[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; zQoJ8i>
} sNZOm$
int i1=l; H/l,;/q]b
int i2=mid+1; `l
for(int cur=l;cur<=r;cur++){ 'j;i4ie>*x
if(i1==mid+1) f('##pND@
data[cur]=temp[i2++]; `$ pJ2S
else if(i2>r) zz #IY'dwT
data[cur]=temp[i1++]; _ygdv\^Tet
else if(temp[i1] data[cur]=temp[i1++]; ]L?WC
else Iv/h1j> H
data[cur]=temp[i2++]; ]F #0to
} !}q@O-}j
} 5hfx2O)
uTrQ<|}#
} |WSmpuf
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改进后的归并排序: dTqL[?wH?
x$KQ*P~q
package org.rut.util.algorithm.support; }[OEtd{
2[Xe:)d
import org.rut.util.algorithm.SortUtil; 0>:`|IGnT2
`+(4t4@ew
/** i}@5<&J
* @author treeroot RQ,X0pS
* @since 2006-2-2 a>S-50
* @version 1.0 02C;
*/ z5W;-sCz
public class ImprovedMergeSort implements SortUtil.Sort { BRtT 7
:AyZe7:(D
private static final int THRESHOLD = 10; aZCxyoh+
(qDJgf4fgn
/* XQcE ZJ2
* (non-Javadoc) c3Zwp%
* i~tps
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) QY$4D;M`g6
*/ sNJ?Z"5k1h
public void sort(int[] data) { 2>im'x 5
int[] temp=new int[data.length]; EC?U#!kv
mergeSort(data,temp,0,data.length-1); A&_v:z4y/
} 3Z74&a$
+Q!Kj7EU/
private void mergeSort(int[] data, int[] temp, int l, int r) { 7G_OFD
int i, j, k; >k(AQW5?
int mid = (l + r) / 2; `;&=m, W'
if (l == r) I2C1mV
return; |sDp>..
if ((mid - l) >= THRESHOLD) sE0,b
mergeSort(data, temp, l, mid); DIh[%
else #DcK{|ty
insertSort(data, l, mid - l + 1); s$VLVT*6
if ((r - mid) > THRESHOLD) ,@t#)HV
mergeSort(data, temp, mid + 1, r); fwaM;YN_
else [q!)Y:|u_>
insertSort(data, mid + 1, r - mid); 1JN/oq;
VM"*@T
for (i = l; i <= mid; i++) { IFWP&20
temp = data; ;\t(c
} <(Ktf0'__
for (j = 1; j <= r - mid; j++) { [Kd"M[1[<
temp[r - j + 1] = data[j + mid]; m`8tHHF
} ]yA_N>k2K
int a = temp[l]; [ ]=}0l<J
int b = temp[r]; YQ5d!a.
for (i = l, j = r, k = l; k <= r; k++) { 1iE*-K%Q
if (a < b) { 9_pOV%Qs
data[k] = temp[i++]; <(caY37o6)
a = temp; q.PXO3T
} else { l # F.S5i
data[k] = temp[j--]; `d:cq.OO
b = temp[j]; on0>_-n)
} {NV=k%MTmi
} gnU##Km|
} z@J;sz
?:sQ]S/Er
/** pc<A ,?
* @param data O.+X,CQG*
* @param l T13Jno
* @param i Fv9n>%W&
*/ j0[9Cj^%c
private void insertSort(int[] data, int start, int len) { '} LAZQ"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 8VZLwhj
} 00@y,V_]
} D$y-Kh
} D[}qhDlX
} Oe}6jcb6&
v"G)G)*z
堆排序： ]Q0+1'yuK
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package org.rut.util.algorithm.support; :0B' b
Ndr4e?Xa,
import org.rut.util.algorithm.SortUtil; m;KD@E!
Nb@zn0A(;
/** 6)~J5Fb
* @author treeroot %{M&"Mv
* @since 2006-2-2 . 'rC'FT
* @version 1.0 }Ii5[nRN
*/ z gDc=
public class HeapSort implements SortUtil.Sort{ \4|o5,+(@
h*\/{$y
/* (non-Javadoc) Yn }Ivg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AjA.="3
*/ x>=8~wIK
public void sort(int[] data) { uKocEWB=/F
MaxHeap h=new MaxHeap(); w>ap8><4
h.init(data); Sx3R2-!Z
for(int i=0;i h.remove(); ==pGRauq
System.arraycopy(h.queue,1,data,0,data.length); {y k0Zef_
} nJ-U*yz
{Jj vF
private static class MaxHeap{ 9n#Em
Iib39?D W
void init(int[] data){ z(&~O;;N#
this.queue=new int[data.length+1]; k3wAbGp
for(int i=0;i queue[++size]=data; oCftI':@
fixUp(size); >AT T<U=
} `upxM0gc
} A(Ss:7({
x:O;Z~ |.
