[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; )OqN\
} nL}bCX{
int i1=l; Fj9/@pe1
int i2=mid+1; \/jr0):
for(int cur=l;cur<=r;cur++){ U.oxLbJ`
if(i1==mid+1) JM{S49Lx
data[cur]=temp[i2++]; n:?fv=9n
else if(i2>r) eNlE]W,=
data[cur]=temp[i1++]; H_'i.t 'SS
else if(temp[i1] data[cur]=temp[i1++]; W{Cc wq
else L~1u?-zu
data[cur]=temp[i2++]; 3G9YpA_}X
} lz!F{mR
} a1p:~;f}[
_=Y]ZX`j
} L<>;E
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改进后的归并排序: n4%|F'ma
cL&V2I5O
package org.rut.util.algorithm.support; dtQ>4C"N
/)SwQgK#
import org.rut.util.algorithm.SortUtil; X75>C<
tRYMK+
/** (Q !4\Gy
* @author treeroot 9Ot;R?>(
* @since 2006-2-2 W|@EKE.k
* @version 1.0 0SV#M6`GX
*/ XM3N>OR.
public class ImprovedMergeSort implements SortUtil.Sort { chsjY]b
}cyHR1K
private static final int THRESHOLD = 10; o)KF+[^
)W'l^R4W
/* vV1F|
* (non-Javadoc) bD<[OerG
* 2%N$Y]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3ik
*/ Vb06z3"r
public void sort(int[] data) { \t'(&taX<
int[] temp=new int[data.length]; w!)B\l^+c
mergeSort(data,temp,0,data.length-1); ^~(vP:
} E;~gQ6vAI
<3z]d?u
private void mergeSort(int[] data, int[] temp, int l, int r) { $78fR8|r-
int i, j, k; jcQ{,9 H`l
int mid = (l + r) / 2; s S8Z5k;
if (l == r) km'3[}8o&
return; A!s\;C
if ((mid - l) >= THRESHOLD) sM({u/
mergeSort(data, temp, l, mid); qSj2=dlW
else _*6nTSL
insertSort(data, l, mid - l + 1); r_T\%
if ((r - mid) > THRESHOLD) }% JLwN
mergeSort(data, temp, mid + 1, r); ?"PUw3V3lB
else "aK3 ylz;
insertSort(data, mid + 1, r - mid); 6GG&mqr+
%(Sy XZ
for (i = l; i <= mid; i++) { M(x5D;db/
temp = data; Wm4@+}
} -Ep cX!i
for (j = 1; j <= r - mid; j++) { y5iLFR3z
temp[r - j + 1] = data[j + mid]; OwV>`BIwns
} ex7zg!
int a = temp[l]; l]inG^s
int b = temp[r]; R9D<lX0%
for (i = l, j = r, k = l; k <= r; k++) { ,Cj1S7GFR
if (a < b) { /K2VSj3\
data[k] = temp[i++]; [wP;g'F
a = temp; O^|dc=
} else { ),0_ C\
data[k] = temp[j--]; 8I04Nx
b = temp[j]; oAe]/j$
} ]K0<DO9
} uQWJ7Xm
} vb)Z&V6(
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/** \%=\_"^?
* @param data Ek(. ["
* @param l _Xd,aLoo
* @param i Q.#@xaX'{`
*/ d*Dq=.F(
private void insertSort(int[] data, int start, int len) { Rv ?Go2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); g !w7Yv
} h<\o[n7j
} ?JDZDPVJ)
} aM5zYj`pW
} [t5:4 Iq
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堆排序： !=--pb
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package org.rut.util.algorithm.support; RS!~5nk5
N,V%/O{Y
import org.rut.util.algorithm.SortUtil; ~Y@(
YuSe~~F)j
/** >3s9vdUp4h
* @author treeroot x0@J~ _0
* @since 2006-2-2 +Tc<|-qQn
* @version 1.0 7lY&/-V
*/ #qT97NQ
public class HeapSort implements SortUtil.Sort{ RxU6.5N
z"bgtlfb8
/* (non-Javadoc) ~{iBm"4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) a{^[<
*/ 0vNEl3f'O
public void sort(int[] data) { Xg?hh 0s
MaxHeap h=new MaxHeap(); %/b?T]{
h.init(data); aAiSP+#
for(int i=0;i h.remove(); g*F?
System.arraycopy(h.queue,1,data,0,data.length); } *|_P
} Z*S 9pkWcF
>yFEUD:
private static class MaxHeap{ H|_^T.n?E
WF\ hXO
void init(int[] data){ OE)n4X
this.queue=new int[data.length+1]; Fgq"d7`9@
for(int i=0;i queue[++size]=data; Cc*"cQe
fixUp(size); vRa|lGeW
} 1{@f:~v?
