[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; 1~LfR
} v*<rNZI
int i1=l; koD}o^U#
int i2=mid+1; u!F\`Gfm_
for(int cur=l;cur<=r;cur++){ r_ B.bK
if(i1==mid+1) 734n1-F?I%
data[cur]=temp[i2++]; ]?oJxW.
else if(i2>r) e-\/1N84
data[cur]=temp[i1++]; nXI8`7D
else if(temp[i1] data[cur]=temp[i1++]; AP1ZIc6
else Z'}%Mkm`i}
data[cur]=temp[i2++]; ozl!vf# kv
} ;vX1U8
} M}@>h
|k%1mE(+=s
} 5ddfdIp
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改进后的归并排序: imAOYEH7}
&}pF6eIar
package org.rut.util.algorithm.support; 0G33hIOS
Cx.##n0
import org.rut.util.algorithm.SortUtil; WXDo`_{R
`Lavjmfr2V
/** LEOa=(mN\
* @author treeroot l+hOD{F4pS
* @since 2006-2-2 pLV %g#h
* @version 1.0 |3Oyg?2
*/ t imY0fx#
public class ImprovedMergeSort implements SortUtil.Sort { yx:+Xy*N
;Bzx}7A
private static final int THRESHOLD = 10; 7n+,!oJ
_9p79S<+
/* d"Wuu1tEY
* (non-Javadoc) -p>1:M <
* Q6e7Z-8
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Cg`lQYU
*/ 1\Pjz Lj
public void sort(int[] data) { u^CL }t*
int[] temp=new int[data.length]; i1m>|[@k
mergeSort(data,temp,0,data.length-1); F[!%,-*
} tm2lxt
gFu,q`Vf*
private void mergeSort(int[] data, int[] temp, int l, int r) { $N;J)
int i, j, k; d%epM5
int mid = (l + r) / 2; YPNW%N!$|
if (l == r) -/0\_zq7
return; e5n]@mu%
if ((mid - l) >= THRESHOLD) <mVFC
mergeSort(data, temp, l, mid); 3 v.8
else V3r)u\ o'
insertSort(data, l, mid - l + 1); 84WcaH
if ((r - mid) > THRESHOLD) 6-)WXJ@V
mergeSort(data, temp, mid + 1, r); TJZ~Rpq
else ]*lZFP~
insertSort(data, mid + 1, r - mid); Fu5Y<*x
T]zD+/=
for (i = l; i <= mid; i++) { mU?~s7
temp = data; uozq^sy
} 7DoU7I\u
for (j = 1; j <= r - mid; j++) { |0}7/^
temp[r - j + 1] = data[j + mid]; WVOj;c
} %iEdUV\$
int a = temp[l]; NqNU:_}
int b = temp[r]; ~1twGG_;
for (i = l, j = r, k = l; k <= r; k++) { }HmkTk
if (a < b) { k`|E&+og
data[k] = temp[i++]; '<uM\v^k
a = temp; o|c6=77043
} else { vf+z0df
data[k] = temp[j--]; Hs:zfvD
b = temp[j]; jX(${j<
} A|:+c*7]
} vq+CW?*"
} o9]32l
rBi<Yy$z
/** r `n|fD.
* @param data {#4a}:3
* @param l 0R[fH
* @param i XBkaum4j
*/ [6JDS;MIN
private void insertSort(int[] data, int start, int len) { 7 @}`1>97
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); q9j~|GE|
} eB1NM<V
} D M+MBK
} I9>vm]
} &0%Zb~ts
5p S$rf
堆排序： J@E]Fl
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package org.rut.util.algorithm.support; fHEIys,{
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import org.rut.util.algorithm.SortUtil; "c]9Q%
t&=bW<6
/** rr1'| k"
* @author treeroot .KC V|x;QW
* @since 2006-2-2 ^L)3O|6c
* @version 1.0 .!Z5A9^
*/ FA)ot)]
public class HeapSort implements SortUtil.Sort{ a3\~AO H%
,IqE<i!U
/* (non-Javadoc) !&g_hmnIF
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) &oB*gGRw=7
*/ xR&:]M[Vg
public void sort(int[] data) { 26nwUNak
MaxHeap h=new MaxHeap(); N0kCdJv
h.init(data); vo\'ycPv
for(int i=0;i h.remove(); 9< 07# 8c.
