[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; aGAeRF
} ["_+~*
int i1=l; "h5.^5E6
int i2=mid+1; /jl/SV+
for(int cur=l;cur<=r;cur++){ ~@\sN+VS
if(i1==mid+1) |SfCuV#g/<
data[cur]=temp[i2++]; 60R]Q
else if(i2>r) /UqIkc
data[cur]=temp[i1++]; %Ze]6TP/><
else if(temp[i1] data[cur]=temp[i1++]; *!.anbo@?z
else gX|We}H
data[cur]=temp[i2++]; NmA6L+
} |{ @BH
} ffQm"s:P
:+_
} #9glGPR(
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改进后的归并排序: ._q}lWT
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package org.rut.util.algorithm.support; onU\[VvM
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import org.rut.util.algorithm.SortUtil; `]=0oDG:1!
1)#dgsa
/** QuIZpP=
* @author treeroot hb<cynY
* @since 2006-2-2 OWc~=Cr
* @version 1.0 I}+9@d
*/ O+?vQ$z
public class ImprovedMergeSort implements SortUtil.Sort { 3wMnTT"At
Mi}.
private static final int THRESHOLD = 10; /5Sd?pW;
[(2XL"4D
/* $H`{wJ?2(
* (non-Javadoc) v~A*?WU;n
* sDB,+1"Y$
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) UP7?9\
*/ |=:<[FU
public void sort(int[] data) { 9&bJ]
int[] temp=new int[data.length]; C~IE_E&Q`
mergeSort(data,temp,0,data.length-1); f@ILC=c<
} ,u=+%6b)A
UyAy?i8K
private void mergeSort(int[] data, int[] temp, int l, int r) { }tO>&$ Z6f
int i, j, k; ffMk.SqI
int mid = (l + r) / 2; F/cA tT.M?
if (l == r) Ro_jfM
return; Z7NR%u_|[
if ((mid - l) >= THRESHOLD) -zzoz x]S=
mergeSort(data, temp, l, mid); [a_o3
else eQwvp`@"
insertSort(data, l, mid - l + 1); }]Nt:_UCX
if ((r - mid) > THRESHOLD) 3RF`F i
mergeSort(data, temp, mid + 1, r); V KxuK0{
else 2wJa:=$
insertSort(data, mid + 1, r - mid); 7GvMKtuSK
CFUn1^?0
for (i = l; i <= mid; i++) { [1mEdtqf*
temp = data; V`8\)FFG
} c#f@v45
for (j = 1; j <= r - mid; j++) { "yc|ng
temp[r - j + 1] = data[j + mid]; I+,CiJ|4
} c^<~Y$i
int a = temp[l]; a2[rY
int b = temp[r]; >Q=Q%~
for (i = l, j = r, k = l; k <= r; k++) { P;eXUF+jn
if (a < b) { #-o 'g!
data[k] = temp[i++]; T!I3.
a = temp; +KaVvf
} else { pqTaN=R8
data[k] = temp[j--]; R9Y@I
b = temp[j]; ];'7~",Y
} z8XWp[K
} /I((A/ks
} yp[,WZt
9o4h~Imu
/** "}Ikx tee
* @param data %OsxXO?
* @param l BT`g'#O
* @param i os7xwI;T
*/ cTq;<9Iew
private void insertSort(int[] data, int start, int len) { 3~{0X-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ~uV(/?o%
} 1IlOU|4
} PuhvJHT
} Z6-ZAS(>m
} M!D6i5k,
=ym<yI<
堆排序： vOLa.%X]h
5,4m_fBoW
package org.rut.util.algorithm.support; {9@u:(<X9
<xe_t=N
import org.rut.util.algorithm.SortUtil; Cg|\UKfy$
LIrebz
/** 06M?ecN
* @author treeroot JL>frS3M
* @since 2006-2-2 ddN G:
* @version 1.0 :>/6:c?atG
*/ CYlS8j
public class HeapSort implements SortUtil.Sort{ LJom+PxF$x
*<[zG7+&[
/* (non-Javadoc) )TEm1\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /::Y &&$f
*/ m\XG7uo~
public void sort(int[] data) { hzU(XW
MaxHeap h=new MaxHeap(); ExMd$`gW
h.init(data); B*Ey&DAV
for(int i=0;i h.remove(); 1{wbC)
System.arraycopy(h.queue,1,data,0,data.length); ef)zf+o
} LlS~J K
\ @[Q3.VX
private static class MaxHeap{ |fW_9={1kQ
kv6nVlI)B
void init(int[] data){ .wmqaLd%
this.queue=new int[data.length+1]; &YcOmI/MM
