[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; 29AWg(9?aS
} B0eKj=y;
int i1=l; qB44;!(
int i2=mid+1; 8:)itYE
for(int cur=l;cur<=r;cur++){ S|v")6
if(i1==mid+1) (b>B6W\&
data[cur]=temp[i2++]; x#,nR]C
else if(i2>r) Ob>M]udn
data[cur]=temp[i1++]; hTK6N
else if(temp[i1] data[cur]=temp[i1++]; M|uWSG
else 8S*W+l19f
data[cur]=temp[i2++]; %:hU:+G E
} $mq@g
} w@"l0gm+u[
eIY![..J/N
} 3lD1G~
:~{x'`czJ
改进后的归并排序: :ZP`Y%dt'
55]E<2't
package org.rut.util.algorithm.support; %_%/ym
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import org.rut.util.algorithm.SortUtil; z]O,Vqpl?
B$@fE}
/** <m!(eLm+B
* @author treeroot 47 *,
* @since 2006-2-2 [Uw/;Kyh
* @version 1.0 hj|P*yKV
*/ L>Soj|WUy(
public class ImprovedMergeSort implements SortUtil.Sort { U|}Bk/0.
JVk"M=c
private static final int THRESHOLD = 10; -cW'g
=`%"-A
/* [W{WfJ-HwG
* (non-Javadoc) !<I3^q
* S@PAtB5
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) "J(W)\
*/ UOAL7
public void sort(int[] data) { 6e.?L
int[] temp=new int[data.length]; BmGY#D,
mergeSort(data,temp,0,data.length-1); P]b *hC
} Y] "_}
=& .KKr
private void mergeSort(int[] data, int[] temp, int l, int r) { [$[1|r *Q
int i, j, k; ^jxV
int mid = (l + r) / 2; `(@}O?w!1
if (l == r) u#uT|a.
return; F1aI4H<(T
if ((mid - l) >= THRESHOLD) %qj8*1
mergeSort(data, temp, l, mid); X=U>r
else g<&n V>wF
insertSort(data, l, mid - l + 1); -p\uW0XA
if ((r - mid) > THRESHOLD) N! N>/9
mergeSort(data, temp, mid + 1, r); G(6MLh1
else )r^)e4UI
insertSort(data, mid + 1, r - mid); 4W$t28)
.uGvmD<;x
for (i = l; i <= mid; i++) { X[Q:c4'
temp = data; .*zWm
} ]-b`uYb
for (j = 1; j <= r - mid; j++) { 4Cl41a
temp[r - j + 1] = data[j + mid]; cun&'JOH?U
} 7@*l2edXm+
int a = temp[l]; C+=8?u<
int b = temp[r]; +^\TG>le
for (i = l, j = r, k = l; k <= r; k++) { xOAA1#
if (a < b) { ~$\9T.tre2
data[k] = temp[i++]; 8vL2<VT;
a = temp; /PuN+M
} else { SlRQi:
data[k] = temp[j--]; cB ,l=/?
b = temp[j]; ;@R=CQ6
} 2GRdfX
} qB0F9[U
} B<p -.tv
WzwH;!
/** 2a3RRP
* @param data WFTXSHcG
* @param l 5!pof\/a
* @param i NEb M>1>^
*/ [G/ti&Od^
private void insertSort(int[] data, int start, int len) { XzBnj7E
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ,4&?`Q
} `f~\d.*U
} QxaW x
} {hmC=j
} [_pw|BGp
MY]<^/Q
堆排序： 6?C|pO
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package org.rut.util.algorithm.support; <HC5YA)4
w#!^wN
import org.rut.util.algorithm.SortUtil; zcn/LF
1"4Pan
/** -J<{NF
* @author treeroot ev}ugRxt|k
* @since 2006-2-2 &eqeQD6
* @version 1.0 *49lM;
*/ [$<\*d/
public class HeapSort implements SortUtil.Sort{ ..5rW0lr
e2X\ll
/* (non-Javadoc) CC8)yO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g]V_)}
*/ m@Vz42g~+
public void sort(int[] data) { @*VfG CQ(
MaxHeap h=new MaxHeap(); v,VCbmc
h.init(data); $xK2M
for(int i=0;i h.remove(); 'fGB#uBt
System.arraycopy(h.queue,1,data,0,data.length); $gv3Up"U
} 7`c\~_Df_
^z%ShmM&LZ
private static class MaxHeap{ .a0]1IkatV
$k,wA8OZ-
void init(int[] data){ fUg<+|v*
this.queue=new int[data.length+1]; 5>e#SW
for(int i=0;i queue[++size]=data; DQ86(4e*g#
fixUp(size); S1Nwm?z
} 7%Q?BH7{
} ,_$}>MY;
Sz_{#-
private int size=0; Z?);^m|T
o;zU;pkB
private int[] queue; @|jLw($Ly
PXRkK63
public int get() { a At<36{?
