[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; Rk{vz|
} >xXq:4l>}
int i1=l; 9j5B(_J^
int i2=mid+1; XMaw:Fgr
for(int cur=l;cur<=r;cur++){ z$VVt?K
if(i1==mid+1) GY"c1KE$
data[cur]=temp[i2++]; :J+ANIRI
else if(i2>r) LCb0Kq}*/(
data[cur]=temp[i1++]; }s8xr>
else if(temp[i1] data[cur]=temp[i1++]; R?J8#JPXD
else {@PZlQg
data[cur]=temp[i2++]; Ij9=J1c4
} v7D0E[)~
} VS65SxHA
}Q-Tw,j
} c57`mOe/b
xX8c>p
改进后的归并排序: @2>ce2+
1\/~>
package org.rut.util.algorithm.support; |{rhks~
9MbF:
import org.rut.util.algorithm.SortUtil; fS%B/h=
"Q{7X[$$^
/** u=0161g
* @author treeroot ~$1g"jIw
* @since 2006-2-2 8mO_dQ
* @version 1.0 c#@L~<
*/ \t? ;p-+ta
public class ImprovedMergeSort implements SortUtil.Sort { !HXyvyDN
-1ci.4F&
private static final int THRESHOLD = 10; IcNZUZGE
{RD9j1
/* f3<2531/}
* (non-Javadoc) dx.Jv/Mb
* %mOQIXr1s
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Ki /j\
*/ q~{O^,4S
public void sort(int[] data) { *]DO3Zw'
int[] temp=new int[data.length]; iZ(JwY
mergeSort(data,temp,0,data.length-1); n+s=u$%qn
} f^Q)lIv
M1*x47bN
private void mergeSort(int[] data, int[] temp, int l, int r) { P|a|4Bb+fW
int i, j, k; d-I=xpB
int mid = (l + r) / 2; D8b9T.[(
if (l == r) -)DxF<8B
return; 4OG1_6K
if ((mid - l) >= THRESHOLD) i\* b<V
mergeSort(data, temp, l, mid); %V(U]sbV
else 8C I\NR{x8
insertSort(data, l, mid - l + 1); :aD_>,n
if ((r - mid) > THRESHOLD) V)ITk\
mergeSort(data, temp, mid + 1, r); p1IN%*IV+o
else @J6V,
insertSort(data, mid + 1, r - mid); ]@l;;Sp
O_*tDq,e
for (i = l; i <= mid; i++) { _?XR;2]
temp = data; s|R`$+'{
} `*B6T7p1
for (j = 1; j <= r - mid; j++) { ^Jc|d,u;s
temp[r - j + 1] = data[j + mid]; OSwum!hzN
} M0]J`fL@
int a = temp[l]; 41+@!`z7
int b = temp[r]; Yv[<c!\
for (i = l, j = r, k = l; k <= r; k++) { w4RtIDW:
if (a < b) { r\q|DZ7
data[k] = temp[i++]; i1Y<[s
a = temp; .RbPO#(
} else { O81'i2MJ9
data[k] = temp[j--]; "~"=e
b = temp[j]; <V|\yH9
} V@`%k]k
} jTqEV(
} *(sv5c!0M8
^j1iCL!
/** P R_| 8H|
* @param data v5W-f0Jo
* @param l j% '~l#nw
* @param i NFf?~I&mfu
*/ Uu|R]azbO
private void insertSort(int[] data, int start, int len) { 6)~7Uf:<v
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Zy>y7O(,
} M2A_T.F=H
} 0aYoc-( A
} e )]
} =bQ\BY#
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堆排序： o9Tsyjbj
:T#f&|Gg;
package org.rut.util.algorithm.support; Mp@dts/|
=3GgfU5k
import org.rut.util.algorithm.SortUtil; ~;oaW<"
ra1_XR}
/** {G=|fgz
* @author treeroot ?%b#FXA
* @since 2006-2-2 =r~ExW}+
* @version 1.0 x, 'KI?TyQ
*/ |doG}C
public class HeapSort implements SortUtil.Sort{ eX'V#K#C
xBE}/F$45
/* (non-Javadoc) SYgkYR
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2Xv$
*/ ZD4:'m`T/
public void sort(int[] data) { t]ID
MaxHeap h=new MaxHeap(); 0 l+Jq
h.init(data); !" @<!
for(int i=0;i h.remove(); :79u2wSh
System.arraycopy(h.queue,1,data,0,data.length); ]'0}fuV
} <Q_E3lQy/
}?9A:&
private static class MaxHeap{ t*Z4&Sy^
xqv&^,ic
void init(int[] data){ } ;d=
this.queue=new int[data.length+1]; M|UCV_omN
for(int i=0;i queue[++size]=data; z:A_
fixUp(size); ye4GHAm,p
} L!Gpk)}[i
} $IJ"fs
yxi*4R
private int size=0; ,S&p\(r.
