[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; iS-K ~qa
} <7RfBR.9
int i1=l; NbDda/7ki
int i2=mid+1; hAAUecx
for(int cur=l;cur<=r;cur++){ ZKQo#!}
if(i1==mid+1) %EIUAG
data[cur]=temp[i2++]; .zwVCW,u
else if(i2>r) 2IzfP;V?
data[cur]=temp[i1++]; MBO,\t.
else if(temp[i1] data[cur]=temp[i1++]; BhkAQEsWTQ
else }200g_^
data[cur]=temp[i2++]; )0F^NU
} _LsYMUe
} 6o(lObfo
.+uVgSN
} *-7fa0<
.b~OMTHuvM
改进后的归并排序: l#ygb|=x
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package org.rut.util.algorithm.support; TO8\4p*tE
Wl^/=I4p#
import org.rut.util.algorithm.SortUtil; )@};lmPR
c9F[pfi(
/** vFkyfX(
* @author treeroot a|^-z|.
* @since 2006-2-2 E,nYtn|B
* @version 1.0 ^~hhdwu3a
*/ _a:!U^4
public class ImprovedMergeSort implements SortUtil.Sort { 7~k~S>sO
pu m9x)y1
private static final int THRESHOLD = 10; }G0.Lq+a
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/* jTxChR
* (non-Javadoc) A/W7;D
* {e!uvz,e
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ^Xz`hR
*/ uh5Pn#da^
public void sort(int[] data) { Ev+HWx~Y
int[] temp=new int[data.length]; `*" H/QG
mergeSort(data,temp,0,data.length-1); bCA2ik
} >d{dZD}
M[YTk=IM#
private void mergeSort(int[] data, int[] temp, int l, int r) { 't|Un G
int i, j, k; &c!j`86y*
int mid = (l + r) / 2; (odR'#
if (l == r) 'dIX=/RZ
return; n+{HNr
if ((mid - l) >= THRESHOLD) L$+d.=]
mergeSort(data, temp, l, mid); m]FaEQVoE
else ""1#bs{n
insertSort(data, l, mid - l + 1); W.,% 0cZ
if ((r - mid) > THRESHOLD) bA@ /B'
mergeSort(data, temp, mid + 1, r); w]>"'o{{
else M}Nb|V09
insertSort(data, mid + 1, r - mid); 4F05(R8k
#XTY7,@P
for (i = l; i <= mid; i++) { .i{>Z
temp = data; FI]P<)*r
} $; Q$W9+
for (j = 1; j <= r - mid; j++) { 8tb6 gZz
temp[r - j + 1] = data[j + mid]; <^lJr82
} TZ?Os4+
int a = temp[l]; @S`$C
int b = temp[r]; +>JdYV<?0
for (i = l, j = r, k = l; k <= r; k++) { &qJPwO
if (a < b) { weNzYMf%
data[k] = temp[i++]; 5]jx5!N
a = temp; 8YNu<
} else { KK?Zm_
data[k] = temp[j--]; 7#QLtU
b = temp[j]; A0G)imsW:_
} U?gl"6x
} 7FAIew\r
} L2KG0i`+
"r u]?{v
/** o4$Ott%Wm
* @param data U1OFDXHG
* @param l l^.K'Q1~a
* @param i <lUOJV{&\
*/ g %f*ofb
private void insertSort(int[] data, int start, int len) { dXmV@ Noo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); pD"YNlB^
} ?a S%
} :z]}ZZ
} !<&m]K
} ^$!987"
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堆排序： _5mc('
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package org.rut.util.algorithm.support; F!JJ6d53y
3{KR {B#L
import org.rut.util.algorithm.SortUtil; qz9tr
syv$XeG=}
/** f|U0s
* @author treeroot |g%mP1O
* @since 2006-2-2 petW M@
* @version 1.0 hrbo:8SL
*/ 2jl)mL
public class HeapSort implements SortUtil.Sort{ D==Mb~
yPV'pT)
/* (non-Javadoc) c"7j3/p
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) M`vyTuO3SO
*/ %r;w;`/hA
public void sort(int[] data) { ;#TaZN
MaxHeap h=new MaxHeap(); [|[>}z:
h.init(data); f6!D L<
for(int i=0;i h.remove(); 4,G w#@
System.arraycopy(h.queue,1,data,0,data.length); mf' ]O,
} S_v(S^x6
fTqC:r|st
private static class MaxHeap{ HSN8O@dy
09S6#;N&
void init(int[] data){ w\w(U
this.queue=new int[data.length+1]; .R5y:O
for(int i=0;i queue[++size]=data; /qU>5;
fixUp(size); MgJ36zM
} y#v"GblM
} |>2FRPK
|.P/:e9
private int size=0; LZ U$
V-!"%fO.s
private int[] queue; ,e`'4H
eKN$jlg
public int get() { U47}QDh
return queue[1]; ]XA4;7
} ceT&Y{T
M+`Hg_#Q
public void remove() { (*\jbK
SortUtil.swap(queue,1,size--); ] asBd"
fixDown(1); &|Pu-A"5~
} B*1W`f
file://fixdown 6rN(_Oi-
private void fixDown(int k) { !@A#=(4R4
int j; *[+)7
while ((j = k << 1) <= size) { /mM2M-
if (j < size %26amp;%26amp; queue[j] j++; (08I
if (queue[k]>queue[j]) file://不用交换 3WY$WRv
break; 17.x0gW,
SortUtil.swap(queue,j,k); \5)htL1F
k = j; C'A]i5
} Q@@v1G\
} S8,Z;y
private void fixUp(int k) { DI|:p!Nx
while (k > 1) { m~hoE8C$
int j = k >> 1; [&?8,Q(
if (queue[j]>queue[k]) mTNVU@TY=
break; cbYLU\!
