[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; =&+]>g{T
} 337y,;
int i1=l; &L7u//
int i2=mid+1; C]S~DK1
for(int cur=l;cur<=r;cur++){ Br/qOO:n$}
if(i1==mid+1) 6oTWW@
data[cur]=temp[i2++]; {g8uMt\4
else if(i2>r) *R9s0;&:
data[cur]=temp[i1++]; G!]%xFwYa
else if(temp[i1] data[cur]=temp[i1++]; L8OW@)|
else 6Gt~tlt:L
data[cur]=temp[i2++]; % mP%W<
} '{]1!yMh
} E/bIq}R6
vW6 a=j8
} 5cc;8i
lMkDLobos
改进后的归并排序: .CJQ]ECl7p
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package org.rut.util.algorithm.support; BR&T,x/d
]5(T{
import org.rut.util.algorithm.SortUtil; _#[~?g`
SCwAAE9s]
/** pe^hOzVv
* @author treeroot (EW<Ggi
* @since 2006-2-2 )m8ve)l
* @version 1.0 [3$L}m
*/ HCBZ*Z-
public class ImprovedMergeSort implements SortUtil.Sort { R-7.q
$db]b
private static final int THRESHOLD = 10; 1XfH,6\8i
{u!Q=D$3
/* L'i0|_
* (non-Javadoc) V+\L@mz;
* nP]tc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) F; upb5
*/ zzlqj){F
public void sort(int[] data) { jbQ N<`!
int[] temp=new int[data.length]; XKp$v']u
mergeSort(data,temp,0,data.length-1); E`E$ }iLs
} +IS+!K0?)
P9d%80(b4
private void mergeSort(int[] data, int[] temp, int l, int r) { ~bm VpoI
int i, j, k; jM<=>P
int mid = (l + r) / 2; /"~ D(bw0=
if (l == r) ZtzSG@f
return; QuF76&)7
if ((mid - l) >= THRESHOLD) Xk2M.:3`
mergeSort(data, temp, l, mid); {?2jvv
else N=2BrKb)o
insertSort(data, l, mid - l + 1); w$5~'Cbi
if ((r - mid) > THRESHOLD) a#i85su
mergeSort(data, temp, mid + 1, r); 0QzUcr)3+
else >Xz=E0;^Ua
insertSort(data, mid + 1, r - mid); ? PIq/[tk
hMcSB8?
for (i = l; i <= mid; i++) { g(X-]/C{
temp = data; 0wFa7PyG?
} L&D+0p^lI
for (j = 1; j <= r - mid; j++) { P<. TiF?@
temp[r - j + 1] = data[j + mid]; \VL_
} `/|S.a#g
int a = temp[l]; eA4dDKX+
int b = temp[r]; JA=9EnTU
for (i = l, j = r, k = l; k <= r; k++) { C-wwQbdG/
if (a < b) { m7~<z>5$
data[k] = temp[i++]; ]YQ!i@Y
a = temp; f+}Rj0A
} else { ;HKb
data[k] = temp[j--]; 4blw9x N
b = temp[j]; It5U=PU
} M lv
} iTX:*$~I
} 1\'?.
R1!F mZW8
/** C]X:@^Hy
* @param data "7w~0?}
* @param l .,-,@ZK
* @param i .2K4<UOAbm
*/ a'NxsByG]s
private void insertSort(int[] data, int start, int len) { \IL;}D{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fPW|)e"
} ujlIWQU2mo
} '7'*+sgi$
} Mx-? &
} ,H_b@$]n8
7m4gGkX#r
堆排序： 4yZ'+\ +I
s!lLdR[g
package org.rut.util.algorithm.support; %NyV2W=~X
&1=Je$,
import org.rut.util.algorithm.SortUtil; rLkUIG
9EPE.+ns
/** v jTs[eq>
* @author treeroot YsX&]4vzm
* @since 2006-2-2 2yB@)?V/
* @version 1.0 5hhiP2q
*/ /*V:Lh
public class HeapSort implements SortUtil.Sort{ 2s^9q9NS"
o{W4@:Ib
/* (non-Javadoc) R*"31&3le4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Qkk3>{I
*/ +*W9*gl
public void sort(int[] data) { 3 s@6pI
MaxHeap h=new MaxHeap(); ^)JUl!5j]C
h.init(data); @ij8AGE:
for(int i=0;i h.remove(); oVD)Fb%[i9
System.arraycopy(h.queue,1,data,0,data.length); sIVVF#0}]
} z~O#0Q!
v?s]up @@h
private static class MaxHeap{ >A]U.C
A?YU:f
void init(int[] data){ 3`Ug]<m
this.queue=new int[data.length+1]; xSf&*wLE
for(int i=0;i queue[++size]=data; KA[8NPhzZ
fixUp(size); I.4o9Z[?
