[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; p-MQI }
} <^OGJ}G
int i1=l; }[?X%=
int i2=mid+1; gryC#
for(int cur=l;cur<=r;cur++){ mR?OSeeB
if(i1==mid+1) R$wo{{KX
data[cur]=temp[i2++]; 3]/w3|y
else if(i2>r) t hTY('m
data[cur]=temp[i1++]; izOtt^#DZt
else if(temp[i1] data[cur]=temp[i1++]; t4 $cMf
else 4WU 6CN
data[cur]=temp[i2++]; Z-Zox-I1}-
} ,253'53W)
} !c'a<{d@
k(!#^Mlz[
} kC6J@t)
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改进后的归并排序: ,}F{V>dhn
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package org.rut.util.algorithm.support; /id(atiF^
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import org.rut.util.algorithm.SortUtil; |Kh#\d
bv-s}UP0
/** ps^Z)x`GV
* @author treeroot sYgpK92
* @since 2006-2-2 PudwcP{
* @version 1.0 ,\xeNUZd
*/ 8.F]&D0p8
public class ImprovedMergeSort implements SortUtil.Sort { ' !ZFK}
T^%$
private static final int THRESHOLD = 10; 02SFFqm
$D<LND=o=
/* _L<IxOZh+
* (non-Javadoc) FNtcI7
* 44]/rP_m
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 9^x'x@6
*/ ['e8Xz0
public void sort(int[] data) { e%u1O-*
int[] temp=new int[data.length]; WR%x4\,d#
mergeSort(data,temp,0,data.length-1); 0Evq</
} fMP$o3;
;WWUxrWif
private void mergeSort(int[] data, int[] temp, int l, int r) { VYMs`d[
int i, j, k; TlQu+w|
int mid = (l + r) / 2; s^)wh v`C
if (l == r) d>VerZZU
return; ,FlF.pt
if ((mid - l) >= THRESHOLD) #iJ+}EW _
mergeSort(data, temp, l, mid); ;gP@d`s
else XN'x`%!*3#
insertSort(data, l, mid - l + 1); 2a3i]e5Kt
if ((r - mid) > THRESHOLD) s:~3|D][
mergeSort(data, temp, mid + 1, r); #0zMPh /U}
else ej4xW~_
insertSort(data, mid + 1, r - mid); 3T+#d-\
/:~mRf^
for (i = l; i <= mid; i++) { _r^Cu.[7
temp = data; y?zNxk/p
} ZEiW\ V
for (j = 1; j <= r - mid; j++) { S8TJnv`?'
temp[r - j + 1] = data[j + mid]; ]9pK^<
} $2~I-[
int a = temp[l]; f4@>7K]9TA
int b = temp[r]; 0V}knR.l
for (i = l, j = r, k = l; k <= r; k++) { 'x$>h)t]
if (a < b) { b<u
data[k] = temp[i++]; CuR.a
a = temp; 9|jk=`4UK
} else { Z^zUb
data[k] = temp[j--]; Tky\W%Ag
b = temp[j]; >j%HVRW
} j,?>Q4G
} TO ^}z
} o4^rE<vJ
%3M1zZY
/** H.3+5po
* @param data A'^y+42jY
* @param l 8vjaQ5
* @param i D~P I_*h.
*/ fo;Ftf0
private void insertSort(int[] data, int start, int len) { no~hYyW2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 5|._K(M
} f5.rzrU
} 60ccQ7=
} #T &z`
} qv>?xKSm
wxYB-Wh<
堆排序： $[x2L s~
j-e/nZR@
package org.rut.util.algorithm.support; |j3mI\ANF
aY&He~
import org.rut.util.algorithm.SortUtil; @8a1a3_F
|1iCt1~U
/** z~i=\/~tZ
* @author treeroot Yx>y(Whu.
* @since 2006-2-2 16Ym*kWIps
* @version 1.0 V<A_c^unO
*/ EdbLAagI6
public class HeapSort implements SortUtil.Sort{ ;4tmnC>OnA
M@ t,P?
/* (non-Javadoc) >1 {V
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 8FYcUvxfT
*/ 8VxjC1v+
public void sort(int[] data) { r\-Mj\$-
MaxHeap h=new MaxHeap(); KjFNb;mM
h.init(data); n#8N{ya5x1
for(int i=0;i h.remove(); w7GF,a
System.arraycopy(h.queue,1,data,0,data.length); ;j|T#-.
} O{:_-eI&d
O4H %x
private static class MaxHeap{ k<x %
fbgq+f`\
void init(int[] data){ c 4xh
this.queue=new int[data.length+1]; gb:)t}|
for(int i=0;i queue[++size]=data; >T: Yp<
fixUp(size); %P05k
} 6P@3UQ)}s
} s wgn( -
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private int size=0; tai
Hry*.s -
private int[] queue; j[2?}?
