[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; T> < Vw
} r0Cc0TMdj
int i1=l; II,snRD
int i2=mid+1; Tr\6AN?o
for(int cur=l;cur<=r;cur++){ 3AQu\4+A
if(i1==mid+1) Q|$?d4La8
data[cur]=temp[i2++]; B)L=)N
else if(i2>r) {?+dVLa^;
data[cur]=temp[i1++]; E\_Wpk
else if(temp[i1] data[cur]=temp[i1++]; Q`0k=<
else wO-](3A-8P
data[cur]=temp[i2++]; {p90
} 7>@g)%",
} H Z)an
9y$"[d27;+
} L!>EW0
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改进后的归并排序: K|a^<| S
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package org.rut.util.algorithm.support; X:/Y^Xu
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import org.rut.util.algorithm.SortUtil; ~#]$YoQ&O
3Yb2p!o
/** ZH s' #
* @author treeroot th4yuDPuA
* @since 2006-2-2 =Rw-@*#l
* @version 1.0 ^.Xom~
*/ PV(TDb:0
public class ImprovedMergeSort implements SortUtil.Sort { 'F .tOD
!et[Rdbu
private static final int THRESHOLD = 10; XX9u%BZ~
o$XJSz|6
/* }#bX{?f
* (non-Javadoc) kv8 /UW
* yG/_k!{9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,Oj 53w=
*/ {=Y3[
public void sort(int[] data) { Vi:<W0:
int[] temp=new int[data.length]; )a;ou>u
mergeSort(data,temp,0,data.length-1); vR*TW
} aP`[O]8j
^1}Y=!&
private void mergeSort(int[] data, int[] temp, int l, int r) { T+knd'2V6
int i, j, k; _oU}>5
int mid = (l + r) / 2; i0jR~vF {B
if (l == r) QRw/d}8l
return; G&DL)ePu]m
if ((mid - l) >= THRESHOLD) wF\5 X
mergeSort(data, temp, l, mid); Fx]}<IudA^
else 7%7 \2!0J}
insertSort(data, l, mid - l + 1); y]YUuJ9a
if ((r - mid) > THRESHOLD) PKK18E}{%^
mergeSort(data, temp, mid + 1, r); %=G*{mK
else qiyX{J7Z
insertSort(data, mid + 1, r - mid); OtsW>L@ O(
}$wWX}@
for (i = l; i <= mid; i++) { ==^9_a^
temp = data; +`p@md2L1
} QKAt%"1&
for (j = 1; j <= r - mid; j++) { ?*K{1Ghf
temp[r - j + 1] = data[j + mid]; W&'[Xj
} Up*.z\|'y
int a = temp[l]; M~SbIk<#a<
int b = temp[r]; z{uRqAG
for (i = l, j = r, k = l; k <= r; k++) { @TqqF:c7
if (a < b) { ch-.+p3
data[k] = temp[i++]; qVe&nXo
a = temp; 0DQ\akh
} else { >I&'Rj&Mc
data[k] = temp[j--]; 3{/Y&/\"'^
b = temp[j]; xA7Aw0
} 8~6H\.0Q
} cZFG~n/
} s<hl>vY_'
=VFPZ
/** ~MZEAY9
* @param data gd=gc<zYP
* @param l a}#8n^2
* @param i V!XT=Ou?6
*/ r,FPTf
private void insertSort(int[] data, int start, int len) { qHtonJc
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Q"VS;uh.v
} ))xyaYIZkk
} 1{0 L~
} 6|HxBC#4
} Oh]RIWL
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堆排序： L&nqlH@+~
N#!**Q 0
package org.rut.util.algorithm.support; hALg5.E{T
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import org.rut.util.algorithm.SortUtil; +Dwq>3AH
8gK <xp
/** 'G>gNq
* @author treeroot (h$[g"8
* @since 2006-2-2 i7#PYt
* @version 1.0 Q}qw`L1
*/ O% }EpIP_
public class HeapSort implements SortUtil.Sort{ K|Kc.
