[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; MuSaK %
} ^uBwj}6
int i1=l; 1jOKcm'#
int i2=mid+1; FU]4oKx
for(int cur=l;cur<=r;cur++){ "8t\MKt(
if(i1==mid+1) /W9 &Ke
data[cur]=temp[i2++]; .v7`$(T
else if(i2>r) :1BM=_WwI
data[cur]=temp[i1++]; ,|x\MHd?t_
else if(temp[i1] data[cur]=temp[i1++]; <[8@5?&&
else tJ1-DoU
data[cur]=temp[i2++]; xvO 3BU~2
} z.59]\;U>
} /d]~ly @uI
u[mY!(>nQ
} GXEcpc08
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改进后的归并排序: :tlE`BIp
(. H]|
package org.rut.util.algorithm.support; ;r@!a!NLB
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import org.rut.util.algorithm.SortUtil; %ph"PR/t?
/.2u.G
/** Dpj-{q7C
* @author treeroot RK;;b~
* @since 2006-2-2 n\*JaY
* @version 1.0 _]EyEa
*/ )DRkS,I
public class ImprovedMergeSort implements SortUtil.Sort { R%W@~o\p]
,M{Q}:$+4
private static final int THRESHOLD = 10; vh{9'vd3el
p70,\&@3
/* Dx0O'uwR
* (non-Javadoc) RCCv>o
* ${@q?iol
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) BP:(IP!&
*/ qdO[d|d
public void sort(int[] data) { Q-jf8A]
int[] temp=new int[data.length]; fIH#
mergeSort(data,temp,0,data.length-1); &h\CS8nT%
} ?^Pq/VtZ
Q;Q%SI`yT
private void mergeSort(int[] data, int[] temp, int l, int r) { s`r-v/3l
int i, j, k; =9fEv,Jk
int mid = (l + r) / 2; W?=$V>)
if (l == r) /M]eZ~QKD
return; =hPG_4#
if ((mid - l) >= THRESHOLD) Y\Fuj)
mergeSort(data, temp, l, mid); :Olj
else [#H8=
insertSort(data, l, mid - l + 1); =$:4v`W0(
if ((r - mid) > THRESHOLD) 18[?dV
mergeSort(data, temp, mid + 1, r); d\1:1ucV
else i9#`F.7F
insertSort(data, mid + 1, r - mid); 0ER6cTo-t
-r6(=A
for (i = l; i <= mid; i++) { ;X9MA=b
temp = data; I&Eg-96@
} erAZG)
for (j = 1; j <= r - mid; j++) { } (GQDJp
temp[r - j + 1] = data[j + mid]; ;GSfN
} {ra Esb-X
int a = temp[l]; H|(*$!~e
int b = temp[r]; I'6ed`|
for (i = l, j = r, k = l; k <= r; k++) { Eo25ir%
if (a < b) { #!<+:y'S?
data[k] = temp[i++]; -Z\UYt
a = temp; j*3sjOoC
} else { V)@nRJg
data[k] = temp[j--]; +Fkx")
b = temp[j]; ZQ-z2s9U
} `rOe5Zp$
} `OF;>u*:
} $F /p8AraK
SqT"/e]b'
/** 'Rar>oU
* @param data EC\rh](d 1
* @param l |L~gNC
* @param i ={&TeMMA
*/ n(F<
private void insertSort(int[] data, int start, int len) { y(p:)Iv
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ogh2kht
} ]cO$E=W
} A~~|X
} @v:ILby4-
} {(zL"g46
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堆排序： A_4\$NZ^
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package org.rut.util.algorithm.support; 1>O0Iu
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import org.rut.util.algorithm.SortUtil; G%x,t-
"N[gMp6U
/** TJGKQyG$L
* @author treeroot \Jj'60L^
* @since 2006-2-2 *dn-,Q%`
* @version 1.0 ,r)d#8
*/ P$#}-15?|_
public class HeapSort implements SortUtil.Sort{ _ER cmP
(UiH3Q9C]%
/* (non-Javadoc) )~o`QM+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) o@V/37!
*/ MrygEC 5
public void sort(int[] data) { l#(g&x6J
MaxHeap h=new MaxHeap(); ~TmHnAz
h.init(data); u/{_0-+P
for(int i=0;i h.remove(); h"%,eW|^
System.arraycopy(h.queue,1,data,0,data.length); }v|[h[cZ
} Jv$2wH
uC$4TnoQx.
private static class MaxHeap{ XzRWY\x
j?` D\LZhf
void init(int[] data){ &cv/q$W4
this.queue=new int[data.length+1]; IU"!oM^
for(int i=0;i queue[++size]=data; <P)%Ms
fixUp(size); LAjw!QB
} tYxlM!
