[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; !ZtSbOC'
} V*jsq[q=
int i1=l; Edt}",s7
int i2=mid+1; o96:4j4
for(int cur=l;cur<=r;cur++){ ?Z %:
if(i1==mid+1) S;@ay/*~
data[cur]=temp[i2++]; EU`T6M
else if(i2>r) {_ V0
data[cur]=temp[i1++]; "/x_>ui1F
else if(temp[i1] data[cur]=temp[i1++]; whc[@Tyx
else x%BF{Sw
data[cur]=temp[i2++]; T|'&K:[TJ
} l\q} |o
} )ctr"&-
>w'$1tc?+F
} %l9$a`&
7 Yv!N
改进后的归并排序: mv Ov<x;l
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package org.rut.util.algorithm.support; EZr6oO@Nc
/NBTvTI
import org.rut.util.algorithm.SortUtil; H30OUrD
@Jv# fr
/** z%"Ai)W/{
* @author treeroot \SYvD y]
* @since 2006-2-2 LPE)
* @version 1.0 P2k7M(I_&
*/ oh}^?p
public class ImprovedMergeSort implements SortUtil.Sort { -@bp4Z=
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private static final int THRESHOLD = 10; M'jXve(=yF
Q</h-skLZ
/* E8[XG2ye
* (non-Javadoc) +g\;bLT
* o'UHStk
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 3o8\/-*<
*/ Y)p4]>lT+8
public void sort(int[] data) { Gbb\h
int[] temp=new int[data.length]; INNAYQ
mergeSort(data,temp,0,data.length-1); f]_mzF=&
} w7Dt1axB
9D4-^M:a
private void mergeSort(int[] data, int[] temp, int l, int r) { !=zx
int i, j, k; 5:gj&jt;)7
int mid = (l + r) / 2; QUP|FIpZ
if (l == r) _PB@kH#
return; obGWxI%a
if ((mid - l) >= THRESHOLD) wGXwzU
mergeSort(data, temp, l, mid); wJIB$3OT
else Ph)|j&]
insertSort(data, l, mid - l + 1); 6v47 QW|'
if ((r - mid) > THRESHOLD) O-GxUHwWr
mergeSort(data, temp, mid + 1, r); %Y',|+Arx
else z}APR@?`n8
insertSort(data, mid + 1, r - mid); P/aDd@j
t.=Oj
for (i = l; i <= mid; i++) { 5+L8\V9;
temp = data; :('I)C
} GXeAe}T
for (j = 1; j <= r - mid; j++) { HF4Lqh'oco
temp[r - j + 1] = data[j + mid]; s-6:N9-
} jH0Bo;
int a = temp[l]; 1xC`ZhjcD
int b = temp[r]; J:};n@<
for (i = l, j = r, k = l; k <= r; k++) { ,ep9V,+|
if (a < b) { ;X7i/DQ
data[k] = temp[i++]; j.& ;c'V$.
a = temp; >h7$v~nra
} else { T&/_e
data[k] = temp[j--]; nLd~2qBuv
b = temp[j]; &z ksRX
} 5P\N"Yjx'
} _;G=G5r
} iwo$\
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/** NhDA7z`b'J
* @param data 4K,''7N3
* @param l #WEq-0L
* @param i kIM C~Z
*/ b;{h?xc6
private void insertSort(int[] data, int start, int len) { RZ6~c{
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); @XBH.A^7r
} q)oN2-
} E\!n49
} !3x*k;0
} ewQe/Fq
k`@w(HhS
堆排序： sRi%1r7
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package org.rut.util.algorithm.support; ]wf|PU~nr
u:5IjOb2^
import org.rut.util.algorithm.SortUtil; DPeVKyjU
{rfte'4;=
/** Y-~;E3(
* @author treeroot GC?S];PL
* @since 2006-2-2 g< )72-h
* @version 1.0 lPp6 pVr
*/ f!!P
public class HeapSort implements SortUtil.Sort{ ^2JPyyZa
:B^mV{~
/* (non-Javadoc) O\JD,w
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {9;eH'e
*/ >]?Jrs
public void sort(int[] data) { U#"WrWj
MaxHeap h=new MaxHeap(); g-eq&#
h.init(data); D"`[6EN[
for(int i=0;i h.remove(); jMqx
System.arraycopy(h.queue,1,data,0,data.length); -fQX4'3R
} 4@/z
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private static class MaxHeap{ %09*l%,;
`{L{wJ:&a
void init(int[] data){ #'iPDRYy
this.queue=new int[data.length+1]; Q>[Ce3
for(int i=0;i queue[++size]=data; X\'E4
fixUp(size); z.j4tc9F/5
} j88=f#<
} 3B -NYJa
xfes_v""
private int size=0; Ff&R0v
F7V6-V{_
private int[] queue; 8.-S$^hj~6
nHVPMi>
public int get() { h,.fM}=H
return queue[1]; OsB?1;:
} soxfk+ 9
6~3jn+K$1
public void remove() { F'ENq6
SortUtil.swap(queue,1,size--); &|NZ8:*+#
fixDown(1); bkkSIl+Q
} *bU% @O
file://fixdown ik1XGFy?
