[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; RYhdf
} Em]T.'y
int i1=l; N7jRdT2k%
int i2=mid+1; CM#EA"9
for(int cur=l;cur<=r;cur++){ 88*RlxU
if(i1==mid+1) d!LV@</
data[cur]=temp[i2++]; ( gFA? aD<
else if(i2>r) &sNID4FR
data[cur]=temp[i1++]; aw4+1.xy
else if(temp[i1] data[cur]=temp[i1++]; `x#~-
else GSFT(XX
data[cur]=temp[i2++]; s+w<!`-
} Y'HF^jv]R
} {pg@JA
0*"j:V
} J-f0
#&:nkzd
改进后的归并排序: 7w$R-Y/E
[uY2Nh
package org.rut.util.algorithm.support; 7r<>^j'
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import org.rut.util.algorithm.SortUtil; ,6bMfz
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/** ppD~xg]
* @author treeroot A X#!9-m3
* @since 2006-2-2 te''sydUS
* @version 1.0 a?MtY EK2
*/ UKBMGzu2:
public class ImprovedMergeSort implements SortUtil.Sort { 1G;Ns] u
"$'~=' [
private static final int THRESHOLD = 10; 6K y;1$
5q#|sVT7R
/* yk)j;i4@
* (non-Javadoc) prs<ZxbQb
* Xda<TX@-
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) iHn]yv3 #
*/ _Kj.
public void sort(int[] data) { c>!J@[,
int[] temp=new int[data.length]; V<pqc&f.
mergeSort(data,temp,0,data.length-1); -Mvw'#(0
} ~.lH)
DQICD.X6R
private void mergeSort(int[] data, int[] temp, int l, int r) { *!/#39
int i, j, k; -]A#G`'
int mid = (l + r) / 2; .%<&W1
if (l == r) 4~Pto f@
return; Ft rw3OxN
if ((mid - l) >= THRESHOLD) C941@I
mergeSort(data, temp, l, mid); 7tpZE+OX
else 2ML6Lkk
insertSort(data, l, mid - l + 1); &NQR*Tn
if ((r - mid) > THRESHOLD) eM"mP&TTL
mergeSort(data, temp, mid + 1, r); sN}@b8o@
else t>sX.=\$
insertSort(data, mid + 1, r - mid); Lp WEu^j
L# 1vf
for (i = l; i <= mid; i++) { S:uEK
temp = data; SkA'+(
} XXcf!~uO
for (j = 1; j <= r - mid; j++) { EXcjF
temp[r - j + 1] = data[j + mid]; xi\RUAW
} `VE&Obp[
int a = temp[l]; P$ef,ZW"
int b = temp[r]; Hu7zmh5FF
for (i = l, j = r, k = l; k <= r; k++) { [\ YP8^..
if (a < b) { =*}Mymhk(
data[k] = temp[i++]; +|<&#b0Xd
a = temp; aF"Z!HD
} else { Hc%\9{zH
data[k] = temp[j--]; =M#?*e
b = temp[j]; -b}S3<15@
} X4G55]D$>
} 05 Q8`
} y;Ln ao7i
pe%)G6@G
/** Ur(o&,
* @param data 8#u_+;,p
* @param l U3K<@r
* @param i h}>/Z3*
*/ Kn$1W=B1.
private void insertSort(int[] data, int start, int len) { ] *VF Ws
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3a}`xCO5
} mZVOf~9E
} 51ebE`
} U(=9&c@]
} PjW+V`
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堆排序： C'2 =0oou
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package org.rut.util.algorithm.support; ~+ wamX3
g Pj0H&,.
import org.rut.util.algorithm.SortUtil; %=8(B.I!
2\\3<
/** @h$0S+?:
* @author treeroot [(F<|f:n
* @since 2006-2-2 dd7nO :]
* @version 1.0 F'$S!K58
*/ 4`P2FnJ?
public class HeapSort implements SortUtil.Sort{ O)JUY*&I5
EJ ~kZ3
/* (non-Javadoc) ,wi=!KzX
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9PqgBq
*/ U"Hquo
public void sort(int[] data) { 3t{leuO'
MaxHeap h=new MaxHeap(); PbHh?iH
h.init(data); M .`
for(int i=0;i h.remove(); K!c@aD:#
System.arraycopy(h.queue,1,data,0,data.length); |kNGpwpI
} ls7A5 <
U.7y8#qf3R
private static class MaxHeap{ [ky6E*dV`
{3(.c, q@
void init(int[] data){ Z;~[@7`
this.queue=new int[data.length+1]; <ii1nz
for(int i=0;i queue[++size]=data; E5BgQ5'
fixUp(size); 'b?.\Bm;
} |z]2KjF&w-
} Cm;qDvj+u
)USC
private int size=0; ]z=Vc#+!
