[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; S\s1}`pNm
} ]p@7[8}
int i1=l; o+q4Vg9&
int i2=mid+1; x^9W<
for(int cur=l;cur<=r;cur++){ NuW9.6$Jrf
if(i1==mid+1) 2}'&38wMT
data[cur]=temp[i2++]; RhXX/HFk
else if(i2>r) LKftNSkg"
data[cur]=temp[i1++]; }=;N3Q" #y
else if(temp[i1] data[cur]=temp[i1++]; s%;18V:pi
else x>p=1(L
data[cur]=temp[i2++]; jHTaG%oh
} s XRiUDP`
} C`7HC2Is
6HFA2~A
} bG;vl;C
l*xA5ObV
改进后的归并排序: u*}6)=+:
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package org.rut.util.algorithm.support; Z9 }qds6 y
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import org.rut.util.algorithm.SortUtil; q$~S?X5\
Fu!:8Wp!(
/** $A8eMJEpL
* @author treeroot )"=BbMfhu
* @since 2006-2-2 r]" >
* @version 1.0 hFyN|Dqhds
*/ }DY^a'wJ-
public class ImprovedMergeSort implements SortUtil.Sort { boJQ3Xc
Su-LZ'C\
private static final int THRESHOLD = 10; NS mo(c>5
!\RR UH*
/* ^4c2}>f
* (non-Javadoc) `Nc3I\tCM
* kVe}_[{m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) l4v)tV~
*/ %[&cy'
public void sort(int[] data) { 2lE { P
int[] temp=new int[data.length]; 64o`7
mergeSort(data,temp,0,data.length-1); Td X6<fVV
} >LwAG:Ud
-L</,>p
private void mergeSort(int[] data, int[] temp, int l, int r) { cD-\fRBGK
int i, j, k; Vy&F{T;$
int mid = (l + r) / 2; >")%4@
if (l == r) C[_{ $j(J
return; |#f P8OK
if ((mid - l) >= THRESHOLD) X7Cou6r
mergeSort(data, temp, l, mid); %[Ia#0'Y@
else ~u/Enl7\-
insertSort(data, l, mid - l + 1); jKM-(s!(
if ((r - mid) > THRESHOLD) VDCrFZ!]
mergeSort(data, temp, mid + 1, r); *M6M'>Tin
else KvkiwO(
insertSort(data, mid + 1, r - mid); E':y3T@."
(~zdS.
for (i = l; i <= mid; i++) { nu4GK}xI
temp = data; H /*^$>0Uo
} ?gH[tN:=
for (j = 1; j <= r - mid; j++) { 0JKbp*H
temp[r - j + 1] = data[j + mid]; /p?h@6h@y
} R8O<}>3a
int a = temp[l]; ~$YFfv>
int b = temp[r]; gXc&uR0S
for (i = l, j = r, k = l; k <= r; k++) { I`p44}D3
if (a < b) { b;Q cBGwKT
data[k] = temp[i++]; (:vY:-\ bO
a = temp; w9H%u0V?
} else { 3Akb|r
data[k] = temp[j--]; '?wv::t
b = temp[j]; 2gg5:9
} F#O.i,
} ^L*:0P~
} FwmE1,
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/** lf[(
* @param data gj$gqO`B
* @param l PHT;%;m=
* @param i [{f{E
*/ &z&Jl#t-)
private void insertSort(int[] data, int start, int len) { y85GKysT
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); &*T57tE
} s <Ag8U8
} oC^-" (#
} rM_8piD
} ^mkplp a
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堆排序： |!flR? OU
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package org.rut.util.algorithm.support; 11%^K=dq
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import org.rut.util.algorithm.SortUtil; !NZFo S~
pU<->d;->
/** I>C;$Lp]
* @author treeroot L+9a4/q
* @since 2006-2-2 +Y'(,J
* @version 1.0 +c+#InsY
*/ ~~&8I!r e
public class HeapSort implements SortUtil.Sort{ H [R|U
^Me__Y
/* (non-Javadoc) ,d&~#W]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) RVlC8uJ;P
*/ MJ4+|riB
public void sort(int[] data) { oypX.nye_
MaxHeap h=new MaxHeap(); bUU_NqUf*3
h.init(data); `+Wl fk;
for(int i=0;i h.remove(); . p<*n6E
System.arraycopy(h.queue,1,data,0,data.length); jbMzcn~ehI
} pn{Nk1Pl
`hY%<L sI
private static class MaxHeap{ %h2U(=/:
1g^N7YF
void init(int[] data){ 87r#;ND
this.queue=new int[data.length+1]; X<vv:
for(int i=0;i queue[++size]=data; %dhnp9'
fixUp(size); X3<<f`X
} Ycn*aR2
} n;/yo~RR
)Uo)3FAn
private int size=0; wRi!eN?
