[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; V&;1n
} J 05@SG':
int i1=l; a|SgGtBtT4
int i2=mid+1; OXe+=Lp<
for(int cur=l;cur<=r;cur++){ [9(tIb!x
if(i1==mid+1) t.$3?"60~
data[cur]=temp[i2++]; H;s
else if(i2>r) BAG) -
data[cur]=temp[i1++]; XE* @*
else if(temp[i1] data[cur]=temp[i1++]; S<rdPS*P
else au@ LQxKQ
data[cur]=temp[i2++]; ,;)Y1q}Q
} k{;"Aj:iL
} &PVos|G
7yD=~l\Bbs
} /x,gdZPX
e:fp8 k<
改进后的归并排序: b6:A-jb*I
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package org.rut.util.algorithm.support; <cNXe4(
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import org.rut.util.algorithm.SortUtil; J(JsfU4
G3'>KMa.
/** ?YWfoH4mS
* @author treeroot ^e:C{]S=
* @since 2006-2-2 +%Q:
* @version 1.0 t~ruP',~\
*/ $}V<Um
public class ImprovedMergeSort implements SortUtil.Sort { zI$^yk-vn
&E0L7?l
private static final int THRESHOLD = 10; l9KLP
}IO<Dq=[
/* Se<]g$eK?5
* (non-Javadoc) +PgUbr[p
* 5LdVcXf
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :,gnOfV=
*/ "X0"=1R~
public void sort(int[] data) { Oo|*q+{
int[] temp=new int[data.length]; 'kb5pl~U
mergeSort(data,temp,0,data.length-1); mbB,j~;^6H
} T6m#sVq
ma9q?H#X
private void mergeSort(int[] data, int[] temp, int l, int r) { [ -"o5!0<
int i, j, k; gNF8&T
int mid = (l + r) / 2; &IsQgS7R
if (l == r) =M'M/vKD
return; PLU8:H@X
if ((mid - l) >= THRESHOLD) +^ a9i5
mergeSort(data, temp, l, mid); bP\0S@1YL
else A'r 3%mC
insertSort(data, l, mid - l + 1); E9z^#@s
if ((r - mid) > THRESHOLD) =y-L'z&r
mergeSort(data, temp, mid + 1, r); CF"$&+s9
else rCfr&>nn
insertSort(data, mid + 1, r - mid); <6QG7i
uMVM-(g%
for (i = l; i <= mid; i++) { %|E'cdvkX
temp = data; _Z?{&k
} `q|&;wP.
for (j = 1; j <= r - mid; j++) { mAMi-9
temp[r - j + 1] = data[j + mid]; **_`AM~
} D,q=?~
int a = temp[l]; Py7!_TX
int b = temp[r]; t\~lGG-p
for (i = l, j = r, k = l; k <= r; k++) { i)9}+M5
if (a < b) { ;,P-2\V/
data[k] = temp[i++]; arJ4^ d
a = temp; &7z79#1NS
} else { U<,@u,_Ja
data[k] = temp[j--]; 2gz}]_
b = temp[j]; kms&o=^
} D^Ahw"X)
} W%LTcm
} ?&;d#z*4
KilgeN:
/** CvfXm
* @param data 8|^dM$
* @param l b~DtaGh
* @param i [ []'U'
*/ 0^'A^
private void insertSort(int[] data, int start, int len) { MV +R$
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Dy6uWv,P
} ?CO\jW_ *n
} $jT&]p
} +Go(yS
} :$k':0 n
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堆排序： HR)Dz~Obw
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package org.rut.util.algorithm.support; VD[x}8ei
jv$Y]nf
import org.rut.util.algorithm.SortUtil; RtVy^~=G
r/v'h@
/** fxfzi{}uj
* @author treeroot r@C2zF7
* @since 2006-2-2 P^m+SAAB
* @version 1.0 nk.Y#+1)
*/ [Du@go1C
public class HeapSort implements SortUtil.Sort{ GT\, @$r
3t<XbHF9
/* (non-Javadoc) U'^AJ2L8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) +5J"G/f
*/ 'J^ M`/
public void sort(int[] data) { bwh7.lDAl
MaxHeap h=new MaxHeap(); kN3T/96
h.init(data); tP; &$y.8
for(int i=0;i h.remove(); )|;*[S4
System.arraycopy(h.queue,1,data,0,data.length); `nBCCz'Y!
} `$og]Dn;
zNSix!F
private static class MaxHeap{ iVq4&X_x
").MU[q%Y
void init(int[] data){ .d< +-w2Mu
this.queue=new int[data.length+1]; A ?"(5da.
for(int i=0;i queue[++size]=data; _&S?uz m
fixUp(size); R=M"g|U6
} 0kN;SSX!
