[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; H8 xhE~'t
} `PSjkF(
int i1=l; qwO@>wQ}~
int i2=mid+1; NFR>[L V
for(int cur=l;cur<=r;cur++){ h[Uo6`
if(i1==mid+1) ,i8%qm8
data[cur]=temp[i2++]; 5G$5d:[(
else if(i2>r) .8T0OQ4
data[cur]=temp[i1++]; G\B+bBz
else if(temp[i1] data[cur]=temp[i1++]; 4IvT}Us#+
else 7R# }AQ
data[cur]=temp[i2++]; W+$G{XSr5C
} =G"ney2
} o?6m/Klw6
=itQ@``r
} 8m=O408Q
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改进后的归并排序: AWKJ@&pA9m
ou-uZ"$,c
package org.rut.util.algorithm.support; ={+8jQqi1
-3guuT3x\
import org.rut.util.algorithm.SortUtil; "?<h,Hvi
w~ON861
/** CPMGsW^
* @author treeroot YPf?
* @since 2006-2-2 ]vP}K
* @version 1.0 h72CGA|
*/ Vu=/<;-N
public class ImprovedMergeSort implements SortUtil.Sort { | L1+7
'+27_j
private static final int THRESHOLD = 10; qZ&~&f|>e
0!7p5
/* Z#bO}!
* (non-Javadoc) yMTO5~U{
* YRFz]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 4e#$-V
*/ 2#r4dr0
public void sort(int[] data) { k~ByICE
int[] temp=new int[data.length]; T~(Sc'8
mergeSort(data,temp,0,data.length-1); 9dBxCdpu
} [uLsM<C
h /^bRs`;
private void mergeSort(int[] data, int[] temp, int l, int r) { Qh(X7B
int i, j, k; ~!!|#A)W
int mid = (l + r) / 2; $LFL4Q
if (l == r) r[H8;&EL
return; g\ vT7x
if ((mid - l) >= THRESHOLD) 8W?dWj
mergeSort(data, temp, l, mid); *8/Xh)B;
else J}:.I>
insertSort(data, l, mid - l + 1); ~~ rR< re
if ((r - mid) > THRESHOLD) -!:5jfT"
mergeSort(data, temp, mid + 1, r); /:'>-253
else V?1 $H
insertSort(data, mid + 1, r - mid); -p.\fvip
_Uq' N0U
for (i = l; i <= mid; i++) { n=vDEX:'
temp = data; %&| uT
} bAGKi.
for (j = 1; j <= r - mid; j++) { LzNfMvh
temp[r - j + 1] = data[j + mid]; %.<_+V#h
} %dFJ'[jDL
int a = temp[l]; 5;UIz@BJ
int b = temp[r]; }: HG)V
for (i = l, j = r, k = l; k <= r; k++) { ;54NQB3L
if (a < b) { ,_I rE
data[k] = temp[i++]; ~<m^
a = temp; _y_}/
} else { ]A'{DKR
data[k] = temp[j--]; ?<TJ}("/
b = temp[j]; MQ-u9=ys
} R[a-"
} -}|L<~
} V0>X2&.A
6FA+qYSV
/** T8x)i\<
* @param data gHrs|6q9
* @param l 7v ZD
* @param i q"u,Tnc;
*/ H@=oVyn/
private void insertSort(int[] data, int start, int len) { 10Ik_L='
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >.d/@3 '
} w`)5(~b
} ew~Z/ A
} hul,Yd) Z
} &v{#yzM
)8@-
堆排序： F@i>l{C
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package org.rut.util.algorithm.support; -3{Q`@F
^v'kEsE^*
import org.rut.util.algorithm.SortUtil; J:yv82
rexv)!J
/** d m8t~38
* @author treeroot 9\_AB.Z:
* @since 2006-2-2 .N X9Ab
* @version 1.0 mqZH<.mn
*/ .Vbd-jr'M
public class HeapSort implements SortUtil.Sort{ |LZ;2 i
>GGM76vB=,
/* (non-Javadoc) PR%)3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) (,U|H`
*/ yE8D^M|g
public void sort(int[] data) { )QE6X67i
MaxHeap h=new MaxHeap(); xE:jcA d$}
h.init(data); J=` 8
for(int i=0;i h.remove(); NfV|c~?d
System.arraycopy(h.queue,1,data,0,data.length); n/_q
} W"c\/]aD
~T_|?lU`R
private static class MaxHeap{ $hhXsu=
lL)f-8DX
void init(int[] data){ J4T"O<i$58
this.queue=new int[data.length+1]; :#YC_ id
for(int i=0;i queue[++size]=data; Y)sB]!hx
fixUp(size); rl|'.~mc
} ^4n#''wJ
} 0/R;g~q@
^Ps!
