[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; re^Hc(8M
} qz!Ph5(
int i1=l; t V03+&jF
int i2=mid+1; MoD?2J
for(int cur=l;cur<=r;cur++){ pj0fM{E
if(i1==mid+1) b7HffO O
data[cur]=temp[i2++]; 8Hi!kc;f6>
else if(i2>r) 5{K}?*3hJ
data[cur]=temp[i1++]; 1svi8wh
else if(temp[i1] data[cur]=temp[i1++]; Pao%pA.<
else $d/&k`
data[cur]=temp[i2++]; WkP +r9rT
} .$&Q[r3Lu
} TJ(K3/)Z
~=En+J}*
} :=Kx/E:1
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改进后的归并排序: S{#cD1>.
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package org.rut.util.algorithm.support; u,1}h L
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import org.rut.util.algorithm.SortUtil; ,+`HQdq
2&Jdf
/** UG;Y^?Ppe5
* @author treeroot CSTI?A"P
* @since 2006-2-2 6GAaV[])'
* @version 1.0 :7g=b%;
*/ P[ r];e
public class ImprovedMergeSort implements SortUtil.Sort { F'JY?
nV*y`.+
private static final int THRESHOLD = 10; VZy4_v=
W_`A"WdT.
/* (:pq77
* (non-Javadoc) dRi5hC$
* IA&L]
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `J0i.0p
*/ Y&HK1>M_
public void sort(int[] data) { j;1-p>z
int[] temp=new int[data.length]; Iu@y(wyg
mergeSort(data,temp,0,data.length-1); R\|lt)h
} N|g;W
kq=V4-a[
private void mergeSort(int[] data, int[] temp, int l, int r) { 20RXK1So
int i, j, k; :}:3i9e*2
int mid = (l + r) / 2; cO2& VC
if (l == r) >EsziRm
return; Ycr3HLJy
if ((mid - l) >= THRESHOLD) I<td1Y1q
mergeSort(data, temp, l, mid); wXMDh$
else }@1q@xU
insertSort(data, l, mid - l + 1); B+d<F[|
if ((r - mid) > THRESHOLD) xo}b= v
mergeSort(data, temp, mid + 1, r); H5CR'Rp
else GNf482
insertSort(data, mid + 1, r - mid); YTQt3=1ii
=J-5.0Q\_\
for (i = l; i <= mid; i++) { 7uorQfR?
temp = data; ._w8J"E5
} K;hh&sTB
for (j = 1; j <= r - mid; j++) { "xmP6=1
temp[r - j + 1] = data[j + mid]; .d;Iht,[
} =<r8fXWZ
int a = temp[l]; im} ?rY
int b = temp[r]; U[L9*=P;
for (i = l, j = r, k = l; k <= r; k++) { %J:SO_6
if (a < b) { Zv11uH-C
data[k] = temp[i++]; 3f" %G\
a = temp; j"^+oxH
} else { @vL20O.
data[k] = temp[j--]; -9 !.m
b = temp[j]; EN{]Qb06A
} l0&EZN0V2
} ?Xdak|?i
} bNFLO Q
JO=[YoTr
/** fO'Wj`&a
* @param data 2%*MW"Q
* @param l }i{sg#
* @param i nJ4@I7Sk;
*/ t}IkK=f
private void insertSort(int[] data, int start, int len) { 8}H1_y-g[
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); l`kWz5[~
} vZ/6\Cz
} r`)L~/
} ReiB $y6
} |KB0P@=a
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堆排序： &g2 Eptx#
DD" $1o"
package org.rut.util.algorithm.support; Y(cN}44
KH\b_>wU2
import org.rut.util.algorithm.SortUtil; %WqNiF0-
iAT)VQ&
/** #r PP*
* @author treeroot ZmOfEg|h\
* @since 2006-2-2 h:lt<y
* @version 1.0 tXJUvish
*/ eh,~^x5
public class HeapSort implements SortUtil.Sort{ VG/3xR&y
+T9:Udi
/* (non-Javadoc) v]__%_
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) q+B&orp
*/ ,=?{("+
public void sort(int[] data) { cA6lge<{~
MaxHeap h=new MaxHeap(); %OgS^_tu
h.init(data); ng:Q1Q9N
for(int i=0;i h.remove(); Y>jiXl?&
System.arraycopy(h.queue,1,data,0,data.length); 5*[2yKsTi
} iH^z:%dP
> iE!m
private static class MaxHeap{ R |KD&!~Z
2lL,zFAq
void init(int[] data){ oD}uOC}FS{
this.queue=new int[data.length+1]; 'zh7_%
for(int i=0;i queue[++size]=data; fDx9iHGv
fixUp(size); Be+0NXLVy
} @ P|LLG'
} S*AERm
eAPXWWAZJ1
private int size=0; 64:fs?H
?f/n0U4w
private int[] queue; 9n}p;3{f
+2 Af&~T
public int get() { !x'/9^i~v
return queue[1]; YJ(*wByM
} xC C:BO`pw
VbBPB5 $q
public void remove() { %'0TXr$
SortUtil.swap(queue,1,size--); mDZ*E!B
fixDown(1); .$@R{>%U
} klUQkz |<a
file://fixdown OzC\9YeA
private void fixDown(int k) { cyJG8f
int j; %,ngRYxT#
while ((j = k << 1) <= size) { |>z3E z
if (j < size %26amp;%26amp; queue[j] j++; -.{g}R%
if (queue[k]>queue[j]) file://不用交换 h;3cd0
break; #pcP!
