[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; A#RA;Dt:
} 5;oWFl
int i1=l; IM|VGT0
int i2=mid+1; i-~HT4iw
for(int cur=l;cur<=r;cur++){ z{Z'2,#
if(i1==mid+1) 4*d$o=wa
data[cur]=temp[i2++]; {<o_6 z`$
else if(i2>r) i]a 5cn
data[cur]=temp[i1++]; rg)>ZHx
else if(temp[i1] data[cur]=temp[i1++]; x6\EU=,
else jQ@z!GirT
data[cur]=temp[i2++]; R}>xpU1
} *=mtt^yZ
} 8-3]Bm!
9^QiFgJy
} iyAeR!`
DXl3
改进后的归并排序: <XiHQ B!
e82SG8#]
package org.rut.util.algorithm.support; thIuK V{CO
pca `nN!
import org.rut.util.algorithm.SortUtil; <43O,Kx'Su
d}j%.JJK
/** .z4 fJx
* @author treeroot n|sP0,$N1
* @since 2006-2-2 ET;YAa*
* @version 1.0 NK;%c-r0v7
*/ ~CCRs7V/L
public class ImprovedMergeSort implements SortUtil.Sort { 1p=^I'#
MdmS
private static final int THRESHOLD = 10; {.qeVE{
5P-7"g ca
/* fmrd7*MW
* (non-Javadoc) \/J>I1J
* }m0*w3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @(M-ZO!D
*/ {fFZ%$
public void sort(int[] data) { s(jixAf
int[] temp=new int[data.length]; S#_g/3w
mergeSort(data,temp,0,data.length-1); 3cfW|J
} w=H
]=!wMn**
private void mergeSort(int[] data, int[] temp, int l, int r) { ?~c=Sa-
int i, j, k; W{:^P0l
int mid = (l + r) / 2; /I}#0}
if (l == r) :_V9Jwu
return; ~o_0RB
if ((mid - l) >= THRESHOLD) >uT,Z,7O
mergeSort(data, temp, l, mid); /5 yjON{
else &u&+:m
insertSort(data, l, mid - l + 1); X)^eaw]Q0
if ((r - mid) > THRESHOLD) E7X6Shng
mergeSort(data, temp, mid + 1, r); AGu#*,K
else Z> Jm
insertSort(data, mid + 1, r - mid); .P(k |D&
p^QZGu-.W
for (i = l; i <= mid; i++) { BBuI|lr
temp = data; j}O~6A>|
} UgI0 *PE2
for (j = 1; j <= r - mid; j++) { ~SUrbRaY>
temp[r - j + 1] = data[j + mid]; z#9Tg"8]
} }zC9;R(E
int a = temp[l]; d1]CN6 7{G
int b = temp[r]; 3+vbA;R
for (i = l, j = r, k = l; k <= r; k++) { N$]B$vv
if (a < b) { ehCGu(=
data[k] = temp[i++]; )N$T&
a = temp; Nc;cb
} else { d1CQ;,Df<
data[k] = temp[j--]; @9#l3
b = temp[j]; c IK
} %d?.v_Hu0
} mbT4K8<^
} XzLB#0
&?X0;,5)
/** 1%Hc/N-
* @param data jHjap:i`cI
* @param l Nl/^ga
* @param i @cYb37)q=
*/ W D8
private void insertSort(int[] data, int start, int len) { j=|cx+nb
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); MXQua:&HW
} wNc.z*+O"H
} $O nh2 ^
} ]q^6az(Ud
} ? nx3#<
K(jo[S
堆排序： E;v#'
(|O9L s7N
package org.rut.util.algorithm.support; FgwIOpqE*
$[f-{B{>*
import org.rut.util.algorithm.SortUtil; 7slpj8
Cp"a,%b6u
/** WSEw:pln
* @author treeroot hK]mnA[Y
* @since 2006-2-2 %lsRj)n
* @version 1.0 7:/gO~gI
*/ <|-da&7
public class HeapSort implements SortUtil.Sort{ |WP}y-Au
Xz,fjKUnN
/* (non-Javadoc) Lf0X(tC
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) tuK2D,6
*/ jD}G9=[$1
public void sort(int[] data) { wWkMvs
MaxHeap h=new MaxHeap(); ?iXN..6x
h.init(data); 8MQb5( !
for(int i=0;i h.remove(); I9 (6
System.arraycopy(h.queue,1,data,0,data.length); WwDd62g
} @T.+:U@S
J2ZV\8t
private static class MaxHeap{ d#8 n<NM
jw5ldC>U
void init(int[] data){ )kMF~S|H
this.queue=new int[data.length+1]; 0RZ[]:(
for(int i=0;i queue[++size]=data; Oa.84a
fixUp(size); VW`SqUl
} WuuF&0?8C
} B6kc9XG
}INj~d<:
private int size=0; ;F_pF+&q
gpw,bV
private int[] queue; %6.WGuO
rdH3!