for(int i=0;i queue[++size]=data; N:okt)q:%
fixUp(size); cRuN;
} B,&QI&k`~
} y=.bn!u}z
J .VZD
private int size=0; A2;6Vz=z
jEwt1S V
private int[] queue; ,<'>jaC
oam;hmw
public int get() { o(H.1ESk
return queue[1]; 9e c},~(
} =R~zD4{"
2gZ nrU
public void remove() { Mi{ns $B%
SortUtil.swap(queue,1,size--); #0hqfs
fixDown(1); 5@-H8*
} .ANR|G
file://fixdown hSR+7qN<e
private void fixDown(int k) { c/ih%xR
int j; h5pfmN\-5
while ((j = k << 1) <= size) { rmo\UCD
if (j < size %26amp;%26amp; queue[j] j++; dGi HO
if (queue[k]>queue[j]) file://不用交换 5&h">_j
break; N>,`TsUwW
SortUtil.swap(queue,j,k); ZHa>8x;Mjl
k = j; Yb4ku7}
} 1_#;+S
} RGs7Hc
private void fixUp(int k) { ? dHl'
while (k > 1) { wwywiFj
int j = k >> 1; q*|Alrm
if (queue[j]>queue[k]) EFljUT?&
break; K5|~iW'
SortUtil.swap(queue,j,k); gua7<z6=eh
k = j; (ie%zrhS
} -*MY7t3
} gBi3^GxjM?
mJ=V<_
} \wk;Bo
=JgR c7
} R ZQH#+*t}
80_w_i+
SortUtil： *4Ldh}S!
16Jq*hKU
package org.rut.util.algorithm; 5lJL[{
~59lkr8
import org.rut.util.algorithm.support.BubbleSort; 4xr^4\lk
import org.rut.util.algorithm.support.HeapSort; Su"Z3gm5Kw
import org.rut.util.algorithm.support.ImprovedMergeSort; 9Dgs A`{$
import org.rut.util.algorithm.support.ImprovedQuickSort; "C\yM{JZ
import org.rut.util.algorithm.support.InsertSort; FRZ]E)9Z]b
import org.rut.util.algorithm.support.MergeSort; {_\cd.AuT
import org.rut.util.algorithm.support.QuickSort; ruvfp_:
import org.rut.util.algorithm.support.SelectionSort; \20}/&
import org.rut.util.algorithm.support.ShellSort; 0VSIyG_Z
"n`z`{<n
/** <<CWN(hQWO
* @author treeroot j&_>_*.y
* @since 2006-2-2 }`Ya;
* @version 1.0 rU&Y/
*/ =CRptk6tS
public class SortUtil { b<~-s sL7a
public final static int INSERT = 1; bTmhz
public final static int BUBBLE = 2; nEd "~
public final static int SELECTION = 3; R"V90bCf
public final static int SHELL = 4; *bf 5A9
public final static int QUICK = 5; <{Y3}Q
public final static int IMPROVED_QUICK = 6; NRJp8G Z%U
public final static int MERGE = 7; |xcC'1WU
public final static int IMPROVED_MERGE = 8; sdg2^]|
public final static int HEAP = 9; QfAmGDaYQ
_^#eO`4"
public static void sort(int[] data) { 05T?c{ ;
sort(data, IMPROVED_QUICK); i79$D:PcLa
} )Yy5u'}
private static String[] name={ 1xd6p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" T+@i;M
}; Yq6 @R|u
CYgokS\=,
private static Sort[] impl=new Sort[]{ ZxSFElDD]E
new InsertSort(), <tFq^qB
new BubbleSort(), (,#m+
new SelectionSort(), [)s4:V
new ShellSort(), ~Yi4?B<
new QuickSort(), g^(gT
new ImprovedQuickSort(), c{I]!y^!
new MergeSort(), Cm)TFh6
new ImprovedMergeSort(), n19A>,m
new HeapSort() _7Y-gy#\a
}; (b//YyqN
>pLJ ,Z
public static String toString(int algorithm){ )MF@'zRK
return name[algorithm-1]; LdG?kbJ&y
} \WFcb\..
XZARy:+bc
public static void sort(int[] data, int algorithm) { bRy(`
impl[algorithm-1].sort(data); ;9mRumLG"
} UTKyPCfj
zHZfp_I
public static interface Sort { [znN'Fg:"
public void sort(int[] data); c,.@Cc2
} G6zFQ\&f
^C~Ryw7
public static void swap(int[] data, int i, int j) { U@y)x+:
int temp = data; +5*bU1}O
data = data[j]; fEXFnQ#
data[j] = temp; \ opM}qZ
} RVttk )Ny
} TG$#aX\'