[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; l-v m`-_#
} R6fkc^
int i1=l; DW9MX`!Xc
int i2=mid+1; Op]*wwI*h
for(int cur=l;cur<=r;cur++){ C,eP!_O
if(i1==mid+1) +jwk4BU
data[cur]=temp[i2++]; >K,QP<B
else if(i2>r) :n{{\SSIgX
data[cur]=temp[i1++]; =JfwHFHd#
else if(temp[i1] data[cur]=temp[i1++]; @M-w8!.~
else R?:Q=7K
data[cur]=temp[i2++]; 2AhfQ%Y=
} xl,% Z~[
} lGR0-Gh2
h~9P34m
} g&F$hm
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改进后的归并排序: <W8%eRfU
2/V%jS[4#y
package org.rut.util.algorithm.support; |36%B7H
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import org.rut.util.algorithm.SortUtil; t'At9<ib
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/** ([rn.b]
* @author treeroot 25vjn 1$sW
* @since 2006-2-2 D>W&#A8&y
* @version 1.0 f9>pMfi:@
*/ <2 [vR|Q*
public class ImprovedMergeSort implements SortUtil.Sort { X=m^+%iD
SS`\_@ci
private static final int THRESHOLD = 10; H3R{+7
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/* WUz69o be
* (non-Javadoc) Un)Xe
* \ Xh C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {vW0O&[
*/ xsRkO9x
public void sort(int[] data) { e }C,)
int[] temp=new int[data.length]; 1DAU*^-
mergeSort(data,temp,0,data.length-1); |?^qsnB
} EU:N9oT
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private void mergeSort(int[] data, int[] temp, int l, int r) { T>(X`(
int i, j, k; b~tu;:
int mid = (l + r) / 2; dg#Pb@7a
if (l == r) }qp)VF
return; =e#h;x2
if ((mid - l) >= THRESHOLD) RiR],Sj
mergeSort(data, temp, l, mid); 4FYV]p8f
else MmvJ)|&t
insertSort(data, l, mid - l + 1); w$iPFZC'
if ((r - mid) > THRESHOLD) JK!`uG+v
mergeSort(data, temp, mid + 1, r); )_j(NX-C:
else v+g:0 C5 (
insertSort(data, mid + 1, r - mid); QwG_-
tpA-IL?KQw
for (i = l; i <= mid; i++) { *74/I>i
temp = data; [75?cQD
} 9@"pR;X@
for (j = 1; j <= r - mid; j++) { 4Lk<5Ho
temp[r - j + 1] = data[j + mid]; cjGN=|`u
} +\ "NPK@3
int a = temp[l]; l}(HE+?
int b = temp[r]; yId1J
for (i = l, j = r, k = l; k <= r; k++) { 4*f+np
if (a < b) { ^vSSG5 :
data[k] = temp[i++]; 5o4KV?"
a = temp; Zi]E!Tgn
} else { v8C($<3%
data[k] = temp[j--]; d#d&CJAfr
b = temp[j]; oKz!Xu%Hl
} ,37<FXX,
} &J9 + 5L8
} {y5 L
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/** 0>-}c>
* @param data _XY(Qd
* @param l c}S<<LR
* @param i aYk: CYQ
*/ [+A]E,pv]1
private void insertSort(int[] data, int start, int len) { m0.g}N-w
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); j$6Q]5KdoS
} ps`j>vX*
} hop| xtai;
} 2)$-L'YS
} ]FvGAG.*
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堆排序： FY)]yz
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package org.rut.util.algorithm.support; +zDRed_]=_
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import org.rut.util.algorithm.SortUtil; b$nev[`{6
hCgk78O?
/** }|8^+V&
* @author treeroot m&q0 _nay
* @since 2006-2-2 WO!OaC?+B,
* @version 1.0 sieC7raO
*/ oy[ px9Wx
public class HeapSort implements SortUtil.Sort{ ;{R;lF,
(5:pHX`P
/* (non-Javadoc) z"QtP[_m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) c}),yQ|!:
*/ ]^wr+9zd
public void sort(int[] data) { ]D,_<Kk
MaxHeap h=new MaxHeap(); x}WP1YyT~
h.init(data); >e.KD)qA
for(int i=0;i h.remove(); 7l*vmF6Z
System.arraycopy(h.queue,1,data,0,data.length); 726UO#*
} Rq?t=7fX)
<RC%<
private static class MaxHeap{ SEi\H$!
