[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; /6rQ.+|).
} vz(=3C[
int i1=l; g(auB/0s
int i2=mid+1; sSf;j,7V
for(int cur=l;cur<=r;cur++){ 9OFH6-;6`\
if(i1==mid+1) ^*YoNd_kpN
data[cur]=temp[i2++]; %K+hG=3O
else if(i2>r) ,PoG=W
data[cur]=temp[i1++]; \K9.]PfbI
else if(temp[i1] data[cur]=temp[i1++]; LGw-cX #
else _Ss}dU9
data[cur]=temp[i2++]; )Tieef*Q~
} .820~b0
} tU$n3Bg
q44vI
} WJxcJE
a x)J!I18
改进后的归并排序: pTaC$Ne
+PnuWK$
package org.rut.util.algorithm.support; 7Vk9{x$z
Ml9m#c
import org.rut.util.algorithm.SortUtil; ,{\Ae"{6
aS[y\9(**
/** ck%.D%=
* @author treeroot xbxzB<yL
* @since 2006-2-2 {Mj- $G"
* @version 1.0 KwV!smi2
*/ }9^'etD
public class ImprovedMergeSort implements SortUtil.Sort { Buso `G
=E$bZe8
private static final int THRESHOLD = 10; A9g/At_
33KCO
/* (f^/KB=
* (non-Javadoc) ~3-"1E>Rgy
* t^Lb}A#$4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HY eCq9S
*/ } xA@3RT
public void sort(int[] data) { 3#x1(+c6
int[] temp=new int[data.length]; m]*a;a'}#
mergeSort(data,temp,0,data.length-1); Niu |M@
} N p*T[J
\D k >dE&I
private void mergeSort(int[] data, int[] temp, int l, int r) { 7x77s
int i, j, k; g-jg;Ri
int mid = (l + r) / 2; oOc-1C y
if (l == r) St(jrZb
return; B|V!=r1%
if ((mid - l) >= THRESHOLD) r\#nBoo(
mergeSort(data, temp, l, mid); 6&5D4 V
else jz HWs
insertSort(data, l, mid - l + 1); e`U 6JzC
if ((r - mid) > THRESHOLD) 5~Ek_B
mergeSort(data, temp, mid + 1, r); kN3 <l7
else cHVJ7yAZI
insertSort(data, mid + 1, r - mid); `k*;%}X\
qdy(C^(fa
for (i = l; i <= mid; i++) { u,nn\>Y
temp = data; ES!e/l
} GRJ6|T$!?$
for (j = 1; j <= r - mid; j++) { VwRZgL
temp[r - j + 1] = data[j + mid]; Qd\='*:!
} cl1ygpf(
int a = temp[l]; n_rpT.[
int b = temp[r]; 9BpxbU+L;
for (i = l, j = r, k = l; k <= r; k++) { /F9Dg<#a
if (a < b) { j!NXNuy:
data[k] = temp[i++]; @;KYvDY
a = temp; qBcbMa9m
} else { oemN$g&7
data[k] = temp[j--]; SUIJ{!F/
b = temp[j]; `R xCs`
} !q,7@W3i
} 'K02T:\iZ
} l`l6Y>c*]
^|zag
/** qy.$5-e:[9
* @param data XkkzY5rxOc
* @param l !;mn]wR>a
* @param i iLJ@oM;2
*/ z;P#
private void insertSort(int[] data, int start, int len) { F!g1.49""
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rNJU & .]
} o~e_M-
} !hM`Oe`S
} ;-JFb$m
} !ht2*8$lQ
E:M,nSc)53
堆排序： 4eB oR%2o
6it [i@*"
package org.rut.util.algorithm.support; u?fM.=/N
t:V._@
import org.rut.util.algorithm.SortUtil; 0G-obHe0
9G2rVk
/** o?m1
* @author treeroot />}zB![(K
* @since 2006-2-2 +jZa A/
* @version 1.0 ;,6C&|n]w
*/ -0<vmU
public class HeapSort implements SortUtil.Sort{ sbX7VfAR`
j;b>~_ U%
/* (non-Javadoc) ~E((n
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) _aOs8#(X
*/ X<.l(9$
public void sort(int[] data) { %XeN_ V
MaxHeap h=new MaxHeap(); TfkGkVR
h.init(data); gED|2%BXb
for(int i=0;i h.remove(); 1\UU"
System.arraycopy(h.queue,1,data,0,data.length); ilVi
} jSHFY]2
6;:D!},'c
private static class MaxHeap{ .%7Le|Fb"
g(X`.0
void init(int[] data){ <QFayZ$
this.queue=new int[data.length+1]; +D4m@O
for(int i=0;i queue[++size]=data; CmbgEGIh[a
fixUp(size); Xe_djy'8
} QwpX3 k6
} 'h0>]A 2|X
mRC3w(W
private int size=0; -6I*k |%8T
EVZ1Z
private int[] queue; `pCy:J?d>l
8rS;}Bt
public int get() { e(a,nZF.
