[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; 5yd MMb
} p)jk>j B
int i1=l; rV2WnAb[H&
int i2=mid+1; :y+2*lV
for(int cur=l;cur<=r;cur++){ ]s]vZ
if(i1==mid+1) RmI]1S_=
data[cur]=temp[i2++]; { d=^}-^
else if(i2>r) iJ-23_D
data[cur]=temp[i1++]; 2a-w% (K
else if(temp[i1] data[cur]=temp[i1++]; |nc@"OJ
else I&2c&yO
data[cur]=temp[i2++]; IshKH-
} Vy6qbC-Kt
} VyXKZ%\dQ/
4;w;'3zq
} "7 4-4
dz:E?
改进后的归并排序: h:W;^\J:-
V_R@o3kv;
package org.rut.util.algorithm.support; xR-%L
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import org.rut.util.algorithm.SortUtil; [glLre^
35A|BD)q
/** 5-|:^hU9
* @author treeroot ,-$LmECg
* @since 2006-2-2 ,g%0`SO
* @version 1.0 4qO+_!x{)
*/ GOj-)i/_
public class ImprovedMergeSort implements SortUtil.Sort { ot,jp|N>f~
&4{KV.
private static final int THRESHOLD = 10; <Q3oT
RU'=ERYC
/* Pj[PIz
* (non-Javadoc) fX(3H1$"
* {'NZ.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p09HL%~R
*/ 3r<~Q7e
public void sort(int[] data) { ^?-:'<4q$
int[] temp=new int[data.length]; V39g,=`b%
mergeSort(data,temp,0,data.length-1); 5 f@)z"j
} 4~ q5,^kgB
/1Qr#OJ(]
private void mergeSort(int[] data, int[] temp, int l, int r) { &VhroHO
int i, j, k; ]S&&|Fc
int mid = (l + r) / 2; i)o2klIkB
if (l == r) ."TxX.&HE
return; J &o|QG
if ((mid - l) >= THRESHOLD) h2)yq:87
mergeSort(data, temp, l, mid); e h&IPU S
else T]R|qlZ
insertSort(data, l, mid - l + 1); xj<Rp|7&
if ((r - mid) > THRESHOLD) Um}
mergeSort(data, temp, mid + 1, r); OPetj.C/a
else %G3h?3
insertSort(data, mid + 1, r - mid); FGPB:
m-%E-nr
for (i = l; i <= mid; i++) { wa(8Hl|Y
temp = data; '@cANGg7[
} xVf|G_5$
for (j = 1; j <= r - mid; j++) { 6 +Sxr
temp[r - j + 1] = data[j + mid]; z F_M*8=
} BIb4h
int a = temp[l]; $Ad{Z
int b = temp[r]; N@;?CKU
for (i = l, j = r, k = l; k <= r; k++) { KLU-DCb%
if (a < b) { jPC[_g
data[k] = temp[i++]; 9V'%<pk''(
a = temp; Eou~P h*t
} else { ~<P 0]ju
data[k] = temp[j--]; a[v0%W ]u
b = temp[j]; .0p0_f=
} ZWii)0'PV
} R]Vt Y7}i,
} z(o,m3@v
O ~(pg
/** 9TU88]
* @param data 1;d$#j
* @param l E_gD:PPU5
* @param i t![7uU.W
*/ Qf58ig-vCY
private void insertSort(int[] data, int start, int len) { 2{M^,=^>
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); VGLaN%|
} t$+?6E
} @M<|:Z %.@
} yTyj'-4
} x9NEFtqjm
".f ;+wH
堆排序： [N FFB96
iF*:d
package org.rut.util.algorithm.support; LO'**}vm
-Q2, "
import org.rut.util.algorithm.SortUtil; Bm.afsM;
F^l[GdUosK
/** Y4%:7mw~=
* @author treeroot DDvh4<Hk
* @since 2006-2-2 sJ\BF
* @version 1.0 ke{8 ^X~#
*/ S,D8F&bg
public class HeapSort implements SortUtil.Sort{ "lQ*1.i
?M$.+V{a
/* (non-Javadoc) 3NZK*!@'
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s|@6S8E
*/ -)s qc P
public void sort(int[] data) { KTK <gV9:
MaxHeap h=new MaxHeap(); (w&F/ynO:
h.init(data); %/EVUN9=
for(int i=0;i h.remove(); /TE_W@?^
System.arraycopy(h.queue,1,data,0,data.length); |HU@ >
} .R`5Qds*l
)js)2L~
private static class MaxHeap{ #XK2Ien)Z
M-\Y"]sW
void init(int[] data){ ?=>+LqP
this.queue=new int[data.length+1]; Ytgcs( /$
for(int i=0;i queue[++size]=data; $r@ =*(
fixUp(size); R[Ll59-
} :#2Bw]z&z
} eeIhed9
|].pDwgt
private int size=0; })uGRvz
$GYm6x\4
private int[] queue; ko1J094Y%
0,r}o
public int get() { tzZ63@cm
return queue[1]; PiYY6i0
} 6\L0mcXR!
