[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; 0s.4]Zg>5
} Qk^}
int i1=l; ork{a.1-_w
int i2=mid+1; 2$gFiZ
for(int cur=l;cur<=r;cur++){ t"6u
if(i1==mid+1) EV~?]Kt~
data[cur]=temp[i2++]; 5%DHF-W)
else if(i2>r) 8JO(P0aT
data[cur]=temp[i1++]; n|PW^kOE/
else if(temp[i1] data[cur]=temp[i1++]; ASNo6dP7
else >DW%i\k1V~
data[cur]=temp[i2++]; <*p
} H#bu3*'
} F+V[`w*k
BkDq9>
} CTc#*LJx>j
t1aKq)?
改进后的归并排序: ay=f1<a
HA0yX?f]
package org.rut.util.algorithm.support; h:vI:V[/X
y!\q', F
import org.rut.util.algorithm.SortUtil; D,s[{RW+q
B{1yMJA
/** _^^5
* @author treeroot 6V1 Z(K
* @since 2006-2-2 }oii|=,#^
* @version 1.0 ?j} Fxr
*/ qPCI@5n3T?
public class ImprovedMergeSort implements SortUtil.Sort { az Oib=3fz
V#+J4
private static final int THRESHOLD = 10; f:9qId ;/M
L!2Ef4,wAz
/* 0#F<JsO|u
* (non-Javadoc) "04:1J`
* M5]$w]Ny9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 5eas^Rm
*/ lq27^K
public void sort(int[] data) { W1Om$S1
int[] temp=new int[data.length]; '_xa>T}
mergeSort(data,temp,0,data.length-1); }i\_`~
} JZD&u6tB
&|Vzo@D(!
private void mergeSort(int[] data, int[] temp, int l, int r) { Zg >!5{T
int i, j, k; g^:7mG6C
int mid = (l + r) / 2; o(xt%'L`t
if (l == r) vu/P"?F
return; LeMo")dk\
if ((mid - l) >= THRESHOLD) jL~. =QD
mergeSort(data, temp, l, mid); 0O?!fd n
else f<@`{oP@
insertSort(data, l, mid - l + 1); $`/F5R!
if ((r - mid) > THRESHOLD) jt&rOPL7
mergeSort(data, temp, mid + 1, r); vLM-v
else diF2:80o
insertSort(data, mid + 1, r - mid); 5VlF\-
Vj_z"t7q
for (i = l; i <= mid; i++) { T'VKZ5W
temp = data; TK%MVLTK
} 5U(ry6fI=
for (j = 1; j <= r - mid; j++) { K.6xNQl{}
temp[r - j + 1] = data[j + mid]; O,7*dniH
} H=_k|#/
int a = temp[l]; Eb\SK"8
int b = temp[r]; IN!IjInaT@
for (i = l, j = r, k = l; k <= r; k++) { Je~<2EsQ
if (a < b) { ~ponYc.Y
data[k] = temp[i++]; .BZ3>]F3<
a = temp; Uj~ :|?Wz
} else { 1?T^jcny:M
data[k] = temp[j--]; 6XGqZ!2
b = temp[j]; h)yAge
} j}$Q`7-wB1
} }Ym~[S*x
} BoPJ;6?>}
B,ZLX/c9
/** 4>(OM|X=9
* @param data 5> =Ia@I
* @param l ZDl(q~4?z
* @param i @jH8x!5u:
*/ .cg"M0
private void insertSort(int[] data, int start, int len) { _gP-$&JC
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); VW\~OH
} 7j\jOklV
} N>+L?C
} \-)augq([
} [+4--#&{
&V7{J9
堆排序： /9soUt
_cXLQ)-
package org.rut.util.algorithm.support; w]VdIS
z T#j.v
import org.rut.util.algorithm.SortUtil; rfc;
KN zm)O
/** iY4FOt7\
* @author treeroot NxQ+z^o\
* @since 2006-2-2 pL)o@-k#%
* @version 1.0 {!7 ^w
*/ +"2IQme5
public class HeapSort implements SortUtil.Sort{ i^u5j\pfY*
(8OaXif
/* (non-Javadoc) EU-=\Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) TZ%u;tBH:
*/ iMr/i?`i
public void sort(int[] data) { O[#pB. 4
MaxHeap h=new MaxHeap(); MzO4Yv"A
h.init(data); Ue)8g#
for(int i=0;i h.remove(); Z3 $3zyi
System.arraycopy(h.queue,1,data,0,data.length); &5F@u IA
} 7\1bq&a<
R} aHo0r
private static class MaxHeap{ <hbxerg
MUU9IMFJ
void init(int[] data){ dzPwlCC%-
this.queue=new int[data.length+1]; Ok&u4'<
for(int i=0;i queue[++size]=data; `l8^n0-
fixUp(size); Upkw.`D`
} 6@@J>S>
} H{3A6fb<
]za1=~[
private int size=0; AT4G]pT
7'9~Kx&+
private int[] queue; Iz<}>J B
AHre#$`97
public int get() { L0O},O
return queue[1]; 7-hSso.'
