[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; keFH CC
} e~d=e3mBp
int i1=l; h9/fD5
int i2=mid+1; %"eR0Lj+zq
for(int cur=l;cur<=r;cur++){ ,~DV0#"
if(i1==mid+1) ZvMU3])u
data[cur]=temp[i2++]; um}q@BU
else if(i2>r) I2Imb9k~B
data[cur]=temp[i1++]; Eku9u
else if(temp[i1] data[cur]=temp[i1++]; RB|i<`Z
else s^K2,D]P
data[cur]=temp[i2++]; |0Xf":
} AI`k }sA~
} Ri~$hs!
M&/%qF15
} ?{e}ouKYX1
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改进后的归并排序: g5lb3`a3
;j7G$s9
package org.rut.util.algorithm.support; .6xMLo,R
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import org.rut.util.algorithm.SortUtil; b?c/J{me
U7?v4O]D[
/** *mbzK*
* @author treeroot /R&h#;l
* @since 2006-2-2 Gx6%Z$2n
* @version 1.0 zRou~Kxi
*/ gdA2u;q
public class ImprovedMergeSort implements SortUtil.Sort { =/`]lY&
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private static final int THRESHOLD = 10; (zsv!U
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/* O9ps?{g
* (non-Javadoc) m\X\Xp~A
* RB4 +"QUh
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) h<TZJCt
*/ QS5t~rb
public void sort(int[] data) { (:HT|gKoE
int[] temp=new int[data.length]; +{RTz)e?*
mergeSort(data,temp,0,data.length-1); ;o9ixmT<-o
} 1^^8,.'
gXJBb+P
private void mergeSort(int[] data, int[] temp, int l, int r) { QA*<$v
int i, j, k; e6Y>Bk
int mid = (l + r) / 2; vg1JN"S[
if (l == r) hlB\Xt
return; (+[%^96
if ((mid - l) >= THRESHOLD) ^9:`D@Z+
mergeSort(data, temp, l, mid); eqsmv[
else j~G(7t
insertSort(data, l, mid - l + 1); rpK&OR/
if ((r - mid) > THRESHOLD) yV )fJ_
mergeSort(data, temp, mid + 1, r); 0hV#]`9`gN
else {;u,04OVK
insertSort(data, mid + 1, r - mid); Z$JJ0X
#-<Go'yF
for (i = l; i <= mid; i++) { 4&sf{tI
temp = data; ?'z/S5&j
} CV.|~K0O
for (j = 1; j <= r - mid; j++) { &h5Y_no GX
temp[r - j + 1] = data[j + mid]; fy4zBI@
} Q_|}~4_+
int a = temp[l]; 8c+V$rH_
int b = temp[r]; "(7y%TFt:
for (i = l, j = r, k = l; k <= r; k++) { A*?PH`bY
if (a < b) { d\l{tmte
data[k] = temp[i++]; rB$~,q&.V
a = temp; ,MNv}w@
} else { e,/]]E/o
data[k] = temp[j--]; ZK+F<}
b = temp[j]; jDpA>{O[
} 94BH{9b5
} ={sjoMW
} "!V`_ S;
8qg%>ZU4d
/** jez0 A
* @param data %m\:AK[}
* @param l $jg[6`L$
* @param i Ee2P]4_d
*/ f7~dn#<@
private void insertSort(int[] data, int start, int len) { QQ.?A(U7
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); P'lnS&yA
} #0aBQ+_8H
} tfGs|x
} X$we\t
} WJhTU@'
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堆排序： W3tin3__
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package org.rut.util.algorithm.support; 1fS&KO{a
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import org.rut.util.algorithm.SortUtil; r6Yd"~ n
ly17FLJ].
