[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; tF*szf|$-
} QT! 4[,4
int i1=l; A4.4Dji,x
int i2=mid+1; *O,H5lwU
for(int cur=l;cur<=r;cur++){ {:Aw_z:'
if(i1==mid+1) ;}qhc l+
data[cur]=temp[i2++]; `lO(s%HC
else if(i2>r) }Ov ^GYnn
data[cur]=temp[i1++]; >-.e AvD
else if(temp[i1] data[cur]=temp[i1++]; !v|FT. T`
else fH\X
data[cur]=temp[i2++]; fmfTSN(Q~`
} VIC0}LT0R
} Z&Y=`GOI
K*q[(,9
} .Da'pOe
Rx7X_A}
改进后的归并排序: V8WFQdXc
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package org.rut.util.algorithm.support; )[L^Dmd,
).5RPAP
import org.rut.util.algorithm.SortUtil; Df4+^B,1
5!I4l1
/** Q8D&tJg
* @author treeroot 8'Z:ydj^,
* @since 2006-2-2 a2w T6jY
* @version 1.0 Ml?~ |_
*/ j'?7D0>
public class ImprovedMergeSort implements SortUtil.Sort { YAVy9$N-
W=JAq%yd<
private static final int THRESHOLD = 10; !8 -oR6/$%
4jNG^@O
/* =PkO!Mm8
* (non-Javadoc) POAw M
* H#i{?RM@l
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !}f1`/
*/ )w h%|
public void sort(int[] data) { |&3x#1A
int[] temp=new int[data.length]; P`$!@T0=
mergeSort(data,temp,0,data.length-1); JhHWu<
} 7 <9yH:1
{2&m`Dbm
private void mergeSort(int[] data, int[] temp, int l, int r) { fB1TFtAh
int i, j, k; $P z`$~
int mid = (l + r) / 2; ,CvG 20>
if (l == r) `'I{U5;e
return; j}1zdA
if ((mid - l) >= THRESHOLD) mYxyWB
mergeSort(data, temp, l, mid); "{D6J809
else |4(~%| 8{
insertSort(data, l, mid - l + 1); NTo!'p:s
if ((r - mid) > THRESHOLD) vb Y3;+M>
mergeSort(data, temp, mid + 1, r); 6e,xDr
else .IarkeCtb
insertSort(data, mid + 1, r - mid); 7O5`v(<9n>
5U`ZbG
for (i = l; i <= mid; i++) { oF]cTAqhC.
temp = data; |re}6#TgcT
} `B/0iA
for (j = 1; j <= r - mid; j++) { i;/xK=L
temp[r - j + 1] = data[j + mid]; g.py+ ZFJ
} [XVEBA4GI
int a = temp[l]; QaIjLc~W
int b = temp[r]; Fd]\txOXj
for (i = l, j = r, k = l; k <= r; k++) { oA] KE"T
if (a < b) { $ _j[2EU
data[k] = temp[i++]; h4|i%,f
a = temp; ]z/Zq
} else { x5}'7,A
data[k] = temp[j--]; \Ig68dFf%
b = temp[j]; #:jb*d?
} {\H/y c|@
} 1CU>L[W)
} ~{hxR)x9
gTl<wo +
/** az0<5Bq)
* @param data fyTAou6hI
* @param l ,DdB^Ig<r
* @param i E`int?C!
*/ W>_]dPBS/
private void insertSort(int[] data, int start, int len) { ?eH&'m}-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); "@R>J?Cc+
} )J]9 lW&y
} 2H71~~ c
} N`iwC!
} [x=jH>Y
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堆排序： 8Jf.ECQT
U,#yqER'r
package org.rut.util.algorithm.support; > fnh+M
CTX9zrY*T
import org.rut.util.algorithm.SortUtil; |-sPLU&s%
F+R?a+e
/** S/|,u`g-
* @author treeroot :B3[:MpL}
* @since 2006-2-2 j',W 64
* @version 1.0 v+p{|X-
*/ d->|EJP
public class HeapSort implements SortUtil.Sort{ XO#/Fv!
rX_@Ihv'
/* (non-Javadoc) X%z }VA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +$4(zPs@
*/ dS^T$sz.co
public void sort(int[] data) { Vk< LJ S
MaxHeap h=new MaxHeap(); |*Z$E$k:
h.init(data); Lg8nj< TF
for(int i=0;i h.remove(); zp\8_U@
System.arraycopy(h.queue,1,data,0,data.length); #/PAA
} afjtn_IB
!.2<| 24
private static class MaxHeap{ 8.F~k~srA
*6HTV0jv
void init(int[] data){ COH<Tj
this.queue=new int[data.length+1]; J>fQNW!{
for(int i=0;i queue[++size]=data; mF` B#
fixUp(size); UOQEk22
} c/c$D;T
} }Zl&]e
21k5I #U
private int size=0; NM ]bgpP
YK|bXSA[
private int[] queue; *JggU
8DP+W$
public int get() { %$%&m1Y
return queue[1]; {U&.D [{&
} vJAZ%aW
!9 fz(9
public void remove() { Gt9&)/#
SortUtil.swap(queue,1,size--); o7IxJCL=Q
fixDown(1); *~w[eH!!
