[JAVA]用Java实现的各种排序

ヾ1.嗰rёn

级别: 终身会员

发帖: 3743

铜板: 8

人品值: 493

贡献值: 9

交易币: 0

好评度: 3746

信誉值: 0

金币: 0

所在楼道

只看楼主更多操作楼层直达

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; so1
} c$)>$&([
int i1=l; @aN~97 H\
int i2=mid+1; k%u fgHl!
for(int cur=l;cur<=r;cur++){ ^t71${w##
if(i1==mid+1) 5#x[rr{^*
data[cur]=temp[i2++]; nu:l;+,VY
else if(i2>r) `KLr!<i()
data[cur]=temp[i1++]; 9015PEO
else if(temp[i1] data[cur]=temp[i1++]; !-n*]C
else h?;03>6A&]
data[cur]=temp[i2++]; qc.TYp
} -K$ugDi
} ;qy;;usa
v!DK.PZbi
} #@w/S:KbJt
/=l!F'
改进后的归并排序: %-$ :/N
ZU0*iA
package org.rut.util.algorithm.support; As5l36
ZwY mR=
import org.rut.util.algorithm.SortUtil; E_$nsM8?
RrH{Y0
/** J#j3?qrxu
* @author treeroot kREFh4QO,
* @since 2006-2-2 =aQlT*n%3
* @version 1.0 m5] a
*/ hT_Q_1,
public class ImprovedMergeSort implements SortUtil.Sort { e2G;_:
Wi5Dl=
private static final int THRESHOLD = 10; 8 l= EL7
'byTM?Sp{
/* K0o${%'@7
* (non-Javadoc) 1#;^Z3
* x $[_Hix
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) SYQP7oG9oQ
*/ F4"bMN
public void sort(int[] data) { DnhbMxh8o
int[] temp=new int[data.length]; E@)'Z6r1
mergeSort(data,temp,0,data.length-1); [e_csQ
} a{}#t}
Y%y
private void mergeSort(int[] data, int[] temp, int l, int r) { 0t"Iq71/
int i, j, k; ~,)D n
int mid = (l + r) / 2; nFI<Te^)
if (l == r) =+?OsH v
return; @}waZ?'
if ((mid - l) >= THRESHOLD) 9C Ki$L
mergeSort(data, temp, l, mid); yA*U^:%
else .q:6F*,1M
insertSort(data, l, mid - l + 1); MT)q?NcG
if ((r - mid) > THRESHOLD) J{kS4v*J
mergeSort(data, temp, mid + 1, r); v+trHdSBYE
else Z5P4 H
insertSort(data, mid + 1, r - mid); L:?Ew9Lf
eTw9c }[
for (i = l; i <= mid; i++) { omPxU2Jw
temp = data; lk81IhI
} CK|AXz+EN
for (j = 1; j <= r - mid; j++) { 3m-g-
temp[r - j + 1] = data[j + mid]; p/7'r
} e0ni
int a = temp[l]; Uugq.'>
int b = temp[r]; 0Y0`$
for (i = l, j = r, k = l; k <= r; k++) { `)KGajB
if (a < b) { )Spa F)N8
data[k] = temp[i++]; Rg46V-"d,@
a = temp; XN?my@_HpM
} else { B`3z(a92S
data[k] = temp[j--]; ZWjje6
b = temp[j]; cH|J
} aZa1eE
} &m9= q|;m
} +7 j/.R
KjF8T7%
/** <HS{A$]
* @param data dNqj|Vu
* @param l eOXu^M>:F
* @param i 55] MRv
*/ n+<
private void insertSort(int[] data, int start, int len) { "WXUz
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C{G=Y[?oc
} #SI]^T|
} <m{#u4FC'
} _F4=+dT|
} KiE'O{Y
Hv:~)h$
堆排序： nG?Z* n
t%k`)p7O
package org.rut.util.algorithm.support; a~JZc<ze
H+gB|
import org.rut.util.algorithm.SortUtil; LtKR15h,
*&h]PhY
/** xH,e$t#@@~
* @author treeroot j!;E>`g
* @since 2006-2-2 8-kR {9r
* @version 1.0 m@L>6;*
*/ i/!KUbt
public class HeapSort implements SortUtil.Sort{ <1x u&Z7
#KHj.Vg
/* (non-Javadoc) _pvt,pW
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #\_FSr fX
*/ pRsIi_~&
public void sort(int[] data) { -sDl[
MaxHeap h=new MaxHeap(); LUpkO
h.init(data); od,,2pwK+
for(int i=0;i h.remove(); GGZ9DC\{
System.arraycopy(h.queue,1,data,0,data.length); qM3(OvCt
} @q@I(%_`
d5{RIM|
private static class MaxHeap{ wsAb8U C_
wLE|J9t%Ea
void init(int[] data){ dEX67rUj;
this.queue=new int[data.length+1]; m|]"e@SF2
for(int i=0;i queue[++size]=data; Zba<|C
