[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; ]%wVHC
} N`L0Vd
int i1=l; =WyZX 7@R
int i2=mid+1; LE9(fe) fe
for(int cur=l;cur<=r;cur++){ ebUBrxZX
if(i1==mid+1) 1p/3!1
data[cur]=temp[i2++]; V@cM|(
else if(i2>r) #t:S.A@
data[cur]=temp[i1++]; XBb~\p3y
else if(temp[i1] data[cur]=temp[i1++]; KLitg6&P
else 8&?s#5zA
data[cur]=temp[i2++]; i]6`LqlO
} ->g*</
} '%dfzK*Z
x,|hU@h
} V C24sU
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改进后的归并排序: h?BFvbAt
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package org.rut.util.algorithm.support; i+S) K
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import org.rut.util.algorithm.SortUtil; <UV1!2nv*
E[@ u 3i8
/** $RIecv<e_
* @author treeroot t\{'F7
* @since 2006-2-2 `_`QxM
* @version 1.0 `.FF!P:{C*
*/ M^r1S
public class ImprovedMergeSort implements SortUtil.Sort { [<g?WPCcC
u'|4?"uz
private static final int THRESHOLD = 10; ||hb~%JK6
El[)?+;D
/* TarIPp
* (non-Javadoc) zQ@I}K t
* Sa?ksD2IaB
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) X(]WVCu
*/ Mc09ES
public void sort(int[] data) { j53*E )d
int[] temp=new int[data.length]; 4cabP}gBk
mergeSort(data,temp,0,data.length-1); wVicyiY]
} ]b7zJUz
ur$ _
private void mergeSort(int[] data, int[] temp, int l, int r) { G-xDN59K
int i, j, k; 5NS[dQG5
int mid = (l + r) / 2; +cgSC5nR
if (l == r) =BSzsH7
return; "a ueL/dgN
if ((mid - l) >= THRESHOLD) F)&@P-9+
mergeSort(data, temp, l, mid); aY'C%^h]
else ]iN'x?Fo
insertSort(data, l, mid - l + 1); :PIF07$xl
if ((r - mid) > THRESHOLD) rz wF~-m +
mergeSort(data, temp, mid + 1, r); Oiz ,w7LRh
else hxVKV?Fl
insertSort(data, mid + 1, r - mid); s%C)t6`9
B_nVP
for (i = l; i <= mid; i++) { JJ}0gZ
temp = data; 8/i!' 0r\
} M=FxB;v
for (j = 1; j <= r - mid; j++) { z3&]%Q&
temp[r - j + 1] = data[j + mid]; ewa wL"
} -(bXSBs#
int a = temp[l]; 7'Zky2F
int b = temp[r]; M)'HCnvs'
for (i = l, j = r, k = l; k <= r; k++) { )6,de2Pb
if (a < b) { yj;sSRT
data[k] = temp[i++]; kzn5M&f>
a = temp; Vr6@>@SC
} else { S1p;nK
data[k] = temp[j--]; *.sVr7=j
b = temp[j]; v0-cd
} %W%9j#!aN
} 10<x.8fSP
} -fwoTGlX
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/** <49K>S9O
* @param data s}UjGFP
* @param l UDL!43K
* @param i +Z7th7W/,
*/ pk?w\A}
private void insertSort(int[] data, int start, int len) { K/tRe/t}
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4}_j`d/8|
} uw[<5
} A+::O@_s
} %_+2@\
} M9V q -U18
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堆排序： mef<=5t
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package org.rut.util.algorithm.support; T&%ux=Jt
9xO#tu]
import org.rut.util.algorithm.SortUtil; $ACvV"b
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/** [`{Z}q&
* @author treeroot ,TXTS*V?
* @since 2006-2-2 W3IpHV
* @version 1.0 C ~<'rO}|
*/ c(:f\Wc3Z
public class HeapSort implements SortUtil.Sort{ U*(izD
&u /Nf&A
/* (non-Javadoc) U]^HjfX\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) *AoR==:ya
*/ O4r0R1VQM
public void sort(int[] data) { NLUT#!Gr
MaxHeap h=new MaxHeap(); sm0xLZ
h.init(data); 5b!vgm#])
for(int i=0;i h.remove(); ;i Fz?d3;
System.arraycopy(h.queue,1,data,0,data.length); !lf|7
} ap&?r`Tu
i=i(%yQ%
private static class MaxHeap{ v@Gl|29_
"}q@Y=
void init(int[] data){ OK{quM5
this.queue=new int[data.length+1]; tSVc|j
for(int i=0;i queue[++size]=data; qQA}Z*(m
fixUp(size); q*F{/N**
} dRj|g
} LV\DBDM
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private int size=0; rs,2rSsg!