return queue[1]; 2]9 2J
} |n tWMm:(
^7? WR?!
public void remove() { =y@0il+V
SortUtil.swap(queue,1,size--); $\vNSTE
fixDown(1); ,{S $&g*
} "ldd&><
file://fixdown 4v_Hh<%
private void fixDown(int k) { ,aUbB8
int j; 0fBwy/:
while ((j = k << 1) <= size) { /3rNX}tOMH
if (j < size %26amp;%26amp; queue[j] j++; 2jC:uk
if (queue[k]>queue[j]) file://不用交换 ogQfzk
break; Z}0xK6
SortUtil.swap(queue,j,k); gsEcvkj*
k = j; ]i6*$qgma
} \+sa[jK
} ^78N25RU(
private void fixUp(int k) { aACPyfGQ
while (k > 1) { a?nK|Q=e
int j = k >> 1; YJHb\Cf.
if (queue[j]>queue[k]) `Rfe*oAf
break; ,D }Ka?
SortUtil.swap(queue,j,k); k)Lhzr[
k = j; 1;c>#20
} C{^I}p
} |;~2y>E
LXxQI(RO
} p&Qm[!
{D",ao
} \db=]L=|
CC"a2Hu/
SortUtil： M[z1B!rT
L>1y[ Q
package org.rut.util.algorithm; 5vR])T/S0
z&9MkbH1
import org.rut.util.algorithm.support.BubbleSort; w.J$(o(/
import org.rut.util.algorithm.support.HeapSort; gy,)%{,G
import org.rut.util.algorithm.support.ImprovedMergeSort; X\H P{$fY_
import org.rut.util.algorithm.support.ImprovedQuickSort; Rzsu 7w
import org.rut.util.algorithm.support.InsertSort; j0~c2
import org.rut.util.algorithm.support.MergeSort; C@:X9NU
import org.rut.util.algorithm.support.QuickSort; FGP^rTP)e
import org.rut.util.algorithm.support.SelectionSort; /ivVqOo
import org.rut.util.algorithm.support.ShellSort; Yl'8" \HF
Dzu//_u
/** Pf%I6bVN9
* @author treeroot Zazs".
* @since 2006-2-2 ^swj!da
* @version 1.0 Tq)hAZ
*/ \}.bTca
public class SortUtil { W$,/hB& z
public final static int INSERT = 1; %>9L}OAm
public final static int BUBBLE = 2; [QQM/?
public final static int SELECTION = 3; _oG%bNM
public final static int SHELL = 4; hg0{x/Dgny
public final static int QUICK = 5; x`C"Z7t
public final static int IMPROVED_QUICK = 6; _6h.<BR
public final static int MERGE = 7; Hik=(pTu>
public final static int IMPROVED_MERGE = 8; oLX[!0M^
public final static int HEAP = 9; yl@Nyu
S _U |w9q
public static void sort(int[] data) { 8LPWT!S
sort(data, IMPROVED_QUICK); %B#T"=Cx
} zY*~2|q,s
private static String[] name={ Cc{{9Ud
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N3\RXXY
}; D4hT Hh
W*_c*
private static Sort[] impl=new Sort[]{ <N~9=g3
new InsertSort(), +UX~'t_'v
new BubbleSort(), T!9AEG
new SelectionSort(), =$y J66e
new ShellSort(), )nj fqg
new QuickSort(), >2),HZp^I
new ImprovedQuickSort(), P=<lY},
new MergeSort(), rf@47H
new ImprovedMergeSort(), jLMy27Cn
new HeapSort() Pn9;&`t
}; m(9I+`
D{\o*\TN
public static String toString(int algorithm){ |X XO0
return name[algorithm-1]; }xBO;
} zd$?2y8
Hu6Qr
public static void sort(int[] data, int algorithm) { .IY@Q
impl[algorithm-1].sort(data); $")Gd@aR
} FMF mn|
C|IHRw`[
public static interface Sort { "bRjY?D
public void sort(int[] data); /\mYXi\
} LQ%QFfC
E.Th}+
public static void swap(int[] data, int i, int j) { $vO<v<I'Gb
int temp = data; <{;'0> ToM
data = data[j]; @oH\r-jsgu
data[j] = temp; .XeZjoJ$z
} EJ<L,QH3
} I Ij:3HP