} B 0fo[Ev
Y&Nv>o_}5
private int size=0; hFF&(t2{^
dodz|5o%
private int[] queue; kJ:5msKwC
!c;p4B)
public int get() { K^p"Z$$
return queue[1]; 6Yi,%#
} /?<9,7#i
|@4hz9~3
public void remove() { Czl 8Q oH
SortUtil.swap(queue,1,size--); I,q~*d
fixDown(1); #B{F{,vlu,
} <L[)P{jn?p
file://fixdown ~1z8G>R
private void fixDown(int k) { 8XXTN@&,
int j; A7}|VV
while ((j = k << 1) <= size) { T%b^|="@
if (j < size %26amp;%26amp; queue[j] j++; Y+PxV*"a
if (queue[k]>queue[j]) file://不用交换 %JU23c*
break; |6G5 ?|
SortUtil.swap(queue,j,k); 8&AorYw[
k = j; iw6M3g#
} W;*vcbP
} &?6~v
private void fixUp(int k) { ojI"<Q~g
while (k > 1) { Nr7.BDA
int j = k >> 1; MjosA R
if (queue[j]>queue[k]) w4/)r-Z4I
break; ZI*A0_;L
SortUtil.swap(queue,j,k); =<tEc+!T3
k = j; (9QRg;
} [?(W7
} \YyU5f7';
@)Y7GM+^
} ]nGA1S{
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} aYX'&k `
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SortUtil： `t"Kq+
6:X\vw
package org.rut.util.algorithm; S5p\J!k\B
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import org.rut.util.algorithm.support.BubbleSort; %5w)}|fw
import org.rut.util.algorithm.support.HeapSort; |W[rywxx
import org.rut.util.algorithm.support.ImprovedMergeSort; BAed [
import org.rut.util.algorithm.support.ImprovedQuickSort; FC.-u"V
import org.rut.util.algorithm.support.InsertSort; X0L{#U
import org.rut.util.algorithm.support.MergeSort; ?XrTZ{5'
import org.rut.util.algorithm.support.QuickSort; 'GT`%ck
import org.rut.util.algorithm.support.SelectionSort; ;\0RXirk
import org.rut.util.algorithm.support.ShellSort; uU"s50m
JB}h}nb
/** }z:=b8}
* @author treeroot 09i[2n;O
* @since 2006-2-2 {[iQRYD0|
* @version 1.0 "Vy\-^
*/ #J9XcD{1
public class SortUtil { At:C4>HE@
public final static int INSERT = 1; !9Ni[8&Fg0
public final static int BUBBLE = 2; "aH]4DO
public final static int SELECTION = 3; )^3655mb
public final static int SHELL = 4; [X\2U4
public final static int QUICK = 5; fQ) ;+
public final static int IMPROVED_QUICK = 6; gDIB'Y
public final static int MERGE = 7; .v!e=i}.
public final static int IMPROVED_MERGE = 8; epe}^Pl
public final static int HEAP = 9; pm|]GkM
QJ'C?hn
public static void sort(int[] data) { Nzt1JHRS
sort(data, IMPROVED_QUICK); }x-8@9S~z
} "=O)2}
private static String[] name={ ^4i3#}
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" \`&fr+x
}; ru Lcu]
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private static Sort[] impl=new Sort[]{ Gd 9B
new InsertSort(), }2"k:-g
new BubbleSort(), S6I8zk)Z4
new SelectionSort(), n_Dhq(.
new ShellSort(), Nq3P?I(<
new QuickSort(), %hh8\5l.:
new ImprovedQuickSort(), 0SYkDI
new MergeSort(), Fh;(1X75I
new ImprovedMergeSort(), .`9KB3
new HeapSort() S{06bLXU"
}; n9yxZu
^}#!?"Y
public static String toString(int algorithm){ J.(_c' r
return name[algorithm-1]; ml2HA4X&$Y
} ~heF0C_
!h~\YE)
public static void sort(int[] data, int algorithm) { {I ,'
impl[algorithm-1].sort(data); I._=q
} X"sN~Q.0
WF7RMQ51j
public static interface Sort { ]Ea6Z
public void sort(int[] data); <Lt$qV-#
} xUUp?]9y
hb{(r@[WHv
public static void swap(int[] data, int i, int j) { g& Rk}/F
int temp = data; YDwns
data = data[j]; ,??|R`S
data[j] = temp; @\a- =
} |qD<h
} *gnL0\*