[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; 1p<*11
} li#ep?5h^
int i1=l; [8 23w.{]#
int i2=mid+1; 6J cXhlB`
for(int cur=l;cur<=r;cur++){ wX!0KxR/Z
if(i1==mid+1) SWT)M1O2
data[cur]=temp[i2++]; \vpX6!T
else if(i2>r) f>Tn#OW
data[cur]=temp[i1++]; muhu` k`C
else if(temp[i1] data[cur]=temp[i1++]; -f?,%6(1
else 1].m4vC
data[cur]=temp[i2++]; /NuO>kQa
} k? ,/om1
} U_UN& /f
Ksk[sf?J&
} F9r|EU#;
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改进后的归并排序: fEGnI\
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package org.rut.util.algorithm.support; ^^YP kh6sS
~ET XXu${I
import org.rut.util.algorithm.SortUtil; &F*eo`o}6
`84,R!
/** c;n\HYk
* @author treeroot 3,Iu!KB
* @since 2006-2-2 Odw9]`,T
* @version 1.0 i7&ay\+@
*/ ~;t/VsgGW
public class ImprovedMergeSort implements SortUtil.Sort { ^5k~7F.
$9W,1wg
private static final int THRESHOLD = 10; iRV=I,
QQ %W3D@
/* B f.- 5
* (non-Javadoc) X"jtPYCpV{
* i nk!>Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) dChMjaix
*/ B& 5Md.h
public void sort(int[] data) { u!t<2`:h
int[] temp=new int[data.length]; JC/nHM
mergeSort(data,temp,0,data.length-1); ih: XC
} R\x3'([A5
on1B~?*D
private void mergeSort(int[] data, int[] temp, int l, int r) { *{O[}
int i, j, k; xgvwH?<
int mid = (l + r) / 2; U@53VmrOy
if (l == r) 0E@*&Ru
return; sdN1BV2
if ((mid - l) >= THRESHOLD) AH:0h X6+
mergeSort(data, temp, l, mid); x((Rm_'
else . \8"f]~
insertSort(data, l, mid - l + 1); &QFc)QP{
if ((r - mid) > THRESHOLD) K :>O X
mergeSort(data, temp, mid + 1, r); e^N}(Kpy
else \AB)L{
insertSort(data, mid + 1, r - mid); nUCOHVI7
NFqGbA|
for (i = l; i <= mid; i++) { U[Lr+nKo\
temp = data; oA;ZDO06r
} 1=PTiDMJ<*
for (j = 1; j <= r - mid; j++) { tCv}+7)
temp[r - j + 1] = data[j + mid]; F4IU2_CnPD
} )`mBvS.}
int a = temp[l]; Sf2xI'
int b = temp[r]; %Y9CZRY9
for (i = l, j = r, k = l; k <= r; k++) { vX&W;&
if (a < b) { /*t H$\6*
data[k] = temp[i++]; 8/lgM'Eux
a = temp; }q,dJE
} else { n(sseQ|\
data[k] = temp[j--]; \Qf2:[-V0
b = temp[j]; W<$!H V$
} |FSp`P
} hV fANbs
} @E>I<j,D
gSe3S-Lt
/** v^Rw9*w{
* @param data Ml'lZ)
* @param l /Zxq-9
* @param i Q^X}7Z|T
*/ {+EnJ"
private void insertSort(int[] data, int start, int len) { d-z[=1m
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); h-DHIk3/
} gJ^taUE
} 4zZ.v"laVM
} x~](d8*=
} Vd'=Fe;eB
Xv+,Z<>iQ
堆排序： D2RvFlAXu
\m=k~Cf:f
package org.rut.util.algorithm.support; E;An':j
&q#. >
import org.rut.util.algorithm.SortUtil; ^z51f>C
?P/73p
/** 7R5+Q\W
* @author treeroot 1\g r ;b
* @since 2006-2-2 `O`MW} c
* @version 1.0 hoLA*v2<
*/ t/l<X]o
public class HeapSort implements SortUtil.Sort{ P(a}OlG
%D~Mij
/* (non-Javadoc) R\]C;@J<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \9`.jB~<
*/ {BgJ=0g?
public void sort(int[] data) { yJ;Qe_up
MaxHeap h=new MaxHeap(); $#(j2sL1
h.init(data); o'8nQ Tao
for(int i=0;i h.remove(); .hnq>R\
System.arraycopy(h.queue,1,data,0,data.length); p6ryUJc6
} 45OAJ?N
D0>Pc9
private static class MaxHeap{ #$F*.vQSs+
M`E}1WNQ?]