System.arraycopy(h.queue,1,data,0,data.length); e@0|fB%2
} knG:6tQ
O TlqJ
private static class MaxHeap{ F1-"yX1B
7z1@XO<D
void init(int[] data){ LmqSxHs0Q
this.queue=new int[data.length+1]; 'h'pM#D
for(int i=0;i queue[++size]=data; hp(MKfhH
fixUp(size); Y<VX.S2kf
} eaDZ^Z Er
} D})/2O p
#-G@p
private int size=0; Ot`%5<E^
fx(8 o+
private int[] queue; #<9'{i3
uj.$GAtO)
public int get() { $p0D9mF
return queue[1]; r/a@ x9
} gL&w:_
{ >[ ]iX
public void remove() { V61oK
SortUtil.swap(queue,1,size--); .[]S!@+%
fixDown(1); P[q>;Fx*
} %#v$d
file://fixdown JvW7h(u7g
private void fixDown(int k) { ~(XaXu
int j; \EoE/2"<
while ((j = k << 1) <= size) { V'W*'wo
if (j < size %26amp;%26amp; queue[j] j++; ro<w8V9.a
if (queue[k]>queue[j]) file://不用交换 p.g>+7
break; IO"P /Q
SortUtil.swap(queue,j,k); ciml:"nQ
k = j; wdBBx\FP
} 2ns,q0I A
} <@ ts[p.
private void fixUp(int k) { l:eC+[_;>
while (k > 1) { ~zac.:a8
int j = k >> 1; i*mU<:t
if (queue[j]>queue[k]) _[-MyUs
break; =lk'[P/p`
SortUtil.swap(queue,j,k); $A{$$8P
k = j; >"<s7$g
} w/(T
} UV}:3c6ZX
:M{ )&{D
} HP[B%
4vG-d)"M2
} O4oN)
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SortUtil： VpHwc!APq
DGCvH)Q
package org.rut.util.algorithm; b' M"To@
lrKT?siB
import org.rut.util.algorithm.support.BubbleSort; ;0oL*d[1Z
import org.rut.util.algorithm.support.HeapSort; |&WYu,QQ4
import org.rut.util.algorithm.support.ImprovedMergeSort; O]hUOc`k
import org.rut.util.algorithm.support.ImprovedQuickSort; H#hpaP;
import org.rut.util.algorithm.support.InsertSort; Hkia&nz'3
import org.rut.util.algorithm.support.MergeSort; UF5_be,D
import org.rut.util.algorithm.support.QuickSort; 5p!{#r6m
import org.rut.util.algorithm.support.SelectionSort; NwYQ6VEA
import org.rut.util.algorithm.support.ShellSort; DeF`#a0E
Mpw]dYM
/** WK*tXc_[b
* @author treeroot Y1sK sdV
* @since 2006-2-2 ,#,K_oz
* @version 1.0 ?87\_wL/j
*/ Vfy@?x= &
public class SortUtil { p7`9 d1n
public final static int INSERT = 1; _/>I-\xWA
public final static int BUBBLE = 2; &0Y |pY
public final static int SELECTION = 3; a-,*iK{_u
public final static int SHELL = 4; -YQS\@?
public final static int QUICK = 5; !=.y[Db=
public final static int IMPROVED_QUICK = 6; eza"<uBr
public final static int MERGE = 7; CStNCBZ|\
public final static int IMPROVED_MERGE = 8; vmkiw1
public final static int HEAP = 9; 1=IOio4U
HiK+}?I
public static void sort(int[] data) { 2oahQ: }B
sort(data, IMPROVED_QUICK); Gd\/n*j
} db1ZNw
private static String[] name={ m ne)c[Qn
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ivl %%nY'
}; $04lL/;
A#I&&qZ
private static Sort[] impl=new Sort[]{ ^C^I
new InsertSort(), |/l] ]+
new BubbleSort(), By7lSbj
new SelectionSort(), p.(+L^-=
new ShellSort(), (oy@j{G)c6
new QuickSort(), ojBdUG\
new ImprovedQuickSort(), i.On{nB"k
new MergeSort(), 2&:z[d}~H
new ImprovedMergeSort(), )3e_Hs+
new HeapSort() oupWzjo
}; ;rL1[qwk
ceks~[rP
public static String toString(int algorithm){ `g1?Q4h
return name[algorithm-1]; xV14Y9
} jMI30
{RI^zNgs[
public static void sort(int[] data, int algorithm) { -;"A\2_y
impl[algorithm-1].sort(data); N@<-R<s^
} ;2g.X(Ra
Il@K8?H@
public static interface Sort { >ZPu$=[W
public void sort(int[] data); [Nm?qY
} 4x+[?fw
Q/Z>w+zh#
public static void swap(int[] data, int i, int j) { Zi}h\R a
int temp = data; AtHkz|sl
data = data[j]; R|qNyNXo[
data[j] = temp; TeZu*c
} h2mHbe43
} \oxf_4X