[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; CX; m8
} &3itBQF
int i1=l; a%QgL&_5
int i2=mid+1; Bp4#"y2
for(int cur=l;cur<=r;cur++){ lk=[Xo
if(i1==mid+1) di<g"8
data[cur]=temp[i2++]; s~c cx"HH
else if(i2>r) pi/&WMZ<
data[cur]=temp[i1++]; uX6rCokr
else if(temp[i1] data[cur]=temp[i1++]; dki3(
else )"63g
data[cur]=temp[i2++]; j#YVv c%
} gyU=v{].
} OUN"'p%%
Dj3,SJ*x
} 7_eV.'h
Qz$Wp*
改进后的归并排序: :zpT Gk8Z
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package org.rut.util.algorithm.support; Z5`V\$
c]|Tg9AW
import org.rut.util.algorithm.SortUtil; QHtN_Q_F
FR\r/+n:t0
/** yP34h*0B
* @author treeroot lGJ&\Lv:
* @since 2006-2-2 <Rz[G+0S=
* @version 1.0 \\Z?v,XsS
*/ ?gjkgCbC#
public class ImprovedMergeSort implements SortUtil.Sort { @}'?o_/C
^C}f|{J
private static final int THRESHOLD = 10; 8SCXA9}
bKh}Y`
/* !HXyvyDN
* (non-Javadoc) e'fo^XQn[
* F'ez{B\AX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vJ;0%;eu[!
*/ Ia:M+20n
public void sort(int[] data) { q~{O^,4S
int[] temp=new int[data.length]; "M,Hm!j
mergeSort(data,temp,0,data.length-1); Ctk1\quz
} B~ j3!?
{H 3wL
private void mergeSort(int[] data, int[] temp, int l, int r) { i\* b<V
int i, j, k; !)`m mr
int mid = (l + r) / 2; >B.KI}dE
if (l == r) eXkpU7w;
return; ~Yre(8+M
if ((mid - l) >= THRESHOLD) ^ JU#_
mergeSort(data, temp, l, mid); UUvR>5@n
else ^Jc|d,u;s
insertSort(data, l, mid - l + 1); .8wF> 8
if ((r - mid) > THRESHOLD) mlz|KI~\F;
mergeSort(data, temp, mid + 1, r); ]v_u2f'
else .pblI
insertSort(data, mid + 1, r - mid); hS^8/]E={
_iu^VK,}
for (i = l; i <= mid; i++) { ~^o YPd52*
temp = data; $wk(4W8E
} ) gxN'z
for (j = 1; j <= r - mid; j++) { 1.nYT*
temp[r - j + 1] = data[j + mid]; ;20sh^~
} [6nN]U~Y
int a = temp[l]; z%$M IC
int b = temp[r]; ~le:4qaX
for (i = l, j = r, k = l; k <= r; k++) { 6L-3cxqf\
if (a < b) { ^KQZ;[B
data[k] = temp[i++]; F*y7 4j,
a = temp; :]8!G- Z
} else { Q6CVMYT
data[k] = temp[j--]; = @ 1{LF;
b = temp[j]; |8akp
} &E-q(3-
} eX'V#K#C
} Qgq VbJP"
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/** W'v o?
* @param data RZ?abE8
* @param l /WIH#M
* @param i ~@"H\):/
*/ 1CS\1[E
private void insertSort(int[] data, int start, int len) { zTw<9Nf
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 26=G%F6
} QF$s([
} IJLuu@kRm,
} UDlM?r:f
} s=<65
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堆排序： yxi*4R
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package org.rut.util.algorithm.support; -.5R.~@
j$P`/-N
import org.rut.util.algorithm.SortUtil; 7H?lR~w
XM`&/)
/** , Q)
* @author treeroot <ti,Wn.
* @since 2006-2-2 }eSrJgF4M
* @version 1.0 CxrsP.
*/ yL23Nqe
public class HeapSort implements SortUtil.Sort{ E=ObfN"ge
Q3[nS(#Z/=
/* (non-Javadoc) oKPG0iM:
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RAA,%rRhu(
*/ _lfS"ae
public void sort(int[] data) { 5 axt\
MaxHeap h=new MaxHeap(); 'N\nJz}
h.init(data); O]t)`+%q
for(int i=0;i h.remove(); y]uBVn'u
System.arraycopy(h.queue,1,data,0,data.length); [f]:hJi
} 88l{M[B2
"J2v8c
private static class MaxHeap{ MTn}]blH
Mz;KXP
void init(int[] data){ Eg1|Kg\&
this.queue=new int[data.length+1]; S"@@BQ#mf
for(int i=0;i queue[++size]=data; 07>D G#
fixUp(size); zRB LkrC
} S~^]ib0
} H5be5
<WL] (-9I:
private int size=0; A9z3SJ\vXl
B+2.:Zn6
private int[] queue; -'Z-8
z h%b<
public int get() { ?&POVf>
return queue[1]; h3Nbgxa.
