[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; J]mG!#9
} E]@$,)nC
int i1=l; ,76xa%k(U|
int i2=mid+1; 4{zz-4=
for(int cur=l;cur<=r;cur++){ 9Su4nt`i
if(i1==mid+1) 'aV/\a:*
data[cur]=temp[i2++]; [T}Lq~
else if(i2>r) d1]1bN4`"0
data[cur]=temp[i1++]; .R";2f3
else if(temp[i1] data[cur]=temp[i1++]; }.DE521u
else M_BG:P5
data[cur]=temp[i2++]; 'GyO
} 3:]c>GPQ
} oeKVcVP|'&
.Tm m
} :)*+aS"
s^\ *jZ6
改进后的归并排序: %:S4OT8]
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package org.rut.util.algorithm.support; iY[+BI:
o(L8 -F
import org.rut.util.algorithm.SortUtil; #Ch*a.tI@
w!kWG,{C
/** [C-4*qOaa2
* @author treeroot j0wpaIp
* @since 2006-2-2 ybY[2g2QJ
* @version 1.0 9\ulS2d
*/ Q\moR^>
public class ImprovedMergeSort implements SortUtil.Sort { iZ( U]
hj4mbL
private static final int THRESHOLD = 10; "ZYdJHM
p[^a4E_v
/* UFSbu5 j
* (non-Javadoc) I%<LLkQ
* |PNPOj0
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) yQz6K6p
*/ fw3P?_4;*
public void sort(int[] data) { 7TU(~]Z
int[] temp=new int[data.length]; Abc%VRsT
mergeSort(data,temp,0,data.length-1); )W,.xP
} x>!bvZ2
;R[w}#Sm
private void mergeSort(int[] data, int[] temp, int l, int r) { E#zLm
int i, j, k; I<+i87=
int mid = (l + r) / 2; q]2t3aY%
if (l == r) ;@<Rh^g]
return; kMx^L;:n
if ((mid - l) >= THRESHOLD) H.)Y*zK0.
mergeSort(data, temp, l, mid); SNOML7pd
else dJ(<zz+;b
insertSort(data, l, mid - l + 1); -]. a0
if ((r - mid) > THRESHOLD) $<da<}b
mergeSort(data, temp, mid + 1, r); /UG]hJ-wn
else ,_M
insertSort(data, mid + 1, r - mid); w!|jL $5L
J?%ecCN
for (i = l; i <= mid; i++) { H3>49;`
temp = data; S Rb-eDk'
} $)#?4v<
for (j = 1; j <= r - mid; j++) { d=C&b]
temp[r - j + 1] = data[j + mid]; 1smKU9B2)
} #ZyY(S1.
int a = temp[l]; $W;f9k@C!
int b = temp[r]; !nDiAjj
for (i = l, j = r, k = l; k <= r; k++) { w| eVl{~p
if (a < b) { )}$]~ f4R
data[k] = temp[i++]; I~F]e|Ehqr
a = temp; XGb*LY+Db6
} else { -!QVM\t
data[k] = temp[j--]; QAzwNXE+
b = temp[j]; (91 YHhk{
} rrP_7D
} zQ#2BOx1
} u?rs6A[h#
0[ZB^
/** ^AF~k#R
* @param data Oy_%U*
* @param l s4`,Z*H
* @param i *cP(3n3]R
*/ ?mHu eX
private void insertSort(int[] data, int start, int len) { WX* uhR
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *. 1S
} x~QZVL=:
} 4MrUo9L$s
} #.{ddY{
} &!F"3bD0
-Q6Vz=ku
堆排序： &Jd_@F#J
~"VM_Lz]5
package org.rut.util.algorithm.support; 9]vy#a#
f^)iv ]p
import org.rut.util.algorithm.SortUtil; M#k$[w}=
;}H*|"z;!
/** @E4ya$A)F
* @author treeroot uD\rmO{
* @since 2006-2-2 9-Z?
