[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; 8)Vl2z
} W4(
int i1=l; HB.:/5\
int i2=mid+1; **1=|aa:
for(int cur=l;cur<=r;cur++){ A5%Now;.cf
if(i1==mid+1) Dd, &a
data[cur]=temp[i2++]; XI`s M~'
else if(i2>r) el<[Ng[
data[cur]=temp[i1++]; x1Gc|K/-
else if(temp[i1] data[cur]=temp[i1++]; Y q|OX<i`K
else ajkpU.6E:
data[cur]=temp[i2++]; d5{RIM|
} m?4HVv
} 9 *v14c%
@cx#'
} 7[R`52pP
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改进后的归并排序: |GPYbxzc
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package org.rut.util.algorithm.support; Zba<|C
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import org.rut.util.algorithm.SortUtil; ]]_c3LJ2`
dww4o~hO
/** 8LuU2Lo
* @author treeroot 2<AQ{ c
* @since 2006-2-2 {aopGu?i
* @version 1.0 W55kR.X6M
*/ m5P@F@
public class ImprovedMergeSort implements SortUtil.Sort { n#4T o;CS
rV-Xsf7Z
private static final int THRESHOLD = 10; /P/0\3TCi
lX50JJwk
/* 6aWnj*dF
* (non-Javadoc) `Uvc^
* cb. -AlqQ
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1n.F`%YG
*/ lm+s5}*%o
public void sort(int[] data) { )! kl:
int[] temp=new int[data.length]; sYk#XNH
mergeSort(data,temp,0,data.length-1); !9V; 8g
} )hVn/*mH
AmCymT3P*e
private void mergeSort(int[] data, int[] temp, int l, int r) { NKVLd_f k
int i, j, k; X@A8~kj1
int mid = (l + r) / 2; j~9![s!
if (l == r) V9>$M=
return; #??[;xjs!
if ((mid - l) >= THRESHOLD) T7Ju7_q}
mergeSort(data, temp, l, mid); ~eiD(04^r*
else 5pff}Ru`
insertSort(data, l, mid - l + 1); Kz]\o"K
if ((r - mid) > THRESHOLD) 1@~ 1vsJ
mergeSort(data, temp, mid + 1, r); eG.s|0`
else "412w^5[T
insertSort(data, mid + 1, r - mid); ,kFp%qNj
Tx'anP
for (i = l; i <= mid; i++) { 4:s,e<Tc4v
temp = data; &C?4'e
} br?pfs$U
for (j = 1; j <= r - mid; j++) { f&Juq8s_0
temp[r - j + 1] = data[j + mid]; 8@FgvWC
} M%$-c3x
int a = temp[l]; `C^0YGO%
int b = temp[r]; PT4iy<
for (i = l, j = r, k = l; k <= r; k++) { h`p=~u +
if (a < b) { QUz4 Kt
data[k] = temp[i++]; <e@4;Z(h04
a = temp; lpbcpB
} else { 4#B56f8
data[k] = temp[j--]; wkJ@#jD*[
b = temp[j]; g/w<T+v
} sv6m)pwh
} LGYg@DR
} %9L+ Q1o
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/** 6_;n bqY&
* @param data [mG!-.ll
* @param l :"K9(XKKU
* @param i fzN?X=
*/ Ju"c!vu~
private void insertSort(int[] data, int start, int len) { |NWHZo
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ' Yy+^iCus
} <(45(6fQ
} vI"BNC*Q1
} }YU\}T-P
} owA.P-4
fM(~>(q&
堆排序： "|E'E"_1
@F|pKf:M+
package org.rut.util.algorithm.support; -AB0uMot
''p<C)Q
import org.rut.util.algorithm.SortUtil; aZq7(pen
q{L-(!uz7_
/** xd+aO=)Td
* @author treeroot `"#hhKG
* @since 2006-2-2 IGA4"\s
* @version 1.0 qtz~Y~h|>
*/ kJCeQK:W
public class HeapSort implements SortUtil.Sort{ {=MRJg!U
TALiH'w6|e
/* (non-Javadoc) >h$Q%w{V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g6OPYUPg
*/ 4(`U]dNcs
public void sort(int[] data) { %@HuAcNi
MaxHeap h=new MaxHeap(); 7gRR/&ZK
h.init(data); P9jSLM
for(int i=0;i h.remove(); qv<^%7gq
System.arraycopy(h.queue,1,data,0,data.length); rG%8ugap
} ZT<VDcP{
~sNBklK
private static class MaxHeap{ sH%Ts@Pl
tLP Er@
void init(int[] data){ _C,9c7K4
this.queue=new int[data.length+1]; `r %lB
for(int i=0;i queue[++size]=data; _9<Mo;C
fixUp(size); ehZ/J5
} vPrlRG6
} nPjK=o`KR
@z`eqG,']
private int size=0; @=BApuer+
qCF&o7*oN
private int[] queue; x+[ATZ([
Dnd
public int get() { MieO1l
return queue[1]; C;_00EQ=
} UMK9[Iy$<M
-U|Z9sia
public void remove() { nx%eq,Pq
SortUtil.swap(queue,1,size--); Ou+bce
fixDown(1); i*T -9IP
} AN)r(86L
file://fixdown ;"8BbF.