void init(int[] data){ <kWkc|zBY
this.queue=new int[data.length+1]; "=V!-+*@G@
for(int i=0;i queue[++size]=data; `>OKV;~{z
fixUp(size); 6Cfsh<]b
} %/qwqo`Q
} z[y
v8n^~=SH
private int size=0; amQTPNI
n~0MhE0H
private int[] queue; kI2+&
ae](=OQ
public int get() { /Z[HU{4
return queue[1]; ce; zn\
} lQy-&d|=#^
|kTq &^$
public void remove() { WBb*2
SortUtil.swap(queue,1,size--); !Uv>>MCr
fixDown(1); l]gW_wUQd
} q([{WZ:6Oq
file://fixdown =^\?{oV
private void fixDown(int k) { /_YTOSZjm
int j; y|zIuI-p
while ((j = k << 1) <= size) { >]o>iOz;]
if (j < size %26amp;%26amp; queue[j] j++; Z]x6np
if (queue[k]>queue[j]) file://不用交换 mI]gDL1
break; 5"X@<;H%
SortUtil.swap(queue,j,k); %0Qq~J@Lu
k = j; e1%kW1Z9
} %?Q&a ]
} 9ExI,
private void fixUp(int k) { \L`x![$~q
while (k > 1) { EY:H\4)
int j = k >> 1; p}5413z5Z=
if (queue[j]>queue[k]) SpYmgL?wJ
break; FZIC|uz
SortUtil.swap(queue,j,k); N;k)>
k = j; <lLJf8OK
} M?GkHJ%!
} ia3!&rZ
/)kx`G_
} PB!XApTb
y,bDi9*|
} vVrM[0*c
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SortUtil： v`]y:Ku|wR
>Bu9D
package org.rut.util.algorithm; \9uK^oS
uPjp5;V
import org.rut.util.algorithm.support.BubbleSort; `uZMln @
import org.rut.util.algorithm.support.HeapSort; f1;@a>X
import org.rut.util.algorithm.support.ImprovedMergeSort; Tu5p`p3-j
import org.rut.util.algorithm.support.ImprovedQuickSort; ael] {'h]
import org.rut.util.algorithm.support.InsertSort; ZKq#PB/.
import org.rut.util.algorithm.support.MergeSort; UEhFId
import org.rut.util.algorithm.support.QuickSort; M{)&SNI*C
import org.rut.util.algorithm.support.SelectionSort; j%Xa8$
import org.rut.util.algorithm.support.ShellSort; "a3?m)
adAdX;@e`
/** $RNHRA.
* @author treeroot +\)Y,@cw
* @since 2006-2-2 vU]n0)<KB
* @version 1.0 @LSh=o+
*/ u[oV Jvc
public class SortUtil { T7Y}v,+-
public final static int INSERT = 1; ]>Gi_20*.
public final static int BUBBLE = 2; ;NrPMz
public final static int SELECTION = 3; &flRrJ
public final static int SHELL = 4; es~1@Jb
public final static int QUICK = 5; 3^xq+{\)
public final static int IMPROVED_QUICK = 6; +l.LwA
public final static int MERGE = 7; cc:$$_'L
public final static int IMPROVED_MERGE = 8; <(B|g&A
public final static int HEAP = 9; t`R{N1
]!~?j3-k Q
public static void sort(int[] data) { Q'JK *.l
sort(data, IMPROVED_QUICK); u6Wan*I?
} Y_EEnx&>i
private static String[] name={ DEt!/a{X
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" }`%ks
}; 57 Bx-
;R Jv7@
private static Sort[] impl=new Sort[]{ k7;i^$@c
new InsertSort(), /wl]kGF
new BubbleSort(), U_j[<.aN)
new SelectionSort(), A*A/30o|R
new ShellSort(), 3vjOfr`
new QuickSort(), xUCq%r_
new ImprovedQuickSort(), DdUw~n,
new MergeSort(), o4J@M{xb_
new ImprovedMergeSort(), g_N^Y
new HeapSort() }P-C-L{yE(
}; {@3v$W~7M
E^br-{|{
public static String toString(int algorithm){ h/5S2EB0!O
return name[algorithm-1]; I,`;#Q)nx
} HtiIg a 7
eU,FYJt9
public static void sort(int[] data, int algorithm) { K"&^/[vMB
impl[algorithm-1].sort(data); 'Cz*p,
} jD}h`(bE
?6{g7S%
public static interface Sort { kS=nH9
public void sort(int[] data); [#RFdn<
} 5E1`qof
`9+R]C]z8
public static void swap(int[] data, int i, int j) { u@`a~
int temp = data; !H[01
data = data[j]; 1q3"qYH
data[j] = temp; w6)Q5H53)
} XWQ `]m)
} VB#&`]rdo