[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; zx\-He
} = >TU
int i1=l; q9ra
int i2=mid+1; 5"57F88Y1
for(int cur=l;cur<=r;cur++){ +5|k#'%5
if(i1==mid+1) PV~D;
data[cur]=temp[i2++]; nsi?.c&0!
else if(i2>r) OjlX<y.
data[cur]=temp[i1++]; E%v0@
else if(temp[i1] data[cur]=temp[i1++]; [nVBnB
else U'" #jT
data[cur]=temp[i2++]; [#@lsI
} qtAt=` s
} `W)?d I?#M
1ds4C:M+<
} 4pT^*
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改进后的归并排序: zC)JOykI%
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package org.rut.util.algorithm.support; |T"vF`Kr(>
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import org.rut.util.algorithm.SortUtil; Iv
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/** "A Bt
* @author treeroot &)Qq%\EP4
* @since 2006-2-2 #OM'2@
* @version 1.0 MCibYvc[
*/ [Y*>x2X
public class ImprovedMergeSort implements SortUtil.Sort { Rjq\$aY}%
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private static final int THRESHOLD = 10; dI%jR&.e;
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/* kI(3Pf].
* (non-Javadoc) /YZMP'v
* Co(N8>1
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Wm-$l
*/ F%p DF\
public void sort(int[] data) { ["&{^
int[] temp=new int[data.length]; }Em{?Hqy
mergeSort(data,temp,0,data.length-1); 00i MU
} H:hM(m0?q
!YGHJwW:
private void mergeSort(int[] data, int[] temp, int l, int r) { N5zWeFq@6
int i, j, k; up['<Kt+a
int mid = (l + r) / 2; L$O\fhO?
if (l == r) D ON.)F
return; E@k'uyIu
if ((mid - l) >= THRESHOLD) XTX/vbge3m
mergeSort(data, temp, l, mid); y{3+Un
else R3og]=uFzm
insertSort(data, l, mid - l + 1); AC <2.i_
if ((r - mid) > THRESHOLD) U{ 0~&
mergeSort(data, temp, mid + 1, r); a"YVr'|
else 9jf9u0
insertSort(data, mid + 1, r - mid); V]J"v#!{
D<FQVdP
for (i = l; i <= mid; i++) { WynTU?
temp = data; .^=I&X/P
} u(1m#xr8$
for (j = 1; j <= r - mid; j++) { dDl+
temp[r - j + 1] = data[j + mid]; 0|-}>>qb\
} n[!QrEeR},
int a = temp[l]; 4t =Kt
int b = temp[r]; Pf4zjc
for (i = l, j = r, k = l; k <= r; k++) { '"7b;%EN'
if (a < b) { {:"<E?+
data[k] = temp[i++]; vzfMME17
a = temp; 25`W"x_
} else { N}VoO0I
data[k] = temp[j--]; 53aJnxX
b = temp[j]; k?Hi_;o
} LvS5N)[
} yc]_?S>9
} T=pP
_J\zj
/** U3B&3K} ~
* @param data "zNS6I?rzE
* @param l 2"a%%fv
* @param i l]&A5tz3
*/ 3 $%#n*
private void insertSort(int[] data, int start, int len) { w)S 4Xi=
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ZGH 7_K
} FLQke"6i0:
} j}Svb1A
} Ji,;ri2i
} :kI[Pf!z
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堆排序： jbe:"Stw
JE:LA+ (
package org.rut.util.algorithm.support; B0yGr\KJ
XN t` 4$L
import org.rut.util.algorithm.SortUtil; Q?j '4
0&NM=~
/** R?lTB3"
* @author treeroot ']2d^'TH
* @since 2006-2-2 ) C~#W
* @version 1.0 Rh6CV
*/ j8e=],sQ
public class HeapSort implements SortUtil.Sort{ y'2w*?
r%=a:GdAg
/* (non-Javadoc) L=Aj+
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) z"7?I$NQ
*/ T;Kv<G;
public void sort(int[] data) { J_&cI%.