SortUtil.swap(queue,j,k); \C^;k%{LV
k = j; A"5z6A4WB
} '3IC*o"
} 3jH\yXj
>wHxmq8F5<
} Ez~'^s@
//xxSk
} n"*A.
t ?rUbN
SortUtil： (k4>I"x)
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package org.rut.util.algorithm; EHmw(%a|+
ar }F^8Ku
import org.rut.util.algorithm.support.BubbleSort; pxjb^GZ0
import org.rut.util.algorithm.support.HeapSort; N"Q-xK
import org.rut.util.algorithm.support.ImprovedMergeSort; u.43b8!
import org.rut.util.algorithm.support.ImprovedQuickSort; 7vZznN8e
import org.rut.util.algorithm.support.InsertSort; <7-3j{065
import org.rut.util.algorithm.support.MergeSort; q&#f#Ou
import org.rut.util.algorithm.support.QuickSort; w,n&K6<
import org.rut.util.algorithm.support.SelectionSort; v,^2'C$o
import org.rut.util.algorithm.support.ShellSort; iLD}>=
K_;'-B
/** F$X"?fj
* @author treeroot J4EQhuQ
* @since 2006-2-2 ^z>3+oi
* @version 1.0 6B'd]Fe
*/ $DBJ"8n2
public class SortUtil { 06X4mu{
public final static int INSERT = 1; 8iQ8s;@S&>
public final static int BUBBLE = 2; /x\{cHAt8J
public final static int SELECTION = 3; z$C}V/Ey
public final static int SHELL = 4; h)7hk*I
public final static int QUICK = 5; O1[`2kj^HB
public final static int IMPROVED_QUICK = 6; }&!fT\4
public final static int MERGE = 7; SA!P:Q?h
public final static int IMPROVED_MERGE = 8; u4hC/!
public final static int HEAP = 9; e*K1";
Q0l[1;$#
public static void sort(int[] data) { oy{ {d
sort(data, IMPROVED_QUICK); Qx<86aKkF
} v@n0ma=
private static String[] name={ Y~,ZBl,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" rW),xfo0
}; pQ2'0u5w5
jxeZ,w o
private static Sort[] impl=new Sort[]{ 'wA4}f
new InsertSort(), V[#eeH)/
new BubbleSort(), Ct@OS227x
new SelectionSort(), xWR<>Og.
new ShellSort(), G)cEUEf d
new QuickSort(), u]`ur#_
new ImprovedQuickSort(), u?xXZ]_u-
new MergeSort(), `!- w^~c
new ImprovedMergeSort(), V d`}F0WD
new HeapSort() jc0Trs{Jf
}; DD5cUlOSu
%i6/= 'u
public static String toString(int algorithm){ Pm7lP5
return name[algorithm-1]; WA6reZ
} xX?9e3(
oeYUsnsbi
public static void sort(int[] data, int algorithm) { D\^mh{q(
impl[algorithm-1].sort(data); (:P#l&f
} D|;O9iks#
XjX
public static interface Sort { AYts &+
public void sort(int[] data); t^rw@$"}
} z|l*5@p
tq3Wga!5
public static void swap(int[] data, int i, int j) { 4.RQ3SoDa
int temp = data; ]R__$fl`8
data = data[j]; H];B?G';C
data[j] = temp; mDB
} {Mx(|)WkL
} +{J8,^z#