[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; @cc4]>4
} +c&oF,=}!P
int i1=l; ?^f=7e8]
int i2=mid+1; gjbSB6[
for(int cur=l;cur<=r;cur++){ vZ0K1UTEXY
if(i1==mid+1) APR"%(xD#
data[cur]=temp[i2++]; hv4om+
else if(i2>r) 8l<4OgoK
data[cur]=temp[i1++]; 4nvi7
else if(temp[i1] data[cur]=temp[i1++]; SAQ|1I#"/
else MjjN
data[cur]=temp[i2++]; /);S?7u.
} SO!|wag$
} KO!.VxG]_
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} y'{*B(
q eW{Cl~
改进后的归并排序: {D>@ZC
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package org.rut.util.algorithm.support; s+omCr|H;A
\jHHj\LLr.
import org.rut.util.algorithm.SortUtil; +xL*`fn
-%,3qhsd
/** IGKtugU%
* @author treeroot D~^P}_e.
* @since 2006-2-2 ,JU3w
* @version 1.0 Q"(*SA+-|
*/ 5w^6bw){
public class ImprovedMergeSort implements SortUtil.Sort { iL48
/ %9DO
private static final int THRESHOLD = 10; Vs"1:gi&
\H&8.<HJ
/* dm(Xy'*iQ
* (non-Javadoc) VnU/_#n
* Cu\6VnW_6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (gQr?K
*/ $yoIz.?V
public void sort(int[] data) { &%=]lP]
int[] temp=new int[data.length]; +m>)q4e
mergeSort(data,temp,0,data.length-1); :4\=xGiY
} exP:lO_0n
gXb * zt2
private void mergeSort(int[] data, int[] temp, int l, int r) { FdcmA22k*
int i, j, k; [11D7L%1t
int mid = (l + r) / 2; ,qz:(Nr
if (l == r) R5b!Ao
return; 2m8|0E|@
if ((mid - l) >= THRESHOLD) wRj||yay#-
mergeSort(data, temp, l, mid); Z!81\5
else S}}L& _
insertSort(data, l, mid - l + 1); # 9@K
if ((r - mid) > THRESHOLD) lK2=[%,~
mergeSort(data, temp, mid + 1, r); ZR[6-
else )?$zY5
insertSort(data, mid + 1, r - mid); Q&?^eOI&#(
N~)RR {$w
for (i = l; i <= mid; i++) { Kt*kARN?
temp = data; {yCE>F\
} "?n;dXYSi
for (j = 1; j <= r - mid; j++) { +YFAZv7`
temp[r - j + 1] = data[j + mid]; }fqy vI
} tupAU$h?!
int a = temp[l]; C&/_mm5
int b = temp[r]; AK_,$'f
for (i = l, j = r, k = l; k <= r; k++) { ]ME2V
if (a < b) { 5\jzIB_?
data[k] = temp[i++]; ZQ)vvD<
a = temp; W2T-TI,>PC
} else { $ vt6~nfI
data[k] = temp[j--]; PFSh_9.q
b = temp[j]; K2@],E?e%|
} C(J+tbk
} Evy_I+l
} 'u84d=*l
2,^U8/
/** i[O{M`Z%
* @param data 14S_HwX
* @param l {=Z _L?j
* @param i m2j]wUh"
*/ &0k`=?v$
private void insertSort(int[] data, int start, int len) { d cG)ql4d
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); %h9'kJzNk
} t^|GcU]
} .:(T}\]R
} PZYVLUw `
} i$jzn ga
'S'Z-7h>0
堆排序： #J`MR05
@;b @O _
package org.rut.util.algorithm.support; 9lR-
A2p]BW&
import org.rut.util.algorithm.SortUtil; ?C`&*+
E06)&tF
/** UPGS/Xs]1
* @author treeroot s)-O{5;U
* @since 2006-2-2 pkEx.R)
* @version 1.0 Y$<p_X,
*/ QnH;+k ln
public class HeapSort implements SortUtil.Sort{ 0wpGIT!2
mXK7y.9\
/* (non-Javadoc) j|DjO?._'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ,(v=ZeI
*/ r=Od%
public void sort(int[] data) { '&<saqA
MaxHeap h=new MaxHeap(); _(J4
h.init(data); n?S~(4%
for(int i=0;i h.remove(); (4Ha'uqz
System.arraycopy(h.queue,1,data,0,data.length); iL8:I)z
} rGgP9 (
Mq Q'Kjo
private static class MaxHeap{ NhRKP"<CO
bS&XlgnKi
void init(int[] data){ G@8wv J
this.queue=new int[data.length+1]; X 3(CY`HH[
for(int i=0;i queue[++size]=data; )=Ens=>Z
fixUp(size); C)(/NGf
} !9]q+XefJ
