[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; "0p +SZ~D
} Tq_1wX'\
int i1=l; q_OY sg
int i2=mid+1; )cfp(16
for(int cur=l;cur<=r;cur++){ 2y&_Z^kI?
if(i1==mid+1) PTfN+
data[cur]=temp[i2++]; +ytT)S
else if(i2>r) e/g<<f-
data[cur]=temp[i1++]; $sB48LJuU'
else if(temp[i1] data[cur]=temp[i1++]; cN0~;!{i
else ~GsH8yA_P
data[cur]=temp[i2++]; A?%XO %
} UtHmM,*I
} S}XB |
7=9A_4G!
} xF\}.OfWG
b7F3]W<`&
改进后的归并排序: -;W\f<q]
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package org.rut.util.algorithm.support; )j)y5_m
ru(?a~lF8~
import org.rut.util.algorithm.SortUtil; R(n0!h4
k}+MvGq
/** M4L~bK
* @author treeroot =PeW$q+
* @since 2006-2-2 5,G<}cd
* @version 1.0 o{YW
*/ Q9Xmb2LN
public class ImprovedMergeSort implements SortUtil.Sort { qW`XA
-Lz1#Sk]A
private static final int THRESHOLD = 10; .3g\[p
sk%:Sp
/* iPtm@f,bI
* (non-Javadoc) ~]i]kU
* (<AM+|
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MFCbx>#
*/ "=v J}
public void sort(int[] data) { }hObtAS
int[] temp=new int[data.length]; i&SBW0)
mergeSort(data,temp,0,data.length-1); M25z<Y
} o+6^|RP
A{n*NxKCX!
private void mergeSort(int[] data, int[] temp, int l, int r) { }X W#?l
int i, j, k; =":V WHf
int mid = (l + r) / 2; {) '" k6w
if (l == r) SjNwT[.nr7
return; u0 'pR# m|
if ((mid - l) >= THRESHOLD) n<"a+TTU
mergeSort(data, temp, l, mid); (fLbg,
else bW 79<T'+
insertSort(data, l, mid - l + 1); MIMPJXT#.
if ((r - mid) > THRESHOLD) F6neG~Y
mergeSort(data, temp, mid + 1, r); O}\"$n>
else BR0p0%
insertSort(data, mid + 1, r - mid); QeOt;{_|
bQ:3G;
for (i = l; i <= mid; i++) { _c7
temp = data; s'fcAh,c6
} L-X _b3E\
for (j = 1; j <= r - mid; j++) { F" #3s=
temp[r - j + 1] = data[j + mid]; /v5g;x_T
} O.40^u~
int a = temp[l]; JXa%TpI: E
int b = temp[r]; %;\2QI`R
for (i = l, j = r, k = l; k <= r; k++) { ?RjKP3P
if (a < b) { iJp!ROI
data[k] = temp[i++]; MdTd$ 4J3
a = temp; f+W[]KK*PW
} else { 0T{Y_IG
data[k] = temp[j--]; cK}
b = temp[j]; %w|3:
} HuLm!tCu
} d-S'y-V?d
} 0R!}}*Ee>q
BKlc{=
/** 5t1DB'K9$_
* @param data A,CPR0g%
* @param l I`}vdX)
* @param i (j8,n<o
*/ qFsg&<
private void insertSort(int[] data, int start, int len) { OQb9ijLeK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); vYm&AD
} ?~y(--.t;T
} kAF}*&Kzd~
} ,8 NEnB
} (9q{J(44
Xs,PT
堆排序： U&\{/l
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package org.rut.util.algorithm.support; tS\NO@E_Jh
qN,FX#DP
import org.rut.util.algorithm.SortUtil; U=#ylQ
(c|qX-%rC
/** Jt, 4@
* @author treeroot /Gv$1t^a
* @since 2006-2-2 w3cK: C0
* @version 1.0 M[N.H9
*/ M4PUJZ]
public class HeapSort implements SortUtil.Sort{ :\;uJ5
Ck a]F2,
/* (non-Javadoc) ,%G2>PBt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) A|OC?NZY
*/ H 1X]tw.