private void fixDown(int k) { ^AoX|R[1%
int j; NIp]n[=.q
while ((j = k << 1) <= size) { (g1Op~EM
if (j < size %26amp;%26amp; queue[j] j++; jPn.w,=)27
if (queue[k]>queue[j]) file://不用交换 N7_(,Gu*R
break; )&%Y{a#
SortUtil.swap(queue,j,k); :G&:v
k = j; k+hl6$:Qj%
} VeOM `jy
} "@t bm[
private void fixUp(int k) { /bLL!nD=^
while (k > 1) { BQB<+o'
int j = k >> 1; Xi w
if (queue[j]>queue[k]) Yaz/L)Y;R
break; U6YHq2<
SortUtil.swap(queue,j,k); \$gA2r
k = j; wZ=@0al
} 8TTj<T!N
} e2L>"/
`$3ktQ$
} 3r[s_Y*
O,#,`2Qc
} 8EBd`kiq
[I7=]X
SortUtil： 0:c3aq&u
gLK0L%"5
package org.rut.util.algorithm; s}bLA>~Ta
$"MGu^0;1
import org.rut.util.algorithm.support.BubbleSort; sH]T1z
import org.rut.util.algorithm.support.HeapSort; xE!b)@>S
import org.rut.util.algorithm.support.ImprovedMergeSort; (i1p6
import org.rut.util.algorithm.support.ImprovedQuickSort; Nv3u)?A3w
import org.rut.util.algorithm.support.InsertSort; [&(~1C|C
import org.rut.util.algorithm.support.MergeSort; ,R=$qi|
import org.rut.util.algorithm.support.QuickSort; ~g;)8X;;+
import org.rut.util.algorithm.support.SelectionSort; r~2q`l'>
import org.rut.util.algorithm.support.ShellSort; {Q@?CT
x{/-&`F
/** Vt:\llsin
* @author treeroot qq@]xdl
* @since 2006-2-2 mE&SAm5#d
* @version 1.0 +Eel|)Z*Q
*/ G2b"R{i/,
public class SortUtil { Bm<tCN-4
public final static int INSERT = 1; q_[`PYT
public final static int BUBBLE = 2; AtxC(gm 1
public final static int SELECTION = 3; ,bP8"|e
public final static int SHELL = 4; {XwDvLZ
public final static int QUICK = 5; ({D>(xN
public final static int IMPROVED_QUICK = 6; tvJl&{-OX
public final static int MERGE = 7; )19#g1rn5
public final static int IMPROVED_MERGE = 8; LLbI}:
public final static int HEAP = 9; D}UgC\u
QSwT1P'U
public static void sort(int[] data) { $x#qv1
sort(data, IMPROVED_QUICK); EYi{~
} </R@)_'
private static String[] name={ A$L:,b(
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" bfkFk
}; x'SIHV4M@Q
c5pK%I}O
private static Sort[] impl=new Sort[]{ 5'%O]~
new InsertSort(), J/PK#<
new BubbleSort(), '{cFr
new SelectionSort(), HrT@Df
new ShellSort(), u`Kc\BSn
new QuickSort(), ft0tRv(s:
new ImprovedQuickSort(), 12Fnv/[n'K
new MergeSort(), 5r dt
new ImprovedMergeSort(), I*/:rb
new HeapSort() !)05,6WQ
}; C:f^&4 3
_,I~1"
public static String toString(int algorithm){ LvU/,.$
return name[algorithm-1]; &vQ5+
} 5glEV`.je
ch0cFF^]
public static void sort(int[] data, int algorithm) { `S4G+j>u6
impl[algorithm-1].sort(data); 3K/]{ dkD
} dP#7ev]'
gADqIPu]
public static interface Sort { fgHsg@33N
public void sort(int[] data); Cv p#=x0
} #Yy5@A}`o
17w{hK4o8O
public static void swap(int[] data, int i, int j) { 1&Ma`M('
int temp = data; SzFh
data = data[j]; #MbY+[Y@v
data[j] = temp; #jO2Zu2`}
} iTF%}(
} yA7O<p+