} :P?zy|aBi
V[^+lR
private int size=0; !JnxNIr&i|
ewOe A|
private int[] queue; \o<&s{6L
?O.'_YS
public int get() { 8umW>
return queue[1]; (RafidiH
} abtYa
byN4?3F
public void remove() { Nc\jA=
SortUtil.swap(queue,1,size--); ;uyQR8
fixDown(1); +Cs.v.GA5
} >goG\y
file://fixdown 9ohO-t$XkY
private void fixDown(int k) { ot; ]?M
int j; SS7C|*-Zd
while ((j = k << 1) <= size) { $m[*)0/
if (j < size %26amp;%26amp; queue[j] j++; 5-.{RU=
if (queue[k]>queue[j]) file://不用交换 VmP5`):?b
break; /ULO#CN?;
SortUtil.swap(queue,j,k); $LHF=tYS
k = j; 7i0;Ss*
} Gi Max
} ~M9&SDT/lB
private void fixUp(int k) { ; -,VJCPi
while (k > 1) { }c,:uN
int j = k >> 1; ;wF)!d
if (queue[j]>queue[k]) ~=/.ZUQNX
break; !I+F8p
SortUtil.swap(queue,j,k); Np>0c-S
k = j; G4{TJ,~
} XEb+Z7L1
} T&u25"QOf
Y8Z-m (OQ
} H5/w!y@
y;ymyy&
} e?\34F
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SortUtil： Wf>=^ ~`
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package org.rut.util.algorithm; ^^kL.C Ym
Dy^A??A[E}
import org.rut.util.algorithm.support.BubbleSort; U{ZKxE
import org.rut.util.algorithm.support.HeapSort; }ZkGH}K_}
import org.rut.util.algorithm.support.ImprovedMergeSort; 7f\/cS^
import org.rut.util.algorithm.support.ImprovedQuickSort; o>MB8[r
import org.rut.util.algorithm.support.InsertSort; '$y.`/$
import org.rut.util.algorithm.support.MergeSort; QR(j7>+J^
import org.rut.util.algorithm.support.QuickSort; <~P([5
import org.rut.util.algorithm.support.SelectionSort; 3Ss)i7
import org.rut.util.algorithm.support.ShellSort; ,Lr}P
G4QsR7
/** 'tMS5d)4:
* @author treeroot pL`)^BJ
* @since 2006-2-2 !DZ4C.
* @version 1.0 91:TE8?Z
*/ Pw/$ }Q9X
public class SortUtil { NY\-p=3c7=
public final static int INSERT = 1; [WBU_
public final static int BUBBLE = 2; L]3gHq
public final static int SELECTION = 3; #p/'5lA&j
public final static int SHELL = 4; t[%ELHV
public final static int QUICK = 5; 9}#9i^%}
public final static int IMPROVED_QUICK = 6; "fWm{;
public final static int MERGE = 7; 0s%]%2ON
public final static int IMPROVED_MERGE = 8; &U{"dJr
public final static int HEAP = 9; 'aJm4W&j
wY_! s Qo
public static void sort(int[] data) { }080=E
sort(data, IMPROVED_QUICK); *(j-jbA
} f\c%G=y
private static String[] name={ b_GAK
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" @h)X3X
}; %)PQomn?
DP=\FG"}x
private static Sort[] impl=new Sort[]{ p0@l581
new InsertSort(), {^6<Ohe4j
new BubbleSort(), P/ 7aj:h~P
new SelectionSort(), L^{wxOf&6E
new ShellSort(), {!37w[s~
new QuickSort(), 7^n{BsN
new ImprovedQuickSort(), -A)/CFIZ
new MergeSort(), qY|NA)E)Bp
new ImprovedMergeSort(), ^_XV}&7Q
new HeapSort() QI{<q<
}; _[8sL^
>|_B=<!99W
public static String toString(int algorithm){ 4 ky/a1y-
return name[algorithm-1]; Fu"@)xw/-q
} ;1L7+.A
AS]jJc^
public static void sort(int[] data, int algorithm) { D}L4uz?
impl[algorithm-1].sort(data); \!!1o+#1j
} 0;:AT|U/d
pb}4{]sI
public static interface Sort { &1M#;rE;D#
public void sort(int[] data); k{ibD5B
} q-4#)EnW
T8\%+3e.
public static void swap(int[] data, int i, int j) { #PZBh
int temp = data; kYU!6t1
data = data[j]; TTm
data[j] = temp; D0@d}N
} ]R6Z(^XT,E
} vH/Y]Am