public void sort(int[] data) { f0bV]<_9
MaxHeap h=new MaxHeap(); M{RZ-)IC
h.init(data); +7OT`e %q
for(int i=0;i h.remove(); &_hCs![
System.arraycopy(h.queue,1,data,0,data.length); u9~J1s<e
} O7*i;$!R
5VoiDM=\c
private static class MaxHeap{ j;'Wf[V
:R\v# )C
void init(int[] data){ GQBN-Qv
this.queue=new int[data.length+1]; F76h
for(int i=0;i queue[++size]=data; %Z0S"B 3
fixUp(size); RYaofW
} ,PxQ[CGg
} L umD.3<
*%BI*p
private int size=0; 7V``f:#d
/ {~h?P}
private int[] queue; {# _C
WN1-J(x6
public int get() { s4k%ty}
return queue[1]; <t@*[Aw
} _\;#a
`I{Q,HQ7
public void remove() { kovzB]
SortUtil.swap(queue,1,size--); 2` qXDfD`
fixDown(1); 3mz>Y*^?0
} E1g$WhXIS
file://fixdown :[03upyS
private void fixDown(int k) { |%;txD
int j; 4 Z)]Cq*3
while ((j = k << 1) <= size) { - Sgp,"a
if (j < size %26amp;%26amp; queue[j] j++; VbR.tz
if (queue[k]>queue[j]) file://不用交换 3vD,hL`&
break; ^uzVz1%mM
SortUtil.swap(queue,j,k); @'4D9A
k = j; S,%HW87
} ~C x2Q4E
} RL9BB.
private void fixUp(int k) { l/NK.Jr
while (k > 1) { ir#^5e@
int j = k >> 1; ZW%`G@d"H-
if (queue[j]>queue[k]) u;}B4Rx
break; HArYL}l
SortUtil.swap(queue,j,k); CU_06A|}
k = j; 6P|neb}
} 4*W7{MPY
} RoRVu,1
k({8C`&tK/
} =1capix 1r
(5_(s`q.
} Pme?`YO$x
N/VIP0Kb
SortUtil： 6'zy"UkH
RoZV6U~
package org.rut.util.algorithm; 5yID%
)I4tl/
import org.rut.util.algorithm.support.BubbleSort; h6t>yC\
import org.rut.util.algorithm.support.HeapSort; A>puk2s
import org.rut.util.algorithm.support.ImprovedMergeSort; h@d m:=ul
import org.rut.util.algorithm.support.ImprovedQuickSort; P+UK@~D+G
import org.rut.util.algorithm.support.InsertSort; H_FhHX.2(
import org.rut.util.algorithm.support.MergeSort; _T$\$v$ {
import org.rut.util.algorithm.support.QuickSort; .@Cshj
import org.rut.util.algorithm.support.SelectionSort; kz^G.5n
import org.rut.util.algorithm.support.ShellSort; KK6YA
.bGeZwvf:G
/** Sj?'T@
* @author treeroot b'YbHUyu
* @since 2006-2-2 t/g}cR^Q
* @version 1.0 .$iIr:Tc>
*/ 7@?b_
public class SortUtil { -E7\.K3
public final static int INSERT = 1; f]}F_]
public final static int BUBBLE = 2; *$!LRmp?
public final static int SELECTION = 3; ?H&p zY~H
public final static int SHELL = 4; j^.P=;
public final static int QUICK = 5; (L1`]cp
public final static int IMPROVED_QUICK = 6; j*{bM{~T<
public final static int MERGE = 7; YaU A}0cW
public final static int IMPROVED_MERGE = 8; V_* ^2c)
public final static int HEAP = 9; +,lD_{}_
jYkx]J%S
public static void sort(int[] data) { & \m\QI
sort(data, IMPROVED_QUICK); gi)/iz`
} fVM%.`
private static String[] name={ _$0Ix6y,
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Tx5L
}; 1;W>ceN"
'SmdU1]4BD
private static Sort[] impl=new Sort[]{ 4]bTO
new InsertSort(), PewLg<?,G4
new BubbleSort(), 9O"?T7i"#
new SelectionSort(), <Yc:,CU
new ShellSort(), i,'~Ds
new QuickSort(), }/VHeHd
new ImprovedQuickSort(), vl<J-+|0C
new MergeSort(), 'Khq!pC
new ImprovedMergeSort(), \&H%k
new HeapSort() /y0 )r.R
}; B:4u2/!5
.\VjS^o&Z&
public static String toString(int algorithm){ =BtEduz
return name[algorithm-1]; p,Z6/e[SI
} sR6(8
!o@-kl
public static void sort(int[] data, int algorithm) { ^6*? a9jO>
impl[algorithm-1].sort(data); 4M_83WL
} ^.(]i\V_
V/Q6v YX
public static interface Sort { (]1%s?ud*
public void sort(int[] data); *%O1d.,
} N(9'U0z
9hv\%_>o
public static void swap(int[] data, int i, int j) { yhIg)/?L
int temp = data; HiC\U%We
data = data[j]; s+[=nau('w
data[j] = temp; #'T|,xIr-Q
} cZu:dwE
} $\bH5|Hk]