[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; O5E\#*<K
} D&.+Dx^G
int i1=l; i7iL[+f]Q
int i2=mid+1; "wdC/
for(int cur=l;cur<=r;cur++){ ]c*&5c$
if(i1==mid+1) =ove#3
data[cur]=temp[i2++]; KZ&{Ya
else if(i2>r) H>2)R7h
data[cur]=temp[i1++]; }s? 9Hnqa
else if(temp[i1] data[cur]=temp[i1++]; *M09Y'5]
else )[>{ Ie2
data[cur]=temp[i2++]; m$ "B=b2
} X"*pt5B6`
} I_\j05
VTS8IXz
} ZPRkk?M}.
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改进后的归并排序: [8[g_
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package org.rut.util.algorithm.support; *{6{ZKM
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import org.rut.util.algorithm.SortUtil; C`Zz\DNG@
@w?hXK=
/** ^i:%0"[*^i
* @author treeroot w6aq/m"'
* @since 2006-2-2 FbhF45H
* @version 1.0 jYI\.bc
*/ =)!sWY:
public class ImprovedMergeSort implements SortUtil.Sort { l]C#bL>i
G*^4+^Vz?
private static final int THRESHOLD = 10; Dn~c
lk;4l Z
/* HHzAmHt
* (non-Javadoc) Bq@_/*'*Y
* gM>geWB<
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ebfT%_N
*/ UU'0WIbY6
public void sort(int[] data) { -c4g;;%
int[] temp=new int[data.length]; xl>8B/Zmf#
mergeSort(data,temp,0,data.length-1); 6 );8z!+
} , Ox$W
P@| W\
private void mergeSort(int[] data, int[] temp, int l, int r) { JCO+_d#x
int i, j, k; sBm)D=Kll
int mid = (l + r) / 2; >zA*W<g
if (l == r) rel_Z..~
return; 4]G J+a
if ((mid - l) >= THRESHOLD) !:baG]Y
mergeSort(data, temp, l, mid); _TntZv.?
else '9u(9S
insertSort(data, l, mid - l + 1); z_f^L %J0
if ((r - mid) > THRESHOLD) FdGnNDl*e
mergeSort(data, temp, mid + 1, r); Y#[xX2z9
else T_)G5a
insertSort(data, mid + 1, r - mid); -kzp>=
9x`1VR :
for (i = l; i <= mid; i++) { ij5|P4Eka
temp = data; B_mT[)ut
} ;&c9!LfP
for (j = 1; j <= r - mid; j++) { *47HN7
temp[r - j + 1] = data[j + mid]; o3W@)|>
} .fAHP 5-
int a = temp[l]; nD.K*#u
int b = temp[r]; 8'qq!WR~
for (i = l, j = r, k = l; k <= r; k++) { y**YFQ*sc
if (a < b) { HSR,moI
data[k] = temp[i++]; NK\0X5##.
a = temp; nvB<pSm
} else { T*z*x=<5
data[k] = temp[j--]; A01PEVd@A
b = temp[j]; m$bYx~K
} 6L"b O'_5K
} ;;S9kNp^v
} H1c>3c
[}I|tb>Pg
/** U1Y0G[i)
* @param data qnFg7X>C,
* @param l W2{4s 1
* @param i h<G7ocu!
*/ s14D(:t(
private void insertSort(int[] data, int start, int len) { OP|X-
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); !5 ?<QKOe
} <m/XGFc
} Dtox/ ,"
} ):\+%v^
} `(r0+Qx
+~EnrrT+W
堆排序： uSJLIb
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package org.rut.util.algorithm.support; GX'S4B
Ej $.x6:
import org.rut.util.algorithm.SortUtil; Yfx?3
)-m/(-
/** p+228K ;H
* @author treeroot Y4+iNdd
* @since 2006-2-2 )X3 |[4R
* @version 1.0 h1y3gl[;TD
*/ 2UopGxrPKw
public class HeapSort implements SortUtil.Sort{ Fr-Vq=j&
L#WGOl
/* (non-Javadoc) '!`| H 3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ixL[(*V
*/ ^x Z=";eq
public void sort(int[] data) { --k!KrL
MaxHeap h=new MaxHeap(); 1+[,eq
h.init(data); s)Xz}QPK.
