[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; wAJ=rRI
} Bk^o$3#
int i1=l; F S$8F
int i2=mid+1; mlUj%:Gm#
for(int cur=l;cur<=r;cur++){ iq^;csyKb
if(i1==mid+1) Koj9]2<0
data[cur]=temp[i2++]; B !wr}]
else if(i2>r) z-:>[Sn
data[cur]=temp[i1++]; Hs_7oy|P
else if(temp[i1] data[cur]=temp[i1++]; uBn35%
else Rha|Rk~
data[cur]=temp[i2++]; t* p%!xsH
} /Ahh6=qQY
} #&fu"W+D96
ledr[)
} |`s:&<W+kp
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改进后的归并排序: 8j :=D!S
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package org.rut.util.algorithm.support; v(=0hY9 O
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import org.rut.util.algorithm.SortUtil; ,V^$Meh
^".6~{
/** 6j+X@|2^
* @author treeroot ;*ULrX4[
* @since 2006-2-2 O: #SjjK
* @version 1.0 r* l c#
*/ lV$#>2Hh5
public class ImprovedMergeSort implements SortUtil.Sort { qZ +K4H
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private static final int THRESHOLD = 10; }TAG7U*
-_eG/o=M
/* RCxwiZaf33
* (non-Javadoc) E H%hL5(
* JAI.NKB3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 25j\p{*
*/ m~fDDQs
public void sort(int[] data) { M%W#0
int[] temp=new int[data.length]; #};Zgixo$
mergeSort(data,temp,0,data.length-1); };EB[n
} 065=I+Vo
TeO'E<@
private void mergeSort(int[] data, int[] temp, int l, int r) { kHhku!CH
int i, j, k; |JP'j1 Ka
int mid = (l + r) / 2; e@ $|xa")
if (l == r) M)AvcZNs
return; h@\HPYi#.
if ((mid - l) >= THRESHOLD) ?r5a*
mergeSort(data, temp, l, mid); r.6?|
else ,?Zy4-
insertSort(data, l, mid - l + 1); 53pT{2]zAi
if ((r - mid) > THRESHOLD) s.n:;8RibP
mergeSort(data, temp, mid + 1, r); qDz[=6BF
else x;-D}#
insertSort(data, mid + 1, r - mid); }UQ,B
@LDs$"f9=
for (i = l; i <= mid; i++) { " vc4QH$
temp = data; SBf=d<j 1)
} mV)t
for (j = 1; j <= r - mid; j++) { hY!>>
temp[r - j + 1] = data[j + mid]; DUH_LnHw)
} Q9B!0G.-bs
int a = temp[l]; V0&7MY*
int b = temp[r]; 01uj-!D$@
for (i = l, j = r, k = l; k <= r; k++) { 'Ffvd{+:8
if (a < b) { ~l{Qz0&
data[k] = temp[i++]; W}}ZP];
a = temp; {fX~%%c"
} else { JG1q5j##]b
data[k] = temp[j--]; s0/m qZ]s
b = temp[j]; 7Kb&BF|Q
} C8)Paop$
} Aayd3Ph0%
} 1$6 u
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/** o@]n<ZYo
* @param data _x#y
* @param l bAuiMw7!
* @param i V[kn'QkWv
*/ L~by`q N_
private void insertSort(int[] data, int start, int len) { jG)66E*"
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); Y9vVi]4
} *yo'Nqu
} -yg;,nCg
} Q)qJ6-R|HD
} U5@B7v1
pF8:?p['z
堆排序： * LWihal
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package org.rut.util.algorithm.support; (njTS+?
4;gw&sFF
import org.rut.util.algorithm.SortUtil; ggYi7Wzsd
F MYcZ+4
/** =MD)F
* @author treeroot PxvxZJf$@
* @since 2006-2-2 e^\#DDm
* @version 1.0 `w8cV?
