[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; +1Ua`3dWN_
} -P'KpX:]hd
int i1=l; i#W0
int i2=mid+1; l&LrcM
for(int cur=l;cur<=r;cur++){ UpIt"+d2&
if(i1==mid+1) yCLDJ%8
data[cur]=temp[i2++]; $MB/j6#j
else if(i2>r) /agX! E4s
data[cur]=temp[i1++]; wc.T;(
else if(temp[i1] data[cur]=temp[i1++]; H|i39XV
else {X'D07q
data[cur]=temp[i2++]; 3ZEV*=+T5
} A,'JmF$d
} B>"O~ gZ{#
~99DE78
} :M'V**A(
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改进后的归并排序: Az"(I>VfD
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package org.rut.util.algorithm.support; Rx>>0%e.
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import org.rut.util.algorithm.SortUtil; 6~_TXy/
rfVHPMD0
/** P&0o~@`cL
* @author treeroot I"1H]@"=
* @since 2006-2-2 Y4.t:Uzr
* @version 1.0 zPKx: I3
*/ }g\1JSJ%H
public class ImprovedMergeSort implements SortUtil.Sort { drc]"6 k
mqFo`Ee
private static final int THRESHOLD = 10; c Oi:bC@
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/* ,J63?EQ3
* (non-Javadoc) vOl<
* 1ehl=WN
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) i^zncDMA
*/ ]&mN~$+C
public void sort(int[] data) { uO,9h0y0W
int[] temp=new int[data.length]; E,nxv+AQ
mergeSort(data,temp,0,data.length-1); q;<=MO/
} m5/d=k0l
eAPNF?0yh
private void mergeSort(int[] data, int[] temp, int l, int r) { CCQ38P@rv
int i, j, k; a\BV%'Zqg
int mid = (l + r) / 2; Sb;=YW 1<
if (l == r) 8r46Wr7Q
return; |)pRkn8x
if ((mid - l) >= THRESHOLD) @ppT;9<d
mergeSort(data, temp, l, mid); ^OWA
else '!wI8f
insertSort(data, l, mid - l + 1); tDk!]
if ((r - mid) > THRESHOLD) 2iJ)K rw
mergeSort(data, temp, mid + 1, r); `$5 QTte
else Arzyq_ Yk
insertSort(data, mid + 1, r - mid); ][IEzeI_LN
)* \N[zm
for (i = l; i <= mid; i++) { d}2$J1`
temp = data; wG\ +C'&~
} Wu!s
for (j = 1; j <= r - mid; j++) { !iO%?nW;
temp[r - j + 1] = data[j + mid]; 'zg; *)x1/
} wcI?.
int a = temp[l]; S);SfNh%CL
int b = temp[r]; )*wM DM5q
for (i = l, j = r, k = l; k <= r; k++) { qP}187Q1
if (a < b) { +%%Ef]
data[k] = temp[i++]; }+{? Ms
a = temp; } qf=5v
} else { f=L&>X
data[k] = temp[j--]; Q*J8`J:#^R
b = temp[j]; ~5Cid)Q}@o
} :p@.aD5
} &Oih#I
} VoTnm
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/** Hido[
* @param data 1YrIcovi-
* @param l v,VCbmc
* @param i $xK2M
*/ 'fGB#uBt
private void insertSort(int[] data, int start, int len) { $gv3Up"U
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 7`c\~_Df_
} y|7sh
} ~.*G%TW &V
} .a0]1IkatV
} $k,wA8OZ-
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堆排序： Q,f~7IVX
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package org.rut.util.algorithm.support; 0S%xm'|N
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import org.rut.util.algorithm.SortUtil; nN]GO}
1j!LK-
/** w I7iE4\vz
* @author treeroot l[AQyR1+/
* @since 2006-2-2 KS3>c7
* @version 1.0 \Xr Sn_p-
*/ I+4#LR3;
public class HeapSort implements SortUtil.Sort{ =G9 9U/
U_8 Z&
/* (non-Javadoc) fVXZfq6
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 6` 8H k;
*/ bl8EzO
public void sort(int[] data) { 0,z3A>C
MaxHeap h=new MaxHeap(); dx&!RK+
h.init(data); ye-EJDZN
for(int i=0;i h.remove(); (T9Q6\sa
System.arraycopy(h.queue,1,data,0,data.length); hT0[O
} <*/IV<
%wDE+&M
private static class MaxHeap{ >STAPrBp+
zarxv| }$
void init(int[] data){ BWWO=N
this.queue=new int[data.length+1]; P5K=S.g
for(int i=0;i queue[++size]=data; +}.~"
fixUp(size); vR)f'+_Nz
} s<XAH7?0
} J_|LGrt})
F+m%PVW:
private int size=0; 2YbI."ob
D"z3SLFW{
private int[] queue; O)jpnNz
A5\00O~
public int get() { X9-WU\?UC
return queue[1]; nqFJNK]a
} %tvP\(]h
cS2PrsUx
public void remove() { 4m:D8&D_M
SortUtil.swap(queue,1,size--); ^7Hwpn7E
fixDown(1); C$+z1z.!