} 8_@#5
hE"a(i
public void remove() { _PeBV<
SortUtil.swap(queue,1,size--); NbtNu$%t
fixDown(1); O7z-4r
} U`fxe`nVa
file://fixdown ]Kb3'je
private void fixDown(int k) { Jr4^@]78o<
int j; p%v+\T2r
while ((j = k << 1) <= size) { RvT>{G~
if (j < size %26amp;%26amp; queue[j] j++; C!8XFf8e
if (queue[k]>queue[j]) file://不用交换 5ZkMd!$y
break; {]w@s7E
SortUtil.swap(queue,j,k); Vg)]F+E
k = j; RRGCO+)*
} `_{^&W WS
} *MFsq}\ $
private void fixUp(int k) { T6g(,xPcL
while (k > 1) { O67.DEu^
int j = k >> 1; vUXas*s4
if (queue[j]>queue[k]) cR+9^DzA
break; b^Xq(q>5
SortUtil.swap(queue,j,k); HJ2r~KIw
k = j; ?=;dNS@i@
} OJL?[<I
} /M;A)z
MR@*09zP(?
} {-(B
=gb.%a{R
} Ol9'ZB|R
wtDy-H n
SortUtil： C1@6r%YD
<-:gaA`KM
package org.rut.util.algorithm; |3?qL
O)qedy*&
import org.rut.util.algorithm.support.BubbleSort; p9[J9D3~
import org.rut.util.algorithm.support.HeapSort; \)?[1b&[_
import org.rut.util.algorithm.support.ImprovedMergeSort; \?_eQKiZ3
import org.rut.util.algorithm.support.ImprovedQuickSort; K 5SHt'P
import org.rut.util.algorithm.support.InsertSort; d&x1uso%L
import org.rut.util.algorithm.support.MergeSort; 5};Nv{km^2
import org.rut.util.algorithm.support.QuickSort; )kSE5|:pi
import org.rut.util.algorithm.support.SelectionSort; b=!G3wVw<
import org.rut.util.algorithm.support.ShellSort; mV0.9pxS
p}j$p'D.RI
/** n)(E 0h
* @author treeroot 4{d!}R
* @since 2006-2-2 JR1/\F<}
* @version 1.0 2V0gj /&
*/ 4|*H0}HOm
public class SortUtil { MH+t`/E0]
public final static int INSERT = 1; h-Q3q:
public final static int BUBBLE = 2; , wT$L3
public final static int SELECTION = 3; 4%TY` II
public final static int SHELL = 4; fCL5Et
public final static int QUICK = 5; &xlz80%
public final static int IMPROVED_QUICK = 6; *OT6)]|k
public final static int MERGE = 7; -o\r]24
public final static int IMPROVED_MERGE = 8; 2L~[dn.s
public final static int HEAP = 9; j"aimjqd3
ei>8{v&g
public static void sort(int[] data) { w6MEY"<L
sort(data, IMPROVED_QUICK); G(-1"7
} *5bKJgwJ
private static String[] name={ c[4H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !Qu)JR
}; /XG4O
iD)R*vnAi
private static Sort[] impl=new Sort[]{ ^@'LF T)
new InsertSort(), oW*e6"<R7
new BubbleSort(), jjgjeY
new SelectionSort(), w1-/U+0o
new ShellSort(), .R/`Y)4
new QuickSort(), |@]`" k
new ImprovedQuickSort(), \lVxlc0{?
new MergeSort(), `b^eRnpR
new ImprovedMergeSort(), P%8zxU;
new HeapSort() %,-oxeM1u
}; ^w eU\
@tvAI2W
public static String toString(int algorithm){ ]g jhrD
return name[algorithm-1]; )vB,eZq
} }| BnG"8
,4hQ#x
public static void sort(int[] data, int algorithm) { ^[{\ZX
impl[algorithm-1].sort(data); m"P"iK/Av(
} 5Uc!;Gd?b
rULrGoM
public static interface Sort { w\U fq
public void sort(int[] data); }VlX!/42
} Yl[GO}M
ALqP;/
public static void swap(int[] data, int i, int j) { /F;b<kIy8
int temp = data; 75j`3wzu
data = data[j]; %a;N)1/
data[j] = temp; :zk69P3
} __\Tv>Y
} s)dN.'5/