EA_6L\+8&
public int get() { o0t/
return queue[1]; C QO gR GW
} YbjeM6#E
BIyNiol$AJ
public void remove() { s2s}5b3
SortUtil.swap(queue,1,size--); ZtG5vdf
fixDown(1); 94Wf ]
} rN* ,U\q
file://fixdown H%2Y8}
private void fixDown(int k) { aM/sD=}
int j; B^`'2$3
while ((j = k << 1) <= size) { 5[NF
if (j < size %26amp;%26amp; queue[j] j++; nW?DlECo?
if (queue[k]>queue[j]) file://不用交换 T <J%|d .'
break; woIcW
SortUtil.swap(queue,j,k); 0=]RG
k = j; U6SgV 8
} 57W4E{A
} mqPV Eo
private void fixUp(int k) { ,2hZtJ<A
while (k > 1) { ;`ZGiax
int j = k >> 1; Id-?her>B
if (queue[j]>queue[k]) V0yQ
break; TXx%\V_6
SortUtil.swap(queue,j,k); B]jI^(P
k = j; >:7W.QLRU
} _h;#\ )%~
} jn[%@zD}
V$e\84<
} :$eg{IXC"
haj\Dm
} G+Vlaa/7
>(>Fx\z}
SortUtil： 1%W|>M`
h!#!}|Q'
package org.rut.util.algorithm; r2,AZ+4FP
OFS`?>
import org.rut.util.algorithm.support.BubbleSort; ]u~6fknm
import org.rut.util.algorithm.support.HeapSort; 6uWzv~!*D
import org.rut.util.algorithm.support.ImprovedMergeSort; CH h]v.V
import org.rut.util.algorithm.support.ImprovedQuickSort; Ga o(3Y
import org.rut.util.algorithm.support.InsertSort; /y2upu*!
import org.rut.util.algorithm.support.MergeSort; sA6Ku(9
import org.rut.util.algorithm.support.QuickSort; \g|u|Y.2[
import org.rut.util.algorithm.support.SelectionSort; ;-Bi~XD
import org.rut.util.algorithm.support.ShellSort; 9D 2B8t"a
%\xwu(|kN
/** yj]\%3o<Z7
* @author treeroot c o}o$}
* @since 2006-2-2 4.@gV/U(|
* @version 1.0 I^'U_"vB
*/ >we/#C"x
public class SortUtil { [Tv!Pc
public final static int INSERT = 1; 8!e1T,:b
public final static int BUBBLE = 2; `a.1Af;L
public final static int SELECTION = 3; ~i&Lc7Xl
public final static int SHELL = 4; E2f9J{Ki=
public final static int QUICK = 5; ?<@yo&)
public final static int IMPROVED_QUICK = 6; bY6y)l
public final static int MERGE = 7; 5~WMb6/
public final static int IMPROVED_MERGE = 8; Q{9#Am^6w
public final static int HEAP = 9; \W73W_P&g
H}KJd5A7
public static void sort(int[] data) { !wl3}]q
sort(data, IMPROVED_QUICK); (bP\_F5D
} e%#8]$
private static String[] name={ /W !A^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" w`~j(G4N
}; Rb_HD
Epm'u[wV
private static Sort[] impl=new Sort[]{ ;jb+x5t
new InsertSort(), 'IrwlS
new BubbleSort(), \]AsL&
new SelectionSort(), [&mYW.O<
new ShellSort(), J(&a,w>p
new QuickSort(), kzs}U'U
new ImprovedQuickSort(), m<ZwbD
new MergeSort(), nLZT3`@~,
new ImprovedMergeSort(), =\IcUY,4
new HeapSort() VU>s{_|{
}; mtEE,O!+
*.ffyBI*~
public static String toString(int algorithm){ ^FLuhLS\*
return name[algorithm-1]; 7 R1;'/;
} Z4#lZS`'A
/uSEG<D
public static void sort(int[] data, int algorithm) { 'WH@Zk/l
impl[algorithm-1].sort(data); M5OH-'
} w+vYD2a
d7o~$4h|
public static interface Sort { kTQ`$V(>&
public void sort(int[] data); 'ad|@Bh
} h%kB>E~
G7lC'~}
public static void swap(int[] data, int i, int j) { N"~P` H![x
int temp = data; 7QiJ1P.z
data = data[j]; % ~%>3
data[j] = temp; H9)$ #r6i
} K%h83tm+
} Q"]C"?