[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; qt*+ D
} V+y"L>K
int i1=l; l v hJ
int i2=mid+1; B(94;,(
for(int cur=l;cur<=r;cur++){ dt,Z^z+"E
if(i1==mid+1) jBOl:l,+
data[cur]=temp[i2++]; D9A%8[Yo
else if(i2>r) eh `%E0b}
data[cur]=temp[i1++]; r{9fm,
else if(temp[i1] data[cur]=temp[i1++]; H~nZ=`P9&
else -~lq <M
data[cur]=temp[i2++]; >h#w~@e::
} gCC7L(1
} matna
,!^5w,P:
} &0qpgl|
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改进后的归并排序: ktx| c19
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package org.rut.util.algorithm.support; ,>S7c
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import org.rut.util.algorithm.SortUtil; E'DHO2 Y
qJrKt=CE
/** (BeJ,K7
* @author treeroot ?X6}+
* @since 2006-2-2 -dBWpT
* @version 1.0 XDPgl=~
*/ v/c]=/
public class ImprovedMergeSort implements SortUtil.Sort { & rab,I"
tOLcnWt
private static final int THRESHOLD = 10; I*3}erT
)j>U4a
/* {DQ%fneN4
* (non-Javadoc) 2*V[kmD/3
* II}M|qHaK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) @e GBF Ns
*/ Gb\PubJ
public void sort(int[] data) { 0~^RHb.NA8
int[] temp=new int[data.length]; Q'jw=w!|g
mergeSort(data,temp,0,data.length-1); 2icQ (H;
} Q}L?o
{XmCG%%L
private void mergeSort(int[] data, int[] temp, int l, int r) { ZDW=>}~_y
int i, j, k; A,cXN1V
int mid = (l + r) / 2; z m$Sw0#(
if (l == r) gE#'Zv{7
return; " L`)^
if ((mid - l) >= THRESHOLD) +wmG5!%$|
mergeSort(data, temp, l, mid); 5z!$=SFz
else bPU i44P
insertSort(data, l, mid - l + 1); PU/<7P*
if ((r - mid) > THRESHOLD) $0E+8xE
mergeSort(data, temp, mid + 1, r); c_D(%Vf5
else hcj}6NXc
insertSort(data, mid + 1, r - mid); *kl :/#
/D3{EjUE=
for (i = l; i <= mid; i++) { Ptv'.<-
temp = data; 5o dT\>Sn
} LnI
for (j = 1; j <= r - mid; j++) { 3uqhYT;
temp[r - j + 1] = data[j + mid]; mOsp~|d
} RDp
int a = temp[l]; 9_?xAJ
int b = temp[r]; :lcq3iFn
for (i = l, j = r, k = l; k <= r; k++) { >Q\Kc=Q|
if (a < b) { Zp9. ~&4o-
data[k] = temp[i++]; w#|L8VAh
a = temp; U\Wo&giP[
} else { IT_I.5*A2
data[k] = temp[j--]; KkA)p/
b = temp[j]; \xkKgI/
} S%i^`_=Q
} ;/j2(O^
} U%nkPIFm
No'?8+i
/** =1l6(pJ
* @param data o eUi
* @param l ?dgyi4J?=`
* @param i ,twx4r^
*/ F~mIV;BP
private void insertSort(int[] data, int start, int len) { e"nm<&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); y>P+"Z.K%}
} vjuFVJwL
} $v|W2k
} F)LbH&Kn
} WTJ 0Q0U
M6) G_-
堆排序： bO=|utpk
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package org.rut.util.algorithm.support; `@/)S^jBau
%c }V/v_h
import org.rut.util.algorithm.SortUtil; tJ\ $%
+WH\,E
/** Iux3f+H
* @author treeroot FlBhCZ|^
* @since 2006-2-2 .A2$C|a*
* @version 1.0 xh;V4zK@`
*/ 5?kfE
public class HeapSort implements SortUtil.Sort{ fjh|V9H
i+Z)`
/* (non-Javadoc) q&3 ;e4
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) v ,8;: sD
*/ D|:'|7l W
public void sort(int[] data) { S /hx\TzC
MaxHeap h=new MaxHeap(); B/twak\
h.init(data); (Rw<1q`,
for(int i=0;i h.remove(); p}1i[//S
System.arraycopy(h.queue,1,data,0,data.length); G{U#9
} .H" ?&Mf
cb}"giXQTB
private static class MaxHeap{ [C'bfX5HB5
Fc~G*Gz~Z|
void init(int[] data){ 8 #_pkVQw:
this.queue=new int[data.length+1]; VW-qQe
for(int i=0;i queue[++size]=data; X0/slOT
fixUp(size); sg2;"E@
} IDohv[#
} "4N&T#
rq+_[!
