[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; 6@_Vg~=S
} g:bw;6^u
int i1=l; ^M60#gJ
int i2=mid+1; u\gPx4]4c
for(int cur=l;cur<=r;cur++){ n~xh %r;
if(i1==mid+1) dQ+{Dv3A
data[cur]=temp[i2++]; /L,VZ?CmtK
else if(i2>r) `* !t<?$i
data[cur]=temp[i1++]; 6X{RcX]/
else if(temp[i1] data[cur]=temp[i1++]; .s7Cr0^k,|
else sG{hUsPa
data[cur]=temp[i2++]; [hU5ooB
} VY }?Nb<&
} Y/Yp+W6n
?rqU&my S
} bN-ljw0&
I6}ineps
改进后的归并排序: p7y8/m\6
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package org.rut.util.algorithm.support; mup<%@7m
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import org.rut.util.algorithm.SortUtil; =#qf0
Vm NCknG
/** ?`%7Y~
* @author treeroot >*v!2=
* @since 2006-2-2 IN2FO/Y@
* @version 1.0 ZujPk-
*/ P)he3
public class ImprovedMergeSort implements SortUtil.Sort { x5/O.5>f
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private static final int THRESHOLD = 10; 9Tbi_6[
F)x^AJie
/* <0!/7*;#ZT
* (non-Javadoc) fg1_D
* rap`[O|l=
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8t3,}}TJ
*/ "0al"?
public void sort(int[] data) { R<>ptwy
int[] temp=new int[data.length]; }lZfZ?oAz
mergeSort(data,temp,0,data.length-1); k`H#u,&
} v6B}ov[Y2
3=(Gb
private void mergeSort(int[] data, int[] temp, int l, int r) { (gd+-o4
int i, j, k; hVPSW# .d
int mid = (l + r) / 2; uH'n.d"WG
if (l == r) tY=sl_
return; U#3Y3EdF<
if ((mid - l) >= THRESHOLD) gp Aqz Y
mergeSort(data, temp, l, mid); O=c^Ak
else 8P8@i+[]W
insertSort(data, l, mid - l + 1); 0'ha!4h3Z
if ((r - mid) > THRESHOLD) 9/N=7<$
mergeSort(data, temp, mid + 1, r); Hk)IV"[R
else w#EP`aM2$=
insertSort(data, mid + 1, r - mid); |y+<|fb,a
'urn5[i
for (i = l; i <= mid; i++) { Jr/|nhGl5
temp = data; 4N&4TUIM
} te e
for (j = 1; j <= r - mid; j++) { 'xO5Le(=M
temp[r - j + 1] = data[j + mid]; >U/m/H'
} #sLyU4QV
int a = temp[l]; )%D2JC
int b = temp[r]; Qs(WyP#
for (i = l, j = r, k = l; k <= r; k++) { 04eE\%?
if (a < b) { . e' vc
data[k] = temp[i++]; $f`\TKlN
a = temp; s?h=%;T[
} else { ~/0t<^
data[k] = temp[j--]; IBYRuaEB
b = temp[j]; (7 i@@
} ,'~8{,h5
} }%z {tn
} px!lJtvgo
yHS=8!
/** tBSHMz
* @param data 9H$$Og
* @param l k"-2OT
* @param i V-Ebi^gz5W
*/ # fvt:iE
private void insertSort(int[] data, int start, int len) { 6|q\ M
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); )m .KV5K!
} US<bM@[
} 0<3)K[m~H
} b(<#n6a}\
} q}vz]L&o
[~cb&6|M
堆排序： 3N8RZt1.b
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package org.rut.util.algorithm.support; j*uc$hC"
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import org.rut.util.algorithm.SortUtil; 7g'jg7
G&i<&.i
/** B&J;yla6`d
* @author treeroot :G+8%pUX]
* @since 2006-2-2 fJ \bm
* @version 1.0 $]eU'!2)
*/ [T8BQn!
public class HeapSort implements SortUtil.Sort{ [ 0?*J<d
<=m@Sg{o
/* (non-Javadoc) ySyA!Z
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @=@7Uu-
*/ a`]Dmw8@
public void sort(int[] data) { BEn,py7
MaxHeap h=new MaxHeap(); yb)!jLnH
h.init(data); tqdw y.