MaxHeap h=new MaxHeap(); 7ZAxhFC
h.init(data); YG*<jKcX
for(int i=0;i h.remove(); w-)JCdS6Tb
System.arraycopy(h.queue,1,data,0,data.length); wsrdBxd5
} 8Wtr,%82
fl4@5AVY
private static class MaxHeap{ a0JMLLa [I
<w~$S0_
void init(int[] data){ 7W},5c
this.queue=new int[data.length+1]; V+>RF
for(int i=0;i queue[++size]=data; d<ES
fixUp(size); <<qzZ+u
} [8tpU&J
} >(n/
ho^c#>81
private int size=0; `r=^{Y
4?(=?0/[
private int[] queue; (K6vXq.;\\
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public int get() { l#ct;KZ
return queue[1]; g1F9IB42@<
} nw*a?$S3
{7IZN< e
public void remove() { {be|G^.c
SortUtil.swap(queue,1,size--); A`vRUl,c=
fixDown(1); :SN?t
} OBlQ
file://fixdown $M-"az]
private void fixDown(int k) { rFC9y o
int j; 23=wz%tF
while ((j = k << 1) <= size) { \[]BB5)8
if (j < size %26amp;%26amp; queue[j] j++; jsV1~1:83
if (queue[k]>queue[j]) file://不用交换 H 9/m6F
break; er 1zSTkg
SortUtil.swap(queue,j,k); `3K."/N6c
k = j; IYptNR
} UZiL NKc
} <uoVGV5N
private void fixUp(int k) { 0.!vp?
while (k > 1) { 874j9ky[
int j = k >> 1; j";L{
if (queue[j]>queue[k]) Xsb.xxK.
break; (Y&gse1}!
SortUtil.swap(queue,j,k); ;gJAxVD<
k = j; <|WXFjn
} 33}p02#
} 2}P{7flDY
g(jn /Cx
} {KTZSs $n
hQzT =0
} o4rf[.z
rWM5&M
SortUtil： _q-k1$o$
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package org.rut.util.algorithm; vsA/iH.
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import org.rut.util.algorithm.support.BubbleSort; %AT/g&M&1#
import org.rut.util.algorithm.support.HeapSort; _iqaKYT$
import org.rut.util.algorithm.support.ImprovedMergeSort; A5}N[|z
import org.rut.util.algorithm.support.ImprovedQuickSort; ==KDr0|G
import org.rut.util.algorithm.support.InsertSort; VL\Ah3+
import org.rut.util.algorithm.support.MergeSort; >W:kTS<
import org.rut.util.algorithm.support.QuickSort; c2gZ<[~
import org.rut.util.algorithm.support.SelectionSort; .ArOZ{lKD>
import org.rut.util.algorithm.support.ShellSort; 0"sZP\<p
54]UfmT%I
/** L)H/t6}i
* @author treeroot 'UCClj;?K
* @since 2006-2-2 j6*e^ B
* @version 1.0 Xe ^NVF
*/ h^H)p`[Gme
public class SortUtil { A}uWy^w
public final static int INSERT = 1; SrMfd7H8f
public final static int BUBBLE = 2; #;P-*P
public final static int SELECTION = 3; >^@~}]L
public final static int SHELL = 4; Zwtz )ZII
public final static int QUICK = 5; (w<llb`]
public final static int IMPROVED_QUICK = 6; sA"B/C|(g
public final static int MERGE = 7; \<}e?Yx%
public final static int IMPROVED_MERGE = 8; gZz5P>^
public final static int HEAP = 9; mX@xV*
*L<<S=g$2
public static void sort(int[] data) { _>t6]?*
sort(data, IMPROVED_QUICK); ob)c0Pz
} 6SAYe%e
private static String[] name={ ?%>S5,f_
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 8js1m55KT
}; zb!RfQ,
\%W"KLP
private static Sort[] impl=new Sort[]{ 0o@eE3^
new InsertSort(), %NhZTmWm
new BubbleSort(), 0)vX
new SelectionSort(), 9~r8$,e
new ShellSort(), ``h*A
new QuickSort(), \gir
new ImprovedQuickSort(), Jjx1`S*i
new MergeSort(), >ISBK[=H
new ImprovedMergeSort(), )RT:u)N
new HeapSort() @Rqn&tA8
}; 99Nm?$g
%F0.TR!!n
public static String toString(int algorithm){ )*BG-nM u
return name[algorithm-1]; T' )l
} YipL_&-
Q"GZh.m
public static void sort(int[] data, int algorithm) { <)oW
impl[algorithm-1].sort(data); u-wj\BU
} =kW7|c5Z
5q}7#{A
public static interface Sort { RDu{U(!
public void sort(int[] data); ~N+H7T.L
} H$3:Ra+ S
7Rr +Uzb(
public static void swap(int[] data, int i, int j) { $r(9'm}W
int temp = data; ~Y7:08
data = data[j]; ~2 J!I^J
data[j] = temp; Yc>.P
} jQ P2[\
} K@!Gs'Op