[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; s2 :Vm\
} l~DIV$>,Z
int i1=l; ~mi4V
int i2=mid+1; R-1MD
for(int cur=l;cur<=r;cur++){ y%kZ##
if(i1==mid+1) |')PQ
data[cur]=temp[i2++]; LGX+_"
else if(i2>r) P*VZ$bUe5@
data[cur]=temp[i1++]; v+SdjFAY
else if(temp[i1] data[cur]=temp[i1++]; }@tgc?CD
else =_ b/g
data[cur]=temp[i2++]; J1~E*t^
} mo(>SnS<
} #h4FLF_w
BpYxH#4
} 9 Qa_3+.B
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改进后的归并排序: S9r+Nsn
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package org.rut.util.algorithm.support; {>~9?Xwh
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import org.rut.util.algorithm.SortUtil; `+>K)5hrR
J.M&Vj:
/** s;* UP
* @author treeroot -V[x q
* @since 2006-2-2 VfP\)Rl
* @version 1.0 &/"a E
*/ 0(:SEiz6s
public class ImprovedMergeSort implements SortUtil.Sort { zR]!g|;f
vZ.<OD4
private static final int THRESHOLD = 10; < *;GJ{
ftl?x'P%
/* M6Np!0G
* (non-Javadoc) 5$cjCjY
* w-LENdw
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :2,NKdD
*/ \hBzP^*"n
public void sort(int[] data) { ~dpf1fP
int[] temp=new int[data.length]; Qx8(w"k*
mergeSort(data,temp,0,data.length-1); CS(2bj^6D
} 83gWA>Odh
!U1 vW}H
private void mergeSort(int[] data, int[] temp, int l, int r) { 4nh=Dq[
int i, j, k; ka8Y+Gs
int mid = (l + r) / 2; [0]A-#J
if (l == r) 0< vJ*z|_
return; >0<n%V#s:r
if ((mid - l) >= THRESHOLD) ci$J?a
mergeSort(data, temp, l, mid); A8Fe@$<#8
else '@Rk#=85Z
insertSort(data, l, mid - l + 1); LbRQjwc]W
if ((r - mid) > THRESHOLD) )`R}@(r.
mergeSort(data, temp, mid + 1, r); q`IY;"~
else Xo/H+[;X
insertSort(data, mid + 1, r - mid); (tg9"C
$D!/v)3
for (i = l; i <= mid; i++) { GJrmK
temp = data; &0-oi Y
} {5<fvMO!6
for (j = 1; j <= r - mid; j++) { 09jE7g @X}
temp[r - j + 1] = data[j + mid]; 4R\jZ@D
} shH2/.>
int a = temp[l]; 83t/\x,Q
int b = temp[r]; %N fpEo
for (i = l, j = r, k = l; k <= r; k++) { gK({InOP
if (a < b) { }^&f {
data[k] = temp[i++]; m:[I$b6AY
a = temp; =f{v:n6
} else { ID,_0b
data[k] = temp[j--]; igk<]AwxS
b = temp[j]; ^4^N}7>5
} It&CM,=t
} WK(X/!1/k
} ~U"m"zpLP
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/** 1*dN. v:5
* @param data 6Jb0MX"AVr
* @param l (b<0=U
* @param i E(|A"=\
*/ D^US2B
private void insertSort(int[] data, int start, int len) { __.MS6"N
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); k/wD@H N
} Z}uY%]
} [B)!
} {eaR,d~X
} J~]@#=,v
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堆排序： P{6$".kIY
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package org.rut.util.algorithm.support; CMW4Zqau*
8e*skL
import org.rut.util.algorithm.SortUtil; EXr2d"
7UMZs7L$
/** X_o#!
* @author treeroot <Q9l'u]3$c
* @since 2006-2-2 .F 6US<]
* @version 1.0 .k]`z>uv
*/ <lf692.3
public class HeapSort implements SortUtil.Sort{ s"`~Xnf
.s*N1 U?h
/* (non-Javadoc) ?IHt T3'Rt
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) uNyN[U
*/ B\RAX#
public void sort(int[] data) { ^:{8z;w!(
MaxHeap h=new MaxHeap(); .h=n [`RB
h.init(data); N<rq}^qo
for(int i=0;i h.remove(); .T9$O]:o
System.arraycopy(h.queue,1,data,0,data.length); ?uSoJM`wa!
} {wz)^A sy
wBXa;.
private static class MaxHeap{ @^UgdD,BS,
z1Ieva]
void init(int[] data){ u>fMO9X}2
this.queue=new int[data.length+1]; :6nD"5(
for(int i=0;i queue[++size]=data; 'cpm 4mT
fixUp(size); U3a2wK
} {k3ItGQ_
} +fXwbZ?p
2~$S @c
private int size=0; (NLw#)?
