[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; /E5 5Pec
} ~\3kx]^10
int i1=l; Z(_ZAB%+D
int i2=mid+1; *`Yv.=cd
for(int cur=l;cur<=r;cur++){ ;cz|ss=
if(i1==mid+1) Ox'/`Mppw
data[cur]=temp[i2++]; >P $;79<
else if(i2>r) /<8N\_wh
data[cur]=temp[i1++]; OdY=z!Fls
else if(temp[i1] data[cur]=temp[i1++]; Vy,^)]
else ;~u{56
data[cur]=temp[i2++]; k{$ ao
} {Gw.l."
} NDAw{[.%
#\ n8M
} 0#*#a13
] 0m&(9
改进后的归并排序: PF7&p~O(Z
JA_BKA
package org.rut.util.algorithm.support; 4bJZmUb
-,{-bi
import org.rut.util.algorithm.SortUtil; ]B]*/
]$\|ktY!
/** x5WW--YR+
* @author treeroot 4[-*~C|W5
* @since 2006-2-2 p6XtTx
* @version 1.0 fb:j%1WF
*/ /q$,'^.A
public class ImprovedMergeSort implements SortUtil.Sort { (?! ,p^
^~HQC*
private static final int THRESHOLD = 10; ?EK?b s
~ Yngkt
/* 13&0rLS
* (non-Javadoc) .eO?Z^
* h"[+)q%L
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) la?Wnw
*/ t/PlcV_M"
public void sort(int[] data) { TbF4/T1b
int[] temp=new int[data.length]; |xvy')(b
mergeSort(data,temp,0,data.length-1); 0% #<c p
} <ExZ:ip
3#45m+D
private void mergeSort(int[] data, int[] temp, int l, int r) { e=QK}gzX
int i, j, k; uH;-z_Wpn!
int mid = (l + r) / 2; :BGA.
if (l == r) D\YE^8/
return; @M8|(N%
if ((mid - l) >= THRESHOLD) 2JS`Wqy
mergeSort(data, temp, l, mid); Z0>DNmH*
else @hImk`&[N
insertSort(data, l, mid - l + 1); #vqo -y7@
if ((r - mid) > THRESHOLD) ([VV%ovZ
mergeSort(data, temp, mid + 1, r); lM[XS4/TRa
else b4""|P?L
insertSort(data, mid + 1, r - mid); q;wLa#4)J
"A)("
for (i = l; i <= mid; i++) { *I0-O*Xr
temp = data; rUjdq/I:Z
} oejfU;+$
for (j = 1; j <= r - mid; j++) { M}wXJ8aF?
temp[r - j + 1] = data[j + mid]; 5 VA(tzmCt
} q0bHB_|wL
int a = temp[l]; ?`Y\)'}
int b = temp[r]; <x),,a=X
for (i = l, j = r, k = l; k <= r; k++) { :g\rQazxO
if (a < b) { LR,7,DH$9'
data[k] = temp[i++]; gxGrspqg
a = temp; kzS=g|_
} else { ^v@4|E$
data[k] = temp[j--]; F("#^$
b = temp[j]; [|3>MZ2/
} 92'wkS
} KYxBVgJ
} GBC*>Y
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/** io3yLIy,
* @param data *+b6B_u]
* @param l <p?&udqD
* @param i -sMytHH.
*/ 8g>b
private void insertSort(int[] data, int start, int len) { [!VOw@uz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); U#o'H @
} 6R29$D|HFO
} *AIEl"29
} !"TZ:"VZU
} Bz`yfl2
)P>u9=?,=E
堆排序： D8# on!
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package org.rut.util.algorithm.support; pNE(n4v
jUqy8q&
import org.rut.util.algorithm.SortUtil; ?QDWuPhN
M'1!<a-Mp
/** j,2l8?
