[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; %SCu29km
} hm>*eJNp]
int i1=l; Wh5O{G@Ut
int i2=mid+1; avu,o
for(int cur=l;cur<=r;cur++){ BtChG] N|
if(i1==mid+1) @U@yIv
data[cur]=temp[i2++]; u2-7vudh
else if(i2>r) u(702S4
data[cur]=temp[i1++]; gH3kX<e
else if(temp[i1] data[cur]=temp[i1++]; :g#it@
else E e>j7k.G.
data[cur]=temp[i2++]; uW=NH;u
} &,]+>
} @~3c"q;i7
zD<9A6AB
} `gN68:B
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改进后的归并排序: om?CFl
yXg1N N
package org.rut.util.algorithm.support; X:&p9_O@
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import org.rut.util.algorithm.SortUtil; G6{A[O[
E2'e}RQ
/** ZGhoV#T@
* @author treeroot J5_Y\@
* @since 2006-2-2 N'P,QiR,z<
* @version 1.0 .+}o'rU
*/ !!%[JR)cS
public class ImprovedMergeSort implements SortUtil.Sort { Wy*7jB
DAHf&/JK
private static final int THRESHOLD = 10; K"j=_%{
2-!Mao"^
/* &>.1%x@R
* (non-Javadoc) #l#[\6
* q- (NZno
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) \N+Ta:U1P
*/ LoE(W|nj
public void sort(int[] data) { ;<@6f@
int[] temp=new int[data.length]; rq["O/2
mergeSort(data,temp,0,data.length-1); iLcadX
} {))S<_yN
pm@Z[g
private void mergeSort(int[] data, int[] temp, int l, int r) { x*8f3^ wE
int i, j, k; T,2Dr;
int mid = (l + r) / 2; 2%C5P0;QX
if (l == r) 7u5\#|yL
return; OKP_3Ns
if ((mid - l) >= THRESHOLD) ESjJHZoD(
mergeSort(data, temp, l, mid); ZHECcPhz
else kah3Uhr~
insertSort(data, l, mid - l + 1); I S8nvx\
if ((r - mid) > THRESHOLD) u;ooDIq@
mergeSort(data, temp, mid + 1, r); Bye@5D
else }"B? 8T@_~
insertSort(data, mid + 1, r - mid); tW"ptU^9)
1idjX"'
for (i = l; i <= mid; i++) { CU1\C*
temp = data; kJi&9
} tr9Y1vxo{
for (j = 1; j <= r - mid; j++) { &9w%n
temp[r - j + 1] = data[j + mid]; y<%.wM]-J
} )]?egw5l
int a = temp[l]; I5yd )72
int b = temp[r]; I= h4s(
for (i = l, j = r, k = l; k <= r; k++) { 0$ 9;pzr
if (a < b) { 9'#.>Q>0=j
data[k] = temp[i++]; e$+f~~K
a = temp; a05:iFoJ
} else { *R\/#Y|
data[k] = temp[j--]; xT?}wF
b = temp[j]; _q$LrAT
} 6+nMH +[
} QC5f:BwM
} ^Z4q1i)JO
l3?,gd.-
/** Rk jKIa
* @param data P,;b'-5C
* @param l %>9+1lUhV
* @param i +bc#GzVF
*/ !QR?\9`
private void insertSort(int[] data, int start, int len) { a$zm/
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 3^R][;
} nR@,ouB-$
} +>:_kE]?nX
} $K.%un Gm
} m7wc)"`t
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堆排序： Fr3d#kVR
pG F5aF7T
package org.rut.util.algorithm.support; CziaxJ
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import org.rut.util.algorithm.SortUtil; :7Z\3_D/
opcR~tg@r
/** DPS1GO*
* @author treeroot J={OOj
* @since 2006-2-2 iPY vePQ
* @version 1.0 <m/b]|
*/ yg-FJ/
public class HeapSort implements SortUtil.Sort{ MpIw^a3(r
HEB/\
/* (non-Javadoc) mB^I@oZ*
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AJ?}Hel[0
*/ E/8u'
public void sort(int[] data) { /x:(SR2,
MaxHeap h=new MaxHeap(); e8ULf~I
h.init(data); : >wQwf
for(int i=0;i h.remove(); T7lj39pJq
System.arraycopy(h.queue,1,data,0,data.length); n:*_uc^C
} vJj:9KcP>h
by|?g8
private static class MaxHeap{ 9 yW~79n
N5f0|U&
void init(int[] data){ tf7v5iGe
this.queue=new int[data.length+1]; <5ft6a2fQ
for(int i=0;i queue[++size]=data; @W1WReK]f
fixUp(size); tFvgvx\:
} }}``~
} PJK]t7vp
"ji$@b_\?
private int size=0; jW1YTQ
wj#J>C2]
private int[] queue; .YjrV+om1
fzRyG-cEpj
public int get() { @!":(@3[
return queue[1]; |z#m
} YV1a3
gY>;|),
public void remove() { 65waq~#
SortUtil.swap(queue,1,size--); QxL@'n#5
fixDown(1); J)$&z*!