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private int[] queue; O\E/. B
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public int get() { &j4xgh9
return queue[1]; a=DcZ_M
} ^cczJOxB
^aH\7J@Y
public void remove() { 5jd,{<
SortUtil.swap(queue,1,size--); 4a'N>eDR
fixDown(1); r<K(jG[:{f
} txiP!+3OWB
file://fixdown 5&v~i\Q
private void fixDown(int k) { RRRCS]y7$t
int j; 4*Q#0`um
while ((j = k << 1) <= size) { ^.1c{0Y^0
if (j < size %26amp;%26amp; queue[j] j++; 7on.4/;M
if (queue[k]>queue[j]) file://不用交换 ?Cl%{2omO
break; |K.mP4CKY
SortUtil.swap(queue,j,k); Qa.<K{m#?
k = j; EQf[,
} (iL|Sq&}b
} f!s=(H;
private void fixUp(int k) { Zb1<:[
while (k > 1) { q:dHC,fO
int j = k >> 1; t.laO. 3
if (queue[j]>queue[k]) /9HVY %n
break; k Mu8"Az
SortUtil.swap(queue,j,k); *^f<W6xc
k = j; lTd #bN
} x7~r,x(xM
} !P)O(i=
QA<Jr5Ys
} vH#huZA?7
f>W-
} ^c&L,!_)H
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SortUtil： <)u`~$n2
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package org.rut.util.algorithm; sC='_h
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import org.rut.util.algorithm.support.BubbleSort; +tVaBhd!
import org.rut.util.algorithm.support.HeapSort; |962G1.
import org.rut.util.algorithm.support.ImprovedMergeSort; j#+!\ft5
import org.rut.util.algorithm.support.ImprovedQuickSort; VxVE
import org.rut.util.algorithm.support.InsertSort; Vl:^>jTki
import org.rut.util.algorithm.support.MergeSort; 1XD,uoxB
import org.rut.util.algorithm.support.QuickSort; BZR:OtR^
import org.rut.util.algorithm.support.SelectionSort; NdzSz]q}
import org.rut.util.algorithm.support.ShellSort; !4^C #{$
rNB_W.
/** K?BOvDW"`
* @author treeroot P/Q!<I
* @since 2006-2-2 >U%gctIg
* @version 1.0 DP3PYJ%+B
*/ hJZV}a|
public class SortUtil { 8$0rR55
public final static int INSERT = 1; \3pc"^W
public final static int BUBBLE = 2; Mdl{}P0)
public final static int SELECTION = 3; dvt9u9Vg=
public final static int SHELL = 4; 4iKgg[)7`=
public final static int QUICK = 5; ZuS0DPS`L
public final static int IMPROVED_QUICK = 6; #6+@M
public final static int MERGE = 7; b/C`Jp
public final static int IMPROVED_MERGE = 8; ><gG8MH0'
public final static int HEAP = 9; QNpqdwu%h
S/4^ d &Gr
public static void sort(int[] data) { QWzB6H]
sort(data, IMPROVED_QUICK); Sgp;@4`M
} px}|Mu7z~
private static String[] name={ >_|O1H./4
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" uf&myV7
}; [%77bv85.G
x "^Xj]-
private static Sort[] impl=new Sort[]{ P] UJ0b
new InsertSort(), "4uS3h2r
new BubbleSort(), C/TF-g-_Y
new SelectionSort(), e>(<eu~P
new ShellSort(), !V i@1E
new QuickSort(), SjwyLc
new ImprovedQuickSort(), cp#JBHO
new MergeSort(), A?-oL='
new ImprovedMergeSort(), yIDD@j=l
new HeapSort() \}p6v}
}; ( 5tvfz%
L5 veX}
public static String toString(int algorithm){ %*`J k#W:
return name[algorithm-1]; UrYZ`J
} QlO0qbG[y
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public static void sort(int[] data, int algorithm) { j(RWO
impl[algorithm-1].sort(data); j^^Ap
} DDPxmuNG
hvDNz"ec{
public static interface Sort { `kZ@Zmj#
public void sort(int[] data); 3td)'}
} ]dI2y=[!C
w8Sp<6*
public static void swap(int[] data, int i, int j) { 6P5Ih
int temp = data; ?34 e-
data = data[j]; iVy7elT;R
data[j] = temp; V`bi&1?6\
} 5A sP5
} ,!7 H]4Qx