8sI$
void init(int[] data){ 1!U:M8T|
this.queue=new int[data.length+1]; ~g#/q~UE
for(int i=0;i queue[++size]=data; IW@phKz
fixUp(size); ;P8%yf
} !OPHS^L
} }C/+zF6q
br k*;
private int size=0; -h ^MX
cZoj|=3a
private int[] queue; g6.I~oQj
{0/2Hw n
public int get() { 4!96k~d}
return queue[1]; Hdd3n6*
} DVg$rm`
lMg#zT!?
public void remove() { 3q@JhB
SortUtil.swap(queue,1,size--); NZ!I >
fixDown(1); %WmTG }L)
} SGy2&{\Z
file://fixdown L5|g\Y`
private void fixDown(int k) { N6+^}2'*)
int j; y | I9"R
while ((j = k << 1) <= size) { X$P(8'[9A
if (j < size %26amp;%26amp; queue[j] j++; %" l;
if (queue[k]>queue[j]) file://不用交换 bBo>Y7%
break; x`IWo:j
SortUtil.swap(queue,j,k); 0u( 0*Xl
k = j; +7_U(|gO
} QSM3qke
} iG~&uEAJ
private void fixUp(int k) { ,PJC FQMR
while (k > 1) { : vgn0IQ
int j = k >> 1; Q^05n$ tI
if (queue[j]>queue[k]) 2@ZRz%(Oa&
break; NNE(jJ`/
SortUtil.swap(queue,j,k); _X=6M gU
k = j; vfmY>nr
} )z4eRs F|
} {7%HK2='
Z6Kp-z(l3
} \M0's&1(
L8NZU*"
} cc}#-HKR[
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SortUtil： 5e0d;Rd
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package org.rut.util.algorithm; UVgSO|Tg
E m+&I
import org.rut.util.algorithm.support.BubbleSort; .ns=jp
import org.rut.util.algorithm.support.HeapSort; (FgX9SV]p9
import org.rut.util.algorithm.support.ImprovedMergeSort; b+hN\/*]
import org.rut.util.algorithm.support.ImprovedQuickSort; ~.0'v [N
import org.rut.util.algorithm.support.InsertSort; HPt\ BK
import org.rut.util.algorithm.support.MergeSort; )"6"g9A
import org.rut.util.algorithm.support.QuickSort; h5-yhG
import org.rut.util.algorithm.support.SelectionSort; mieyL9*n7
import org.rut.util.algorithm.support.ShellSort; n'JS-
X{6a
/** se=^K#o
* @author treeroot }Ujgd2(U
* @since 2006-2-2 Q|S>C%4?
* @version 1.0 r_ B.bK
*/ EN}XIa>R
public class SortUtil { aD_7^8>
public final static int INSERT = 1; 5IFzbL#q#f
public final static int BUBBLE = 2; 9nFWJn
public final static int SELECTION = 3; h.l.da1#
public final static int SHELL = 4; R(cg`8
public final static int QUICK = 5; Y> }\'$\b
public final static int IMPROVED_QUICK = 6; ;)P=WS:=
public final static int MERGE = 7; &}pF6eIar
public final static int IMPROVED_MERGE = 8; D<<q5gG
public final static int HEAP = 9; 3?L[ohKH?:
?d{O'&|:
public static void sort(int[] data) { hdSP#Y'-
sort(data, IMPROVED_QUICK); Ryxu#]s
} I|<]>D-8
private static String[] name={ "zCT S
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" >gM"*Laa?
}; -p>1:M <
c14d0x{
private static Sort[] impl=new Sort[]{ ;$gV$KB:xA
new InsertSort(), %.l={B,i
new BubbleSort(), "bWx<
new SelectionSort(), k*\)z\f
new ShellSort(), MV!d*\
new QuickSort(), 4m"0R\
new ImprovedQuickSort(), s8P3H|0.-
new MergeSort(), 1,Mm+_)B
new ImprovedMergeSort(), {&B_b|g*fW
new HeapSort() @pYC!;n+
}; 'gg<)Bd
v-q-CI?B#
public static String toString(int algorithm){ .P")S|
return name[algorithm-1]; KZVdW@DY
} Rt&5s)O'
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public static void sort(int[] data, int algorithm) { -zqpjxU:
impl[algorithm-1].sort(data); o^*:
} 'd&d"E[
'g'RXC}D>
public static interface Sort { /~f[>#
public void sort(int[] data); |O oczYf
} vq+CW?*"
nLG)>L
public static void swap(int[] data, int i, int j) { x;E/
int temp = data; XBkaum4j
data = data[j]; 0j6b5<Gpc*
data[j] = temp; y%61xA`#
} W;UPA~nT~
} {f)aFGp