} 8!R +wy
} sp&s 5aw
A`5/u"]*D
private int size=0; WfdM~k\
?{)sdJe
private int[] queue; /Zzb7bHLK
ZqDanDM
public int get() { vb&1 S
return queue[1]; =XRTeIZ
} &Zzd6[G+
o@6hlLr
public void remove() { N7wKaezE
SortUtil.swap(queue,1,size--); dy}O6
fixDown(1); QbN7sg~~
} slQxz;t
file://fixdown cC4 2b2+
private void fixDown(int k) { GlVb|O"
int j; \!*3bR
while ((j = k << 1) <= size) { n?UFFi+a
if (j < size %26amp;%26amp; queue[j] j++; Gp l
if (queue[k]>queue[j]) file://不用交换 OI8Hf3d=
break; =do*(
SortUtil.swap(queue,j,k); 7Gos-_s
k = j; I^u$H&
} !,SGKLs.m
} Q;V*M
private void fixUp(int k) { p{V_}:|=Q
while (k > 1) { L~Hl?bK
int j = k >> 1; `wMHjcUP
if (queue[j]>queue[k]) x)]_]_vX
break; ytmFe!
SortUtil.swap(queue,j,k); !1X^lFf;~
k = j; z PW[GkD
} 7_=7 ;PQ<
} nfldj33*
q2$-U&
} ]_hrYjX;
>*wF~G*k
} 1"hd5a
k2-:!IE
SortUtil： FFG/v`NM
L[j73z'
package org.rut.util.algorithm; Vgj&hdbd
A>bpP
import org.rut.util.algorithm.support.BubbleSort; ycD}7
import org.rut.util.algorithm.support.HeapSort; 51)Q&,Mo#
import org.rut.util.algorithm.support.ImprovedMergeSort; "mk4O4dF
import org.rut.util.algorithm.support.ImprovedQuickSort; tM% f#O
import org.rut.util.algorithm.support.InsertSort; u@@0YUa
import org.rut.util.algorithm.support.MergeSort; 7CGxM
import org.rut.util.algorithm.support.QuickSort; G1!yPQa7d
import org.rut.util.algorithm.support.SelectionSort; 34Fc oud);
import org.rut.util.algorithm.support.ShellSort; Bd8{25{c
dF`\ewRFn
/** |riP*b
* @author treeroot fr19C%{
* @since 2006-2-2 +=N!37+G
* @version 1.0 @)IHd6 R
*/ qH8d3?1XO
public class SortUtil { TwaK>t96[
public final static int INSERT = 1; -|FSdzvg
public final static int BUBBLE = 2; @[2Go}VF
public final static int SELECTION = 3; b3vPGR
public final static int SHELL = 4; fOHgz,x=
public final static int QUICK = 5; `pTCK9
public final static int IMPROVED_QUICK = 6; gZg5On
public final static int MERGE = 7; iC.k8r+~
public final static int IMPROVED_MERGE = 8; MjNq8'$"
public final static int HEAP = 9; d%EUr9~?
{,9^k'9
public static void sort(int[] data) { $vR#<a,7>
sort(data, IMPROVED_QUICK); y-1!@|l0:6
} J^Mq4&
private static String[] name={ v90)G8|q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" C&1()U
}; }JWLm.e
k0/S&e,*
private static Sort[] impl=new Sort[]{ $Ith8p~
new InsertSort(), k%gO
new BubbleSort(), O/N@Gz[g%
new SelectionSort(), V~~4<?=A
new ShellSort(), >Av[`1a2F
new QuickSort(), p-S&Wq
new ImprovedQuickSort(), Ed>Dhy6\r
new MergeSort(), O^L#(8bC
new ImprovedMergeSort(), ;Pd nE~
new HeapSort() )o;oOPT!
}; Rt6(y #dF
C-:lM1
public static String toString(int algorithm){ l`wF;W!
return name[algorithm-1]; gx55.}
} c?/R=/H
je[1>\3W
public static void sort(int[] data, int algorithm) { qx;8Hq(E[
impl[algorithm-1].sort(data); Nj^:8]D)0
} }iE!( l
*i)3q+%.
public static interface Sort { YR? ujN
public void sort(int[] data); 6]D%|R,Q#}
} s{:l yp
p7{%0
public static void swap(int[] data, int i, int j) { xk/osbKn
int temp = data; VHbQLJ0
data = data[j]; $[*QsU%%
data[j] = temp; v|K'M,E
} =U- w!uW
} Xk]:]pl4W