[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; #V~me
} V2wb%;q
int i1=l; u7>],<
int i2=mid+1; u. F9g #
for(int cur=l;cur<=r;cur++){ )"7iJb<E
if(i1==mid+1) Pd_U7&w,5
data[cur]=temp[i2++]; kaVxT_
else if(i2>r) nksLWfpG?B
data[cur]=temp[i1++]; n{argI8wF
else if(temp[i1] data[cur]=temp[i1++]; Q+{xZ'o"Z
else ;DfY#-
data[cur]=temp[i2++]; 286jI7T
} 52Z2]T c,
} h-`?{k&e
"R;U/+
} 8V`WO6*
X^wt3<Kbf
改进后的归并排序: (R=:X+ k
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package org.rut.util.algorithm.support; p>v$FiV2N
s+$ Q}|?u
import org.rut.util.algorithm.SortUtil; iL-(O;n
<lPm1/8
/** SJn;{X>)q
* @author treeroot ctZ uA+
* @since 2006-2-2 wDal5GJp
* @version 1.0 2lH&
*/ 9<6;Hr,>G
public class ImprovedMergeSort implements SortUtil.Sort { _)3|f<E_t)
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private static final int THRESHOLD = 10; ;u_X)
M2,l7
/* O`IQ(,yef
* (non-Javadoc) uP)'FI
* /|6N*>l)y
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) p_gm3Q
*/ -:+|zF@f
public void sort(int[] data) { ~D j8z+^
int[] temp=new int[data.length]; x}Eg.S
mergeSort(data,temp,0,data.length-1); q_[o"wq/
} %D{6[8
i+ ?^8#
private void mergeSort(int[] data, int[] temp, int l, int r) { {H>gtpVy
int i, j, k; Uiw2oi&_
int mid = (l + r) / 2; EHJ.T~X
if (l == r) LYTdTP
return; w3ResQ
if ((mid - l) >= THRESHOLD) D0-3eV-
mergeSort(data, temp, l, mid); 2`K=Hby
else 5{X<y#vAC0
insertSort(data, l, mid - l + 1); N)X3XTY
if ((r - mid) > THRESHOLD) sUO`uqZV
mergeSort(data, temp, mid + 1, r); =4YhG;%
else rH Lm\3
insertSort(data, mid + 1, r - mid); 6Pl<'3&
q"lSZ; 'E
for (i = l; i <= mid; i++) { +5*95-;0
temp = data; Tx# Mn~xD
} kS);xA8s]
for (j = 1; j <= r - mid; j++) { 7&)bJ@1U
temp[r - j + 1] = data[j + mid]; s/#!VnU6
} m+[Ux{$
int a = temp[l]; jvL[ JI,b
int b = temp[r]; TF\C@4Z
for (i = l, j = r, k = l; k <= r; k++) { xJ]\+ 50
if (a < b) { %J?xRv!
data[k] = temp[i++]; JX;G<lev
a = temp; 7>%8eEc
} else { i-_mTY&M
data[k] = temp[j--]; *i%.;Z"
b = temp[j]; kbQ>a5`,x
} e X|m
} !*N@ZL&X
} F^;ez/Gl
^\=`edN0
/** \r+ a GB
* @param data "<1{9
* @param l Bj;'qB>3
* @param i +a+Om73B2
*/ *.t7G
private void insertSort(int[] data, int start, int len) { @qAS*3j
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ]2KihP8z x
} uy$e?{Jf
} +=</&Tm
} /nA{#HY
} h*](a_0
U'bEL^Jf
堆排序： lBhLf@
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package org.rut.util.algorithm.support; 04'~ta(t
O<"}|nbmQ[
import org.rut.util.algorithm.SortUtil; OQT;zqup
e~@[18
/** a /#PLP
* @author treeroot MHai%E
* @since 2006-2-2 x2z;6)
* @version 1.0 X4t s)>"d
*/ RIE5KCrGB
public class HeapSort implements SortUtil.Sort{ &)vC;$vD`
T ;vF(
/* (non-Javadoc) Nwt" \3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2eC(Ijq[a
*/ \XM^oE#G
public void sort(int[] data) { D]W$?(=4
MaxHeap h=new MaxHeap(); F;[T#N:~
h.init(data); w@c87;c
for(int i=0;i h.remove(); rEv*)W
System.arraycopy(h.queue,1,data,0,data.length); IWveW8qJ
} :.d:9Z|_
^;maotHn
private static class MaxHeap{ t|!j2<e
S:q3QgU=X
void init(int[] data){ .E&z$N
this.queue=new int[data.length+1]; Ru>uL@w
for(int i=0;i queue[++size]=data; HXYRH
fixUp(size); _uKZMl
} qY$qaM^=
} n?ctLbg
E55t*^`
private int size=0; D?,#aB"
xD /9F18
private int[] queue; .tmiQ.