for(int i=0;i h.remove(); qC-4X"y+
System.arraycopy(h.queue,1,data,0,data.length); 5~$WSL?O)
} W.59Al'
cG(%P$
private static class MaxHeap{ s`pdy$
%.wx]:o
void init(int[] data){ %0({MU
this.queue=new int[data.length+1]; B`w8d[cL7
for(int i=0;i queue[++size]=data; G *<g%"
fixUp(size); RB6TM
} bN|1%[7
} v?}rA%so
Js.G hTs
private int size=0; JxKd
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private int[] queue; [q/eRIS_
A'"J'q*t
public int get() { YgtW(j[
return queue[1]; b8[ ayy
} =L;g:hc<
sQ&<cBs2
public void remove() { 7W+{U02O
SortUtil.swap(queue,1,size--); iG"1~/U
fixDown(1); x7i,jMR
} JUJrtKS
file://fixdown %|ioNXMu
private void fixDown(int k) { IR&b2FTcU
int j; 7#*`7 K'P!
while ((j = k << 1) <= size) { y'<5P~W!a
if (j < size %26amp;%26amp; queue[j] j++; DYrci?8Ith
if (queue[k]>queue[j]) file://不用交换 b/tcD r
break; cV7a, *
SortUtil.swap(queue,j,k); AmUH]+5KT
k = j; Tt_QAIl
} !<F5W<V
} i&<@}:,
private void fixUp(int k) { ]4'V59\
while (k > 1) { '$4&q629d
int j = k >> 1; %6&c3,?U\n
if (queue[j]>queue[k]) B-|C%~fe
break; g>a% gVly
SortUtil.swap(queue,j,k); ACI.{`SrQ=
k = j; zs'Jgm.v
} 6I|9@~!y[
} w;kiH+&
z)R\WFBW
} #8%~u+"N
P` Gb}]rW
} }_Y\6fcd
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SortUtil： vtzbF1?O
%4/X;w\3
package org.rut.util.algorithm; aq9Ej]1b
N0YJ'.=8,
import org.rut.util.algorithm.support.BubbleSort; kPSi6ci
import org.rut.util.algorithm.support.HeapSort; Nig)!4CG
import org.rut.util.algorithm.support.ImprovedMergeSort; ~`0=-Qkd
import org.rut.util.algorithm.support.ImprovedQuickSort; A8ClkLC;I
import org.rut.util.algorithm.support.InsertSort; -(E-yCu
import org.rut.util.algorithm.support.MergeSort; |KSoS#Y
import org.rut.util.algorithm.support.QuickSort; WVx^}_FD0
import org.rut.util.algorithm.support.SelectionSort; ko~e*31_E
import org.rut.util.algorithm.support.ShellSort; xfqU atC
T1RICIf1F
/** bGik~
* @author treeroot F[X;A\
* @since 2006-2-2 c}2"X,
* @version 1.0 `t7GYmw^#
*/ FCChB7c`
public class SortUtil { Emv9l~mIu
public final static int INSERT = 1; ~tB9kLFG
public final static int BUBBLE = 2; sb%l N
public final static int SELECTION = 3; _!o0bYD
public final static int SHELL = 4; tSiQrI
public final static int QUICK = 5; s~I#K[[5
public final static int IMPROVED_QUICK = 6; ?T>NvKF
public final static int MERGE = 7; :(4];Va
public final static int IMPROVED_MERGE = 8; (y2P."
public final static int HEAP = 9; sP%J`L@h
@SAJ*hfb0
public static void sort(int[] data) { n:JG+1I
sort(data, IMPROVED_QUICK); 22D,,nC0+=
} eie u|_
private static String[] name={ P}D5 j
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" $# b
}; liTAV9<
>V@,K z1
private static Sort[] impl=new Sort[]{ a0cW=0l=
new InsertSort(), o6S`7uwJ*/
new BubbleSort(), `Ro>?H
new SelectionSort(), l4q7,%G
new ShellSort(), w%f51Ex
new QuickSort(), 4?~Ei[KgQn
new ImprovedQuickSort(), 9q"G g?
new MergeSort(), OC2%9Igx0
new ImprovedMergeSort(), rXnG"A
new HeapSort() ,CnUQx0
}; 90+Hv:wF
GI#TMFz3
public static String toString(int algorithm){ Ji:0J},m
return name[algorithm-1]; 8?k.4{?
} 8j!(*'J.
7R".$ p
public static void sort(int[] data, int algorithm) { u9dL-Nr`
impl[algorithm-1].sort(data); s B!2't
} WFpR@53Db
Qmn'G4#@E
public static interface Sort { *g/@-6
public void sort(int[] data); =;HmU.Uek%
} Voc&T+A m
TVFxEV7Fx
public static void swap(int[] data, int i, int j) { 9 !qVYU42(
int temp = data; nzORG
data = data[j]; gb/M@6/j
data[j] = temp; JSm3ZP|GqJ
} ]6{\`a
} uu582%tiG