SortUtil.swap(queue,j,k); ;NlWb =
k = j; ``E/m<r:$
} <id}<H
} " LJq%E
private void fixUp(int k) { }%D^8>S
while (k > 1) { |^@dFOz
int j = k >> 1; d|4}obCt
if (queue[j]>queue[k]) sN5B7)Vc
break; Qyy.IPTP
SortUtil.swap(queue,j,k); T9s2bC.z55
k = j; UT="2*3gz
} rb{P :MX
} #h/Mbj~S
0>zbCubPH
} "le>_Ze_>|
^i:B+ rl
} 0 Us5
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SortUtil： tr7<]Hm:
vv=VRhwF
package org.rut.util.algorithm; gJM`[x`T
@'GGm#<
import org.rut.util.algorithm.support.BubbleSort; \m1~jMz*>k
import org.rut.util.algorithm.support.HeapSort; T*KMksjxm`
import org.rut.util.algorithm.support.ImprovedMergeSort; M}!2H*
import org.rut.util.algorithm.support.ImprovedQuickSort; Qca&E`~Q
import org.rut.util.algorithm.support.InsertSort; 9*a=iL*Nw
import org.rut.util.algorithm.support.MergeSort; :^(>YAyHj^
import org.rut.util.algorithm.support.QuickSort; /d%=E
import org.rut.util.algorithm.support.SelectionSort; 4^URX>nx8
import org.rut.util.algorithm.support.ShellSort; +!|9hF'
F+u|HiYG
/** 0'IBN}
* @author treeroot tToTxf~
* @since 2006-2-2 ,N0#!<}4
* @version 1.0 L`24?Y{
*/ y99mC$"Ee`
public class SortUtil { Jkek-m
public final static int INSERT = 1; 4]E3cAJ
public final static int BUBBLE = 2; e2A-;4?_
public final static int SELECTION = 3; bcYF\@};
public final static int SHELL = 4; Gh}*q|Lz
public final static int QUICK = 5; Gy(=706
public final static int IMPROVED_QUICK = 6; O6OP =K!t:
public final static int MERGE = 7; y`=]T>X&x
public final static int IMPROVED_MERGE = 8; [W7CXZDd
public final static int HEAP = 9; j*vYBGD
sQ\8>[]
public static void sort(int[] data) { 5^x1cUB]
sort(data, IMPROVED_QUICK); 5@BBoeG
} \*<d{gZ~
private static String[] name={ n<u $=H
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" =z /dcC$r
}; {Ja!~N;3
?pd8w#O
private static Sort[] impl=new Sort[]{ a5TioQ
new InsertSort(), mVpMh#zw
new BubbleSort(), Sb82}$sO
new SelectionSort(), (P:<t6;+
new ShellSort(), p|p l
new QuickSort(), #%h-[/
new ImprovedQuickSort(), V]db'qB\
new MergeSort(), |mw.qI|
new ImprovedMergeSort(), Zo~
new HeapSort() Iepsz
}; lp^<3o*1
OL^l 3F
public static String toString(int algorithm){ c$yk s
return name[algorithm-1]; ybKWOp:O
} #$8% w
}*S `qW;B
public static void sort(int[] data, int algorithm) { 5lUF7:A>#
impl[algorithm-1].sort(data); )O@]uY
} b?lD(fa&
.E8_Oz
public static interface Sort { 4?q<e*W
public void sort(int[] data); [rV>57`YD
} 7E79-r&n
Eu@huN*/
public static void swap(int[] data, int i, int j) { hFy;ffs.
int temp = data; TI,&!E?;
data = data[j]; [R^iF
data[j] = temp; WGZ9B^A
} UKT%13CO4U
} 9\BT0kx