[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; 4\v~HFsv
} Z&TD+fT<
int i1=l; i"/r)>"b
int i2=mid+1; HS7R lU^
for(int cur=l;cur<=r;cur++){ MY&<)|v\
if(i1==mid+1) Mk<m6E$L
data[cur]=temp[i2++]; IT,"8s
else if(i2>r) QDP-E[
data[cur]=temp[i1++]; SzRL}}I
else if(temp[i1] data[cur]=temp[i1++]; 2%bhW,?I
else :g&>D#{
data[cur]=temp[i2++]; GX7VlI[
} eDuX"/kHA
} tAaYL \~
&.hoCPo$
} JL@F~U9
v<j2L"bj
改进后的归并排序: W^wd ([
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package org.rut.util.algorithm.support; ~'(9?81d
yz2(_@R
import org.rut.util.algorithm.SortUtil; Tu==49
@sN^BX`z
/** E{<?l 7t
* @author treeroot "=FIFf
* @since 2006-2-2 anLbl#UV
* @version 1.0 Q<dba12
*/ *JwFD^<j
public class ImprovedMergeSort implements SortUtil.Sort { cY{I:MA+h@
Q^nG0<q+
private static final int THRESHOLD = 10; [@g~
" l.!Ed
/* f7.m=lbe
* (non-Javadoc) P7'M],!9w
* '\@WN]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )4PB<[u
*/ |%-YuD
public void sort(int[] data) { Rb?~ Rs\
int[] temp=new int[data.length]; y!F:m=x<
mergeSort(data,temp,0,data.length-1); |l$ u<3
} T=.-Cl1A
g2A"1w<-AH
private void mergeSort(int[] data, int[] temp, int l, int r) { ci;&CHa
int i, j, k; -7&?@M,u
int mid = (l + r) / 2; j+nv=p
if (l == r) (p^S~Ax
return; FbmsN)mv!%
if ((mid - l) >= THRESHOLD) 1PmX."a
mergeSort(data, temp, l, mid); k2pT1QZnt
else :fhB*SYK
insertSort(data, l, mid - l + 1); *aI~W^N3
if ((r - mid) > THRESHOLD) 3XnE y +
mergeSort(data, temp, mid + 1, r); # 9V'';:
else RTZ:U@
insertSort(data, mid + 1, r - mid); Q~8y4=|#CY
lz- iCZ
for (i = l; i <= mid; i++) { s88y{o
temp = data; 2g0K76=Co:
} I-TlrW=t
for (j = 1; j <= r - mid; j++) { <vL}l:r
temp[r - j + 1] = data[j + mid]; f*v1J<1#
} *G\=i A
int a = temp[l]; =Aj"j-r&{
int b = temp[r]; %oR>Uo
for (i = l, j = r, k = l; k <= r; k++) { M= atls
if (a < b) { u"\=^F
data[k] = temp[i++]; Xty#vI
a = temp; |J\,F.{'
} else { G#|Hu;C6"
data[k] = temp[j--]; K0LbZMn,/
b = temp[j]; :4U0I:J#
} 2?*||c==*
} vsc&Ju%k
} }{A?PHV5
j"i#R1T
/** \x(.d.l/
* @param data UP?D@ogl<
* @param l j6HR&vIM
* @param i xuF5/(__
*/ g[AA,@p+
private void insertSort(int[] data, int start, int len) { j!7Qw 8
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZRPE-l_3:
} my4\mi6P
} %/Bvy*X&
} 0lBat_<8
} ldYeX+J _
{!MVc<G.
堆排序： an.`dBm
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package org.rut.util.algorithm.support; B2Qp}
e+l\\9v
import org.rut.util.algorithm.SortUtil; !:dL~n
VE*j*U j
/** _!%M%
* @author treeroot (U_wp's
* @since 2006-2-2 qv$!\T
* @version 1.0 H}B2A"
*/ Jl_~_Z
public class HeapSort implements SortUtil.Sort{ r,Ds[s)B
7pP+5&*
/* (non-Javadoc) 95[wM6?J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) bb}?h]a
*/ IqNpLh|[
public void sort(int[] data) { h07eEg
MaxHeap h=new MaxHeap(); /7x\;&bc
h.init(data); HgaZbb>'
for(int i=0;i h.remove(); ^j[Ku
System.arraycopy(h.queue,1,data,0,data.length); X5 j=C]
} ifvU"l
GZ"&L?ti
private static class MaxHeap{ x^X$M$o,l
mbGcDG[HQ
void init(int[] data){ *Wso3 6an
this.queue=new int[data.length+1]; p&\K9hfi
for(int i=0;i queue[++size]=data; XddHP;x
fixUp(size); K0oFPDJN
} qF'~F`6
} Fe5jdV<
\q,s?`+B
private int size=0; @0D![oA
TW2Z=ks=
private int[] queue; x2@,9OUx
$ o" L;j
public int get() { SHwRX? B|
return queue[1]; yjFe'
} WcU@~05b
Ok*Z
public void remove() { >T QZk4$
SortUtil.swap(queue,1,size--); {\L|s5=yr
fixDown(1); @C=M UT-!
