[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; 6o]>lQ}
} \`8?=_ST
int i1=l; 5hp)Z7
int i2=mid+1; JiRfLB
for(int cur=l;cur<=r;cur++){ 1yjP`N
if(i1==mid+1) QVWUm!
data[cur]=temp[i2++]; +aRHMH
else if(i2>r) 0Yfz?:e
data[cur]=temp[i1++]; jYsg'Rl
else if(temp[i1] data[cur]=temp[i1++]; I =nvL
else nLnzl
data[cur]=temp[i2++]; '#CYw=S+
} PfJfa/#pA
} &p.7SPQ8/
L7s _3\
} p.!p6ve){
ivPX_#QI
改进后的归并排序: {e83 A/{
4m6%HV8{}[
package org.rut.util.algorithm.support; xd]7?L@h.I
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import org.rut.util.algorithm.SortUtil; ybpU?n
q ?m<9`
/** GD#W=O
* @author treeroot #v:A-u
* @since 2006-2-2 N~9zQ
* @version 1.0 %QX"oRMn0
*/ ?^{Ey[)'(
public class ImprovedMergeSort implements SortUtil.Sort { _kQOax{c/
>`+lEob
private static final int THRESHOLD = 10; ou[Wz{
NucLf6
/* . "`f~s\G
* (non-Javadoc) 3y-P-NI~=
* }62Q{>`
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z4tc3e
*/ TV(%e4U=
public void sort(int[] data) { <"!'>ZUt
int[] temp=new int[data.length]; ~}s0~j~
mergeSort(data,temp,0,data.length-1); B{lL}"++0
} (t"rzH
Ms=11C
private void mergeSort(int[] data, int[] temp, int l, int r) { -A1:S'aN-
int i, j, k; o.>Yj)U
int mid = (l + r) / 2; lsB.>NlU
if (l == r) SW=%>XKkh
return; W29GM -,K
if ((mid - l) >= THRESHOLD) @D@'S:3
mergeSort(data, temp, l, mid); 2w/qH4
else c/`Rv{*'o
insertSort(data, l, mid - l + 1); mv1|oFVW
if ((r - mid) > THRESHOLD) Cj#?Z7}z
mergeSort(data, temp, mid + 1, r); *jo1?
else anFl:=
insertSort(data, mid + 1, r - mid); :*)b<:4
k1;Jkq~
for (i = l; i <= mid; i++) { [N1[khY`
temp = data; UQCond+K
} n|!O .+\b
for (j = 1; j <= r - mid; j++) { No(S#,vJ;
temp[r - j + 1] = data[j + mid]; 5 OF*PBZ
} >2;KPV0H
int a = temp[l]; G>W:3y
int b = temp[r]; Q?-uJ1J
for (i = l, j = r, k = l; k <= r; k++) { P%Wl`NA P
if (a < b) { t}Kzh`
data[k] = temp[i++]; h]?[}&
a = temp; ((tWgSZ3
} else { X$ 76#x
data[k] = temp[j--]; L&qY709
b = temp[j]; T2i\S9X
} [`=:uUf3
} $q$\
} ;%xG bg!lg
e}q!m(K]e-
/** f'B#h;`
* @param data K yp(dp>
* @param l {;?bC'
* @param i v{TISgZ
*/ o@:u:n+.
private void insertSort(int[] data, int start, int len) { _tVrLb7`s
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]=m0@JTbG
} +ZeK,Y+Xy
} 5c3&4,,eR
} "aeKrMgc6V
} mS >I#?
