[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; CdasP9"1
} P<l&0dPO8
int i1=l; t]y D-3'l&
int i2=mid+1; TD1 [
for(int cur=l;cur<=r;cur++){ i5Zk_-\#H
if(i1==mid+1) C~nzH,5
data[cur]=temp[i2++]; "x=f=;
else if(i2>r) !/}O>v~o
data[cur]=temp[i1++]; =Z P%mW&;}
else if(temp[i1] data[cur]=temp[i1++]; ?ooe'V@
else wfU7G[
data[cur]=temp[i2++]; l>Z5 uSG
} .z)%)PVV
} w[9|cgCY
PZE0}>z
} 0Fk5kGD,&K
:*ing
改进后的归并排序: 56+s~hG
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package org.rut.util.algorithm.support; NLUT#!Gr
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import org.rut.util.algorithm.SortUtil; jGXO\:sO
;i Fz?d3;
/** !lf|7
* @author treeroot fBRo_CU8!
* @since 2006-2-2 4]h =yc R
* @version 1.0 ^HV>`Pjd}=
*/ (eCJ;%%k
public class ImprovedMergeSort implements SortUtil.Sort { }`W){]{kO
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private static final int THRESHOLD = 10; @x"0_Qw
LV\DBDM
/* GB>QK
* (non-Javadoc) rs,2rSsg!
* +Vm}E0Ov
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2q3+0Et8
*/ )Y2{_ bx4"
public void sort(int[] data) { MS\>DW
int[] temp=new int[data.length]; !G SV6
mergeSort(data,temp,0,data.length-1); v%"|WV[N
} 85n1eE
Pl=ZRKn
private void mergeSort(int[] data, int[] temp, int l, int r) { R%Q@
int i, j, k; b~'"^ Bts*
int mid = (l + r) / 2; PV9pa/`@
if (l == r) `S6x<J&T\/
return; Sx?ua<`:d
if ((mid - l) >= THRESHOLD) jp0<pw_
mergeSort(data, temp, l, mid); r30 <(nF
else <\NY<QIwFw
insertSort(data, l, mid - l + 1); B$b +Ymu
if ((r - mid) > THRESHOLD) in~D
mergeSort(data, temp, mid + 1, r); '+osf'&
else )3~{L;q
insertSort(data, mid + 1, r - mid); 7w'wjX-
ep2k%?CX 1
for (i = l; i <= mid; i++) { p3 w
temp = data; ptDY3n~'
} BRlT7grgq
for (j = 1; j <= r - mid; j++) { 2^^`n1?'
temp[r - j + 1] = data[j + mid]; 9?0^ap,T
} ``ou/Z
int a = temp[l]; vg3=8>#
int b = temp[r]; +)y^'Qs
for (i = l, j = r, k = l; k <= r; k++) { /lo2y?CS*
if (a < b) { k9L?+PD
data[k] = temp[i++]; U@-^C"R
a = temp; (vb SM}P
} else { }oL'8-y
data[k] = temp[j--]; ~ ip,Nl
b = temp[j]; ^c&L,!_)H
} #a<Gxj
} kO|L bQ@=q
} bsB*533
9\/xOwR
/** f7=((5N
* @param data NMa} <
* @param l p(~Yx3$*
* @param i i(iXD
*/ "f "6]y
private void insertSort(int[] data, int start, int len) { o| #Qu8Lk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); BaSZ71>9]r
} H`0|tepz
} DV _2P$tT|
} XzIl`eH
} f ` R/ i
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堆排序： B5X(ykaX~
f6p-s y>
package org.rut.util.algorithm.support; &Rvm>TC=
1XD,uoxB
import org.rut.util.algorithm.SortUtil; a{R%#e\n
P%#<I}0C
/** Z@3i$8
* @author treeroot ynE)Xdh
* @since 2006-2-2 kP-3"ACG
* @version 1.0 7PtN?;rP
*/ ^R# E:3e
public class HeapSort implements SortUtil.Sort{ I~ok4L?VB
zxC#0@qX07
/* (non-Javadoc) E;+O($bA
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) LN@F+CyDc
*/ |NpP2|4h
public void sort(int[] data) { Zg'Q>.:
MaxHeap h=new MaxHeap(); XDFx.)t
h.init(data); ~zJ?H<>
for(int i=0;i h.remove(); Ib+Y~ XYR
System.arraycopy(h.queue,1,data,0,data.length); y#q?A,C@n
} b)=[1g/=L
Kjs.L!W
private static class MaxHeap{ MM(xk
X4 A<[&F/
void init(int[] data){ q U]gj@R
this.queue=new int[data.length+1]; kzt(i Y_6