} @IL_
}T=0]u4,
private int size=0; S9kagiFX\
,b;eU[!]
private int[] queue; ERcj$ [:T(
O=E"n*U
public int get() { 9sYN7x
return queue[1]; `s HrC
} ZuZe8&
yZ?|u57
public void remove() { I4'mU$)U
SortUtil.swap(queue,1,size--); N8a+X|3]0
fixDown(1); p6~\U5rXm
} Yw7+wc8R
file://fixdown ^Wb|Pl
private void fixDown(int k) { P.^%8L
int j; f9v%k'T[
while ((j = k << 1) <= size) { ={&}8VA
if (j < size %26amp;%26amp; queue[j] j++; _ dFZR
if (queue[k]>queue[j]) file://不用交换 o&45y&
break; =#)Zm?[;
SortUtil.swap(queue,j,k); t\LAotTF/
k = j; rPaUDR4U
} s))L^|6
} s}Y_og_c
private void fixUp(int k) { 7hAFK
while (k > 1) { y$6m|5
int j = k >> 1; Y@)iPK@z
if (queue[j]>queue[k]) S3cjw9V
break; $dr=M(&
SortUtil.swap(queue,j,k); _T[=7cn
k = j; r{DR$jD
} =4RXNWkud
} py9zDWk~
\ ;.W;!*
} ?6h65GO{
rn1^6qy)
} f{ZOH<"Lo
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SortUtil： L2"fO
c.5?Q>!+
package org.rut.util.algorithm; 6=V&3|"
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import org.rut.util.algorithm.support.BubbleSort; #=)(t${7'
import org.rut.util.algorithm.support.HeapSort; T&.ZeB1
import org.rut.util.algorithm.support.ImprovedMergeSort; u,<#z0R|;$
import org.rut.util.algorithm.support.ImprovedQuickSort; *E"QFirk0
import org.rut.util.algorithm.support.InsertSort; < C54cO
import org.rut.util.algorithm.support.MergeSort; <~:Lp:6 J
import org.rut.util.algorithm.support.QuickSort; sGx"ja+
import org.rut.util.algorithm.support.SelectionSort; 9f ,$JjX[
import org.rut.util.algorithm.support.ShellSort; #:rywz+
BE n$~4-
/** wwnl_9a
* @author treeroot ZA4NVt.yN
* @since 2006-2-2 y,$kU1yH7
* @version 1.0 3QL I|VpO
*/ @4h{#
public class SortUtil { 0!v+ +
public final static int INSERT = 1; }Dk*Hs^E
public final static int BUBBLE = 2; /[f9Z:>V
public final static int SELECTION = 3; _YVp$aKDR
public final static int SHELL = 4; /15e-(Zz/
public final static int QUICK = 5; Ktrqrl^IJ
public final static int IMPROVED_QUICK = 6; [a~|{~?8
public final static int MERGE = 7; r5ONAa3.
public final static int IMPROVED_MERGE = 8; d!0p^!3
public final static int HEAP = 9; lp`raNNo
Hm=!;xAFX
public static void sort(int[] data) { eil"1$k
sort(data, IMPROVED_QUICK); r|rOIAo
} 2BA'Zu`
private static String[] name={ L\L/+yNv:G
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" DgOO\
}; _~m@ SI
R +H0+omj
private static Sort[] impl=new Sort[]{ H.sHXuu
new InsertSort(), ?3ldHWa
new BubbleSort(), W79wz\a
new SelectionSort(), d`>'<
new ShellSort(), 5c?1JH62o8
new QuickSort(), _hgu:
new ImprovedQuickSort(), rwb7>]UI"d
new MergeSort(), s)HLFdis@
new ImprovedMergeSort(), gzS6{570
new HeapSort() fi*@m,-
}; y; LL^:rq
tz#Fy?pe
public static String toString(int algorithm){ L+s3@C;b
return name[algorithm-1]; Ke0j8|
} $)w9EGZ
@J"Gn-f~
public static void sort(int[] data, int algorithm) { ~(Wq 5<v
impl[algorithm-1].sort(data); |X:"AH"S
} N#(p_7M
k+ Shhe1
public static interface Sort { ygiZ~v4P/
public void sort(int[] data); 8G&'ED_&
} '6Lw<#It
0Z.bd=H
public static void swap(int[] data, int i, int j) { no6q3<re
int temp = data; `ceetr=
data = data[j]; _}4l4
data[j] = temp; Yyl(<,Yi
} XxXMtiZ6
} 8|FHr,