[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; @(/$;I,
} NSRY(#3
int i1=l; pTQ7woj}
int i2=mid+1; _NuHz
for(int cur=l;cur<=r;cur++){ 2MXg)GBcU>
if(i1==mid+1) R,!aX"]|
data[cur]=temp[i2++]; _B4N2t$
else if(i2>r) L eUp!
data[cur]=temp[i1++]; q2Gm8>F1y.
else if(temp[i1] data[cur]=temp[i1++]; iF##3H$c
else =v!8i
data[cur]=temp[i2++]; '&AeOn
} V-%jSe<
} 4[r:DM|8
bA"*^"^
} 7'.6/U
#)DDQ?D
改进后的归并排序: i[vN3`*B
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package org.rut.util.algorithm.support; <ihJp^kgQ
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import org.rut.util.algorithm.SortUtil; p)7U%NMc(*
]nS9taEA
/** O St~P^1
* @author treeroot #R=6$
* @since 2006-2-2 g>?,,y6/w
* @version 1.0 &fxyY(
*/ sBN4:8
public class ImprovedMergeSort implements SortUtil.Sort { B`%%,SLJ
L@ N\8mf
private static final int THRESHOLD = 10; Qmv8T ^+
:$^sI"hO
/* >va9*pdJ
* (non-Javadoc) OYfP!,+bn
* ui*CA^ Y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :=`N2D
*/ =5p?4/4 J
public void sort(int[] data) { <~5$<L4
int[] temp=new int[data.length]; "Bn]-o|r
mergeSort(data,temp,0,data.length-1); vdulrnGqL
} [+dTd2uZ<\
~:4Mf/Ca
private void mergeSort(int[] data, int[] temp, int l, int r) { bu\D*-
int i, j, k; V+y:!t`
int mid = (l + r) / 2; }?d l.=eq
if (l == r) 1z8AK"8
return; 0j-;4>p
if ((mid - l) >= THRESHOLD) 4mWT"T-8
mergeSort(data, temp, l, mid); q'[yYPDX5x
else K@=_&A!
insertSort(data, l, mid - l + 1); -QydUr/(o
if ((r - mid) > THRESHOLD) 5~omZ,qe
mergeSort(data, temp, mid + 1, r); 75H5{#)
else 03y5$kQ
insertSort(data, mid + 1, r - mid); %lK]m`(
IPh_QE2g
for (i = l; i <= mid; i++) { (XA]k%45
temp = data; h,Tsb:Q"M
} @ GzN0yXhR
for (j = 1; j <= r - mid; j++) { /I' np
temp[r - j + 1] = data[j + mid]; *j|BSd P
} +(2mHS0_a
int a = temp[l]; z9*7fT
int b = temp[r]; OY#=s!] M
for (i = l, j = r, k = l; k <= r; k++) { S$fCO$bU
if (a < b) { ^sVB:?
data[k] = temp[i++]; F;dUqXUu
a = temp; L}U fd >*
} else { W-U[7n
data[k] = temp[j--]; H!{Cr#=
b = temp[j]; ,W<mz7Z(@
} A?OaP
} GfT`>M?QGK
} 6t6#<ts
9Lxa?Y1
/** 9k!#5_ M
* @param data (A8X|Y
* @param l `_&7-;)i*\
* @param i O!\\m0\e
*/ J\kv}v
private void insertSort(int[] data, int start, int len) { "(#]H;!W
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v.I>B3bEg
} oBTRO0.s+
} ul3._Q
} gnSb)!i>z
} {p(.ckze+
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堆排序： 'Sjcm@ILm
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package org.rut.util.algorithm.support; sHulaX{
b]U%|bp
import org.rut.util.algorithm.SortUtil; 9ozUg,+Z|J
p2~MJ LK4
/** +3n07d
* @author treeroot "8Y4;lbN.q
* @since 2006-2-2 lGZ^ 8
* @version 1.0 kC)ye"r
*/ VDq?,4Kb
public class HeapSort implements SortUtil.Sort{ 7*r7Q'
%t^-Guz
/* (non-Javadoc) $u./%JS
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ]\<^rEU
*/ ?-0>Wbg
public void sort(int[] data) { "+V.Yue`R
MaxHeap h=new MaxHeap(); f=Rx8I
h.init(data); jDO[u!J6.%
for(int i=0;i h.remove(); H-o>|C
System.arraycopy(h.queue,1,data,0,data.length); bR!*z
} BHw/~Hd4
@bj3N
private static class MaxHeap{ AA$-Lx(UJk
dRXF5Ox5K}
void init(int[] data){ 1x#Z}XG
this.queue=new int[data.length+1]; hqVFb.6[
