[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; *~H\#N|x
} 8IrA{UU
int i1=l; mYRW/8+g
int i2=mid+1; +PfXc?VU
for(int cur=l;cur<=r;cur++){ p;k7\7
if(i1==mid+1) <+iL@'SgF
data[cur]=temp[i2++]; N-cLp}D}WB
else if(i2>r) |y}iOI
data[cur]=temp[i1++]; LRa^x44
else if(temp[i1] data[cur]=temp[i1++]; .*_uXQ
else O>)Fl42IeD
data[cur]=temp[i2++]; p.50BcDg
} ,ag:w<km
} V\4zK$]
` 0}z ;&:
} !`$xN~_
:,]*~Nl
改进后的归并排序: t=B>t S.hO
CQGq}.Jt!
package org.rut.util.algorithm.support; z&x3":@u<
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import org.rut.util.algorithm.SortUtil; @}[yC['
/6@iRswa
/** l*(Ml= O{
* @author treeroot AIK99
* @since 2006-2-2 N# ?}r>W3
* @version 1.0 .{}=!>U2
*/ {P[>B}'rW
public class ImprovedMergeSort implements SortUtil.Sort { D Xjw"^x
ytkV"^1^
private static final int THRESHOLD = 10; ~EJ+<[/
_t'S<jTI
/* KDQqN]rg
* (non-Javadoc) Yfotq9.=+
* <[W41{
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) -<MA\iSP
*/ $MPh\T
public void sort(int[] data) { tITx+i
int[] temp=new int[data.length]; @_ Q
mergeSort(data,temp,0,data.length-1); yR|Beno
} Mb0l*'ZF
:e|[gEA
private void mergeSort(int[] data, int[] temp, int l, int r) { 7F!(60xY
int i, j, k; =mWr8p-H
int mid = (l + r) / 2; 2qQG
if (l == r) n9p_D
return; S(nZ]QEG
if ((mid - l) >= THRESHOLD) +?I1Og
mergeSort(data, temp, l, mid); { t1|6R0
else F!yr};@^p
insertSort(data, l, mid - l + 1); _${//`ia=
if ((r - mid) > THRESHOLD) q5D_bm7,3
mergeSort(data, temp, mid + 1, r); `mt.=d
else njoU0f1`
insertSort(data, mid + 1, r - mid); ) }.<lSw
G{C27k>wa
for (i = l; i <= mid; i++) { %DqPRl.Gu
temp = data; n>|7 k3
} FK~FC:K
for (j = 1; j <= r - mid; j++) { `5$B"p&i
temp[r - j + 1] = data[j + mid]; *RpBKm&^7
} /xseI)y.B
int a = temp[l]; tn@MOOPl
int b = temp[r]; ^qgOgu
for (i = l, j = r, k = l; k <= r; k++) { P}dhpU
if (a < b) { vsDR@Y}k
data[k] = temp[i++]; h0v4!`PQ-
a = temp; XC NM
} else { kl&9M!;:n
data[k] = temp[j--]; <ic%c/mN
b = temp[j]; {y0`p1
} 7 g2@RKo
} 9"%ot=)
} [ S_8;j
T+9#&
/** `EjPy>kM
* @param data _h2s(u >\
* @param l gXzp$#
* @param i :fW\!o8Z2
*/ GLIe8T*ht
private void insertSort(int[] data, int start, int len) { N9s ,..
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 2S`D7R#6s
} -N4km5
} )C0dN>Gb
} `fA|])3T
} D. _*p
iCK p"(kf
堆排序： >AsrPU[
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package org.rut.util.algorithm.support; ,m^@S
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import org.rut.util.algorithm.SortUtil; D-GIrw{>5
bOKgR{i
/** y66V&#`,e0
* @author treeroot Q:/BC= ~
* @since 2006-2-2 TAl#V7PF}
* @version 1.0 <+%#xi/_
*/ b}eBy
public class HeapSort implements SortUtil.Sort{ ?mjQN|D
^/k`URQ
/* (non-Javadoc) v o9Fj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) O_n) 2t(c?
*/ acXB vs
public void sort(int[] data) { No1*~EQ
MaxHeap h=new MaxHeap(); MK*WStY
h.init(data); ^71!.b%
for(int i=0;i h.remove(); /1Q i9uit
System.arraycopy(h.queue,1,data,0,data.length); 4kZ9]5#.