} J!yK/*sO,
@QDpw1;V'
public void remove() { j+2-Xy'
SortUtil.swap(queue,1,size--); jgBJs^JgYG
fixDown(1); |oR#j `
} Iv?1XI=
file://fixdown }+F@A`Bm&
private void fixDown(int k) { \<\147&)r
int j; #_zj5B38E
while ((j = k << 1) <= size) { )9+H[
if (j < size %26amp;%26amp; queue[j] j++; vyT-!mC
if (queue[k]>queue[j]) file://不用交换 bs)Ro/7}
break; 9/O\769"'
SortUtil.swap(queue,j,k); M+7jJ?n
k = j; Cm-dos
} @`HW0Y_:
} *\^(-p~M
private void fixUp(int k) { !iUT Re
while (k > 1) { 5E2T*EXSh
int j = k >> 1; vH6.;j'^
if (queue[j]>queue[k]) yg"FF:^T
break; %%lJyLq'Vk
SortUtil.swap(queue,j,k); 3&B- w
k = j; cq8JpSB(
} ePTxuCf>
} m4G))||9Q
"4.A@XsY
} I1JF2"{c
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} hdYd2 j
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SortUtil： _:!7M^IU
~P"o_b6,k
package org.rut.util.algorithm; c>wne\(5H
`|4k>5k
import org.rut.util.algorithm.support.BubbleSort; n{"a0O
import org.rut.util.algorithm.support.HeapSort; RHmT$^=
import org.rut.util.algorithm.support.ImprovedMergeSort; `?SLp
import org.rut.util.algorithm.support.ImprovedQuickSort; K/8TwB?I
import org.rut.util.algorithm.support.InsertSort; )%HIC@MM6
import org.rut.util.algorithm.support.MergeSort; E*QLw*H
import org.rut.util.algorithm.support.QuickSort; 'v5q/l
import org.rut.util.algorithm.support.SelectionSort; l_P90zm39!
import org.rut.util.algorithm.support.ShellSort; lOHW9Z
rf]x5%ij
/** 0*6Q8`I
* @author treeroot H"wIa8A
* @since 2006-2-2 C9eisUM
* @version 1.0 Kr+#)S
*/ 5X:3'*
public class SortUtil { /b410NP5
public final static int INSERT = 1; ."ytBF
public final static int BUBBLE = 2; kT:?1w'
public final static int SELECTION = 3; j k&\{
public final static int SHELL = 4; [ZS.6{vr
public final static int QUICK = 5; jwheJG
public final static int IMPROVED_QUICK = 6; Y.%Vvg4z3
public final static int MERGE = 7; \og2\Oh&gH
public final static int IMPROVED_MERGE = 8; =D)ADZ\<r
public final static int HEAP = 9; 'Qg.D88
T[2<_nn=
public static void sort(int[] data) { d"thM
sort(data, IMPROVED_QUICK); $}=r45e0K
} xp*d:
private static String[] name={ )*aAkM
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ~w}=Oby'y
}; Q<(aU{
2%)~E50U
private static Sort[] impl=new Sort[]{ m",G;VN
new InsertSort(), 6xu%M&ht
new BubbleSort(), f,ql8q(|J
new SelectionSort(), lHE+o;-
new ShellSort(), @@=,bO
new QuickSort(), bb$1zSA
new ImprovedQuickSort(), Is9.A_0h
new MergeSort(), $9Gra#
new ImprovedMergeSort(), Bk5ft4v-
new HeapSort() ,Bj]j -\Y
}; ,C|aiSh0-
T#HF!GH]
public static String toString(int algorithm){ TV}=$\D
return name[algorithm-1]; ?<^^.Si
} He&A>bA)z
kH=qJ3Z
public static void sort(int[] data, int algorithm) { boZ/*+t
impl[algorithm-1].sort(data); &LQfs4}a,
} |I3&a=,
5Hs!s+
public static interface Sort { v+CW([zAx#
public void sort(int[] data); &?k`rF9
} -o57"r^x
<80M$a g
public static void swap(int[] data, int i, int j) { Pt'=_^Io
int temp = data; }MtORqK
data = data[j]; ^tVIPH.R
data[j] = temp; lE3&8~2
} 2 S2;LB
} ;XXEvRk