ*1
return queue[1]; q-7C7q
} P2HR4`c
CPJ8G}4
public void remove() { a7?z{ssEi
SortUtil.swap(queue,1,size--); b1rW0}A
fixDown(1); ;bz|)[4/
} "Zk# bQ2j
file://fixdown :H9\nU1
private void fixDown(int k) { f3,qDbQyJ
int j; yVF1*#"
while ((j = k << 1) <= size) { ~Mk{2;x
if (j < size %26amp;%26amp; queue[j] j++; B4tC3r
if (queue[k]>queue[j]) file://不用交换 @VdkmqXz
break; Hzm<KQ g
SortUtil.swap(queue,j,k); E?\&OeAkO
k = j; n7Em t$Hi>
} GnAG'.t-Z
} rGa@!^hk
private void fixUp(int k) { I,[njlO:
while (k > 1) { Jo%`N#jG
int j = k >> 1; g.L~Z1-
if (queue[j]>queue[k]) ^\<nOzU?
break; \X3Q,\H @
SortUtil.swap(queue,j,k); TcW-pY<N
k = j; 91I6-7# Xt
} Vq8G( <77
} U.XvS''E
YUGE>"{
} fU/&e^, 's
n $Nw/Vm
} r"E%U:y3P
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SortUtil： \<e?
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package org.rut.util.algorithm; .AB n$ml]
8'K~+L=}
import org.rut.util.algorithm.support.BubbleSort; u^6@!M
import org.rut.util.algorithm.support.HeapSort; \[\4= !v
import org.rut.util.algorithm.support.ImprovedMergeSort; E[$"~|7|$
import org.rut.util.algorithm.support.ImprovedQuickSort; @`Fv}RY{
import org.rut.util.algorithm.support.InsertSort; '=s{9lxn^
import org.rut.util.algorithm.support.MergeSort; ^)J2tpr;]=
import org.rut.util.algorithm.support.QuickSort; d_v]mfUF
import org.rut.util.algorithm.support.SelectionSort; -|z ]Ir
import org.rut.util.algorithm.support.ShellSort; KU]co4]8^s
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/** 0o2*X|i(
* @author treeroot "Wz8f
* @since 2006-2-2 fAEgrw%Ti
* @version 1.0 7Shau%2C
*/ q fc:%ks2
public class SortUtil { ye<b`bL2.
public final static int INSERT = 1; GtuA94=!V&
public final static int BUBBLE = 2; `!Z0;qk
public final static int SELECTION = 3; %rFR:w`{
public final static int SHELL = 4; x3>ZO.Q
public final static int QUICK = 5; lw\+!}8(
public final static int IMPROVED_QUICK = 6; /Dd.C<F
public final static int MERGE = 7; W8blHw"
public final static int IMPROVED_MERGE = 8; `}r)0,Z}3
public final static int HEAP = 9; xL&evG#
LiG!xs
public static void sort(int[] data) { pwF+ZNo
sort(data, IMPROVED_QUICK); ^_4e^D]P"
} XC(:O(jdA2
private static String[] name={ 64LX[8Ax#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fMpxe(
}; `p!&>,lrk
MV{\:l}y
private static Sort[] impl=new Sort[]{ [Xa,|
new InsertSort(), 5VS};&f
new BubbleSort(), Ie<H4G5Vh
new SelectionSort(), T\ *#9a
new ShellSort(), A ".v+
new QuickSort(), T}}T`Ce
new ImprovedQuickSort(), kk`K)PESi
new MergeSort(), ^l:~r2
new ImprovedMergeSort(), PFKl6_(
new HeapSort() 8AjQPDn+
}; f]pHJVgFV
AX%N:)_$|
public static String toString(int algorithm){ m&PB5s\=
return name[algorithm-1]; P,Z K
} 'fK3L<$z#m
o5@d1A
public static void sort(int[] data, int algorithm) { *5QN:
impl[algorithm-1].sort(data); f7lt|.p
} adcH3rV
A`B>fI
public static interface Sort { UF&B7r
public void sort(int[] data); 0&~JC>S
} 6%a9%Is!O
{xD\w^
public static void swap(int[] data, int i, int j) { A=Y A#0
int temp = data; ;tJ}*!z W
data = data[j]; 8|LU=p`y'
data[j] = temp; QO/nUl0E
} !.G knDT
} cMfJq}C<