} P%-@AmO^_
)w.\xA~|
private static class MaxHeap{ k~<b~VcU
q!5 *)nw"
void init(int[] data){ !oDX+hd,%>
this.queue=new int[data.length+1]; { 4(E @
for(int i=0;i queue[++size]=data; f-!A4eKe
fixUp(size); $Bd13%>)
} ?uq7K"B
} Wg3\hv29
q')MKR*
private int size=0; 6tKm'`^z4
~jqG
private int[] queue; svBT~P0x
I`O)I&KH
public int get() { ~MOab e
return queue[1]; Rp!R&U/
} e!:/enQo
[^U#ic>cT
public void remove() { %kcyE<c
SortUtil.swap(queue,1,size--); D)u 9Y
fixDown(1); >*5+{~k~4
} RH+'"f
file://fixdown b.<>CG'
private void fixDown(int k) { ns{BU->f
int j; ;T6x$e
while ((j = k << 1) <= size) { pX nY=
if (j < size %26amp;%26amp; queue[j] j++; #DL( %=:
if (queue[k]>queue[j]) file://不用交换 oZY2K3J)
break; 0^27grU>
SortUtil.swap(queue,j,k); Ot]Y/;K
k = j; 2I2#o9(Ar
} j\ dY
} ,s?7EHtC
private void fixUp(int k) { LHt{y3l]
while (k > 1) { z&"-%l.b@}
int j = k >> 1; P[.BK
if (queue[j]>queue[k]) b0~AN#Es
break; _-vf<QO]
SortUtil.swap(queue,j,k); /p=9"?
k = j; !+E|{Zj
} ~}c`r4
} LOD'iiH6
kg>Ymo.
} | Q Y_ci
UHtxzp =[
} \Lz2"JI
Q}?yj,DD
SortUtil： :oH~{EQ
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package org.rut.util.algorithm; "]jGCo>9
Ew4>+o!
import org.rut.util.algorithm.support.BubbleSort; 31w9$H N
import org.rut.util.algorithm.support.HeapSort; NW.<v /?=,
import org.rut.util.algorithm.support.ImprovedMergeSort; cR0RJ$[d
import org.rut.util.algorithm.support.ImprovedQuickSort; S_z}h
import org.rut.util.algorithm.support.InsertSort; UeG$lMV
import org.rut.util.algorithm.support.MergeSort; m]bv2S+5y
import org.rut.util.algorithm.support.QuickSort; WhO;4-q)2
import org.rut.util.algorithm.support.SelectionSort; yAu-BObD
import org.rut.util.algorithm.support.ShellSort; /ry#q%?
k \|[=
/** H$:Z`CQt<
* @author treeroot VtR?/+8X
* @since 2006-2-2 $GzTDq Y9@
* @version 1.0 KPGX/l
*/ `Z3Qx~fx
public class SortUtil { CvCk#:@HM
public final static int INSERT = 1; hrwQh2sm
public final static int BUBBLE = 2; YU89m7cc'
public final static int SELECTION = 3; {[~ !6&2(k
public final static int SHELL = 4; +fgF &.
public final static int QUICK = 5; ^lqcF.
public final static int IMPROVED_QUICK = 6; }`oe<|
public final static int MERGE = 7; [TZlvX(E
public final static int IMPROVED_MERGE = 8; y\'t{>U/
public final static int HEAP = 9; UF[2Rb8?
sckyG
public static void sort(int[] data) { KfU4#2}
sort(data, IMPROVED_QUICK); ^y?7B_%:B#
} vrtK~5K
private static String[] name={ %$b)l?!
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" "t<${
}; @j%r6N
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private static Sort[] impl=new Sort[]{ oKIry 8'^N
new InsertSort(), _}X_^taTZS
new BubbleSort(), 5Rv6+d
new SelectionSort(), s!\uR.
new ShellSort(), Y$%/H"1bk
new QuickSort(), *E<%db C2
new ImprovedQuickSort(), Ni$WI{e9
new MergeSort(), YfC1.8
new ImprovedMergeSort(), P@Wi^svj
new HeapSort() UTEUVcJ\
}; `.z;.&x
rpsq.n
public static String toString(int algorithm){ }]pq&v!
return name[algorithm-1]; "_qH+=_R
} wVvk{tS
$73j*@EQA
public static void sort(int[] data, int algorithm) { v535LwFW
impl[algorithm-1].sort(data); 7qB}Hvh
} }5H3DavW
h1.]Nl C
public static interface Sort { |x|#n
public void sort(int[] data); 0`=#1u8
} '`q&UPg]
L\||#w
public static void swap(int[] data, int i, int j) { P8K{K:T
int temp = data; 0]l _qxv
data = data[j]; kji*7a?y
data[j] = temp; .+<Ul]e/
} 6!} @vp![
} OO@ (lt