L##8+OJ.L
private int[] queue; pl,Z
n`z+ w*
public int get() { ^%%5
return queue[1]; >-@ U_p
} "SU-^z
e_c;D2'F
public void remove() { fTHun?Vn
SortUtil.swap(queue,1,size--); ?5v5:U(A
fixDown(1); {I-a;XBX
} k gu[!hD1
file://fixdown nlebFDb7
private void fixDown(int k) { <j 9Mt=8M
int j; soq".+Q
while ((j = k << 1) <= size) { qm}>J^hnB#
if (j < size %26amp;%26amp; queue[j] j++; l \^nC2
if (queue[k]>queue[j]) file://不用交换 <VaMUm<2
break; %|(?!w7
SortUtil.swap(queue,j,k); C9F+e
k = j; 90qj6.SQ
} CSL{Q
} y /:T(tk$
private void fixUp(int k) { $C05iD
while (k > 1) { L=HVdeE
int j = k >> 1; |^PLZ>
if (queue[j]>queue[k]) MFH"$t+
break; WTD49_px
SortUtil.swap(queue,j,k); k<Tez{<
k = j; 3Q$'qZw p
} hygnC`|
} hiMyFvA4
3K#mF7)a
} fcE)V#c"g
j:e^7|.
} `N,Vs n"
_+*/~E
SortUtil： Ybt_?Q9#]
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package org.rut.util.algorithm; <m>l-]
PNJe&q0*
import org.rut.util.algorithm.support.BubbleSort; f>8B'%]
import org.rut.util.algorithm.support.HeapSort; !rXcGj(k
import org.rut.util.algorithm.support.ImprovedMergeSort; >WGP{
import org.rut.util.algorithm.support.ImprovedQuickSort; kWs+2j
import org.rut.util.algorithm.support.InsertSort; 9y^kb+
import org.rut.util.algorithm.support.MergeSort; ?cO8'4 bq
import org.rut.util.algorithm.support.QuickSort; L8dU(P
import org.rut.util.algorithm.support.SelectionSort; >Qm<-g
import org.rut.util.algorithm.support.ShellSort; t[?a@S~6
o'eI(@{F=
/** G;Wkm|
* @author treeroot j6e}7
* @since 2006-2-2 7rdw`
* @version 1.0 {x[;5TM
*/ ("?&p3];b
public class SortUtil { ;V~rWzKM(
public final static int INSERT = 1; kG$E tE#
public final static int BUBBLE = 2; '(*&Ax
public final static int SELECTION = 3; AbF(MK=i
public final static int SHELL = 4; &]VQR2J}:
public final static int QUICK = 5; !{Q:(B#ec
public final static int IMPROVED_QUICK = 6; {xv?wenE
public final static int MERGE = 7; CQSpPQA
public final static int IMPROVED_MERGE = 8; %GX uuE}mX
public final static int HEAP = 9; RVkU+7
^`rpf\GX(
public static void sort(int[] data) { d@4rD}_Z
sort(data, IMPROVED_QUICK); \TbsoWX
} +5HnZ?E\
private static String[] name={ V#NG+U.B
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" m ZtvG,
}; KZF0rW
ou'~{-_xd
private static Sort[] impl=new Sort[]{ VT% KN`l
new InsertSort(), gMs+?SNHAh
new BubbleSort(), '%SR.JL
new SelectionSort(), CGC-"A/W
new ShellSort(), pcy<2UV
new QuickSort(), 5{13V*<
new ImprovedQuickSort(), <&5m N
new MergeSort(), yuHZ&e
new ImprovedMergeSort(), X(k{-|9]
new HeapSort() KdT[*-
}; DH:GI1Yu>I
iuC7Y|
public static String toString(int algorithm){ 1~2R^#rm
return name[algorithm-1]; jg [H}
} sdJ%S*)5G$
(#!]fF"!x
public static void sort(int[] data, int algorithm) { |5xYT 'V
impl[algorithm-1].sort(data); eOm< !H
} <nWKR,
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public static interface Sort { N]14
public void sort(int[] data); ZfPd0 p
} jt{9e:2%
>Mvka;T]
public static void swap(int[] data, int i, int j) { ~x|aoozL
int temp = data; ~:>AR` 9G
data = data[j]; #:J:YMv
data[j] = temp; *@_u4T7|{
} keLR1qf
} 7]Al*)