-.5R.~@
private int[] queue; <}}u'5;^?x
[*r=u[67F
public int get() { r(g#3i4Q
return queue[1]; <lRjh7
} Xj<xen(
MKX58y{+
public void remove() { }eSrJgF4M
SortUtil.swap(queue,1,size--); )c<[@::i
fixDown(1); $?DEO[p.
} j/1f|x
file://fixdown =Nr?F'<
private void fixDown(int k) { 12l1u[TlS
int j; D@m3bsMwe
while ((j = k << 1) <= size) { ~bgM*4GW
if (j < size %26amp;%26amp; queue[j] j++; l=<},_]{
if (queue[k]>queue[j]) file://不用交换 -v9x tNg
break; n9V8A[QJ
SortUtil.swap(queue,j,k); 9T<k|b[6
k = j; _TbvQY
} RP9~n)h~b
} WdbHT|.Aj
private void fixUp(int k) { !z]{zM%
while (k > 1) { J$S*QCo
int j = k >> 1; `_OB_F
if (queue[j]>queue[k]) & z5:v-G?
break; >j&k:
SortUtil.swap(queue,j,k); Y0ACJ?|
k = j; m>!aI?g
} S"@@BQ#mf
} it->)?"(6
\OkJX_7
} K"Gea`I
e+y%M
} Ib"fHLWA^!
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SortUtil： "P$')uwE
*nwH1FjH
package org.rut.util.algorithm; ,W>-MPJn[8
nE4rB\
import org.rut.util.algorithm.support.BubbleSort; k.\4<}
import org.rut.util.algorithm.support.HeapSort; Us3zvpy)o
import org.rut.util.algorithm.support.ImprovedMergeSort; h3Nbgxa.
import org.rut.util.algorithm.support.ImprovedQuickSort; od*#)
import org.rut.util.algorithm.support.InsertSort; 2nSK}q
import org.rut.util.algorithm.support.MergeSort; uC2qP)m,^
import org.rut.util.algorithm.support.QuickSort; 9} ]C
import org.rut.util.algorithm.support.SelectionSort; =27ZY Z
import org.rut.util.algorithm.support.ShellSort; a4",BDx
Iv?1XI=
/** b6'ZVB
* @author treeroot vX$|/74
* @since 2006-2-2 #,OiZQJC
* @version 1.0 jK2gc^"t
*/ 9-y<= )
public class SortUtil { Rj-4K@a8#N
public final static int INSERT = 1; ?]>;Wr
public final static int BUBBLE = 2; %< Jj[F
public final static int SELECTION = 3; 9<5ii
public final static int SHELL = 4; 8*eVP*g
public final static int QUICK = 5; 'i 8`LPQ
public final static int IMPROVED_QUICK = 6; _SQ]\Z
public final static int MERGE = 7; |C7=$DgwY
public final static int IMPROVED_MERGE = 8; S~GS:E#
public final static int HEAP = 9; ;s5JYR
cgR8+o
public static void sort(int[] data) { N^jr
sort(data, IMPROVED_QUICK); 5w</Ga
} `r0MQkk
private static String[] name={ }jYVB|2
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" x'V:qv*O
}; YyC$\HH6
K pmq C$
private static Sort[] impl=new Sort[]{ "4.A@XsY
new InsertSort(), 3GXmyo:o$
new BubbleSort(), //yz$d>JN
new SelectionSort(), au/5`
new ShellSort(), 5B;;{GR
new QuickSort(), qrcir-+
new ImprovedQuickSort(), KqXPxp^_Al
new MergeSort(), O66b^*=N}x
new ImprovedMergeSort(), l^rQo_alk
new HeapSort() m|PJwd6
}; {G{>Qa|
9M@,BXOt
public static String toString(int algorithm){ {%6g6?=j
return name[algorithm-1]; \Z-Fu=8J8^
} 24 RD
Uq.hCb`:
public static void sort(int[] data, int algorithm) { eU\_m5xl"
impl[algorithm-1].sort(data); <6C:\{eo
} Y$W)JWMY`
"MyMByomQ
public static interface Sort { -K6y#O@@
public void sort(int[] data); ym2"D?P (
} E|_}?>{R
{X-a6OQj
public static void swap(int[] data, int i, int j) { igF<].'V
int temp = data; +(h{3Y|
data = data[j]; Tj!rAMQk
data[j] = temp; XjTu`?Na;
} ,Eo\(j2F.
} d5n>2iO