} #52NsVaT@
file://fixdown |by@ :@*y
private void fixDown(int k) { /p 5=i
int j; vf N#NY6
while ((j = k << 1) <= size) { &wb9_?ir-
if (j < size %26amp;%26amp; queue[j] j++; !)nD xM`p
if (queue[k]>queue[j]) file://不用交换 I-bF{
break; Yg&` U^7]B
SortUtil.swap(queue,j,k); rnH}#u+
k = j; rH.gF43O:
} 6rT4iC3Q{
} _Z.cMYN
private void fixUp(int k) { {-h, ZdH^
while (k > 1) { m:3J!1
int j = k >> 1; Z7KXWu+6`m
if (queue[j]>queue[k]) .jargvAL*
break; {>h97}P
SortUtil.swap(queue,j,k); B4^`Sw
k = j; 79wLT\&
} U!0E_J
} kW+G1|
,VWGq@o%
} lJ&y&N<O
O|7yP30?M
} R6<4"?*r
Cg3ODfe
SortUtil： H-2_j
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package org.rut.util.algorithm; 3q?5OL^$
`kPc!I7Y
import org.rut.util.algorithm.support.BubbleSort; ;`X~ k|7K
import org.rut.util.algorithm.support.HeapSort; YZ**;"<G
import org.rut.util.algorithm.support.ImprovedMergeSort; u7#z^r
import org.rut.util.algorithm.support.ImprovedQuickSort; 3~<}bee5|q
import org.rut.util.algorithm.support.InsertSort; i.M2E$b|
import org.rut.util.algorithm.support.MergeSort; G0/>8_Q>Nr
import org.rut.util.algorithm.support.QuickSort; f?maa5S
import org.rut.util.algorithm.support.SelectionSort; ^j=bObaX
import org.rut.util.algorithm.support.ShellSort; ${>DhfF
Sr"/-
/** fI]bzv;
* @author treeroot mW +tV1XjG
* @since 2006-2-2 .8(%4ejJ(
* @version 1.0 ;UpJ=?W
*/ :Eo8v$W\RB
public class SortUtil { vI|As+`$d
public final static int INSERT = 1; ESv:1o`?n
public final static int BUBBLE = 2; L/fRF"V
public final static int SELECTION = 3; VaJfD1zd1
public final static int SHELL = 4; Onw24&
public final static int QUICK = 5; c{VJ2NQ+
public final static int IMPROVED_QUICK = 6; N5!&~~
public final static int MERGE = 7; )$_,?*fq:
public final static int IMPROVED_MERGE = 8; )*D'csGc
public final static int HEAP = 9; ] D6|o5
lkwh'@s.
public static void sort(int[] data) { {g_@Tuu
sort(data, IMPROVED_QUICK); .`J:xL%Z
} Gkmsaf>
private static String[] name={ "lrA%~3%[P
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" N,|r1u9X#
}; A?,A(-0C
$:;%bjSI
private static Sort[] impl=new Sort[]{ wDw<KU1UK
new InsertSort(), IT&i,`cJ~F
new BubbleSort(), no|Gq>Xp
new SelectionSort(), TY6 rwU
new ShellSort(), +NR n0 z(
new QuickSort(), *<q4S(l
new ImprovedQuickSort(), ]| WA#8_|
new MergeSort(), ]EN&SWh
new ImprovedMergeSort(), $20s]ywS
new HeapSort() ~-<:+9m
}; EY$?^iS
DY.58IHg1
public static String toString(int algorithm){ s#P:6]Ar
return name[algorithm-1]; sUciFAb
} 'hIU_
tT-=hDw
public static void sort(int[] data, int algorithm) { L[]BzsIv
impl[algorithm-1].sort(data); -_|]N/v\
} zo44^=~%
hVf^
public static interface Sort { ERC<Dd0
public void sort(int[] data); )E-E0Hl>7
} YxyG\J\|,
ANb"oX c
public static void swap(int[] data, int i, int j) { N9`97;.X
int temp = data; a.,i.2
data = data[j]; G=cNzr9
data[j] = temp; OoM_q/oI
} c[:Wf<%|
} t:T?7-XIE