[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; zhsx&
} `deYi2z
int i1=l; |f' 8p8J
int i2=mid+1; sdr.u
for(int cur=l;cur<=r;cur++){ #Z9L_gDp
if(i1==mid+1) Ap<J'?~y
data[cur]=temp[i2++]; HeIS;gfUY
else if(i2>r) []}N
data[cur]=temp[i1++]; A,XfD}+:Z
else if(temp[i1] data[cur]=temp[i1++]; 2p< Aj!
else ?2`$3[ET-
data[cur]=temp[i2++]; aiux^V
} 8z T0_vw
} &3DK^|Lq
km 5E)_]
} Ci\? ^
77aX-e*=E
改进后的归并排序: +{-]P\oc
>FFVY{F
package org.rut.util.algorithm.support; %$9bce-fcG
<DmTj$
import org.rut.util.algorithm.SortUtil; J r*"V`
A7Y_HIo
/** -!dQ)UEP
* @author treeroot (F&YdWe:
* @since 2006-2-2 8pe0$r`b
* @version 1.0 !Q)3-u
*/ a$}6:E
public class ImprovedMergeSort implements SortUtil.Sort { |uUuFm
9k>uRV6
private static final int THRESHOLD = 10; )I9aC~eAD
{;n0/
/* DY3:#X`4
* (non-Javadoc) n|KKby.$
* a%J/0'(d
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ?qT(3C9p
*/ !J^tg2M8:
public void sort(int[] data) { I'InZ0J2
int[] temp=new int[data.length]; e'~ Q@_D
mergeSort(data,temp,0,data.length-1); =K'L|QKF
} s[V`e2O
L@A9{,9Pl
private void mergeSort(int[] data, int[] temp, int l, int r) { hqW$kw
int i, j, k; 'NjSu64W
int mid = (l + r) / 2; rPTfpeqN)
if (l == r) Xj,j0
return; e_.~n<=
if ((mid - l) >= THRESHOLD) (02g#A`
mergeSort(data, temp, l, mid); F#1kZ@nq
else yN:>!SQ
insertSort(data, l, mid - l + 1); </ZHa:=7
if ((r - mid) > THRESHOLD) 9dYOH)f
mergeSort(data, temp, mid + 1, r); 3B#!2|
else Au=kSSB
insertSort(data, mid + 1, r - mid); aBlbg3q
d*9j77C]
for (i = l; i <= mid; i++) { [V5-%w^
temp = data; CWMlZVG
} ~@fanR =
for (j = 1; j <= r - mid; j++) { OqEHM%j
temp[r - j + 1] = data[j + mid]; RKk"
} 0O; Z
int a = temp[l]; N|N/)
int b = temp[r]; .v l="<
for (i = l, j = r, k = l; k <= r; k++) { p JX, n
if (a < b) { v=MzI#0L
data[k] = temp[i++]; \e0x,2
a = temp; _IKQ36=
} else { ca}S{"
data[k] = temp[j--]; C->[$HcRa
b = temp[j]; uXNp!tY
} 4K #^dJnC
} .~,^u
} V=9Bto00
+/_!P;I
/** 4Q&mC"
* @param data opnkmM&[
* @param l MM*-i=
* @param i ,O9`X6rh'
*/ 05g?jV
private void insertSort(int[] data, int start, int len) { u[J7Y
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Esa6hU#
} Tvrc%L(]
} P.1Qc)m4
} d!!3"{'
} +1f{_v
2dyxKK!\a
堆排序： _<Vg[-:1
b)y<.pS\
package org.rut.util.algorithm.support; {4)5]62>u
:z124Zf
import org.rut.util.algorithm.SortUtil; |vT=Nnu
vT}pbOTh
/** NIL^UN}
* @author treeroot qIk )'!Vk
* @since 2006-2-2 ]o!&2:'N`
* @version 1.0 'F6#l"~/
*/ v6(,Ax&
public class HeapSort implements SortUtil.Sort{ ^EUQ449<p
^CX,nj_(
/* (non-Javadoc) EKJH_!%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) IjgBa-o/V
*/ MIJ%_=sm4:
public void sort(int[] data) { 8ZzU^x
MaxHeap h=new MaxHeap(); A7e_w 7?a
h.init(data); Qvs(Rt3?y
for(int i=0;i h.remove(); WT1q15U(=
System.arraycopy(h.queue,1,data,0,data.length); *IVD/9/
} s'2y%E#
&U854
private static class MaxHeap{ ur`}v|ZY
"SDsISWd
void init(int[] data){ AF QnCl Of
this.queue=new int[data.length+1]; Q!Msy<v
for(int i=0;i queue[++size]=data; >sB=\
fixUp(size); LsUFz_
} [)bz6\d[
} oRV]p