for(int i=0;i queue[++size]=data; H`;q@
fixUp(size); Fh4kd>1D
} a$SGFA}V
} Yvu!Q
\j]i"LpWb
private int size=0; }?=$?3W
.* xaI+:
private int[] queue; wh@;$s"B
Ul@yXtj
public int get() { +AyrKs?h
return queue[1]; 257pO9]
} fE;<)tU
wBUn*L
public void remove() { r-s.i+\
SortUtil.swap(queue,1,size--); @exeHcW61
fixDown(1); gZe(aGh
} 9a5x~Z:'
file://fixdown tTB,eR$
private void fixDown(int k) { Eh)PZvH
int j; |Psi?'4
while ((j = k << 1) <= size) { h7|#7 d
if (j < size %26amp;%26amp; queue[j] j++; {re<S<j&
if (queue[k]>queue[j]) file://不用交换 lV-b
break; `r:n[N=Y&
SortUtil.swap(queue,j,k); {f\/2k3
k = j; kqfO3{-;{:
} ) )q4Rh
} 8(euWS
private void fixUp(int k) { c|%.B2
while (k > 1) { s=&&gC1
int j = k >> 1; Pvq74?an`
if (queue[j]>queue[k]) 5 #)5Z8`X
break; B'OUT2cgB
SortUtil.swap(queue,j,k); ruG5~dm>
k = j; ]E\o<"#t/
} ao]Dm#HiO
} ua%$r[
LwV4p6A
} r(W=1e'
J2M[aibV
} VFj}{Y
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SortUtil： o.ntzN
P".CZyI-i
package org.rut.util.algorithm; /G`'9cD
3,2|8Q,((!
import org.rut.util.algorithm.support.BubbleSort; E({W`b~_f
import org.rut.util.algorithm.support.HeapSort; < `r+ZyM
import org.rut.util.algorithm.support.ImprovedMergeSort; Lj"@JF;c
import org.rut.util.algorithm.support.ImprovedQuickSort; t%$>
import org.rut.util.algorithm.support.InsertSort; X\:;A{
import org.rut.util.algorithm.support.MergeSort; r5kKNyJ
import org.rut.util.algorithm.support.QuickSort; x w8 e
import org.rut.util.algorithm.support.SelectionSort; )aov]Ns
import org.rut.util.algorithm.support.ShellSort; FA}dKE=c Q
;by`[)
/** V7Z+@e-5
* @author treeroot Em?Z
* @since 2006-2-2 ' XJ>;",[
* @version 1.0 SW!lSIk
*/ ToWiXH)4
public class SortUtil { @kCFc}
public final static int INSERT = 1; 5hN`}Ve
public final static int BUBBLE = 2; RjC3wO::
public final static int SELECTION = 3; 'O%itCy)
public final static int SHELL = 4; 1 PL2[_2:
public final static int QUICK = 5; w\o?p.drp=
public final static int IMPROVED_QUICK = 6; )YE3n-~7{
public final static int MERGE = 7; P;7JK=~k
public final static int IMPROVED_MERGE = 8; q#RUL!WF7U
public final static int HEAP = 9; uURm6mVt9:
c]SXcA;Pmv
public static void sort(int[] data) { z>rl7&[@
sort(data, IMPROVED_QUICK); v]UT1d=_T
} |sP;`h}I%
private static String[] name={ \$.8iTr@
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" 7>#?-, B
}; ZG29q>
wldv^n hM
private static Sort[] impl=new Sort[]{ >yr:L{{D}G
new InsertSort(), } + ]A?'&
new BubbleSort(), HjCWsQM
new SelectionSort(), km@V|"ac _
new ShellSort(), vS#Y,H:yAj
new QuickSort(), S{HAFrkm7
new ImprovedQuickSort(), vGe];
new MergeSort(), 0_F6t-
new ImprovedMergeSort(), b.mcP@
new HeapSort() 87; E#2
}; T?vM\o%i3
UoAHy%Y<%
public static String toString(int algorithm){ _ebo
return name[algorithm-1]; 0,b.;r
} vO>Fj
,sw|OYb
public static void sort(int[] data, int algorithm) { ?A4zIJ\
impl[algorithm-1].sort(data); 0&M~lJ
} uDhe )
ENZjRf4
public static interface Sort { -|K^!G
public void sort(int[] data); Iw)}YZmn
} =geopktpf
H(L.k;B
public static void swap(int[] data, int i, int j) { ?4k/V6n@y
int temp = data; t zn1|
data = data[j]; ]ySm|&aU
data[j] = temp; > 2)@(f~g
} 9:DT+^BB
} 3K;V3pJ].