NB@TyU
/* (non-Javadoc) #eZm)KFQg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E{B8+T:3
*/ Zp'q;h_
public void sort(int[] data) { O_bgrXg6x
MaxHeap h=new MaxHeap(); Dqz9NB
h.init(data); `COnb@uD
for(int i=0;i h.remove(); ]@G$L,3
System.arraycopy(h.queue,1,data,0,data.length); a*GiLq
} )h>H}wDs
~;ZT<eCIA
private static class MaxHeap{ QswbIP/>:'
gK Uci
void init(int[] data){ =e j'5m($3
this.queue=new int[data.length+1]; =|Vm69
for(int i=0;i queue[++size]=data; .`; bQh'!
fixUp(size); F&[MyXU4
} "%[aWb
} N{<9Njmm
I4RUXi 5
private int size=0; M%S.Z4D (0
x } X1 O)
private int[] queue; 8F(Vd99I
>M-ZjT>
public int get() { Of?3|I3 l
return queue[1]; fHc/5uYW
} ;mtv
rfwX:R6,g
public void remove() { k'b'Ay(<
SortUtil.swap(queue,1,size--); j7u\.xu9
fixDown(1); hxX-iQya
} g71|t7Q
file://fixdown 16Gp nb
private void fixDown(int k) { fk!P#
int j; h^aUVuL/
while ((j = k << 1) <= size) { '|~L9t
if (j < size %26amp;%26amp; queue[j] j++; YVT\@+C'
if (queue[k]>queue[j]) file://不用交换 *s[bq;$
break; 3^x C=++
SortUtil.swap(queue,j,k); bxFDB^
k = j; PZB_6!}2[F
} *$/!.e
} #qPWJ
private void fixUp(int k) { V 'e_gH
while (k > 1) { lAZn0EU
int j = k >> 1; /GUbc
if (queue[j]>queue[k]) :0o,pndU
break; SGK=WLGM8
SortUtil.swap(queue,j,k); sY*iRq
k = j; {=A8kgt
} yD\[`!sWk
} tIJ?caX5=
@Z{!T)#}j
} o%1dbbh
XI8rU)q
} ]%I}hjJ
rV6SN.
SortUtil： n)6mfoe
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package org.rut.util.algorithm; #\LsM ~,
} 0^wJs
import org.rut.util.algorithm.support.BubbleSort; Z<M?_<3
import org.rut.util.algorithm.support.HeapSort; ,{rm<M.)
import org.rut.util.algorithm.support.ImprovedMergeSort; B$)&;Q
import org.rut.util.algorithm.support.ImprovedQuickSort; BH+@!H3hf
import org.rut.util.algorithm.support.InsertSort; d4[mR~XXT
import org.rut.util.algorithm.support.MergeSort; qQ=\R1l
import org.rut.util.algorithm.support.QuickSort; +\@}IKWl-?
import org.rut.util.algorithm.support.SelectionSort; V3] Z~@
import org.rut.util.algorithm.support.ShellSort; U)B^R
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/** E>2~cC*
* @author treeroot hnD=DLW $
* @since 2006-2-2 cZd{K[fuK
* @version 1.0 /ltGSl
*/ jcVK4jW
public class SortUtil { N sNk
public final static int INSERT = 1; yL.Z{wd
public final static int BUBBLE = 2; |bWvQdN
public final static int SELECTION = 3; aW.[3M;?v
public final static int SHELL = 4; O77bm,E
public final static int QUICK = 5; ImZ!8#
public final static int IMPROVED_QUICK = 6; )e6)~3[^
public final static int MERGE = 7; _Vl22'wl
public final static int IMPROVED_MERGE = 8; WY3D.z-</
public final static int HEAP = 9; "oc&uj
QO|roE
public static void sort(int[] data) { }_[Bp
sort(data, IMPROVED_QUICK); [l%6wIP&{
} CUG3C
private static String[] name={ -w#*~Q{'*
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8n`O{8:fi
}; Bk)*Z/1<x
[<H'JsJl
private static Sort[] impl=new Sort[]{ |^!
new InsertSort(), y)%CNH)*x
new BubbleSort(), AFN"#M
new SelectionSort(), G$T#ql
new ShellSort(), /Q*o6Gys0
new QuickSort(), W!.vP~>
new ImprovedQuickSort(), x.ZW%P1
new MergeSort(), LH_rc
new ImprovedMergeSort(), +#Q\;;FNP
new HeapSort() `eXTVi|0"~
}; &Bfgvws;
+*AdSzX
public static String toString(int algorithm){ .W/#$s|X\
return name[algorithm-1]; ugT;NB
} $ &III
5S&'O4yz^
public static void sort(int[] data, int algorithm) { D Xjw"^x
impl[algorithm-1].sort(data); B>=NE.ulUL
} ~EJ+<[/
We51s^(
public static interface Sort { 08 $y1;
public void sort(int[] data); L2GUrf
} |?=a84n1l
_RI!Z
public static void swap(int[] data, int i, int j) { 07FS|>DM'Z
int temp = data; 0!6n
data = data[j]; |:jka
data[j] = temp; Rx\.x? &
} XoZPz
} GiH<6<=