} ]HpA5q1ck
file://fixdown ~?B;!Csk
private void fixDown(int k) { 'SQG>F Uy
int j; nUkaz*4qU
while ((j = k << 1) <= size) { f~}H
if (j < size %26amp;%26amp; queue[j] j++; !i=nSqW
if (queue[k]>queue[j]) file://不用交换 9UvXC)R1
break; ^CwR!I.D}4
SortUtil.swap(queue,j,k); [+qCs7'
k = j; v[Kxja;
} C8F7bG8c
} }fp-5
private void fixUp(int k) { 3fN.bU9_
while (k > 1) { Z7 E
int j = k >> 1; yf&7P;A
if (queue[j]>queue[k]) <&)v~-&O
break; @&[T _l
SortUtil.swap(queue,j,k); Y@PI {;!
k = j; /x3/Ubmz~x
} l<M'=-Y
} bH"hX
{BKl`1z
} \QmCeB
IIy~[4dW
} ~'R(2[L!;
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SortUtil： McPNB`.H
:;t #\%L/
package org.rut.util.algorithm; uc|45Zxt
xe/(
import org.rut.util.algorithm.support.BubbleSort; *L!!]Q2c
import org.rut.util.algorithm.support.HeapSort; MDF%\Sx
import org.rut.util.algorithm.support.ImprovedMergeSort; g2unV[()_
import org.rut.util.algorithm.support.ImprovedQuickSort; =J1rlnaaEL
import org.rut.util.algorithm.support.InsertSort; #-h\.#s
import org.rut.util.algorithm.support.MergeSort; c'*a{CV4P
import org.rut.util.algorithm.support.QuickSort; Rp$}YN
import org.rut.util.algorithm.support.SelectionSort; mFHH515
import org.rut.util.algorithm.support.ShellSort; np~~mdmRK
PTj&3`v
/** 2)j0Ai%
* @author treeroot ~F1:N>>_Cf
* @since 2006-2-2 j(~ *'&|(
* @version 1.0 dDnf^7q/
*/ [TNj;o5J
public class SortUtil { s: 3z'4oX
public final static int INSERT = 1; 6m6zA/
public final static int BUBBLE = 2; <8,cuX\
public final static int SELECTION = 3; ne^imht
public final static int SHELL = 4; a')|1DnR
public final static int QUICK = 5; ^B+!N;
public final static int IMPROVED_QUICK = 6; !+:ov'F
public final static int MERGE = 7; }x&N^Ky3c
public final static int IMPROVED_MERGE = 8; Un6/e/6,
public final static int HEAP = 9; [d* ~@P
_v* nlc
public static void sort(int[] data) { j) ,,"54*
sort(data, IMPROVED_QUICK); 8/K!SpM*d
} *28pRvY:b
private static String[] name={ `_&Vt=7lG
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" RxQh2<?
}; $y b4xU
X6^},C'E.:
private static Sort[] impl=new Sort[]{ `SVmQSwO[
new InsertSort(), `)QCn<
new BubbleSort(), R6=$u{D
new SelectionSort(), ,\v91Rp~?
new ShellSort(), &7_Qd4=08w
new QuickSort(), Ja ,Cvt
new ImprovedQuickSort(), k^OV56
new MergeSort(), +}-@@,
new ImprovedMergeSort(), Zy_V9j[n
new HeapSort() M?;y\vS?.
}; }6 K^`!
~@kU3ZGJZ
public static String toString(int algorithm){ oHs2L-G
return name[algorithm-1]; .$#rV?7
} ,k G>?4
G}9=)
public static void sort(int[] data, int algorithm) { n#iwb0-
impl[algorithm-1].sort(data); 1 `KN]Nt
} D0BI5q
5y?-fT]X
public static interface Sort { &hk-1y9QS
public void sort(int[] data); [}fv dW
} %8~3M75$
Q~Z=(rP20
public static void swap(int[] data, int i, int j) { Vrvic4
int temp = data; 5[Pr|AY
data = data[j]; l{D'uI[&
data[j] = temp; M2U&?V C!
} rLX4jT^
} YTw#JOO