private int size=0; =8AT[.Hh
wZqYtJ
private int[] queue; Ez3fL&*
-$Oh.B`i
public int get() { F-_u/C]
return queue[1]; 1Cr&6't
} I'/3_AX
K"#$",}=
public void remove() { GEc6;uz<
SortUtil.swap(queue,1,size--); Z(mUU]
fixDown(1); F-&tSU,
} LgqQr6y"
file://fixdown ARH~dN*C
private void fixDown(int k) { C/kf?:j
int j; M(%H
while ((j = k << 1) <= size) { Q]ersA8 V>
if (j < size %26amp;%26amp; queue[j] j++; VD;*UkapZx
if (queue[k]>queue[j]) file://不用交换 g`Z=Y7jLH
break; ~k"+5bHa*
SortUtil.swap(queue,j,k); TEtmmp0OD
k = j; WtT;y|W
} E&M(QX5
} *dl hRa
private void fixUp(int k) { UP~28%>X
while (k > 1) { p.DQ|?
int j = k >> 1; YQBLbtn6(
if (queue[j]>queue[k]) PX:#+bq1
break; X1j8tg
SortUtil.swap(queue,j,k); DIC*{aBf
k = j; $7x2TiAL
} !/FRL<mp
} F/5&:e?( )
Y|Iq~Qy~
} Kk3+ ]W<
_imuyt".+
} '{&Q&3J_
2t= =<x
SortUtil： `#""JTA"
@N*|w Kc+
package org.rut.util.algorithm; 2W AeSUX
#]` uH{
import org.rut.util.algorithm.support.BubbleSort; H$![]Ujq
import org.rut.util.algorithm.support.HeapSort; w~lH2U'k}
import org.rut.util.algorithm.support.ImprovedMergeSort; `7"="T~ *
import org.rut.util.algorithm.support.ImprovedQuickSort; j G8;p41
import org.rut.util.algorithm.support.InsertSort; fzsy<Vl",
import org.rut.util.algorithm.support.MergeSort; e3I""D{)[=
import org.rut.util.algorithm.support.QuickSort; gZ@+62
import org.rut.util.algorithm.support.SelectionSort; -/f$s1
import org.rut.util.algorithm.support.ShellSort; -TUJ"ep]QJ
mLCDN1UO{
/** e~)[I!n
* @author treeroot AA\a#\#Z3
* @since 2006-2-2 F*72g)hVh
* @version 1.0 n0(Q/
*/ E7Lqa S
public class SortUtil { hD6BP
public final static int INSERT = 1; UU=]lWib
public final static int BUBBLE = 2; @16GF!.
public final static int SELECTION = 3; Z.VKG1e}
public final static int SHELL = 4; F8pA)!AH
public final static int QUICK = 5; m:@y_:X0
public final static int IMPROVED_QUICK = 6; B[b>T=
public final static int MERGE = 7; Wjb_H (D
public final static int IMPROVED_MERGE = 8; O(^h_
public final static int HEAP = 9; {_9O4 + &
Ho &Q}<(
public static void sort(int[] data) { GJ9>i)+h;
sort(data, IMPROVED_QUICK); rc_m{.b
} |{9<%Ok4P
private static String[] name={ J0xHpe
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" O}M-6!%<,
}; ;;0'BdsL`
=j.TDv'^nd
private static Sort[] impl=new Sort[]{ :=Olp;+_
new InsertSort(), bzr2Zj{4
new BubbleSort(), 9q'9i9/3d
new SelectionSort(), 2B_|"J
new ShellSort(), <)7aNW.
new QuickSort(), gAAC>{Wh
new ImprovedQuickSort(), )Q2IYCj{
new MergeSort(), 7^dr[.Q[*
new ImprovedMergeSort(), <KMCNCU\+
new HeapSort() 8(1*,CJQg
}; * %D_\0;
U,g8:M xHK
public static String toString(int algorithm){ *yBVZD|?H
return name[algorithm-1]; O= S[n
} o[Ffa#sE
8$IKQNS
public static void sort(int[] data, int algorithm) { ?eS;Yc
impl[algorithm-1].sort(data); ~$J;yo~
} =B}IsBn'J
$Q*R/MY
public static interface Sort { q?!HzZ
public void sort(int[] data); M}8P _<,
} j iKHx_9P
<h -)zI
public static void swap(int[] data, int i, int j) { D{(}&8a9
int temp = data; v>8.TE~2
data = data[j]; M%E<]H2;S
data[j] = temp; y3~`qq
} r8 9o
} ,L& yKS@