return queue[1]; )#H&lH
} L^{1dVGWNa
YXi'^GU@
public void remove() { UBm L:Qv
SortUtil.swap(queue,1,size--); +'ZJ]
fixDown(1); >OLKaghV.5
} ,DZoE~
file://fixdown OABMIgX
private void fixDown(int k) { j+9;Cp]NV
int j; Vx<`6uv
while ((j = k << 1) <= size) { XB.xIApmy
if (j < size %26amp;%26amp; queue[j] j++; Nf!g1D"U
if (queue[k]>queue[j]) file://不用交换 <Pm!#)-g9
break; b:M1P&R
SortUtil.swap(queue,j,k); 5p}ri,Y<
k = j; 0{q>'dv
} ,dR<O.{0
} l@irAtg4
private void fixUp(int k) { I0qSx{K
while (k > 1) { 0'QX*xfa>
int j = k >> 1; d5z=fH9
if (queue[j]>queue[k]) 2&,jO+BqE@
break; tpY]Mz[J
SortUtil.swap(queue,j,k); v><c@a=[
k = j; A5\00O~
} X9-WU\?UC
} nqFJNK]a
){I0
} 7'~Oai~r
;J>upI
} -91*VBrOd
yd|roG/
SortUtil： Km)VOX[ZZ
L* 0$x
package org.rut.util.algorithm; a7fFp9l!
@,:6wKMc
import org.rut.util.algorithm.support.BubbleSort; LJc"T)>$`
import org.rut.util.algorithm.support.HeapSort; rsaN<6#_^Q
import org.rut.util.algorithm.support.ImprovedMergeSort; sy]hMGH:3W
import org.rut.util.algorithm.support.ImprovedQuickSort; x_+-TC4IXn
import org.rut.util.algorithm.support.InsertSort; k',#T932x1
import org.rut.util.algorithm.support.MergeSort; %4QpDt
import org.rut.util.algorithm.support.QuickSort; li37*
import org.rut.util.algorithm.support.SelectionSort; [pRRBMho
import org.rut.util.algorithm.support.ShellSort; 1`Ig A0V`"
iCtDV5
/** 0R-J \
* @author treeroot kdP*{
* @since 2006-2-2 $A;%p6PO)
* @version 1.0 !0Mx Bem
*/ cSD$I^$oq
public class SortUtil { EEn8]qJC
public final static int INSERT = 1; @"G+kLv0
public final static int BUBBLE = 2; dHsI<:T#
public final static int SELECTION = 3; nf0]<x2
public final static int SHELL = 4; E~y(@72)
public final static int QUICK = 5; Vm*E^ v
public final static int IMPROVED_QUICK = 6; >lV'}0u)
public final static int MERGE = 7; Nrn_Gy>|D
public final static int IMPROVED_MERGE = 8; ;Zy[2M
public final static int HEAP = 9; q21l{R{Y
QMhvyzkS
public static void sort(int[] data) { }WV}in0
sort(data, IMPROVED_QUICK); t+ vz=`
} A`:a T{j
private static String[] name={ W5Uw=!LdEY
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =o5|W'>`
}; `PUGg[Zx^
Ntt*}|:QV<
private static Sort[] impl=new Sort[]{ w$DHMpW'
new InsertSort(), t}YT+S
new BubbleSort(), &e6!/y&
new SelectionSort(), ^?8/9o
new ShellSort(), ;EB^1*AEw
new QuickSort(), zMXQfR
new ImprovedQuickSort(), b]b+PK*h
new MergeSort(), sR4B/1'E
new ImprovedMergeSort(), h5Ee*De
new HeapSort() >i_ #q$o
}; x^79s_h5
7tP%tp ez
public static String toString(int algorithm){ lv>^P>S(O
return name[algorithm-1]; bn%4s[CVb4
} +P=IkbxAO
.|e8v _2J
public static void sort(int[] data, int algorithm) { kW7$Gw]-
impl[algorithm-1].sort(data); ]5r@`%9
} !T#EkMM
1{AK=H')
public static interface Sort { jx{wOb~oO)
public void sort(int[] data); z*UgRLKZD
} )*XD"-9
v&qL r+_7
public static void swap(int[] data, int i, int j) { 2e9.U/9
int temp = data; ifcp!l+8
data = data[j]; GO)5R,
data[j] = temp; $Jo4n>/
} ph$vP;}
} bO` SBq$