for(int i=0;i queue[++size]=data; 8C67{^`::
fixUp(size); 9Hf9VC3
} v"#mzd.tW
} X22[tqg;&
k +H3Bq
private int size=0; (=* cK-3
R,pX:H&#+
private int[] queue; TrLu~4
U$_xUG
public int get() { ~ xft
return queue[1]; >D(RYI
} +\F'iAs@
\lZf<f
public void remove() { bdQ_?S(
SortUtil.swap(queue,1,size--); d` jjGEj
fixDown(1); qzf!l"bT
} 2T V X)q<\
file://fixdown m^GJuPLW
private void fixDown(int k) { Si6al78
int j; LIZRoG8
while ((j = k << 1) <= size) { ha(Z<
if (j < size %26amp;%26amp; queue[j] j++; M#As0~y
if (queue[k]>queue[j]) file://不用交换 ] :BX!<
break; sB c (gr
SortUtil.swap(queue,j,k); Q\ U:~g3
k = j; iZaI_\"__
} !f&Kf,#b`
} :=wTvz
private void fixUp(int k) { "a8j"lPJ
while (k > 1) { r=X}%~_8X
int j = k >> 1; qoj$]
if (queue[j]>queue[k]) DGAX3N;r6{
break; [^U#Qj)hL
SortUtil.swap(queue,j,k); eS<lwA_
k = j; @8;W\L$~1
} /J:bWr
} BV>\ McI+
.pN`;*7`
} 0},PJ$8x
[&&1j@LQ*
} m0cP(
rzh#CnL3
SortUtil： ML( Eo
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package org.rut.util.algorithm; MD|5 ol9
;S57w1PbVA
import org.rut.util.algorithm.support.BubbleSort; &:,dJ
import org.rut.util.algorithm.support.HeapSort; jF=gr$
import org.rut.util.algorithm.support.ImprovedMergeSort; 1DvR[Lx%
import org.rut.util.algorithm.support.ImprovedQuickSort; p' +
import org.rut.util.algorithm.support.InsertSort; ds?v'|
import org.rut.util.algorithm.support.MergeSort; lJE93rXU
import org.rut.util.algorithm.support.QuickSort; 59O?_F9
import org.rut.util.algorithm.support.SelectionSort; WIv?}gi: X
import org.rut.util.algorithm.support.ShellSort; }RwSp!}C
XI22+@d6
/** Kd=%tNp
* @author treeroot ? P( ZA
* @since 2006-2-2 BI $
* @version 1.0 m3mp/g.>
*/ !!`!|w
public class SortUtil { "QWq_R
public final static int INSERT = 1; )tl.s)"N
public final static int BUBBLE = 2; +TQ47Zc
public final static int SELECTION = 3; hA33K #bC
public final static int SHELL = 4; TJ1+g \
public final static int QUICK = 5; M $Es%
public final static int IMPROVED_QUICK = 6; .8P.)%
public final static int MERGE = 7; JvT"bZk(o
public final static int IMPROVED_MERGE = 8; .R9IL-3fO
public final static int HEAP = 9; [BT/~6ovrZ
Qt/8r*Oe
public static void sort(int[] data) { Z| V`B `
sort(data, IMPROVED_QUICK); Vv8jEZ8
} V( -mD
private static String[] name={ *{yK 8
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {6~l$
}; T)Y=zIQ1]7
j& <i&
private static Sort[] impl=new Sort[]{ 6Qx#%,U^ J
new InsertSort(), 8'f4 Od ?
new BubbleSort(), IiZ&Pr
new SelectionSort(), -mRA#
new ShellSort(), ,;(PwJe
new QuickSort(), SL;9Q[
new ImprovedQuickSort(), ~d6DD;`K
new MergeSort(), "Q?k'^@
new ImprovedMergeSort(), l"2OP6d
new HeapSort() `g6h9GC6
}; uvV;Mlo]
v0YG,)_
public static String toString(int algorithm){ R8T]2?Q1
return name[algorithm-1]; '*k'i;2/1
} tWoh''@#
;d'Z|H;
public static void sort(int[] data, int algorithm) { m q{];
impl[algorithm-1].sort(data); rORZerM
} d\ ~QBr?
dVFf.
public static interface Sort { ODC8D>ZYl
public void sort(int[] data); tX"Th'Qi
} ,I_^IitN
k:#P|z$UD
public static void swap(int[] data, int i, int j) { ,iv|Pq$!
int temp = data; ")!,ZD
data = data[j]; #*g5u{k'P
data[j] = temp; `zE}1M%y
} %LZ({\5K#f
} e&qh9mlE