[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; vsPu*[%
} G{}VPcrbC
int i1=l; @JMiO^
int i2=mid+1; fhiM U8(&
for(int cur=l;cur<=r;cur++){ $4LzcwG
if(i1==mid+1) {)XTk&"
data[cur]=temp[i2++]; 79gT+~z
else if(i2>r) N8jIMb'<
data[cur]=temp[i1++]; <~)P7~$d?p
else if(temp[i1] data[cur]=temp[i1++]; ';CNGv -
else 0mE 0 j
data[cur]=temp[i2++]; Ud?Q%)X
} ^qs $v06
} %b$>qW\*&
_6Sp QW
} q V=!ORuj
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改进后的归并排序: |Cv!,]9:r
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package org.rut.util.algorithm.support; teRTu
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import org.rut.util.algorithm.SortUtil; >MZ/|`[M
h p1Bi
/** Txu/{M,
* @author treeroot )lkjqFQ(
* @since 2006-2-2 `Di{}/2
* @version 1.0 HMXE$d=[
*/ BmT!aue
public class ImprovedMergeSort implements SortUtil.Sort { i!Ba]n
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private static final int THRESHOLD = 10; _BufO7`.
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/* 5BIY<B+i
* (non-Javadoc) 4#D,?eA7
* dtDFoETz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /ZX}Nc g
*/ &>O+}>lr9
public void sort(int[] data) { \bXa&Lq
int[] temp=new int[data.length]; =;L|gtH"
mergeSort(data,temp,0,data.length-1); UQsN'r\tS
} #!=tDc &
wYea\^co
private void mergeSort(int[] data, int[] temp, int l, int r) { LVyyO3e
int i, j, k; b%+Xy8a
int mid = (l + r) / 2; a?1Wq
if (l == r) $4\j]RE!
return; *. t^MP
if ((mid - l) >= THRESHOLD) &]Tmxh(
mergeSort(data, temp, l, mid); l1I#QB@5n
else WJi]t93
insertSort(data, l, mid - l + 1); +A+)=/i;
if ((r - mid) > THRESHOLD) UKGPtKE<
mergeSort(data, temp, mid + 1, r); mpyt5#f
else y_)FA"IkE
insertSort(data, mid + 1, r - mid); Ry&6p>-
Wwo0%<2y
for (i = l; i <= mid; i++) { e-;}366}
temp = data; !WlH'y-I
} WH\d| 1)
for (j = 1; j <= r - mid; j++) { l/D} X
temp[r - j + 1] = data[j + mid]; ;uW FHc5@B
} ib m4fa
int a = temp[l]; pH;%ELZ
int b = temp[r]; /r 5eWR1G
for (i = l, j = r, k = l; k <= r; k++) { y =@N|f!
if (a < b) { 4H/OBR
data[k] = temp[i++]; SbZ6t$"
a = temp; )b)zm2;
} else { /Oono6j
data[k] = temp[j--]; Ri'n
b = temp[j]; +ZYn? #IQ
} !D6]JPX
} P>T"cv
} NK+o1
KvSG;
/** 4i bc
* @param data buC{r,
* @param l $b\P|#A
* @param i x-c"%Z|
*/ bt *k.=p
private void insertSort(int[] data, int start, int len) { -j(6;9"7]|
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); A&{Nh` q
} -Za/p@gM
} =N@t'fOr
} }]TxlSp!;
} I fir ,8
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堆排序： CLSK'+l
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package org.rut.util.algorithm.support; hZ3bVi)L\
5;?yCWc
import org.rut.util.algorithm.SortUtil; 1M-pr 8:6s
,Q B<7a+I
/** G3]4A&h9v~
* @author treeroot E7hhew
* @since 2006-2-2 rNM;ZPF#
* @version 1.0 ?%86/N>
*/ oU|c.mYe
public class HeapSort implements SortUtil.Sort{ 6zkaOA46V
B!yr!DWv
/* (non-Javadoc) dx]>(e@(t{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /?!u{(h}
*/ !k%#R4*>
public void sort(int[] data) { q4q6c")zp
MaxHeap h=new MaxHeap(); ex|F|0k4}
h.init(data); @x1-! ~z#
for(int i=0;i h.remove(); PH"%kCI:
System.arraycopy(h.queue,1,data,0,data.length); $( )>g>%
} g`^x@rj`E
V :eD]zq5
private static class MaxHeap{ =43auFY-P
5f/`Q
void init(int[] data){ 5xde;
this.queue=new int[data.length+1]; +(*DT9s+
for(int i=0;i queue[++size]=data; DlT{`
fixUp(size); 2:R+tn(F
} *I'yH8Fcn
} kT?J5u_o
v<;Md-<
private int size=0; GfG|&VNlz
'S~5"6r
private int[] queue; ~ 1pr~
(t.Nk[
public int get() { x"(KBEK~
return queue[1]; edV\-H5<
} =xrv~
E9}C #
public void remove() { zQA`/&=Y
SortUtil.swap(queue,1,size--); H"KCK6
fixDown(1); tDo"K3
} b[yiq$K/
file://fixdown 7rA;3?p)
private void fixDown(int k) { 8Y3I0S
int j; y]imZ4{/
while ((j = k << 1) <= size) { }%z
if (j < size %26amp;%26amp; queue[j] j++; aT<q=DO
if (queue[k]>queue[j]) file://不用交换 "ta x?