* @author treeroot da$BUAqU
* @since 2006-2-2 8%~t
* @version 1.0 +tN&a
*/ S2VVv$r_6
public class HeapSort implements SortUtil.Sort{ Q^Bt1C
D["MUB4l
/* (non-Javadoc) jRpdft
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2~;&g?T6
*/ @)8]e S7
public void sort(int[] data) { =qvZpB7ZZ
MaxHeap h=new MaxHeap(); w h$jr{
h.init(data); i(6J>^I
for(int i=0;i h.remove(); Kt.~aaG_
System.arraycopy(h.queue,1,data,0,data.length); ;#G%U!p
} sxED7,A
0D(cXzQP
private static class MaxHeap{ R& =f:sEi
8"vwU@cfC
void init(int[] data){ >LF&EM]
this.queue=new int[data.length+1]; ! qJI'+_
for(int i=0;i queue[++size]=data; e^$j5jV
fixUp(size); ELh3^
} kYxS~Kd<
} ER{3,0U
$'[q4wo<
private int size=0; \`xkp[C
*,\` o~
private int[] queue; XvSIWs
}+Vv0jX|V
public int get() { IdM*5Y>f
return queue[1]; YJ2ro-X
} []&(D_e"
9F+P@Kp
public void remove() { YbMssd2Yg
SortUtil.swap(queue,1,size--); J%dJw}
fixDown(1); Vul+]h[!h
} q3'o|pp
file://fixdown 0d\~"4 R
private void fixDown(int k) { f3 ]
int j; =`I?mn&
while ((j = k << 1) <= size) { 3,.% s
if (j < size %26amp;%26amp; queue[j] j++; -0,4egj3
if (queue[k]>queue[j]) file://不用交换 +EASAq
break; 8kW/DcLE
SortUtil.swap(queue,j,k); %TK&)Q% h5
k = j; O=jN&<rb
} w&lZ42(mF
} 5su.+4z\
private void fixUp(int k) { f(u&XuZ
while (k > 1) { ]RFdLV?
int j = k >> 1; g<[rH%\6fg
if (queue[j]>queue[k]) dA#{Cn;
break; $ehg@WK}.
SortUtil.swap(queue,j,k); v29G:YQe
k = j; "~p+0Xws9
} G+Dpma ]
} ;WI]vn
j.QHkI1.
} z*.v_Mx
"jZm0U$,*
} Qm);6X
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SortUtil： hswTn`f
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package org.rut.util.algorithm; XS0V:<+,
{~GR8 U
import org.rut.util.algorithm.support.BubbleSort; GFR!n1Hv
import org.rut.util.algorithm.support.HeapSort; u;n(+8sz
import org.rut.util.algorithm.support.ImprovedMergeSort; 1| xN%27>
import org.rut.util.algorithm.support.ImprovedQuickSort; |ft:|/^F&
import org.rut.util.algorithm.support.InsertSort; }h~'AM
import org.rut.util.algorithm.support.MergeSort; /= ^L iP
import org.rut.util.algorithm.support.QuickSort; 9!t4>
import org.rut.util.algorithm.support.SelectionSort; !O\X+#j
import org.rut.util.algorithm.support.ShellSort; $au2%NL
gEKO128
/** qB JRS'6'9
* @author treeroot XU#,Bu{
* @since 2006-2-2 /Antb6E
* @version 1.0 +?e}<#vd'?
*/ &LU'.jY
public class SortUtil { jpO38H0)
public final static int INSERT = 1; XZ:1!;
public final static int BUBBLE = 2; 9oq)X[
public final static int SELECTION = 3; ^"tqdeCb=
public final static int SHELL = 4; I>((o`
public final static int QUICK = 5; g[!Cj,
public final static int IMPROVED_QUICK = 6; gNa#|
public final static int MERGE = 7; hh&Js'd
public final static int IMPROVED_MERGE = 8; &N{zkMf
public final static int HEAP = 9; [~?M/QI9
?0npEz|
public static void sort(int[] data) { )Z:m)k>r;
sort(data, IMPROVED_QUICK); ~.Q4c*_b
} h3h8lt_|
private static String[] name={ P{lh)m>
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" j<$R4A1
}; f8!l7{2%q
P|N?OocE
private static Sort[] impl=new Sort[]{ 5<r)+?!n
new InsertSort(), y#r\b6
new BubbleSort(), 6{^*JC5nj
new SelectionSort(), cMtJy"kK
new ShellSort(), Mw|SH;nM
new QuickSort(), #KJZR{
new ImprovedQuickSort(), ' PL_~
new MergeSort(), s?<!&Y
new ImprovedMergeSort(), +UaO<L
new HeapSort() dP3VJ3+ %
}; d H_2o
oUS,+e
public static String toString(int algorithm){ 8OBF^r44R
return name[algorithm-1]; g*r/u;
} STp!8mL
5V rcR=?O
public static void sort(int[] data, int algorithm) { W^ClHQ"Iy
impl[algorithm-1].sort(data); `1_FQnm)
} *(VbPp_H_
^8\Y`Z0%
public static interface Sort { DJJZJ}7
public void sort(int[] data); YlB["@\[B
} 5@.zz"o.`
0hZxN2r
public static void swap(int[] data, int i, int j) { >%i9oI<)
int temp = data; Dtt\~m;AR
data = data[j]; j@V$Mbv
data[j] = temp; \#_@qHAG
} n%U9iwJ.
} UNY@w=]<