public int get() { m?O~(6k@C
return queue[1]; J?C#'2/
} n58yR -"
fI v?HD:j
public void remove() { !!k^M"e2
SortUtil.swap(queue,1,size--); p>N8g#G
fixDown(1); [$X^r<|P@
} emSky-{$u
file://fixdown (b;Kl1Ql]
private void fixDown(int k) { Sx8RH),k
int j; X$2f)3
while ((j = k << 1) <= size) { =u-q#<h4;
if (j < size %26amp;%26amp; queue[j] j++; %?hvN
if (queue[k]>queue[j]) file://不用交换 y{KYR)
break; q6PG=9d0B
SortUtil.swap(queue,j,k); S4U}u l
k = j; [H[L};%=j
} KAJR.YNm
} 5) q_Aro
private void fixUp(int k) { ^c<8|lK L@
while (k > 1) { {E[t(Ig
int j = k >> 1; s*Nb=v.e9
if (queue[j]>queue[k]) bj6;>Ezp3(
break; d&* c3F
SortUtil.swap(queue,j,k); 2@N9Zk{{J
k = j; ZsNZ3;d@u(
} ZEK,Z['
} OO2uE ;( 3
S]&:R)#@
} c)3.AgT
@<.ei)cqb
} L} "bp
u69UUkG
SortUtil： {/j gB"9
R<B5<!+
package org.rut.util.algorithm; esiU._:u
D0Mxl?S?
import org.rut.util.algorithm.support.BubbleSort; &,P; 7R
import org.rut.util.algorithm.support.HeapSort; a&2UDl%K
import org.rut.util.algorithm.support.ImprovedMergeSort; [vY#9W"!
import org.rut.util.algorithm.support.ImprovedQuickSort; ]Cs=EZr
import org.rut.util.algorithm.support.InsertSort; WG&! VK
import org.rut.util.algorithm.support.MergeSort; 9W0*|!tQ,+
import org.rut.util.algorithm.support.QuickSort; dS8ydG2
import org.rut.util.algorithm.support.SelectionSort; g< xE}[gF
import org.rut.util.algorithm.support.ShellSort; BRy3D\}
PJ)l{c
/** ur.krsU
* @author treeroot 78\j
* @since 2006-2-2 +[R^ ?~VK
* @version 1.0 O{EPq' x
*/ OxPl0-]t
public class SortUtil { &) 64:l&
public final static int INSERT = 1; &:&~[4>%a
public final static int BUBBLE = 2; ,5V6=pr$
public final static int SELECTION = 3; %AN,cE*
public final static int SHELL = 4; L+S)hgUH
public final static int QUICK = 5; #*q]^Is"
public final static int IMPROVED_QUICK = 6; nG";?TT
public final static int MERGE = 7; ;\v&4+3S
public final static int IMPROVED_MERGE = 8; 2F+"v?n=\
public final static int HEAP = 9; :c|Om{;
GM8Q#vc
public static void sort(int[] data) { H|_@9V
sort(data, IMPROVED_QUICK); ?YMBZ
} `Se2f0",
private static String[] name={ @ta:9wZ
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" -u(,*9]cJ*
}; Lk!m1J5
DS;\24>H
private static Sort[] impl=new Sort[]{ ] s^7c
new InsertSort(), v6|j.;
new BubbleSort(), )Q62I\
new SelectionSort(), BT&R:_:
new ShellSort(), gxhdxSm=2
new QuickSort(), -uxU[E
new ImprovedQuickSort(), ol41%q*
new MergeSort(), '}9 Nvr)+
new ImprovedMergeSort(), EjFn\|VK
new HeapSort() 0%Le*C'yk
}; F b?^+V]9
ZY8w1:'
public static String toString(int algorithm){ tkH]_cH'w
return name[algorithm-1]; g^Hf^%3xP
} /@|iI<|
UWnF2,<s;
public static void sort(int[] data, int algorithm) { o">~ObR
impl[algorithm-1].sort(data); Ka6u*:/
} I`(53LCqo
`Th~r&GvF
public static interface Sort { (6B;
public void sort(int[] data); %.hJDX\j
} up+0-!AH
Y6&v&dA;
public static void swap(int[] data, int i, int j) { 'YB[4Q /0
int temp = data; PJ;WNo8
data = data[j]; 6}m`_d?
data[j] = temp; Lu{/"&)
} G^tazAEfo
} :'B(DzUR