} S)\JWXi~:J
file://fixdown ?@lx
private void fixDown(int k) { j(Fa=pi
int j; Q3BLL`W~
while ((j = k << 1) <= size) { 9QC"Od9H
if (j < size %26amp;%26amp; queue[j] j++; Y/^[qD
if (queue[k]>queue[j]) file://不用交换 |.Nr.4Yp
break; C7b 5%a!
SortUtil.swap(queue,j,k); N#RD:"RS!
k = j; o<D3Y95b
} 7wiK.99
} Q\o$**+{
private void fixUp(int k) { u>,lf\Fgz
while (k > 1) { XN~#gm#
int j = k >> 1; g{A3W) [ b
if (queue[j]>queue[k]) dysX
break; DOF?(:8Y
SortUtil.swap(queue,j,k); %z-dM` i
k = j; f[JI/H>
} d s|8lz,
} ?jNF6z*M6
qeQC&U y;
} fuNl4BU
P[rAJJN/E
} 2I]]WBW#:
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SortUtil： |'U,/
";)r*UgR{B
package org.rut.util.algorithm; kZU"Xn
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import org.rut.util.algorithm.support.BubbleSort; r~Y>+ln.
import org.rut.util.algorithm.support.HeapSort; W>p\O9BG
import org.rut.util.algorithm.support.ImprovedMergeSort; 5E]UI YAkV
import org.rut.util.algorithm.support.ImprovedQuickSort; hi;WFyJTu
import org.rut.util.algorithm.support.InsertSort; wUZQB1$F
import org.rut.util.algorithm.support.MergeSort; NK+FQ^m[
import org.rut.util.algorithm.support.QuickSort; T>\nWancQM
import org.rut.util.algorithm.support.SelectionSort; %PQldPL8
import org.rut.util.algorithm.support.ShellSort; u;+%Qh
?G4iOiyt
/** $:f.Krj
* @author treeroot tk`: CT *
* @since 2006-2-2 84[|qB,ML
* @version 1.0 457fT|
*/ tXf}jU}
public class SortUtil { 2j8Cv:{Nn%
public final static int INSERT = 1; vQ:x%=]
public final static int BUBBLE = 2; 'v'` F*6
public final static int SELECTION = 3; xNC* ]8d
public final static int SHELL = 4; }': EJ~H
public final static int QUICK = 5; /{fZH,!L
public final static int IMPROVED_QUICK = 6; F3r S6_
public final static int MERGE = 7; 9USrgY6_
public final static int IMPROVED_MERGE = 8; =gW"#ZjL){
public final static int HEAP = 9; YHETI~'j.
W;fH&r)d@
public static void sort(int[] data) { qxf+#
sort(data, IMPROVED_QUICK); ?*CRa$_I|
} sTd}cP
private static String[] name={ &q4ox71
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" /QrA8
}; 'fS?xDs-v
Rz`@N`U
private static Sort[] impl=new Sort[]{ v\fzO#vj
new InsertSort(), gXq!a|eH
new BubbleSort(), kk 8R
new SelectionSort(), t*o7,
new ShellSort(), r> Fec
new QuickSort(), Xy[}Gp
new ImprovedQuickSort(), Z -pyFK\
new MergeSort(), jmRhAJV
new ImprovedMergeSort(), kjx>
new HeapSort() c*.G]nRc
}; D",A$(lG
xM%H~(
public static String toString(int algorithm){ hX0RET
return name[algorithm-1]; nURvy}<r
} y!S^xS
VKT@2HjNT`
public static void sort(int[] data, int algorithm) { V)2"l"Kt
impl[algorithm-1].sort(data); +7Sf8tg\
} zTkFX67)
3sS=?q
public static interface Sort { NV&;e[z
public void sort(int[] data); U^B"|lc:[
} K{|w 43>D
$TR=3[j
public static void swap(int[] data, int i, int j) { :L]-'\y
int temp = data; /pO{2[
data = data[j]; K1;zMh
data[j] = temp; J=@hk@Nq#
} 1T!cc%ah
} Lqg]Fd