l.yJA>\24I
private int size=0; Hv+:fr"
Q0_M-^~WT
private int[] queue; !zF4 G,W
UU-v;_oP
public int get() { }$w4SpR
return queue[1]; ( / G)"]
} ~F=#}6kg_
sCL/pb]
public void remove() { ByC1I.B`
SortUtil.swap(queue,1,size--); aB7d(
fixDown(1); OcLg3.:L
} }NR`81
file://fixdown ~rQ4n9G
private void fixDown(int k) { +q4W0
int j; U_.n=d~B
while ((j = k << 1) <= size) { k_-vT
if (j < size %26amp;%26amp; queue[j] j++; /{49I,
if (queue[k]>queue[j]) file://不用交换 e=YO.HT
break; gE-lM/w
SortUtil.swap(queue,j,k); {Nzmb|&
k = j; DKf}47y
} z[_R"+
} 5mDVFb 3a
private void fixUp(int k) { ;e`D#khB
while (k > 1) { VuP#b'g=|]
int j = k >> 1; HFpjNR
if (queue[j]>queue[k]) k QB 1=c
break; *_}IeNc
SortUtil.swap(queue,j,k); &8IWDx.7}
k = j; mNGb} lR
} -zkW\O[
} 4UkP:Vz:
?Aj\1y4L1
} ]JGKL5~p
E5v|SFD
} j&o/X7I=
l;"ub^AH
SortUtil： pIM*c6
6C@0[Q\ER
package org.rut.util.algorithm; 8HHgN`_
}7f 1(#{7
import org.rut.util.algorithm.support.BubbleSort; S"I#>^
import org.rut.util.algorithm.support.HeapSort; )1X' W
import org.rut.util.algorithm.support.ImprovedMergeSort; xP<H,og&x=
import org.rut.util.algorithm.support.ImprovedQuickSort; KE&InTM/j
import org.rut.util.algorithm.support.InsertSort; gs^UR6 D,
import org.rut.util.algorithm.support.MergeSort; Cnb[t[hk+j
import org.rut.util.algorithm.support.QuickSort; p P_wBX
import org.rut.util.algorithm.support.SelectionSort; tF{{cd
import org.rut.util.algorithm.support.ShellSort; sPZV>Q:zY
IIYX|;1}X
/** Q#d+IIR0gK
* @author treeroot x`/m>~_
* @since 2006-2-2 a3DoLq"/
* @version 1.0 W]C_oh
*/ GN}9$:
public class SortUtil { 6x`\ J2x
public final static int INSERT = 1; W0p#Y h:{_
public final static int BUBBLE = 2; s/k
public final static int SELECTION = 3; eB}sg4
public final static int SHELL = 4; m bB\~n
public final static int QUICK = 5; l7=$4As/hI
public final static int IMPROVED_QUICK = 6; oj,Vi-TZ
public final static int MERGE = 7; -wG[>Y
public final static int IMPROVED_MERGE = 8; \&l*e
public final static int HEAP = 9; 4#'^\5
; HR\R
public static void sort(int[] data) { A[wxa
sort(data, IMPROVED_QUICK); noB}p4
} K!$\REs
private static String[] name={ reD[j,i&t.
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &?uzJx~
}; s\n,Z?m
oeRYyJ
private static Sort[] impl=new Sort[]{ b ?=
new InsertSort(), gFH;bZU
new BubbleSort(), 4)c"@Zf
new SelectionSort(), 0t/z"
new ShellSort(), #o}{cXX#
new QuickSort(), XO8 H]
new ImprovedQuickSort(), "pKGUM
new MergeSort(), 1^Y:XJ73
new ImprovedMergeSort(), ,vHX>)M|
new HeapSort() yA`]%U((
}; [1[[$ Dr
<_FF~lj
public static String toString(int algorithm){ ;Wp`th!F
return name[algorithm-1]; 5p(t")
} P(W\aLp
BLYk <m
public static void sort(int[] data, int algorithm) { S^sW.(I
impl[algorithm-1].sort(data); (p#;6Xhf
} 7\|NYT4
Vq;{+j(
public static interface Sort { IhFw{=2*
public void sort(int[] data); NnSI)*%'
} "S:NU.c?
LTlC}3c28f
public static void swap(int[] data, int i, int j) { RQ$o'U9A
int temp = data; -`ys pE0?
data = data[j]; 1 _:1/~R1
data[j] = temp; rym\5 `)
} L_CEY
} 3YZ3fhpw