[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; [K/m
} ;)AfB#:d
int i1=l; 0\9K3
int i2=mid+1; o=J9
for(int cur=l;cur<=r;cur++){ PxFWJ?=
if(i1==mid+1) DL'iS
data[cur]=temp[i2++]; 8flOq"uK^
else if(i2>r) V5F%_,No
data[cur]=temp[i1++]; UBv@+\Y8m
else if(temp[i1] data[cur]=temp[i1++]; NB_)ZEmF
else vmTs9"ujF,
data[cur]=temp[i2++]; PQN@JaD
} cTTW06^
} 3*UR3!Z9 *
Iq7}
} vQ}6y
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改进后的归并排序: }Z-Z|G)#
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package org.rut.util.algorithm.support; $Fkaa<9;P
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import org.rut.util.algorithm.SortUtil; d?AlI
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/** rKH:[lKm
* @author treeroot C)'q QvA
* @since 2006-2-2 ?<Wb@6kh`
* @version 1.0 w;UqEC V
*/ /H7&AiA
public class ImprovedMergeSort implements SortUtil.Sort { uDw.|B2ui
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private static final int THRESHOLD = 10; 'H8(=9O1d
Y6i _!z[V[
/* G7!W{;@I
* (non-Javadoc) m%;D
* gKLyL]kAGz
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &8.NT~"Gg
*/ 05yZad*
public void sort(int[] data) { 5tjP6Z`!9`
int[] temp=new int[data.length]; W&(k!6<x
mergeSort(data,temp,0,data.length-1); 8to8!(
} X\$ 0
40E#JF#
private void mergeSort(int[] data, int[] temp, int l, int r) { k>x&Ip8p
int i, j, k; &k-Vcrcz
int mid = (l + r) / 2; W[EKD 7
if (l == r) 9O{b]=>wq
return; ~x#w<0e>
if ((mid - l) >= THRESHOLD) J^R=dT!
mergeSort(data, temp, l, mid); ~/^5) g_
else _Z5Mw+=19
insertSort(data, l, mid - l + 1); \`V;z~@iA
if ((r - mid) > THRESHOLD) #mize
mergeSort(data, temp, mid + 1, r); H]4Hj
else KL$bqgc(p3
insertSort(data, mid + 1, r - mid); ^7zu<lX
1I@8A>2^OX
for (i = l; i <= mid; i++) { N7E$G{TT
temp = data; Hbv6_H
} kKC9{^%)
for (j = 1; j <= r - mid; j++) { T91moRv
temp[r - j + 1] = data[j + mid]; niB`2J
} ARcB'z\r
int a = temp[l]; lL1k.&|5m
int b = temp[r]; pym!U@$t
for (i = l, j = r, k = l; k <= r; k++) { F}Vr:~
if (a < b) { 2'=T[<nNB
data[k] = temp[i++]; ifN64`AhRX
a = temp; uqz]J$
} else { }D+}DPL{^
data[k] = temp[j--]; X7k.zlH7T
b = temp[j]; @(r/dZc
} N?Lb
} >pUtwIP
} =UyLk-P w
\%UkSO\nO3
/** V#VN%{
* @param data 7{&|;U
* @param l )K &(
* @param i %HrAzM.QBF
*/ df7wN#kO+
private void insertSort(int[] data, int start, int len) { N F)~W#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); dOa%9[
} jKt7M>P
} Eke5Nb
} |:8bNm5[
} 2-Y<4'>
;b-XWK=
堆排序： A}eOFu`
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package org.rut.util.algorithm.support; SlsdqP 9
oudxm[/U
import org.rut.util.algorithm.SortUtil; lNSLs"x^
m2AnXY\
/** 8WnwQ%;m?
* @author treeroot L3CP`cx
* @since 2006-2-2 ZP{*.]Qu
* @version 1.0 ~"A+G4jl
*/ vVOh3{e|
public class HeapSort implements SortUtil.Sort{ '],J$ge
@S|XGf
/* (non-Javadoc) 1GzAG;UUo6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) y5!KXAQ%
*/ a+n0|CvF
public void sort(int[] data) { T=ev[ mS
MaxHeap h=new MaxHeap(); W6Y]N/v3>
h.init(data); AK@9?_D
for(int i=0;i h.remove(); /Rl6g9}
System.arraycopy(h.queue,1,data,0,data.length); X&kp;W
} Y]&j,j&
O%bEB g
private static class MaxHeap{ ](hE^\SC
KCs[/]
void init(int[] data){ R17?eucZ
this.queue=new int[data.length+1]; h$2</J"
for(int i=0;i queue[++size]=data; 0Vx.nUQ
fixUp(size); yqPdl1{Qr=
} !r<pmr3f@7
} &Xf}8^T<V
4<BjC[@~Z{
private int size=0; E>K!Vrh-L
V:joFRH9
private int[] queue; {;2PL^i
Zu7)gf
public int get() { kGl~GOB a
return queue[1]; .[_L=_.