/** k8+J7(_c
* @author treeroot hhy+bA}
* @since 2006-2-2 id1cZig
* @version 1.0 z/1$G"
*/ =#Sw.N
public class HeapSort implements SortUtil.Sort{ C!*!n^qA
m7'<k1#"Y
/* (non-Javadoc) UJI2L-;Ul
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6MT (k:
*/ MF4(
public void sort(int[] data) { B@&sG 5ES
MaxHeap h=new MaxHeap(); Bdw33z*m
h.init(data); PlzM`g$A
for(int i=0;i h.remove(); ^[xcfTN
System.arraycopy(h.queue,1,data,0,data.length); d^aVP
} P[ :_"4U
OB(oOPH
private static class MaxHeap{ x950,`zy
u]IbTJ'
void init(int[] data){ kWXLncE
this.queue=new int[data.length+1]; Kd5'2"DI
for(int i=0;i queue[++size]=data; wc;n= %
fixUp(size); qg oB}n%
} >>P5 4|&
} <u!cdYo@
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private int size=0; kP ]Up&'
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private int[] queue; mQ:{>`
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public int get() { ;|5-{+2U%
return queue[1]; $9,&BW_*
} LgNIb
GEWjQ;g
public void remove() { )@N d3Z
SortUtil.swap(queue,1,size--); ukSv70Ev
fixDown(1); xQu|D>kv87
} JI5o~;}m
file://fixdown y!#-[K:
private void fixDown(int k) { rL{R=0
int j; N y'\Q"Y]
while ((j = k << 1) <= size) { .T'@P7Hdx
if (j < size %26amp;%26amp; queue[j] j++; CQ!pt@|d
if (queue[k]>queue[j]) file://不用交换 k7CKl;Fck
break; ' P?h?w^T
SortUtil.swap(queue,j,k); faQmkO
k = j; !RI _Uph
} |3'
} 7Z< ~{eD,
private void fixUp(int k) { FDz`U:8
while (k > 1) { G\@pg;0|y
int j = k >> 1; ljKIxSvCFp
if (queue[j]>queue[k]) qiNVaV\wr|
break; g_Z tDxz
SortUtil.swap(queue,j,k); L.HeBeO
k = j; puC91
} :>1nkm&Eg
} ==dKC;
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} YMX9Z||
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} dJ"M#X!Zu
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SortUtil： 4VJUu`[
o!M8V ^vW
package org.rut.util.algorithm; 4Z)s8sDKW
~bLx2=-"
import org.rut.util.algorithm.support.BubbleSort; \R#SoOd
import org.rut.util.algorithm.support.HeapSort; +=3=%%?C
import org.rut.util.algorithm.support.ImprovedMergeSort; 6X \g7bg
import org.rut.util.algorithm.support.ImprovedQuickSort; W;vNmg}mn
import org.rut.util.algorithm.support.InsertSort; = s&Rk~2b/
import org.rut.util.algorithm.support.MergeSort; xa~]t<2
import org.rut.util.algorithm.support.QuickSort; +hyOc|5
import org.rut.util.algorithm.support.SelectionSort; ^m qEKy<
import org.rut.util.algorithm.support.ShellSort; JusU5 e|
}s~c(sL?;
/** Y sM*d
* @author treeroot |b
* @since 2006-2-2 SI}s
* @version 1.0 E/zf9\
*/ r]3-}:vU
public class SortUtil { ]@{Lx>Oh"
public final static int INSERT = 1; my?Ly(#
public final static int BUBBLE = 2; IVR%H_uz
public final static int SELECTION = 3; 23}` e
public final static int SHELL = 4; 9kL,69d2
public final static int QUICK = 5; bv+u7B6,
public final static int IMPROVED_QUICK = 6; ){;XI2
public final static int MERGE = 7; b,xZY1a
public final static int IMPROVED_MERGE = 8; Xh9QfT,
public final static int HEAP = 9; w*qj0:i5as
=XP[3~
public static void sort(int[] data) { kBo:)Vej4
sort(data, IMPROVED_QUICK); nKx)R^]k
} \9?[|m z
private static String[] name={ 5n@YNaoIb
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ]\(8d[4
}; s4|\cY`b-
7r:h_r-
private static Sort[] impl=new Sort[]{ |mEWN/@C
new InsertSort(), MEDh
new BubbleSort(), /F0q8j0
new SelectionSort(), ^""edCs
new ShellSort(), I|@+O#
new QuickSort(), /DQYlNa
new ImprovedQuickSort(), SVCh!/qe\
new MergeSort(), n!jmxl$
new ImprovedMergeSort(), )Qbd/zd\U
new HeapSort() XqTguO'
}; G/_IY;
@oXGa>Ru
public static String toString(int algorithm){ D-gH_ff<]9
return name[algorithm-1]; ')m!48
} jP+yN|
28MMH Q
public static void sort(int[] data, int algorithm) { &2tfj(ms
impl[algorithm-1].sort(data); ?.~1%l!
} &\h7E
98[uRywI
public static interface Sort { B~Sj#(WEa
public void sort(int[] data); &.)=>2
} nS+Rbhs
@Cj!MZ=T
public static void swap(int[] data, int i, int j) { $RD~,<oEm
int temp = data; ?cV,lak
data = data[j]; zm_8a!.
data[j] = temp; feej'l }F
} 2dn^K3
} 7({)ou x