private void fixDown(int k) { ?4MSgu
int j; HoV{Uzm
while ((j = k << 1) <= size) { ysl8LK
if (j < size %26amp;%26amp; queue[j] j++; i.F8
if (queue[k]>queue[j]) file://不用交换 ]qMH=>pOsj
break; )*Vj3Jx
SortUtil.swap(queue,j,k); Tfr`?:yF
k = j; \d ui`F"Cc
} unJiE!
} |[DV\23{G
private void fixUp(int k) { )kF2HF
while (k > 1) { v10mDr
int j = k >> 1; (< :mM
if (queue[j]>queue[k]) |;~nI'0O])
break; p!QR3k.9s
SortUtil.swap(queue,j,k); I}rGx
k = j; h&q=I.3O|?
} 7^&lbzVbm(
} R~!\-6%_
/ Z1Wy-Z
} '%);%y@v
dA|Lufy#
} !2#\| NJk
7 TmK
SortUtil： 8V,"Id][
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package org.rut.util.algorithm; :|zp8|
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import org.rut.util.algorithm.support.BubbleSort; {[my"n2
import org.rut.util.algorithm.support.HeapSort; Oe/73| >U
import org.rut.util.algorithm.support.ImprovedMergeSort; xSx&79Ez<*
import org.rut.util.algorithm.support.ImprovedQuickSort; pmoGudaRF
import org.rut.util.algorithm.support.InsertSort; :&qC<UD
import org.rut.util.algorithm.support.MergeSort; gO9'q='5l
import org.rut.util.algorithm.support.QuickSort; L!?v BL
import org.rut.util.algorithm.support.SelectionSort; 2 aew6~
import org.rut.util.algorithm.support.ShellSort; `!<x"xKu
2.!1kije
/** ^4RO
* @author treeroot ~d&'Lp[3
* @since 2006-2-2 u"*J[M~
* @version 1.0 aD?# ,
*/ E7k-pquvE
public class SortUtil { K?$9N}+
public final static int INSERT = 1; a^%8QJW
public final static int BUBBLE = 2; ^dheJ]n=k
public final static int SELECTION = 3; [y_yPOv
public final static int SHELL = 4; gHp'3SnS
public final static int QUICK = 5; ]!]`~ Z/
public final static int IMPROVED_QUICK = 6; =7FE/S
public final static int MERGE = 7; YomwjKyuP
public final static int IMPROVED_MERGE = 8; ~wa%fM
public final static int HEAP = 9; p .lu4
qK{|Q
public static void sort(int[] data) { ?OdV1xB
sort(data, IMPROVED_QUICK); 0W;q!H[G
} *iPs4Es-
private static String[] name={ ,:c:6Y^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" gkSGRshf
}; LQ~LB'L
Z`^ K%P=
private static Sort[] impl=new Sort[]{ & 8ccrw
new InsertSort(), Xs{/}wc.q;
new BubbleSort(), +dDJes!]
new SelectionSort(), <m~T>Ql1
new ShellSort(), MP6 \r
new QuickSort(), @=02
new ImprovedQuickSort(), yBr$ 0$
new MergeSort(), Q~x*bMb.
new ImprovedMergeSort(), j@%K*Gb`
new HeapSort() A"Tc^Ij
}; (r.$%[,.<
V#p G; ,
public static String toString(int algorithm){ 9"m,p
return name[algorithm-1]; qJ#L)
} 9vB9k@9
sx<} tbG
public static void sort(int[] data, int algorithm) { H4P\hOK7r
impl[algorithm-1].sort(data); z:dXc
} }K#iCby4
Vww@eK%5Q
public static interface Sort { ;+S2h-4
public void sort(int[] data); plzE
} _JfJ%YXy
l*~"5f03
public static void swap(int[] data, int i, int j) { ~+sne7 6 U
int temp = data; oc!biE`u
data = data[j]; #N<s^KYG-
data[j] = temp; }T?i%l
} >:3xi{
} e-nWD