3O2G+G2
private int[] queue; YQN:&Cls
940:NOgm
public int get() { uMw6b=/U
return queue[1]; Q&]|W Xv
} w/*G!o-<
'M~`IN`
public void remove() { (&SU)Uvu
SortUtil.swap(queue,1,size--); ~6t!)QATnp
fixDown(1); /(JG\Ut
} l{dsm1#W~
file://fixdown 9?,i+\)qK@
private void fixDown(int k) { >whv*@Fr
int j; OK80-/8HI
while ((j = k << 1) <= size) { "++\6H<
if (j < size %26amp;%26amp; queue[j] j++; 00 x-
if (queue[k]>queue[j]) file://不用交换 ]%A> swCpn
break; bs"J]">(N
SortUtil.swap(queue,j,k); {OEjITm
k = j; RlL]p`g
} l'(FM^8jv
} [y9a.*]u/@
private void fixUp(int k) { .gg0rTf=-
while (k > 1) { 6U !P8q
int j = k >> 1; Xb%Q%"?~
if (queue[j]>queue[k]) vWoppt
break; /*y5W-'d^
SortUtil.swap(queue,j,k); fG'~@'P~
k = j; ^ 0YQlT98
} >*{k~Y-G
} VBL4cU8D
3Tu]-.
} ;|vP|Xi
3Qe|'E,U
} P'qBqx[
L6_%SGY_iE
SortUtil： s<{ Hu0K$
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package org.rut.util.algorithm; ]_h3
m:h6J''<Z*
import org.rut.util.algorithm.support.BubbleSort; o+Jnn"8
import org.rut.util.algorithm.support.HeapSort; 4tCM2it%
import org.rut.util.algorithm.support.ImprovedMergeSort; Vr},+Rj
import org.rut.util.algorithm.support.ImprovedQuickSort; I*N"_uKU
import org.rut.util.algorithm.support.InsertSort; -NJpql{Cb
import org.rut.util.algorithm.support.MergeSort; t/;0/ql\
import org.rut.util.algorithm.support.QuickSort; |qMG@
import org.rut.util.algorithm.support.SelectionSort; FJZ'P;3
import org.rut.util.algorithm.support.ShellSort; |;US)B8}*Z
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/** Csuasi3]1d
* @author treeroot .1[.f}g$J
* @since 2006-2-2 '{2]:
* @version 1.0 S#M8}+ZD,
*/ ,)[9RgsE
public class SortUtil { b$DiDm
public final static int INSERT = 1; U/enq,-F^
public final static int BUBBLE = 2; 0]SWyC :
public final static int SELECTION = 3; ikc1,o
public final static int SHELL = 4; ~QbHp|g
public final static int QUICK = 5; kaCN^yQ
public final static int IMPROVED_QUICK = 6; Ge`7`D>L
public final static int MERGE = 7; jlP*RX
public final static int IMPROVED_MERGE = 8; Sh!c]r>\Q
public final static int HEAP = 9; L4Jm8sy{
jcqUY+T$
public static void sort(int[] data) { M]PZwW8
sort(data, IMPROVED_QUICK); 1.+O2qB
} }%Mdf6LS64
private static String[] name={ M v(Pp
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" SvSO?H!-
}; o08g]a
D@La-K*5
private static Sort[] impl=new Sort[]{ by>%}#M
new InsertSort(), Z2M(euzfi3
new BubbleSort(), +JtKVF
new SelectionSort(), ,}IcQu'O
new ShellSort(), f`Fj-<v
new QuickSort(), Acw`ytV
new ImprovedQuickSort(), u9@B&
new MergeSort(), {*O%A
new ImprovedMergeSort(), -]0:FKW
new HeapSort() CBd%}il
}; &tZIWV1&
<CVX[R]U
public static String toString(int algorithm){ Nx.9)MjI
return name[algorithm-1]; nKGQU,C
} Jai]z
F[}#7}xjA
public static void sort(int[] data, int algorithm) { `$f`55e
impl[algorithm-1].sort(data); "]=OR>
} uNn1qV
:o^ioX.J
public static interface Sort { @HbRfD/!
public void sort(int[] data); GPHb-
} 1TTS@\
P{)D_Bi
public static void swap(int[] data, int i, int j) { LKvX~68
int temp = data; @LI;q
data = data[j]; m[=SCH-;
data[j] = temp; W\>O$IX^e
} 5Lc@=,/0
} H"/JR