private int size=0; ry%Fs&V*>
oj1,DU
private int[] queue; ;<=B I!
h!L6NS_Q,
public int get() { e):rr*
return queue[1]; rpu{YC1C%
} u`2[V4=L
9cm9;
public void remove() { eBW=bK~[VP
SortUtil.swap(queue,1,size--); 6X@$xe847[
fixDown(1); =,-&h V
} 41[1_p(
file://fixdown `:I<Jp
private void fixDown(int k) { igD,|YSK`z
int j; Dqw?3 KB
while ((j = k << 1) <= size) { 3 O)^Hq+9
if (j < size %26amp;%26amp; queue[j] j++; FX#fh 2
if (queue[k]>queue[j]) file://不用交换 >$yqx1=jW
break; cj!Ew}o40D
SortUtil.swap(queue,j,k); "/zIsn7
k = j; <+oTYPgD9
} NdW2OUxw"
} eaxp(VX?oy
private void fixUp(int k) { :sY pZX1
while (k > 1) { uzx?U3.\
int j = k >> 1; 2/c^3[ccR
if (queue[j]>queue[k]) rIt#ps
break; _8U 5mW
SortUtil.swap(queue,j,k); Oa'DVfw2J
k = j; l?N|Gj;ZFZ
} !A\Qwg>
} 2V1|b`b#4
DhAQ|SdCf
} bH-QF\>
fgW>U*.ar
} /*+P}__k
x dT1jI
SortUtil： U;7Cmti"
&pCNOHi|
package org.rut.util.algorithm; FKOTv2
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import org.rut.util.algorithm.support.BubbleSort; o-))R| ~z
import org.rut.util.algorithm.support.HeapSort; \C )S3!h
import org.rut.util.algorithm.support.ImprovedMergeSort; bk-veJR
import org.rut.util.algorithm.support.ImprovedQuickSort; R*l#[D5A
import org.rut.util.algorithm.support.InsertSort; W]]@pbG"H\
import org.rut.util.algorithm.support.MergeSort; =q%Q^
import org.rut.util.algorithm.support.QuickSort; z)RJUmY3B
import org.rut.util.algorithm.support.SelectionSort; %q~YJ*\
import org.rut.util.algorithm.support.ShellSort; I,*zZNvRi
ID-Y*
/** V6:S<A
* @author treeroot \lJCBb+k
* @since 2006-2-2 pQGlg[i2/
* @version 1.0 h&t/ L
*/ )<?^~"h
public class SortUtil { 'UYxVh9D
public final static int INSERT = 1; Md4hd#z
public final static int BUBBLE = 2; |4J ;s7us
public final static int SELECTION = 3; oTtJ]`T
public final static int SHELL = 4; \; 9log<Z
public final static int QUICK = 5; zz)[4G
public final static int IMPROVED_QUICK = 6; 59Lv/Mfy
public final static int MERGE = 7; e5g# a}
public final static int IMPROVED_MERGE = 8; =N62 ){{
public final static int HEAP = 9; )Vn(J#s
-W/Lg5eK
public static void sort(int[] data) { ^V1.Y
sort(data, IMPROVED_QUICK); Xjy5Yj
} ma +iIt;
private static String[] name={ ;;^OKrzWW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pk%%}tP<
}; TpB4VNi/<
St1Ny,$yU
private static Sort[] impl=new Sort[]{ N;YAG#'9~_
new InsertSort(), ^\ N@qL
new BubbleSort(), _~l*p"PL<
new SelectionSort(), ,2|(UTv
new ShellSort(), I"=a:q
new QuickSort(), 0eGz|J*7
new ImprovedQuickSort(), LU-,B?1
new MergeSort(), jkVX>*.|oy
new ImprovedMergeSort(), qZV.~F+
new HeapSort() 8h.Dc&V
}; hT=6XO od4
]O^C'GzZ
public static String toString(int algorithm){ L@|xpq
return name[algorithm-1]; lpy(un
} ul-A'
w1Xe9'$Qb
public static void sort(int[] data, int algorithm) { 6h5,XcO4
impl[algorithm-1].sort(data); z0jF.ub
} xJ);P.
mRECdGst
public static interface Sort { g'%^-S ]
public void sort(int[] data); ;Y^.SR"
} /c&;WlE/n
[T6MaP?
public static void swap(int[] data, int i, int j) { _Nx#)(x
int temp = data; * NB:"1x
data = data[j]; J"$Y`;
data[j] = temp; >Oz~j>jL
} #~I.F4
} mu>L9Z~(L_