[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; V&R$8tpz
} GmAj</~
int i1=l; K plM['uF
int i2=mid+1; JaFUcpZk$
for(int cur=l;cur<=r;cur++){ eQ\jZ0s;p
if(i1==mid+1) 2/EK`S
data[cur]=temp[i2++]; ,{+6$h3
else if(i2>r) ?rQc<;b
data[cur]=temp[i1++]; Q)T+r~#2B
else if(temp[i1] data[cur]=temp[i1++]; /yp/9r@T0
else {wv&t R;
data[cur]=temp[i2++]; }1F6?do3&
} &M=3{[
} EIPnm%{1
c"qPTjY
} w49{-Pp[
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改进后的归并排序: \kyM}5G(<0
Vpw[B.v
package org.rut.util.algorithm.support; 5Edo%Hd6
C/y(E|zC$
import org.rut.util.algorithm.SortUtil; zU b8NOi
hMWo\qM
/** ?DRR+n _
* @author treeroot X?R |x[
* @since 2006-2-2 :t%)5:@A
* @version 1.0 dEG ]riO
*/ Fn> <q:
public class ImprovedMergeSort implements SortUtil.Sort { Uh%6LPg^
]'e AO
private static final int THRESHOLD = 10; KD=bkZ&
iU XM(]
/* >+SZd7p
* (non-Javadoc) 9 R
* aH
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) kJ__:rS(T_
*/ hm6pxFkX_
public void sort(int[] data) { 'mUI-1GkT
int[] temp=new int[data.length]; 4@mso+tk
mergeSort(data,temp,0,data.length-1); /L$NE$D} "
} r*]uR /Z$
? osfL
private void mergeSort(int[] data, int[] temp, int l, int r) { q^%5HeV 2
int i, j, k; =oPng=:
int mid = (l + r) / 2; q#|r
if (l == r) +NT:<(;|i5
return; fQ1 0O(`g,
if ((mid - l) >= THRESHOLD) Qi"'bWX@
mergeSort(data, temp, l, mid); 9':/Sab:7v
else oAaf)?8
insertSort(data, l, mid - l + 1); ^9s"FdB]24
if ((r - mid) > THRESHOLD) P|8e%P
mergeSort(data, temp, mid + 1, r); /0l-mfRr
else ^H-QYuz:T0
insertSort(data, mid + 1, r - mid); Qj:{p5H'
.X^43 q
for (i = l; i <= mid; i++) { 9j2\y=<&
temp = data; _\!0t
} '(XW$D
for (j = 1; j <= r - mid; j++) { 4Lw'v:(
temp[r - j + 1] = data[j + mid]; x.o3iN[=
} C6CGj8G
int a = temp[l]; }`#Bf
int b = temp[r]; t+J)dr
for (i = l, j = r, k = l; k <= r; k++) { zG<0CZQ8
if (a < b) { "!^c
data[k] = temp[i++]; 'cYQ?;
a = temp; ze ?CoDx2
} else { tbY SK
data[k] = temp[j--]; =:;YTie
b = temp[j]; h>.9RX &
} pb6 Q?QG,
} &%}bRPUl
} wCC-Y kA
7Y)s#FJ
/** y6\ [1nZ
* @param data {aT92-D3
* @param l jKYm/}d
* @param i BjN{@aEO
*/ 6Z$b?A3zM
private void insertSort(int[] data, int start, int len) { V.U|OQouT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); rrYp'L
} GgT=t)}wu
} }~V,_Fv
} Xa>}4j.
} |fx#KNPf]
f7S^yA[[
堆排序： L+uOBW_
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package org.rut.util.algorithm.support; 5vYsA1Z
3/:LYvM<
import org.rut.util.algorithm.SortUtil; >d'EInSF
qq/_yt
/** ]gEu.Nth`
* @author treeroot ipfm'aQ
* @since 2006-2-2 T4l-sJ'|
* @version 1.0 k-io$
*/ yB|]LYh
public class HeapSort implements SortUtil.Sort{ +A&EKk%$ |
P&h/IBA_
/* (non-Javadoc) MwN1]d|6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) HK^a:BI
*/ <nf=SRZ
public void sort(int[] data) { ~>4@;
MaxHeap h=new MaxHeap(); t&8<k+m
h.init(data); G[vUOEU~O
for(int i=0;i h.remove(); a pKa4nI
System.arraycopy(h.queue,1,data,0,data.length); g<0w/n!jmC
} Ja^7$WY
!'Gb$l!
