[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; RHpjJZUV
} $uJc/
int i1=l; $duT'G, -
int i2=mid+1; .Pte}pM"v
for(int cur=l;cur<=r;cur++){ g oyQ',+
if(i1==mid+1) S("dU`T?
data[cur]=temp[i2++]; <%`Rku
else if(i2>r) ](8F]J ,
data[cur]=temp[i1++]; 1|!)*!hu
else if(temp[i1] data[cur]=temp[i1++]; %l#X6jkt
else T9!NuKfur
data[cur]=temp[i2++]; 2"6qg>]-t
} ^W9O_5\g4a
} %;R&cSZ
V82I%gPF
} >;bym)
=$L+J O
改进后的归并排序: $$W2{vr7+
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package org.rut.util.algorithm.support; fH?A.JP=a
HB$?}V
import org.rut.util.algorithm.SortUtil; -:"KFc8A
EY3F9h3xM|
/** osdoL
* @author treeroot CY{!BV'
* @since 2006-2-2 Q-F$Ryj^
* @version 1.0 *h=>*t?I2
*/ QtXiUx^ k<
public class ImprovedMergeSort implements SortUtil.Sort { vD:J!|hs(
:ir3u
private static final int THRESHOLD = 10; nf<I
)8eb(!}7
/* q#Q%p+
* (non-Javadoc) K/*"U*9Kv
* ]4V1]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,bIJW]h0
*/ 3A[<LnKR^E
public void sort(int[] data) { ' Q(kx*;
int[] temp=new int[data.length]; surNJ,)
mergeSort(data,temp,0,data.length-1); bu<d>XR
} oWLP|c~Ap
n-],!pL^
private void mergeSort(int[] data, int[] temp, int l, int r) { {^(uoB C/
int i, j, k; TF5jTpGq
int mid = (l + r) / 2; o|y_j49
if (l == r) H_t0$x(\
return; C& XPn;f
if ((mid - l) >= THRESHOLD) _j3rs97@|
mergeSort(data, temp, l, mid); #Ha"rr46p
else Z!^>!'Z
insertSort(data, l, mid - l + 1); s^IC]sW\%
if ((r - mid) > THRESHOLD) r\F2X J^
mergeSort(data, temp, mid + 1, r); $F9w0kz:,*
else i=]R1yP
insertSort(data, mid + 1, r - mid); .-mIU.Nwi
DO~[VK%|
for (i = l; i <= mid; i++) { )?{!7/H F@
temp = data; WQze|b%
} Y<(7u`F
for (j = 1; j <= r - mid; j++) { }7b{ZbDI
temp[r - j + 1] = data[j + mid]; C4`&_yoP4-
} ai1;v@1
int a = temp[l]; TQNdBq5I6
int b = temp[r]; D.%%D%AdB
for (i = l, j = r, k = l; k <= r; k++) { &!O?h/&X3
if (a < b) { 0*tnJB
data[k] = temp[i++]; MN5}}@
a = temp; k\;D;e{
} else { wbcip8<t
data[k] = temp[j--]; n'{jc6&|
b = temp[j]; Mp!1xx
} aXQAm$/ >
} '0)`.
} 3)LS#=
2RF3pIFrm
/** [g<gu~
* @param data ;<''oY
* @param l rP2h9Cb
* @param i Y3FFi M[s~
*/ T}1"
private void insertSort(int[] data, int start, int len) { 3`vKEThY)
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); K@%T5M4j
} km5gO|V>m
} SqRM*Cf=
} 2-N7%]h
} mwsBj)
"=C~IW
堆排序： :AFU5mR4&
KnA BFH
package org.rut.util.algorithm.support; @NL<v-t
2)\MxvfOh
import org.rut.util.algorithm.SortUtil; { pQJ.QI
.|g@#XIwe#
/** Mt`LOdiC_
* @author treeroot eN </H.bm]
* @since 2006-2-2 d}Guj/cx,
* @version 1.0 -AD`(b7q
*/ '%ZKvZ-
public class HeapSort implements SortUtil.Sort{ _Li.}g@Bd
He4HIZ
/* (non-Javadoc) KehM.c^
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) zDtC]y'
*/ >R6mI
public void sort(int[] data) { zA+0jhuG
MaxHeap h=new MaxHeap(); O;V^Fk(
h.init(data); ~xc/Dsb$
for(int i=0;i h.remove(); &[j9Up'
System.arraycopy(h.queue,1,data,0,data.length); ')yYpWO
} Vj1V;dHv
V_m!<sr(
private static class MaxHeap{ 60nP'xfR
Opg_-Bf
void init(int[] data){ iHc(e(CB<
this.queue=new int[data.length+1]; x\~ <8o
for(int i=0;i queue[++size]=data; QJVB:>A
fixUp(size); .=<s@Sg,t
} p^q/u
} }Rh%bf7,
'U ZzH$h
private int size=0; vL[IVBG^
XRQ1Uh6
private int[] queue; [_3&
Zos.WS#
public int get() { 0QPY+6
return queue[1]; `+vQ5l$;L
} DCLu^:|C"
RFFbS{U*
public void remove() { 5[B)U">]
SortUtil.swap(queue,1,size--); b&4JHyleF
fixDown(1); OvwoU=u
} "K9[P:nw
file://fixdown Wf5;~RJC?