z25lZI" X`
public void remove() { %?LOs H
SortUtil.swap(queue,1,size--); aGK?x1_
fixDown(1); @*>@AFnf\Z
} )@N2
file://fixdown ^<;V]cY`
private void fixDown(int k) { ,_|]Ufr!a
int j; hp8%.V$f
while ((j = k << 1) <= size) { f6|KN+.
if (j < size %26amp;%26amp; queue[j] j++; Vw[6t>`
if (queue[k]>queue[j]) file://不用交换 l;af~ef)'
break; Ok>gh2e[c
SortUtil.swap(queue,j,k); '"y|p+=j:
k = j; o5xAav"+>
} `))\}C@k
} H|,Oswk~-
private void fixUp(int k) { zG+R5:
while (k > 1) { 33jovK2
int j = k >> 1; >Wh}f3C
if (queue[j]>queue[k]) U QE qX
break; vQ<90ZxqB
SortUtil.swap(queue,j,k); %509\;el
k = j; zs%Hb48V
} vesJEaw7
} L{:9Cx!F
?P4w]a
} YiYV>gaf"H
vK(i9>;7
} lW<PoT
|4 v0:ETb$
SortUtil： -DxL0:E
-<Hu!V`+
package org.rut.util.algorithm; C(S'#cm
1<+2kBuY
import org.rut.util.algorithm.support.BubbleSort; kR]!Vr*yh
import org.rut.util.algorithm.support.HeapSort; ?!wgH9?8
import org.rut.util.algorithm.support.ImprovedMergeSort; 'jmTXWq*
import org.rut.util.algorithm.support.ImprovedQuickSort; "dsU>3u
import org.rut.util.algorithm.support.InsertSort; } $uxJB
import org.rut.util.algorithm.support.MergeSort; }>)@WL:q
import org.rut.util.algorithm.support.QuickSort; lJ+0P2@h*
import org.rut.util.algorithm.support.SelectionSort; x8!ol2\`<
import org.rut.util.algorithm.support.ShellSort; 9k9_mjLZ
RZ6xdq}>
/** QF-LU
* @author treeroot UUF;p2{f
* @since 2006-2-2 ub7zA!%
* @version 1.0 6UevpDB
*/ df*5,NV'-*
public class SortUtil { iQ4);du
public final static int INSERT = 1; cKN$ =gd
public final static int BUBBLE = 2; ex+\nD>t4
public final static int SELECTION = 3; o]Ol8I
public final static int SHELL = 4; xO1[>W
public final static int QUICK = 5; 1mfs4
public final static int IMPROVED_QUICK = 6; Qhs/E`k4
public final static int MERGE = 7; uMut=ja(U
public final static int IMPROVED_MERGE = 8; /D5`
public final static int HEAP = 9; ;=geHiQHA
I+Jm>XN
public static void sort(int[] data) { L,SGT8lL
sort(data, IMPROVED_QUICK); dcLA1sN,
} k4,BNJt'Z
private static String[] name={ ?6(I V]
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" UJ0<%^f
}; rm4.aO~-F
vy_D>tp
private static Sort[] impl=new Sort[]{ '7D,m H
new InsertSort(), 4%2~Wi8
new BubbleSort(), !l|5z G
new SelectionSort(), cZH-"
new ShellSort(), XQ%?
new QuickSort(), 4 SHU
new ImprovedQuickSort(), Rop'e8Q
new MergeSort(), 8%%f%y
new ImprovedMergeSort(), .~Fp)O:!
new HeapSort() TlI<1/fP}
}; Rp*R:3 C
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public static String toString(int algorithm){ %YSpCI
return name[algorithm-1]; ?q(\=;Y
} &ZghMq~
`6 /$M!4$
public static void sort(int[] data, int algorithm) { XO-Prs
impl[algorithm-1].sort(data); u$*56y
} fGw^:,B
6An9S%:_
public static interface Sort { chV9_(8
public void sort(int[] data); 6el;Erp
} fMGbODAvY
cE`6uq7p
public static void swap(int[] data, int i, int j) { vo\fUT@k
int temp = data; 2-=\~<)
data = data[j]; j<2m,~k`V
data[j] = temp; N2oRJ,:B
} {GKy'/[
} $&$w Y/F