[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; [#14atv
} P;A"`Il
int i1=l; N\xqy-L9
int i2=mid+1; D* Vr)J
for(int cur=l;cur<=r;cur++){ *y`^Fc
if(i1==mid+1) ?+dI/jB4X
data[cur]=temp[i2++]; &5zUk++
else if(i2>r) i5-V$Qh
data[cur]=temp[i1++]; gA.G:1v
else if(temp[i1] data[cur]=temp[i1++]; W_kJb
else YDDwvk H
data[cur]=temp[i2++]; ;rk}\M$+
} /'ybl^Km
} (*hA0&n
]YwIuz6]
} Y`c\{&M6
=0m[
改进后的归并排序: o_={xrmIA
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package org.rut.util.algorithm.support; dqG+hh^
gS"@P:wYzs
import org.rut.util.algorithm.SortUtil; {;z3$/JB
)V9$ P)
/** N%>/ e'(
* @author treeroot a0AIq44
* @since 2006-2-2 0w(<pNA
* @version 1.0 ~LkReQI
*/ r^Gl~sX
public class ImprovedMergeSort implements SortUtil.Sort { lW7kBCsz#
F,4Q
private static final int THRESHOLD = 10; &A%#LVjf
xb1)ZJH
/* 8xL-j2w
* (non-Javadoc) 8mx5K-/,y^
* a@m>S$S
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /T_tI R>
*/ X'iki4
public void sort(int[] data) { t}TtWI
int[] temp=new int[data.length]; SDTX0v
mergeSort(data,temp,0,data.length-1); $\0j:<o
} e6{/e+/R
I ][8[UZ
private void mergeSort(int[] data, int[] temp, int l, int r) { {V:?r
int i, j, k; oYOf<J
int mid = (l + r) / 2; %s<7|,
if (l == r) E%+V\ W%
return; `[Lap=.'.
if ((mid - l) >= THRESHOLD) -4X,x
mergeSort(data, temp, l, mid); \Z57UNI
else UVU}
insertSort(data, l, mid - l + 1); ^3*gf}
if ((r - mid) > THRESHOLD) +F 5Dc
mergeSort(data, temp, mid + 1, r); (<1DPpy95O
else ]=h Ts%]w
insertSort(data, mid + 1, r - mid); tT'd]
`&0?e-
for (i = l; i <= mid; i++) { Wx:_F;
temp = data; Gb~q:&IUr
} ZwG+rTW
for (j = 1; j <= r - mid; j++) { |a'Q^aT
temp[r - j + 1] = data[j + mid]; iiRK3m
} Fbk<qQH
int a = temp[l]; y(N-1
int b = temp[r]; BPi>SI0
for (i = l, j = r, k = l; k <= r; k++) { R2M,VK?Wx
if (a < b) { 8f29Hj+
data[k] = temp[i++]; E1VCm[j2
a = temp; ?F`lI""E
} else { H&%=>hyX
data[k] = temp[j--]; fpoH7Jd V
b = temp[j]; J-u,6c
} l:faI&o.@
} Sw(%j1uL
} '}XW
c*\^61T
/** yv'mV=BMJ!
* @param data k&^Megcb
* @param l u5idH),<
* @param i `cZG&R
*/ uomFE(
private void insertSort(int[] data, int start, int len) { '^P Ud`
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); w*bVBuXs
} 0<i~XN0g
} o AQ92~b
} 0.+iVOz+Y
} s?_b[B d
iUl{_vb
堆排序： XFBk:~}sI
oWJ}]ip
package org.rut.util.algorithm.support; ifBJ$x(B.
6aK%s{%3s
import org.rut.util.algorithm.SortUtil; hefV0)4K
_X@:-_
/** MjG.Ili$m
* @author treeroot !!` zz
* @since 2006-2-2 2$3BluK
* @version 1.0 Mzb_o2^(
*/ O;,k~
public class HeapSort implements SortUtil.Sort{ sIELkF?.