} VL?sfG0
file://fixdown Mjon++>Z
private void fixDown(int k) { wwuM!Z+
int j; <3)k M&.B
while ((j = k << 1) <= size) { sP'U9l
if (j < size %26amp;%26amp; queue[j] j++; Sk6B>O<:
if (queue[k]>queue[j]) file://不用交换 fFNscY<4w
break; X3dXRDB'
SortUtil.swap(queue,j,k); 9zL(PkC%\
k = j; V'q?+p] a
} _u{z$;
} 3T= ?!|e
private void fixUp(int k) { ;(3!#4`q(]
while (k > 1) { )z^NJ'v4(
int j = k >> 1; lZr}F.7
if (queue[j]>queue[k]) w!eY)p<
break; hE;|VSdo
SortUtil.swap(queue,j,k); cp)BPg
k = j; */6lyODf
} TFAd
} +e87/\5
4aGVIQ
} $VxKv7:
GiK4LJ~cH)
} \V_Tc`
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SortUtil： W<@9ndvH
ib\_MNIb
package org.rut.util.algorithm; \:m1{+l
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import org.rut.util.algorithm.support.BubbleSort; _qO'(DKylC
import org.rut.util.algorithm.support.HeapSort; `6:B0-r
import org.rut.util.algorithm.support.ImprovedMergeSort; qI%X/'
import org.rut.util.algorithm.support.ImprovedQuickSort; Z_h-5VU-
import org.rut.util.algorithm.support.InsertSort; j2RdBoCt
import org.rut.util.algorithm.support.MergeSort; }ip3dm
import org.rut.util.algorithm.support.QuickSort; 0g`$Dap
import org.rut.util.algorithm.support.SelectionSort; p>l:^-N;f
import org.rut.util.algorithm.support.ShellSort; I'E7mb<2
{ew; /;
/** 4o<rj4G>
* @author treeroot N`HiNb [
* @since 2006-2-2 [0n[\& 0
* @version 1.0 jcbq#
*/ F;L8FL-
public class SortUtil { 5~[m]
public final static int INSERT = 1; Fy$f`w_H@
public final static int BUBBLE = 2; 2oo/KndU
public final static int SELECTION = 3; `tPVNO,l
public final static int SHELL = 4; 6Qk[TL)t
public final static int QUICK = 5; [Qqomm.[\w
public final static int IMPROVED_QUICK = 6; 6E-AfY'<
public final static int MERGE = 7; RuGG3"|
public final static int IMPROVED_MERGE = 8; fgoLN\
public final static int HEAP = 9; 6]sP"
WS ^,@>A
public static void sort(int[] data) { f.Y [2b
sort(data, IMPROVED_QUICK); TjE'X2/
} !$hi:3{U,
private static String[] name={ I<rT\':9
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )~0TGy|
}; 82M`sk3.
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private static Sort[] impl=new Sort[]{ VTa%
new InsertSort(), ^D76_'{
new BubbleSort(), GO)5R,
new SelectionSort(), tE#;$Ss
new ShellSort(), i IM\_<?
new QuickSort(), KL yI*`
new ImprovedQuickSort(), Fs3 :NH
new MergeSort(), w>o/)TTJL
new ImprovedMergeSort(), E)`:sSd9
new HeapSort() }P'c8$
}; ,`bmue5
klR\7+lK
public static String toString(int algorithm){ .1+I8qj
return name[algorithm-1]; v5\5:b{/
} V}Ee1C
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public static void sort(int[] data, int algorithm) { );zLgNx,
impl[algorithm-1].sort(data); !z1\#|>
} nb.|^O?
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public static interface Sort { unih"};ou
public void sort(int[] data); $^_6,uBM[
} .e5d#gE0
_=cU2
public static void swap(int[] data, int i, int j) { jV[;e15+
int temp = data; 8iTB
data = data[j]; xnfJruT
data[j] = temp; 4f&"1:
} ? G`6}NP
} )$h!lAo