} JA W}]:jC
blxAy
private int size=0; .G[y^w)w}
o(xRq;i
private int[] queue; kp3(/`xP
_\E{T5
public int get() { Gvo(iOU
return queue[1]; @$FE}j_
} (]7*Kq
3wXmX
public void remove() { >Gbj1>C}
SortUtil.swap(queue,1,size--); EtN@ 6xP
fixDown(1); bc}X.IC
} vW4~\]
file://fixdown -r/G)Rs
private void fixDown(int k) { <>aBmJs4
int j; 5 e:Urv77
while ((j = k << 1) <= size) { )6|7L)Dk
if (j < size %26amp;%26amp; queue[j] j++; B{|g+c%
if (queue[k]>queue[j]) file://不用交换 /CpUq;^
break; 3/IQ]8g"
SortUtil.swap(queue,j,k); $ tf;\R
k = j; W-wy<<~f
} j]7|5mC78
} [vki^M5i|Z
private void fixUp(int k) { ?]%JQ]Gf*
while (k > 1) { xsK{nM6g
int j = k >> 1; %bf+Y7m
if (queue[j]>queue[k]) \RN,i]c-g/
break; _'&N01
SortUtil.swap(queue,j,k); '!`%!Xg
k = j; e;b,7Qw
} L(!4e
} o?\)!_Z|
Ore$yI}!m
} UnNvlkjq9
]D^dQ%{
} <*L=u;
7L)1mB.
SortUtil： tB.;T0n
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package org.rut.util.algorithm; RAR0LKGX
3oX%tx
import org.rut.util.algorithm.support.BubbleSort; 4X7y}F.J
import org.rut.util.algorithm.support.HeapSort; Wz$%o'OnC
import org.rut.util.algorithm.support.ImprovedMergeSort; @k~?h=o\b
import org.rut.util.algorithm.support.ImprovedQuickSort; ToNi<~
import org.rut.util.algorithm.support.InsertSort; A(duUl~
import org.rut.util.algorithm.support.MergeSort; 3_=~7B) 8
import org.rut.util.algorithm.support.QuickSort; {ZFa +
import org.rut.util.algorithm.support.SelectionSort; $,08y
import org.rut.util.algorithm.support.ShellSort; \V@SCA'
*Yv"lB8
/** Mq) n=M
* @author treeroot R_h(Z{d
* @since 2006-2-2 E [JXQ76
* @version 1.0 1A^iUC5)
*/ i} 96,{
public class SortUtil { P8NKpO\
public final static int INSERT = 1; Rde_I`Ru
public final static int BUBBLE = 2; >4TJH lB}8
public final static int SELECTION = 3; FzmCS@yA
public final static int SHELL = 4; k*|dX.C:
public final static int QUICK = 5; 2rHw5Wn]~
public final static int IMPROVED_QUICK = 6; EQPZV K/
public final static int MERGE = 7; iU^ 4a
public final static int IMPROVED_MERGE = 8; O;M_?^'W
public final static int HEAP = 9; |)6(_7e9
Pg[zRRf<
public static void sort(int[] data) { QiWv
sort(data, IMPROVED_QUICK); ':#?YQ}2
} %sC,;^wla'
private static String[] name={ bGRI^ [8#+
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" TRz~rW k
}; ezTu1-m
S-Va_t$
private static Sort[] impl=new Sort[]{ /rp4m&!
new InsertSort(), `XYT:'
new BubbleSort(), C>cc!+n%H
new SelectionSort(), R#~}ZUk2
new ShellSort(), G B!3` A%&
new QuickSort(), 7HPLD&WPt
new ImprovedQuickSort(), &Pxt6M\d
new MergeSort(), i=_leC)rl
new ImprovedMergeSort(), sb4)@/Q7j
new HeapSort() ~J2-B2S!
}; 322W"qduTZ
Qv8#{y@U
public static String toString(int algorithm){ T\c;Ra
return name[algorithm-1]; ?>MD/l(l
} A(_AOoA'
B%6bk.
public static void sort(int[] data, int algorithm) { L5T)_iQ5
impl[algorithm-1].sort(data); ^ vI|
} nR/; uTTz
,r5<v_
public static interface Sort { r0G#BPgdR
public void sort(int[] data); d_J?i]AP|'
} iMx+y5O
B0=:A
public static void swap(int[] data, int i, int j) { mDE{s",q/
int temp = data; 9BI5qHEp
data = data[j]; M)Rp+uQ
data[j] = temp; hM\QqZFyp
} Te'^O,C)y$
} hx4!P(o1