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堆排序： <N\#6m
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package org.rut.util.algorithm.support; EO\@#",a
Fs1ms)
import org.rut.util.algorithm.SortUtil; QNCG^ub
_CXXgF[OCA
/** btIh%OM
* @author treeroot C'CdVDmX
* @since 2006-2-2 R86:1
* @version 1.0 [LHfH3[gU
*/ ?[S{kMb2
public class HeapSort implements SortUtil.Sort{ DwH=ln=
B<?fD
/* (non-Javadoc) >?0f>I%\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) D_Cd^;b
*/ 6Pu5 k;H
public void sort(int[] data) { nv"D
MaxHeap h=new MaxHeap(); ?c#v'c^=h
h.init(data); 4p_@f^v~QH
for(int i=0;i h.remove(); b:(*C
System.arraycopy(h.queue,1,data,0,data.length); >rzpYc'~w
} S]&7
;gv9J[R
private static class MaxHeap{ AJ-~F>gn
<D{_q.`vA
void init(int[] data){ +G>;NiP_
this.queue=new int[data.length+1]; Gzu $
for(int i=0;i queue[++size]=data; KoO\<_@";
fixUp(size); 3?oj46gP
} XW9 [VUW~
} y5bELWA
jYJfo<
private int size=0; U2VnACCUZs
^LJ?GJ$g
private int[] queue; J0"<}"
?$FvE4!n
public int get() { B|n<{g[-cM
return queue[1]; /-jk_8@a
} @^93q
@Xe[5T
public void remove() { R^F\2yth-
SortUtil.swap(queue,1,size--); B~2\v%J
fixDown(1); _Vxk4KjP5
} ij~023$DTt
file://fixdown 6sp?'GO`~
private void fixDown(int k) { _"#ucM=B:-
int j; UHW;e}O5
while ((j = k << 1) <= size) { eA(c{
if (j < size %26amp;%26amp; queue[j] j++; J#'+&DH
if (queue[k]>queue[j]) file://不用交换 b?FTwjV+#
break; '^Ce9r}
SortUtil.swap(queue,j,k); $N1UEvC%Q
k = j; f; 1C)
} kKg%[zXS
} g>*t"Rf:
private void fixUp(int k) { e'Th[ wJ
while (k > 1) { O%(k$fvM
int j = k >> 1; m]NyEMYg
if (queue[j]>queue[k]) l+1GA0'JP
break; |J#mgA}(
SortUtil.swap(queue,j,k); d^.fB+)A3
k = j; y-c2tF@'v
} &D 4Ci_6k
} _GK3]F0
kGSB6
} H:HJHd"W
L'Fy\K\
} A_WtmG_9
*FT )`
SortUtil： bqDHLoB\1
Hc{0O7
package org.rut.util.algorithm; qSWnv`hL
pZ4]oK\*
import org.rut.util.algorithm.support.BubbleSort; X%b.]A
import org.rut.util.algorithm.support.HeapSort; va/$dD9
import org.rut.util.algorithm.support.ImprovedMergeSort; R_2JP C
import org.rut.util.algorithm.support.ImprovedQuickSort; uR7\uvibUO
import org.rut.util.algorithm.support.InsertSort; :9`T.V<?
import org.rut.util.algorithm.support.MergeSort; *!*J5/b
import org.rut.util.algorithm.support.QuickSort; cSSrMYX2
import org.rut.util.algorithm.support.SelectionSort; Z{ A)
import org.rut.util.algorithm.support.ShellSort; *OQr:e<}
C,xM)V^a
/** 0UB,EI8
* @author treeroot P]G`Y>#$r
* @since 2006-2-2 -a[]#v9
* @version 1.0 v*7lJNN.
*/ ?Q)z5i'g#
public class SortUtil { eY1$smh t
public final static int INSERT = 1; HwH Wi
public final static int BUBBLE = 2; n8eR?'4
public final static int SELECTION = 3; ?X.MKNbp
public final static int SHELL = 4; bvMa|;f1
public final static int QUICK = 5; 3:h9cO/9
public final static int IMPROVED_QUICK = 6; -B-nTS`
public final static int MERGE = 7; cR1dGNcp/@
public final static int IMPROVED_MERGE = 8; yw%5W=<
public final static int HEAP = 9; JL4\%
Ppzd.=E
public static void sort(int[] data) { +89s+4Jn
sort(data, IMPROVED_QUICK); Uaho.(_GP
} ='0f#>0Q
private static String[] name={ #D$vH
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" *|RQ )
}; I%NPc4p
|6pNe T[
private static Sort[] impl=new Sort[]{ ec4jiE
new InsertSort(), 7lvUIc?krW
new BubbleSort(), l ^*GqP5
new SelectionSort(), /IS j0"/$
new ShellSort(), ?N,'1I
new QuickSort(), 38%xB<Y
new ImprovedQuickSort(), E Cx_ [|3{
new MergeSort(), <ealt
new ImprovedMergeSort(), K`nI$l7hg
new HeapSort() <}3c%Q1
}; %7PprN0>
6.Nu[-?
public static String toString(int algorithm){ >a;^=5E
return name[algorithm-1]; h7-!q@
} .oq!Ys4KA
bqXCe\#
public static void sort(int[] data, int algorithm) { AFWcTz6#d
impl[algorithm-1].sort(data); lGI5
} Q)c$^YsI
e'oM%G[
public static interface Sort { :4"SJ
public void sort(int[] data); +b.qzgH>r
} VJX{2$L
}*~EA=YN;
public static void swap(int[] data, int i, int j) { 7 N?x29
int temp = data; `MgR/@%hr
data = data[j]; `CI9~h@k
data[j] = temp; nBd!296
} u, %mVd
} dUtxG ~9