private void fixDown(int k) { 8mRZ(B>% X
int j; oHv.EO
while ((j = k << 1) <= size) { >?ar
if (j < size %26amp;%26amp; queue[j] j++; q"T?
if (queue[k]>queue[j]) file://不用交换 )F&.0 '
break; |@1(^GX
SortUtil.swap(queue,j,k); 0g=vMLi
k = j; 2_3os P\Z
} v5pkP
} c/^:vTF
private void fixUp(int k) { F;_o`h
while (k > 1) { |Rx+2`6Dp
int j = k >> 1; g{sp<w0
if (queue[j]>queue[k]) 4Hb"yp$
break; {` bX*]
SortUtil.swap(queue,j,k); >7cj.%
k = j; `W_&^>yl
} 9ei'oZ
} \h s7>5O^K
\}kR'l
} gpzFY"MS=
.mqMzV
} jr.{M
d_&pxy? >
SortUtil： o+{i26%
'~f*O0_
package org.rut.util.algorithm; zd- *UFi
qBK68B)
import org.rut.util.algorithm.support.BubbleSort; 2G5|J{4w
import org.rut.util.algorithm.support.HeapSort; =N\$$3m?
import org.rut.util.algorithm.support.ImprovedMergeSort; HN/YuP03[
import org.rut.util.algorithm.support.ImprovedQuickSort; NYg&8s.
import org.rut.util.algorithm.support.InsertSort; h:C:opa-=
import org.rut.util.algorithm.support.MergeSort; |x&4vHXR0
import org.rut.util.algorithm.support.QuickSort; MNTVG&h
import org.rut.util.algorithm.support.SelectionSort; _7;G$\^&.
import org.rut.util.algorithm.support.ShellSort; LX&O"YY
Ez-AQ'
/** /u90)x
* @author treeroot ?z-nY,'^uq
* @since 2006-2-2 L[Y$ `e{zd
* @version 1.0 zPHx\z"
*/ i,Z-UA|f=T
public class SortUtil { .=G3wox3
public final static int INSERT = 1; s[UV(::E
public final static int BUBBLE = 2; hR2 R
public final static int SELECTION = 3; cw)J+Lyh
public final static int SHELL = 4; FqnD"]A
public final static int QUICK = 5; + `'wY?
public final static int IMPROVED_QUICK = 6; CK4#ZOiaa
public final static int MERGE = 7; jgXr2JQ<
public final static int IMPROVED_MERGE = 8; mRyf+O[
public final static int HEAP = 9; y0O e)oP
%yKcp5_
public static void sort(int[] data) { AA ~7"2e
sort(data, IMPROVED_QUICK); D,FgX/&i/
} &6Lh>n(
private static String[] name={ jw\4`NZ]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ouoIbA9X
}; pjV70D8$A
A~k: m0MX
private static Sort[] impl=new Sort[]{ g26_#4 P
new InsertSort(), H|j]uLZ
new BubbleSort(), '|v<^EH
new SelectionSort(), zT/woiyB`
new ShellSort(), =c#mR" 1
new QuickSort(), |t3}>+"?z
new ImprovedQuickSort(), g}hNsU=$5~
new MergeSort(), +gBDE:
new ImprovedMergeSort(), mKV31wvK}
new HeapSort() pK_zq
}; rij%l+%@#
~mah.8G
public static String toString(int algorithm){ 'aD"v>
return name[algorithm-1]; <j#IR
} CV{ZoY
:U'n0\
public static void sort(int[] data, int algorithm) { VB8eGMo
impl[algorithm-1].sort(data); uP8 cW([
} SLNOOEN
P$AHw;n[R
public static interface Sort { }waZGJLN
public void sort(int[] data); <.BY=z=H
} `2V{]F
8<Yv:8%B6
public static void swap(int[] data, int i, int j) { > 9z-/e
int temp = data; >nK(
data = data[j]; RASk=B
data[j] = temp; MOB'rPIUI
} "? V;C
} 4-'0# a