private int size=0; ``l*;}
[c,V=:Cq
private int[] queue; //63|;EEkl
wN[lC|1c
public int get() { 1>Sfv|ZP,
return queue[1]; %1i:*~g
} :uCwWv
syl7i>P
public void remove() { pJHdY)Cz
SortUtil.swap(queue,1,size--); }yT/UlU
fixDown(1); I$;`^z
} 6Z_V,LD9L
file://fixdown L$PbC!1
private void fixDown(int k) { 05wkUo:9
int j; !n-Sh<8
while ((j = k << 1) <= size) { ]o] VS
if (j < size %26amp;%26amp; queue[j] j++; AU9C#;JD
if (queue[k]>queue[j]) file://不用交换 "'v+*H 3
break; *:L"#20:R
SortUtil.swap(queue,j,k); \!^=~` X-
k = j; 2.^{4 1:
} |S8$NI2
} z*},N$2=
private void fixUp(int k) { qyRN0ZB"A^
while (k > 1) { "@G[:(BoB<
int j = k >> 1; [icD*N<Gc
if (queue[j]>queue[k]) UT3Fi@
break; @aS)=|Ls\
SortUtil.swap(queue,j,k); 9lq5\ tL-
k = j; |=q~X}DA
} +R*DE5dz
} q1rj!7
$FPq8$V
} l#[Z$+!09
IHEbT
} #L.,aTA<
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SortUtil： O\<zQ2m
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package org.rut.util.algorithm; if&bp ,
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import org.rut.util.algorithm.support.BubbleSort; /b=C
import org.rut.util.algorithm.support.HeapSort; fw&*;az
import org.rut.util.algorithm.support.ImprovedMergeSort; 9dNB_
import org.rut.util.algorithm.support.ImprovedQuickSort; 7T/BzXr,B
import org.rut.util.algorithm.support.InsertSort; BH'*I yv
import org.rut.util.algorithm.support.MergeSort; v]SxZLa
import org.rut.util.algorithm.support.QuickSort; *O[/KR%
import org.rut.util.algorithm.support.SelectionSort; *EuX7LEu_
import org.rut.util.algorithm.support.ShellSort; p$,G`'l
iZNS? ^U
/** 8&EJ.CQ
* @author treeroot =q VT
* @since 2006-2-2 4. R(`#f
* @version 1.0 |Ahf 01
*/ 1{N+B#*<[X
public class SortUtil { uB)q1QQsqp
public final static int INSERT = 1; &5y
public final static int BUBBLE = 2; L-(bw3Yr>
public final static int SELECTION = 3; nXn@|J&z~U
public final static int SHELL = 4; Phi5;U!
public final static int QUICK = 5; v*V(hMy
public final static int IMPROVED_QUICK = 6; Rrh6-]A
public final static int MERGE = 7; eKOEOm+
public final static int IMPROVED_MERGE = 8; Fv]6an.
public final static int HEAP = 9; l73% y
O84:ejro
public static void sort(int[] data) { _#V&rY&@
sort(data, IMPROVED_QUICK); K/zb6=->
} t"B3?<?]
private static String[] name={ G_1r&[N3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" E_~e/y"-
}; bD{tsxm[9
?7fqWlB
private static Sort[] impl=new Sort[]{ 4~Qnhv7
new InsertSort(), y#a,d||N1
new BubbleSort(), 8gavcsVE[
new SelectionSort(), 0U7Gl9~
new ShellSort(), [~8U],?1
new QuickSort(), 'd2 :a2C]
new ImprovedQuickSort(), <TVJ9l
new MergeSort(), X|\`\[
new ImprovedMergeSort(), :;_}Gxx
new HeapSort() B& @ pZYl
}; 81EEYf
,f^fr&6jb
public static String toString(int algorithm){ v7pu
return name[algorithm-1]; (kR NqfX
} Z7bJ<TpZ
?wHhBh-Q
public static void sort(int[] data, int algorithm) { 85!]NF
impl[algorithm-1].sort(data); 7RDmvWd-'?
} H{n:R *
rQl9SUs
public static interface Sort { d0B`5#4
public void sort(int[] data); Y$>NsgQn6
} <-.@,HQ+
sl-wNIQ
public static void swap(int[] data, int i, int j) { ]r#b:W\
int temp = data; i[[.1MnS
data = data[j]; (nO2+@!
data[j] = temp; E"'u2jEG^
} -Kg.w*\H7/
} aB6/-T+u