break; R3!t$5HG
SortUtil.swap(queue,j,k); jal-9NV)!
k = j; HThcn1u~^b
} 7KPwQ?SjT
} 3F0 N^)@
private void fixUp(int k) { V1?]|HTQcT
while (k > 1) { kLY^!
int j = k >> 1; ca}2TT&t
if (queue[j]>queue[k]) -+5>|N#
break; Tr|JYLwF
SortUtil.swap(queue,j,k); FqifriLN
k = j; b\ PgVBf9
} +3`alHUK
} [V!tVDs&'o
':}\4j&{E
} 2(nlJ7R
*dF>_F
} DN/YHSYK
h$=2p5'-
SortUtil： 8[>zG2
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package org.rut.util.algorithm; L(o15
e*!kZAf
import org.rut.util.algorithm.support.BubbleSort; V,9cl,z+
import org.rut.util.algorithm.support.HeapSort; 3[&Cg
import org.rut.util.algorithm.support.ImprovedMergeSort; .G^YqJ 4
import org.rut.util.algorithm.support.ImprovedQuickSort; h1{3njdr
import org.rut.util.algorithm.support.InsertSort; ~v83pu1!2s
import org.rut.util.algorithm.support.MergeSort; 5?L<N:;J_
import org.rut.util.algorithm.support.QuickSort; KU;9}!#
import org.rut.util.algorithm.support.SelectionSort; Q &t<Y^B
import org.rut.util.algorithm.support.ShellSort; iCyfOh
_rYkis^u
/** [r-p]"R
* @author treeroot 1sCR4L:+
* @since 2006-2-2 <ih[TtZ
* @version 1.0 -![|}pX
*/ +*^H#|!
public class SortUtil { }-fl$j?9E
public final static int INSERT = 1; " Jr-J#gg
public final static int BUBBLE = 2; &[SC|=U'M
public final static int SELECTION = 3; kN>!2UfNS
public final static int SHELL = 4; `"~%bS
public final static int QUICK = 5; QM]YJr3rE
public final static int IMPROVED_QUICK = 6; @P"p+
public final static int MERGE = 7; G\?YK.Y>
public final static int IMPROVED_MERGE = 8; "]iB6
public final static int HEAP = 9; B?qjkP
:L;a:xSpn=
public static void sort(int[] data) { "\=U)CJ
sort(data, IMPROVED_QUICK); "vGW2~*)
} D-4f.Tq4#
private static String[] name={ JLi|Td"1%
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" :ivf/xn
}; j=J/x:w_e
?rIx/>C9
private static Sort[] impl=new Sort[]{ g ci
new InsertSort(), 0^ibNiSP
new BubbleSort(), '\GbmD^F
new SelectionSort(), v}x&?fU `
new ShellSort(), G9:l'\
new QuickSort(), V> bCKtf&
new ImprovedQuickSort(), j5ve2LiFV%
new MergeSort(), EIQ p>|5
new ImprovedMergeSort(), [9 RR8
new HeapSort() gdoLyxQ
}; -gWZwW/lD
PT9*)9<L
public static String toString(int algorithm){ Faf&U%]*`
return name[algorithm-1]; ~nPtlrQa#*
} %#}Zy
qv"$Bd:]r
public static void sort(int[] data, int algorithm) { o lxByzTh>
impl[algorithm-1].sort(data); O<\@~U
} j)GtEP<n#
* H9 8Du
public static interface Sort { W];dD$Oqg
public void sort(int[] data); m_l[MG\
} A4ygW:
P2*<GjV`S/
public static void swap(int[] data, int i, int j) { "T"h)L<
int temp = data; ##o#eZq:"
data = data[j]; ``Un&-Ms
data[j] = temp; L^Fy#p
} (M ~e?s
} ,1##p77.