private static class MaxHeap{ ZWov_
^Kb9@lz/
void init(int[] data){ _T_PX$B
this.queue=new int[data.length+1]; )H.ubM1
for(int i=0;i queue[++size]=data; C:WtCAm(
fixUp(size); >aX:gN
} 3KDu!w@
} >t2]Ssi(
{6-;P#Q0_
private int size=0; |+>%o.M&i
m9v"v:Pw
private int[] queue; dCW0^k
{K<~ vj;
public int get() { Hf!9`R[
return queue[1]; b,=,px
} iXt4|0
xU#]w6
public void remove() { z<FV1niE
SortUtil.swap(queue,1,size--); /QV [N
fixDown(1); ~+7ad$
} *Pa2bY3:
file://fixdown &n}8Uw0440
private void fixDown(int k) { vcaBL<io
int j; {yGZc3e1j
while ((j = k << 1) <= size) { Kc%tnVyGh:
if (j < size %26amp;%26amp; queue[j] j++; 0G+L1a-
if (queue[k]>queue[j]) file://不用交换 v+|@}9|Z
break; |`N$>9qN
SortUtil.swap(queue,j,k); ?v0A/68s#
k = j; XfD z #
} p_D on3
} Y8x(#qp,
private void fixUp(int k) { hWl""66+5
while (k > 1) { K7)j
int j = k >> 1; ,Zf :R
if (queue[j]>queue[k]) Y*]l|)a6_]
break; ~e,f)?
SortUtil.swap(queue,j,k); >DSNKU+j
k = j; ~gSF@tz@
} MYur3lj%_
} FKDamHL<
buMiJzU
} C5.\;;7^&
Q1P,=T@
} $8<j5%/ $M
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SortUtil： zav*
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package org.rut.util.algorithm; z226yNlS
>$#*`6R
import org.rut.util.algorithm.support.BubbleSort; M6@'9E]|>
import org.rut.util.algorithm.support.HeapSort; ~(Ih~/5\^
import org.rut.util.algorithm.support.ImprovedMergeSort; yVu^ >
import org.rut.util.algorithm.support.ImprovedQuickSort; LAu+{'O\
import org.rut.util.algorithm.support.InsertSort; 0KWy?6 X
import org.rut.util.algorithm.support.MergeSort; ~v{C6)
import org.rut.util.algorithm.support.QuickSort; ?qq!%4mTB
import org.rut.util.algorithm.support.SelectionSort; gxBl1
import org.rut.util.algorithm.support.ShellSort; o|b[(t$;O
"@UU[o
/** (ffOu#RQ3
* @author treeroot 9RCB$Ka6X
* @since 2006-2-2 i'eYmm96Q
* @version 1.0 . }-@;:yh
*/ M]%!n3Fb
public class SortUtil { PVQ#>_~5
public final static int INSERT = 1; |j.KFu845
public final static int BUBBLE = 2; 0+VncL)u
public final static int SELECTION = 3; 1@1+4P0NF[
public final static int SHELL = 4; U|y;b+n`
public final static int QUICK = 5; 3:02`;3
public final static int IMPROVED_QUICK = 6; 6T} CPDRq
public final static int MERGE = 7; ;%b <uV
public final static int IMPROVED_MERGE = 8; -.+KCt G$+
public final static int HEAP = 9; Y]`lEq%
N9>'/jgZX
public static void sort(int[] data) { Jq$6$A,f
sort(data, IMPROVED_QUICK); softfjl&l
} '.}6]l
private static String[] name={ @xW"rX#7f
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {Q#Fen ;y|
}; iuH8g
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private static Sort[] impl=new Sort[]{ 7~%
new InsertSort(), Uy_}@50"l
new BubbleSort(), LB64W ;#h
new SelectionSort(), W?4&lC^G
new ShellSort(), V5(tf'
new QuickSort(), 5~kW-x
new ImprovedQuickSort(), cx1WGbZ
new MergeSort(), jl 30\M7
new ImprovedMergeSort(), sJjl)Qs)T
new HeapSort() ECE{xoc
}; mPw56>
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public static String toString(int algorithm){ 8h@)9Q]d\
return name[algorithm-1]; l/y Kc8^<
} 4%#V^??E
9$4/frd
public static void sort(int[] data, int algorithm) { ;s!ns N
impl[algorithm-1].sort(data); TGt1d
} #:Sy`G6!?
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public static interface Sort { L(!!7B_,
public void sort(int[] data); NdXy%Q
} kp<}
yEw"8u'
public static void swap(int[] data, int i, int j) { Wj f>:\w
int temp = data; 4Q`=t&u
data = data[j]; V.P5v{
data[j] = temp; R>YMGUH~w
} f@xfb ie!
} JK^B+.