for(int i=0;i h.remove(); ]w2nVC3
System.arraycopy(h.queue,1,data,0,data.length); 4`(b(DL]
} fQZ,kl
yk1.fxik'
private static class MaxHeap{ AcF6p)@_
N7/eF9
void init(int[] data){ 1A>>#M=A
this.queue=new int[data.length+1]; $LxfdSa
for(int i=0;i queue[++size]=data; ;MD6iBD
fixUp(size); GEJEhwO;H
} CxyL'k
} 4~;x(e@S
s*A#;
private int size=0; rnB-e?>
DEmU},<S
private int[] queue; <B,z)c
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public int get() { aZK%?c
return queue[1]; ko-:)z
} $w,&h:.p
85$W\d
public void remove() { ``l7|b jJ
SortUtil.swap(queue,1,size--); (_2;}eg
fixDown(1); )_$F/ug
} )`u)#@x
file://fixdown u 3&9R)J1
private void fixDown(int k) { 3vs;ZBM
int j; zq(R!a6
while ((j = k << 1) <= size) { Q&p'\6~
if (j < size %26amp;%26amp; queue[j] j++; Aw]W-fx
if (queue[k]>queue[j]) file://不用交换 Dwvd
break; pq<302uBQ
SortUtil.swap(queue,j,k); 3v oas
k = j; )~((6?k4e
} xp+Z%0D
} (`z`ni
private void fixUp(int k) { . 4$SNzv3V
while (k > 1) { R?,Oh*
int j = k >> 1; %<4ZU!2L
if (queue[j]>queue[k]) eVDO]5?
break; "qb1jv#to
SortUtil.swap(queue,j,k); "RZVv~BD
k = j; >5,nB<
} F(?A7
} Ne6]?\Z
m1](f[$
} !uoQLiH+
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} R]s\s[B
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SortUtil： A,P_|
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package org.rut.util.algorithm; v,=[!=8!
Sr9)i8x{
import org.rut.util.algorithm.support.BubbleSort; (JgW")M`cY
import org.rut.util.algorithm.support.HeapSort; |zJxR_)
import org.rut.util.algorithm.support.ImprovedMergeSort; \wyn
import org.rut.util.algorithm.support.ImprovedQuickSort; Y,?!"
import org.rut.util.algorithm.support.InsertSort; t[L_n m5-
import org.rut.util.algorithm.support.MergeSort; *5kQ6#l
import org.rut.util.algorithm.support.QuickSort; `cz%(Ry,
import org.rut.util.algorithm.support.SelectionSort; f3g#(1
import org.rut.util.algorithm.support.ShellSort; uQ}0hs
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/** sHt PO[h
* @author treeroot ;8?i
* @since 2006-2-2 ~v /NG
* @version 1.0 R<5GG|(B
*/ s,tZi6Z=%E
public class SortUtil { ]bPj%sb*@
public final static int INSERT = 1; 1XwW4cZ>:
public final static int BUBBLE = 2; ]VYv>o`2
public final static int SELECTION = 3; R')D~JJ<8a
public final static int SHELL = 4; O%w"bEr)N
public final static int QUICK = 5; b1("(,r/`
public final static int IMPROVED_QUICK = 6; <c,/+ lQ^
public final static int MERGE = 7; .e^AS~4pl
public final static int IMPROVED_MERGE = 8; (%i)A$i6a
public final static int HEAP = 9; c h_1-
yMJY6$Ct
public static void sort(int[] data) { k|ol+ 9Z
sort(data, IMPROVED_QUICK); cz2guUu
} ,b&-o?.{
private static String[] name={ I3{koI
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 1l8kuwH
}; dG}.T_l
SkmLX@:(
private static Sort[] impl=new Sort[]{ Hy?+p{{G
new InsertSort(), JTK0#+?
new BubbleSort(), #[4MwM3
new SelectionSort(), VcLB0T7m\
new ShellSort(), 01/?
new QuickSort(), 4yk!T
new ImprovedQuickSort(), x/7d!>#;
new MergeSort(), P ~pC /z
new ImprovedMergeSort(), &ye,A(4
new HeapSort() wRc=;f
}; oicj3xkw?
+[=yLE#P%
public static String toString(int algorithm){ ;yc|=I^
return name[algorithm-1]; Tb2Tb2C
} RR%[]M#_T
BQs~>}(V
public static void sort(int[] data, int algorithm) { isdEs k#A.
impl[algorithm-1].sort(data); Z[(V0/[]
} kpe7\nd=>
m((A
public static interface Sort { D<.zdTo
public void sort(int[] data); !uC`7a
} }G:5P3f
+cDz`)N,,
public static void swap(int[] data, int i, int j) { ^kS44pr\Q
int temp = data; R)%1GG4
data = data[j]; yf2I%\p}
data[j] = temp; 5i 6*$#OM_
} K*ZH<@o4
} +npcU:(Kg