*/ b9 li
public class HeapSort implements SortUtil.Sort{ <w8H[y"c
ImH9 F\
/* (non-Javadoc) 0Q8iX)
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) g}K/ba'
*/ ,1lW`Krx
public void sort(int[] data) { '&K' 0qG
MaxHeap h=new MaxHeap(); QMrH%Y
h.init(data); E?|NYu#I6
for(int i=0;i h.remove(); X%fLV(
System.arraycopy(h.queue,1,data,0,data.length); !8W0XUqh+
} CRrEs 18;#
IB 4L(n1
private static class MaxHeap{ 1p&=tN
=?wDQ:
void init(int[] data){ QR8]d1+GV
this.queue=new int[data.length+1]; nGc'xQy0
for(int i=0;i queue[++size]=data; PU B0H
fixUp(size); )J+rt^4|
} nU\.`.39 +
} T2)CiR-b
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private int size=0; {TMng&
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private int[] queue; uGW#z_{(n
B>\q!dX3
public int get() { 0oBAJP
return queue[1]; F{.g05^y
} 6cbV[!BL
l=S!cj;
public void remove() { Gi$\th,
SortUtil.swap(queue,1,size--); KZ^>_K&
fixDown(1); wc"~8Ah
} qf<o"B|_9
file://fixdown '.S02=/
private void fixDown(int k) { {Dy,|}7s
int j; Az#kE.8b*A
while ((j = k << 1) <= size) { -;qK_x
if (j < size %26amp;%26amp; queue[j] j++; \:q@I]2
if (queue[k]>queue[j]) file://不用交换 Dvl\o;
break; Nt?=0X|M
SortUtil.swap(queue,j,k); r;H#cMj
k = j; `022gHYv
} _,UYbD\[J}
} +ek6}f#
private void fixUp(int k) { [)I W9E v
while (k > 1) { FB>P39u
int j = k >> 1; d.B<1"MQ
if (queue[j]>queue[k]) '}(Fj2P79
break; m6xbO
SortUtil.swap(queue,j,k); M\IdQY-c
k = j; oblw!)
} n:s _2h(u
} mc@Z+t'
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} een62-`
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} ~YviXSW
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SortUtil： {CVZ7tU7]
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package org.rut.util.algorithm; 'X/:TOk{W
mYXL
import org.rut.util.algorithm.support.BubbleSort; ) R\";{`M
import org.rut.util.algorithm.support.HeapSort; ]_|%!/_
import org.rut.util.algorithm.support.ImprovedMergeSort; "e>9R'y
import org.rut.util.algorithm.support.ImprovedQuickSort; YWV)C?5x&
import org.rut.util.algorithm.support.InsertSort; d0zp89BEn
import org.rut.util.algorithm.support.MergeSort; Bqk+ne
import org.rut.util.algorithm.support.QuickSort; <+b~E,
import org.rut.util.algorithm.support.SelectionSort; !A|}_K1Cr
import org.rut.util.algorithm.support.ShellSort; JPj/+f
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/** vQ$"|8,
* @author treeroot 1 un!
* @since 2006-2-2 =i7CF3
* @version 1.0 >!o!rs
*/ Nr]guC?rE
public class SortUtil { [=Nv=d<[p
public final static int INSERT = 1; 4ISIg\:c*
public final static int BUBBLE = 2; pXh`o20I
public final static int SELECTION = 3; I!K-* AB
public final static int SHELL = 4; o4z|XhLr
public final static int QUICK = 5; 0XyPG
public final static int IMPROVED_QUICK = 6; [E2".F3
public final static int MERGE = 7; UalwK
public final static int IMPROVED_MERGE = 8; "EWq{l_I5$
public final static int HEAP = 9; PtL8Kd0`C
.uN(44^+x
public static void sort(int[] data) { uLI;_,/:
sort(data, IMPROVED_QUICK); JZ-64OT
} G[OJ<px
private static String[] name={ 'C:i5?zh(q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" Rx.5;2m
}; h_\W7xt
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private static Sort[] impl=new Sort[]{ &rG]]IO
new InsertSort(), UKB/>:R
new BubbleSort(), +9<:z\B|
new SelectionSort(), X"HVK+
new ShellSort(), />>KCmc
new QuickSort(), |B^Picu
new ImprovedQuickSort(), ke/4l?zs
new MergeSort(), eU]I !pI<
new ImprovedMergeSort(), F)/4#[
new HeapSort() N1vA>(2A
}; <5ULu(b&$
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public static String toString(int algorithm){ evVxzU&
return name[algorithm-1]; 8S[bt@v
} a^O>i#i
#D>:'ezm
public static void sort(int[] data, int algorithm) { FZ8Qj8
impl[algorithm-1].sort(data); dWhqu68_
} #AO}JP
"Z dI~
public static interface Sort { TKEcbGhy
public void sort(int[] data); OsYZa`$,
} ps/|^8aGZ
>.XXB 5a
public static void swap(int[] data, int i, int j) { x{rjngp2
int temp = data; V%zo[A
data = data[j]; 0B~x8f
data[j] = temp; C}9|e?R[Rz
} {q;_Dd
} .I^Y[_.G