fixUp(size); 20Jlf?
} q 4Ok$~"I
} jsKKg^g
c@j3L23B
private int size=0; PBL=P+
rV-Xsf7Z
private int[] queue; 4Y G\<Zf
IkGM~3e
public int get() { ,Vz-w;oDn
return queue[1]; R-4#y%k<
} Gsm.a
_tQM<~Y]u\
public void remove() { ys7Tq+
SortUtil.swap(queue,1,size--); 9%MgAik(
fixDown(1); O[|X=ZwR:l
} 9sv#TT5V
file://fixdown ^ZBTd5t#
private void fixDown(int k) { H>-{.E1bG
int j; D7jbo[GgS
while ((j = k << 1) <= size) { Y%zWaH
if (j < size %26amp;%26amp; queue[j] j++; ,kFp%qNj
if (queue[k]>queue[j]) file://不用交换 nLrCy5R:
break; N6*FlG-
SortUtil.swap(queue,j,k); S]&aDg1y}
k = j; tq*6]q8c>
} 7WNUHLEt
} _0iV6Bj
private void fixUp(int k) { =66'33l2
while (k > 1) { _X{ GZJm
int j = k >> 1; .[?2_e#9%
if (queue[j]>queue[k]) IfP?+yPa
break; _.m|Ml,`{
SortUtil.swap(queue,j,k); _+Pz~_+kS
k = j; {~'Iu8TvZ
} nHLMF7\
} @$~;vS
hSj@<#b>F
} }YU\}T-P
mWMtz]M}
} Dh68=F0
-AB0uMot
SortUtil： j:HIcCp
VLbbn
package org.rut.util.algorithm; `"#hhKG
rX?%{M,xFw
import org.rut.util.algorithm.support.BubbleSort; "=2'Oqp1
import org.rut.util.algorithm.support.HeapSort; :=:m4UJb
import org.rut.util.algorithm.support.ImprovedMergeSort; =8Z-ORW51
import org.rut.util.algorithm.support.ImprovedQuickSort; +u`4@~D#
import org.rut.util.algorithm.support.InsertSort; D]WrPWL8v
import org.rut.util.algorithm.support.MergeSort; 1q|iw
import org.rut.util.algorithm.support.QuickSort; @E"lN
import org.rut.util.algorithm.support.SelectionSort; dleCh+ny?
import org.rut.util.algorithm.support.ShellSort; ]i>,oxBWe
\9R=fA18
/** *y|zF6
* @author treeroot 4)p ID`
* @since 2006-2-2 ,}l|_GGj
* @version 1.0 xO4""/n
*/ KC8
public class SortUtil { ~1nKL0C6u
public final static int INSERT = 1; jcRe),
public final static int BUBBLE = 2; y-~_W 6\
public final static int SELECTION = 3; m\MI 6/
public final static int SHELL = 4; R%`fd *g
public final static int QUICK = 5; bR?xz-g%<3
public final static int IMPROVED_QUICK = 6; ONFx -U]
public final static int MERGE = 7; (g1Op~EM
public final static int IMPROVED_MERGE = 8; ^E".`~R
public final static int HEAP = 9; j_z@VT}y
z]2lT IWg
public static void sort(int[] data) { jI9#OEH_g
sort(data, IMPROVED_QUICK); b)r;a5"<5
} h\+8eeIl
private static String[] name={ U6YHq2<
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uXb}oUC
}; w zi7pJjXh
.ns1;8
private static Sort[] impl=new Sort[]{ h$FpH\-
new InsertSort(), 54w..8'
new BubbleSort(), DUxj^,mf,
new SelectionSort(), ]N^a/&}*
new ShellSort(), 9BPucXK
new QuickSort(), #AzZ4<;7
new ImprovedQuickSort(), wTGH5}QZ+
new MergeSort(), sV+/JDl
new ImprovedMergeSort(), !K#Q[Ee
new HeapSort() Q0I22?
}; d([NU;
;5A
public static String toString(int algorithm){ k"V| f&
return name[algorithm-1]; bBBW7',[a
} #]'#\d#i
"]81+ D
public static void sort(int[] data, int algorithm) { 3eqnc),Z
impl[algorithm-1].sort(data); c@%:aiEl
} X/fk&Cp
F`;oe[wfk
public static interface Sort { LoQm&3/
public void sort(int[] data); #N?EPV$
} xZ}1dq8
-aPvls
public static void swap(int[] data, int i, int j) { `g&<7~\=A
int temp = data; Tp&03
data = data[j]; C#`VVtei
data[j] = temp; Lf|5miO
} :yo tpa
} V^WR(Q}