"zY](P
public int get() { zBp{K@U[|M
return queue[1]; U{$1[,f
} XfE -fH1j
o|iYd n\
public void remove() { za9)Q=6FD
SortUtil.swap(queue,1,size--); |?,[@z _,
fixDown(1); X_G| hx
} :BukUket1e
file://fixdown JwRF(1_sM
private void fixDown(int k) { J~iBB~x.
int j; !k(_PM
while ((j = k << 1) <= size) { f0SAP0M3
if (j < size %26amp;%26amp; queue[j] j++; 0T5=W U
if (queue[k]>queue[j]) file://不用交换 deeU@x`f<
break; dg7=X{=9jv
SortUtil.swap(queue,j,k); V~yAE@9
k = j; %77p5ctW
} oi&Wo'DX
} (zYy}g#n
private void fixUp(int k) { vNOH&ja-s
while (k > 1) { q*AQq=
int j = k >> 1; Y'3}G<'%
if (queue[j]>queue[k]) 5ZPzPUa8~
break; ^t*x*m8
SortUtil.swap(queue,j,k); N_Af3R1_
k = j; rf9_eP
} *Sf-;U
} QIn/,Yd
V'2EPYB
} a>B[5I5
}5O>EXE0R
} ZDYJhJ.
0ZPV'`KGp
SortUtil： xaKst p
i~{ _eQV
package org.rut.util.algorithm; 3%<C<(
TE-;X,gDV_
import org.rut.util.algorithm.support.BubbleSort; [$(R#tZ+
import org.rut.util.algorithm.support.HeapSort; z&$/EP-
import org.rut.util.algorithm.support.ImprovedMergeSort; i!dv0|_
import org.rut.util.algorithm.support.ImprovedQuickSort; D~&Mwsi
import org.rut.util.algorithm.support.InsertSort; <B&R6<]T
import org.rut.util.algorithm.support.MergeSort; <<|H=![
import org.rut.util.algorithm.support.QuickSort; =OV2uq
import org.rut.util.algorithm.support.SelectionSort; %xyX8c{sP
import org.rut.util.algorithm.support.ShellSort; c;I, O
x@cN3O
/** .Nx W=79t
* @author treeroot _#qe#
* @since 2006-2-2 -lRhz!E]
* @version 1.0 (%Oe_*e}Y
*/ eE/%6g
public class SortUtil { WA.\*Nqze
public final static int INSERT = 1; XqR{.jF.
public final static int BUBBLE = 2; ~k4W<
public final static int SELECTION = 3; 5y_"
public final static int SHELL = 4; H=zN[MU
public final static int QUICK = 5; BSp$F WvT?
public final static int IMPROVED_QUICK = 6; Ha ZFxh-(
public final static int MERGE = 7; nY) .|\|i
public final static int IMPROVED_MERGE = 8; ZZ A.a
public final static int HEAP = 9; ]u&dJL
G79C {|c\
public static void sort(int[] data) { H$-$2?5
sort(data, IMPROVED_QUICK); C?QfF{!7
} <~%t$:
private static String[] name={ u2`xC4>c
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Xn7[n
}; l6B.6 '4)w
q?VVYZXP
private static Sort[] impl=new Sort[]{ JY4_v>Aob
new InsertSort(), PF ;YE6
new BubbleSort(), FH n,]Tfx
new SelectionSort(), V}`M<A6:
new ShellSort(), I>m;G `
new QuickSort(), qU6BA\ZL
new ImprovedQuickSort(), VA]ZR+m
new MergeSort(), F|]rA*2u
new ImprovedMergeSort(), `p"U
new HeapSort() ._BB+G
}; ucFw,sB1
r|8V @.@i
public static String toString(int algorithm){ M-91 JOt~
return name[algorithm-1]; ],V kp
} <<BQYU)Ig
,(hY%M&\
public static void sort(int[] data, int algorithm) { |7S:l9;
impl[algorithm-1].sort(data); #HcI4j:s!
} Y_shy6"KH
?xHtn2(q
public static interface Sort { wG6FS
public void sort(int[] data); {1HB!@%,(
} 9l=Fv6
#y`k$20"
public static void swap(int[] data, int i, int j) { I_L;T
int temp = data; G\IocZ3Gz
data = data[j]; r2)pAiTM*
data[j] = temp; <lX:eR1
} j<|6s,&
} a j_:|]j