* @version 1.0 wb>"'%
*/ 26}fB
public class HeapSort implements SortUtil.Sort{ @JPz|
D63?f\
/* (non-Javadoc) ~^PNMZk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \]0#jI/:
*/ E|A~T7G=
public void sort(int[] data) { GX=U6n>
MaxHeap h=new MaxHeap(); 3^iVDbAW{
h.init(data); _*cKu>,O
for(int i=0;i h.remove(); s"5nfl
System.arraycopy(h.queue,1,data,0,data.length); #^tnRfS"
} 2sj: &][R
|\xTcS|d
private static class MaxHeap{ ?{P$|:ha
7x]q>Y8T
void init(int[] data){ m@']%X*(,
this.queue=new int[data.length+1]; L|nFN}da
for(int i=0;i queue[++size]=data; a ?\:,5=
fixUp(size); TR%8O;
} C`-CfZZ
} X|yVRQ?F`
"ZL_
private int size=0; Gx*B(t]4y
9 e|[9
private int[] queue; x`Wb9[u8
!DUOi4I
public int get() { `(/xj{"Fr}
return queue[1]; RXo6y(^
} @yj~5Gf(j
4];>O
public void remove() { d)0|Q
SortUtil.swap(queue,1,size--); OdOn wY
fixDown(1); D< kf/hj
} ,g4T>7`&U%
file://fixdown Dk&(QajL
private void fixDown(int k) { I Bko"|e@
int j; <9\Lv]ng
while ((j = k << 1) <= size) { I2-ue 63 ?
if (j < size %26amp;%26amp; queue[j] j++; C$$Zwgy
if (queue[k]>queue[j]) file://不用交换 `sA xk
break; Hy -)yR
SortUtil.swap(queue,j,k); ;mg.} fI
k = j; M`7[hr
} #K*p1}rf
} =$%-RX7
private void fixUp(int k) { A-d<[@d0
while (k > 1) { G$luGxl[
int j = k >> 1; wn|;Li
if (queue[j]>queue[k]) k!G{#(++&6
break; FS!9 j8
SortUtil.swap(queue,j,k); 4"\x#
k = j; @$Yk#N;&(
} {:=W) 37U
} ]1eZ<le`6
_ nz^+
} 7HQL^Q
6,|>;,U7
} rCsC}2O
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SortUtil： =T#hd7O`V
l>L?T#v!_
package org.rut.util.algorithm; s];0-65)
>DbG )0|
import org.rut.util.algorithm.support.BubbleSort; _zzT[}
import org.rut.util.algorithm.support.HeapSort; kM@e_YtpY
import org.rut.util.algorithm.support.ImprovedMergeSort; .JTRFk{W
import org.rut.util.algorithm.support.ImprovedQuickSort; c}|} o^
import org.rut.util.algorithm.support.InsertSort; 4^k8|#c
import org.rut.util.algorithm.support.MergeSort; /reGT!u
import org.rut.util.algorithm.support.QuickSort; Q@8(e&{#W
import org.rut.util.algorithm.support.SelectionSort; TXT<6(
import org.rut.util.algorithm.support.ShellSort; LN5BU,4=
UtC<TBr
/** Q[%G`;e#
* @author treeroot MiKq|
* @since 2006-2-2 f:y:: z
* @version 1.0 Z0O0Q=e\Y
*/ MRZN4<}9
public class SortUtil { WvoIh4]
public final static int INSERT = 1; s<Nw)Ynw
public final static int BUBBLE = 2; NH:Bdl3
public final static int SELECTION = 3; {.0I!oWv
public final static int SHELL = 4; 0v6Z4Ahpo
public final static int QUICK = 5; osmCwM4O
public final static int IMPROVED_QUICK = 6; /VP #J<6L
public final static int MERGE = 7; T+t7/PwC;
public final static int IMPROVED_MERGE = 8; L?P[{Ohh/
public final static int HEAP = 9; PMX'vA`
@MoCEtt
public static void sort(int[] data) { keKsLrd
sort(data, IMPROVED_QUICK); ;Xqi;EA
} 6' \M:'<0e
private static String[] name={ K6)IBV;
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @3 +
}; EZVgTySd
^^24a_+2
private static Sort[] impl=new Sort[]{ ^vv1cft
new InsertSort(), E7.{SGH}
new BubbleSort(), Im};wJ&
new SelectionSort(), C OL"/3r
new ShellSort(), Jk:ZO|'Z
new QuickSort(), &B1!,joH~
new ImprovedQuickSort(), :/Z1$xS
new MergeSort(), {w,<igh
new ImprovedMergeSort(), <VQ@I
new HeapSort() (KfQ'B+
}; xF YHv@g
|5q,%9_
public static String toString(int algorithm){ J-azBi
return name[algorithm-1]; ^JY:$)4["
} .b!HEi<F
ti]8_vP}*
public static void sort(int[] data, int algorithm) { teLZplC=f
impl[algorithm-1].sort(data); {K|ds($ 5
} >MhZ(&iD
q1 BpE8
public static interface Sort { _{}^]ZB
public void sort(int[] data); MCIuP`sC|
} sYSq>M
Jvj* z6/a
public static void swap(int[] data, int i, int j) { Cv&>:k0V
int temp = data; 9KT85t1#
data = data[j]; )(1tDQ`L>
data[j] = temp; n$>_2v
} "]=XB0)
} EiDpy#f}