{CGk5`g~
/* (non-Javadoc) ?xeq*<qfI
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2TAy'BB;)
*/ _q8s 7H
public void sort(int[] data) { FtF!Dtv
MaxHeap h=new MaxHeap(); =z@'vu$Fh
h.init(data); ";>D0h^D
for(int i=0;i h.remove(); Ye )(9
System.arraycopy(h.queue,1,data,0,data.length); 8#oF7eE
} iPkG=*Ip(%
] c'owj
private static class MaxHeap{ PUlb(3p `
B,gQeW&
void init(int[] data){ o}Xp-P
this.queue=new int[data.length+1]; 2y<d@z:K
for(int i=0;i queue[++size]=data; =%RDT9T.
fixUp(size); |-e=P9,
} eueXklpg+
} mCq*@1Lp9
bH,Jddc
private int size=0; Je?V']lm
NgH%
private int[] queue; }f({03$
tG#F7%+E
public int get() { Kfj*#)SZ
return queue[1]; 525xm"Bs
} fnXl60C%
s"Kp+tTWj
public void remove() { 7IIM8/BI
SortUtil.swap(queue,1,size--); :F<a~_k
fixDown(1); {'vvE3iZ
} xt`znNN
file://fixdown Ezml LFp.
private void fixDown(int k) { Ni0lj:
int j; bUWtlg
while ((j = k << 1) <= size) { mKn[>M1
if (j < size %26amp;%26amp; queue[j] j++; 0,/[r/=jT
if (queue[k]>queue[j]) file://不用交换 {'X"9@
break; 1r.q]^Pq~
SortUtil.swap(queue,j,k); >>!+Ri\@
k = j; O&X-)g=
} ;eA~z"g
} $/d~bk@=l
private void fixUp(int k) { bqLv81V
while (k > 1) { :m+:%keK
int j = k >> 1; Bq2}nDP
if (queue[j]>queue[k]) LLU>c]a
break; d3 N %V.w
SortUtil.swap(queue,j,k); 5aWKyXBIx
k = j; 8zY)0
} tdt6*
} ?jOpW1
RP(FV<ot
} C3memimN
)<Yy.Z_:DC
} jEI!t^#
.^v7LF]Q
SortUtil： \LS%bO,Y|
as\V, {<
package org.rut.util.algorithm; ~ 01]VA
GvVuFS>y
import org.rut.util.algorithm.support.BubbleSort; YE-kdzff
import org.rut.util.algorithm.support.HeapSort; 6!gGWn5>}
import org.rut.util.algorithm.support.ImprovedMergeSort; >! c^
import org.rut.util.algorithm.support.ImprovedQuickSort; SD697L9
import org.rut.util.algorithm.support.InsertSort; $hN!DHz
import org.rut.util.algorithm.support.MergeSort; , D&FCs%v
import org.rut.util.algorithm.support.QuickSort; nF//y}
import org.rut.util.algorithm.support.SelectionSort; =RV$8.Xp
import org.rut.util.algorithm.support.ShellSort; @lBH@HR=C
%ZZ}TUI W
/** ho:,~ A;k
* @author treeroot a<HM|dcst
* @since 2006-2-2 ^7_<rs
* @version 1.0 ?s_q|d_
*/ Lv5AtZl}
public class SortUtil { ^^%*2^
public final static int INSERT = 1; 7"S|GEs:
public final static int BUBBLE = 2; kPxrI=
public final static int SELECTION = 3; ;aFQP:l/
public final static int SHELL = 4; RnTPU`
public final static int QUICK = 5; O=+C Kx@
public final static int IMPROVED_QUICK = 6; *]H ./a:1
public final static int MERGE = 7; _R8-Hj E
public final static int IMPROVED_MERGE = 8; R2;-WxnN]
public final static int HEAP = 9; ~7Jc;y&
"oTwMU
public static void sort(int[] data) { J5l:_hZUV
sort(data, IMPROVED_QUICK); jwE<}y I
} xW^<.@Agm
private static String[] name={ oZzE.Q1T
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" xAoozDj
}; )_&<u\cm L
&2Y>yFB ,
private static Sort[] impl=new Sort[]{ =F:d#j>F
new InsertSort(), 9^}GUJy?
new BubbleSort(), GEvif4
new SelectionSort(), +^"|FtKhE
new ShellSort(), VWNmqeP
new QuickSort(), E@N_~1
new ImprovedQuickSort(), yC _X@o-n
new MergeSort(), Fs=nAn#
new ImprovedMergeSort(), *F9uv)[kz
new HeapSort() 1Ju{IEV
}; I)sCWC:Mq~
L'Wcb =;
public static String toString(int algorithm){ 8T2$0
return name[algorithm-1]; fY6&PuDf.
} &9O-!
\C>I6{
public static void sort(int[] data, int algorithm) { *D9QwQ _|
impl[algorithm-1].sort(data); )X7ZX#ttH
} mM95BUB
1 8&^k|
public static interface Sort { S]9xqiJW
public void sort(int[] data); &-{4JSII
} <ZnAPh
t<`BaU
public static void swap(int[] data, int i, int j) { ?HBc7$nW
int temp = data; DG& kY+
data = data[j]; MqNp*n2
data[j] = temp; i.'f<z$<
} XBDlQe|>
} AAs&wYp8Yh