} lnjXDoVb<
5 sX+~Q
public void remove() { vam;4vyu
SortUtil.swap(queue,1,size--); 5aCgjA11
fixDown(1); ?`?)QE8
} Hl,W=2N
file://fixdown *WuID2cOI
private void fixDown(int k) { %KLpig
int j; #{;k{~;PF
while ((j = k << 1) <= size) { x7Yu I
if (j < size %26amp;%26amp; queue[j] j++; V-BiF>+
if (queue[k]>queue[j]) file://不用交换 m^zUmrj[
break; +L;e^#>d
SortUtil.swap(queue,j,k); J\b^)
k = j; u ,KD4{!
} ?{ryGhb~
} z:wutqru
private void fixUp(int k) { %%[LKSTb
while (k > 1) { x<ZJb
int j = k >> 1; -Fe?R*-g
if (queue[j]>queue[k]) #pnI\
break; )P sY($ &
SortUtil.swap(queue,j,k); NPp;78O0[
k = j; 'd9INz.
} %#kg#@z_`e
} %lGl,me H
9w7n1k.
} tVN
"]} bFO7C
} oG_~q w|h
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SortUtil： %WjXg:R
fbe[@#:
package org.rut.util.algorithm; MDnua
R[D{|K@"
import org.rut.util.algorithm.support.BubbleSort; GBPo8L"9
import org.rut.util.algorithm.support.HeapSort; FOE4>zE
import org.rut.util.algorithm.support.ImprovedMergeSort; ;@oN s-
import org.rut.util.algorithm.support.ImprovedQuickSort; &OH={Au
import org.rut.util.algorithm.support.InsertSort; Li4zTR|U
import org.rut.util.algorithm.support.MergeSort; K &N
import org.rut.util.algorithm.support.QuickSort; pOIJH =#
import org.rut.util.algorithm.support.SelectionSort; cQ R]le%(
import org.rut.util.algorithm.support.ShellSort; k5'Vy8q
p$]3'jw
/** o6.^*%kM'
* @author treeroot :74y!
* @since 2006-2-2 3[Qxd{8r
* @version 1.0 T4Pgbop
*/ {8W'%\!=
public class SortUtil { GjvOM y
public final static int INSERT = 1; VA#"r!1
public final static int BUBBLE = 2; I&x=;
public final static int SELECTION = 3; 9y"@(
public final static int SHELL = 4; 0AL=S$B)
public final static int QUICK = 5; p8Qk'F=h
public final static int IMPROVED_QUICK = 6; fHx*e'eA
public final static int MERGE = 7; vdc\R?
public final static int IMPROVED_MERGE = 8; ek*rp`y]
public final static int HEAP = 9; x??+~$}\*-
|ATvS2
public static void sort(int[] data) { +%h8r5o1
sort(data, IMPROVED_QUICK); c(xrP/yOwi
} Ng2twfSl$
private static String[] name={ Z 2V.3
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" L>Fa^jq5
}; 86=}ZGWd
_-K2/6zy
private static Sort[] impl=new Sort[]{ iu=7O
new InsertSort(), ,/Z%@-rF
new BubbleSort(), EE06h-ns
new SelectionSort(), aC8} d
new ShellSort(), 65JF`]
new QuickSort(), (c=6yV@
new ImprovedQuickSort(), 2DrP"iGq5
new MergeSort(), z]_wjYn Z
new ImprovedMergeSort(), 7x|9n
new HeapSort() UD2C>1j
}; dy%;W%
B9jC?I |`
public static String toString(int algorithm){ vc;$-v$&
return name[algorithm-1]; KQ!8ks]
} )Q&(f/LT
BYL)nCc
public static void sort(int[] data, int algorithm) { spH7 /5}
impl[algorithm-1].sort(data); U]H#MiC!
} ) j#`r/
PUMXOTu]
public static interface Sort { 2*;~S44
public void sort(int[] data); *v^Jb/E315
} 3nO]Ge"w'n
P64PPbP
public static void swap(int[] data, int i, int j) { >* f-Wde
int temp = data; pP&7rRhw
data = data[j]; O:;w3u7;u
data[j] = temp; c_$=-Khk
} -P$PAg5"2
} %rL.|q9