-]A,SBs
private int[] queue; GbBcC#0
w)5eD+n\-
public int get() { u4rGe!
return queue[1]; 'HH[[9Q
} zxT&K|
u\Tq5PYXt
public void remove() { SHIK=&\~-
SortUtil.swap(queue,1,size--); e#<%`\qH
fixDown(1); ikw_t?
} O{%yO=`r
file://fixdown 4$@5PS#,
private void fixDown(int k) { <x53b/ft
int j; [?.k8;k
while ((j = k << 1) <= size) { r@/+
if (j < size %26amp;%26amp; queue[j] j++; |z-A;uL<
if (queue[k]>queue[j]) file://不用交换 v0apEjT
break; &3:-(:<U
SortUtil.swap(queue,j,k); '>@evrG
k = j; roVGS{4T\
} B24wn8<
} |36d<b Io
private void fixUp(int k) { >E^sZmY[f-
while (k > 1) { ri.;&
int j = k >> 1; Oz-X}eM
if (queue[j]>queue[k]) jLM1~`&
break; Dc}-wnga
SortUtil.swap(queue,j,k); q~T*R<S
k = j; !Hr~B.f7
} &?#V*-;^
} '[I?G6
69p>?zn
} OtBVfA:[
g;UB+Y 247
} %8DU}}Rj
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SortUtil： Xt_8=Q
9NBFG~)|l[
package org.rut.util.algorithm; tux/@}I
6:fe.0H9
import org.rut.util.algorithm.support.BubbleSort; @_J~zo
import org.rut.util.algorithm.support.HeapSort; P>9F(#u_(F
import org.rut.util.algorithm.support.ImprovedMergeSort; MRV4D<NQ
import org.rut.util.algorithm.support.ImprovedQuickSort; L 1H!o!*
import org.rut.util.algorithm.support.InsertSort; |~Z.l
import org.rut.util.algorithm.support.MergeSort; 0L S,(v4
import org.rut.util.algorithm.support.QuickSort; 3-`IMNn!
import org.rut.util.algorithm.support.SelectionSort; ; {iX_%
import org.rut.util.algorithm.support.ShellSort; y U =) g
TMpV.iH
/** 1I{vBeMj
* @author treeroot ; $i{>mDT
* @since 2006-2-2 zogw1g&C
* @version 1.0 hs!a'E
*/ &5h{XSv
public class SortUtil { o:W>7~$jr=
public final static int INSERT = 1; nQy.?*X
public final static int BUBBLE = 2; idPx! fe
public final static int SELECTION = 3; A,Wwt [Qw
public final static int SHELL = 4; ;6KcX\g-
public final static int QUICK = 5; "v@Y[QI
public final static int IMPROVED_QUICK = 6; NTbmI$(
public final static int MERGE = 7; %M]%[4eC
public final static int IMPROVED_MERGE = 8; ="Zr.g~8
public final static int HEAP = 9; W8z4<o[$
O3/][\
public static void sort(int[] data) { a\pOgIp
sort(data, IMPROVED_QUICK); 'y[74?1
} ($pNOGH
private static String[] name={ ;|}N\[fk%]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ^~9fQJNs
}; SR!EQ<
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private static Sort[] impl=new Sort[]{ -K eoq
new InsertSort(), z6)b XL[f
new BubbleSort(), *:gx1wd
new SelectionSort(), t~]n"zgovz
new ShellSort(), rofj&{w
new QuickSort(), `u$ Rd
new ImprovedQuickSort(), H=RzY-\a%
new MergeSort(), LeRyS]
new ImprovedMergeSort(), 3`.*~qW
new HeapSort() Z}#'.y\ f
}; zisf8x7^W
.ZQD`SRrI
public static String toString(int algorithm){ "{(|}Cds
return name[algorithm-1]; Q6)Wh6Cm
} 1yC_/Va1
gB|>[6
public static void sort(int[] data, int algorithm) { -FpZZ8=,M2
impl[algorithm-1].sort(data); -@L7!,j
} =z^2KH
m#1>y}
public static interface Sort { !xk`oW
public void sort(int[] data); .8e]-^Z
} ])OrSsV}
P1C{G'cR
public static void swap(int[] data, int i, int j) { (KxI*
int temp = data; C# zYZ JZ
data = data[j]; 'F2g2W`
data[j] = temp; =r|e]4
} ;>hRj!
} corNw+|/w