[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; xi;`ecqS<
} RY*U"G0#w
int i1=l; 5i{j' {_(8
int i2=mid+1; EDs\,f}
for(int cur=l;cur<=r;cur++){ ,3 u}x,
if(i1==mid+1) rk)`\=No
data[cur]=temp[i2++]; dcWD(-
else if(i2>r) y$R_.KbO
data[cur]=temp[i1++]; ##4HYQ%E
else if(temp[i1] data[cur]=temp[i1++]; Mh 7DV
else )sQ*Rd@t[8
data[cur]=temp[i2++]; -RK- Fu<e
} uhutg,[
} m<2M4u
Pd]|:W< E
} 9]o-O]7/
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改进后的归并排序: -;k+GrLr^
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package org.rut.util.algorithm.support; xFg>SJ7]
u,Kly<0j
import org.rut.util.algorithm.SortUtil; S?BG_J6A7
26x[X.C:
/** 1 I",L&S1
* @author treeroot {P#|zp4C{
* @since 2006-2-2 U\!X,a*ts{
* @version 1.0 CQDkFQq-dq
*/ -1ub^feJ,
public class ImprovedMergeSort implements SortUtil.Sort { n>U5R_T
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private static final int THRESHOLD = 10; 4]}'Hln*U
H~z`]5CN
/* mXfXO*Cnp
* (non-Javadoc) VBcPu
* QUQ'3
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `,*5wBC
*/ 1D!<'`)AY
public void sort(int[] data) { # c^z&0B}
int[] temp=new int[data.length]; WvZ8/T'x
mergeSort(data,temp,0,data.length-1); }|5Pr(I
} Fh9h,' V"
D=&Me=$
private void mergeSort(int[] data, int[] temp, int l, int r) { .y:U&Rw4
int i, j, k; mBON$sF|
int mid = (l + r) / 2; b<gr@WF
if (l == r) >!)DM]Ri
return; YQA,f#
if ((mid - l) >= THRESHOLD) Q#[9|A9
mergeSort(data, temp, l, mid); W-lN>]5}m
else fZA4q0
insertSort(data, l, mid - l + 1); }txX;"/
if ((r - mid) > THRESHOLD) (Px OE
mergeSort(data, temp, mid + 1, r); Vj>8a)"B5a
else sZF6h=67D
insertSort(data, mid + 1, r - mid); <0q;NrvUb
Qv/=&_6
for (i = l; i <= mid; i++) { *<ewS8f*6
temp = data; 0'?L#K
} UN<]N76!
for (j = 1; j <= r - mid; j++) { Gjo`&#
temp[r - j + 1] = data[j + mid]; u!qP
} h>OfOx/{q9
int a = temp[l]; #$qTFN
int b = temp[r]; \6*I'|5d
for (i = l, j = r, k = l; k <= r; k++) { hTi$.y!k
if (a < b) { #|PS&}6wU
data[k] = temp[i++]; xe&i^+i
a = temp; 3WIk
} else { O/(xj2~$J
data[k] = temp[j--]; vTw>JNVI
b = temp[j]; GYUn6P
} w}cPs{Vi"
} j]/RC(;?
} fMyti$1~
oIj#>1~c%
/** ]}2ZttQ?
* @param data '}bgLv
* @param l ;cN{a&
* @param i y>e.~5;
*/ _[ZO p ~
private void insertSort(int[] data, int start, int len) { < F+l
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); C/6V9;U
} :'*~uJrR
} \7'{g@C(
} ?"g2v-jTK
} U2s /2 [.
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堆排序： K?$^@N
**G9H
package org.rut.util.algorithm.support; {8,J@9NU
Y#$%iF
import org.rut.util.algorithm.SortUtil; B%+T2=&$7
IG9VdDj
/** ~|xA4u5LG
* @author treeroot yhA6i
* @since 2006-2-2 M%;hB*9
* @version 1.0 v^iL5y!
*/ yFlm[K5YD
public class HeapSort implements SortUtil.Sort{ 9.B KI/
oc0G|
/* (non-Javadoc) A`o8'+`C
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7CTFOAx#
*/ |3yL&"
public void sort(int[] data) { oJ|j#+Ft
MaxHeap h=new MaxHeap(); SPmq4
h.init(data); eb"5-0
for(int i=0;i h.remove(); ZlzjVU/E
System.arraycopy(h.queue,1,data,0,data.length); ptxbDzOz
} JKGe"
bTs?!~q
private static class MaxHeap{ yT9@!]^L
% 0+j?>#X
void init(int[] data){ 1gN=-AC
this.queue=new int[data.length+1]; !LN?PKJ
for(int i=0;i queue[++size]=data; :mn>0jK,N
fixUp(size); Cg?&wj<
} d;9FB[MmOJ
} ls:w8&`*
A*P|e-&Q8
private int size=0; t+T4-1 3a
dZ0vA\z|
private int[] queue; s 3f-7f<
O]Qd<%V'x
public int get() { =\:qo'l
return queue[1]; s?,Ek
} Opc ZU{4b
3r."j2$Hs0
public void remove() { .I0qGg
SortUtil.swap(queue,1,size--); s6.M\^
fixDown(1); 2OR{[L*
} $jqq `n_
file://fixdown 8jo p_PG'
private void fixDown(int k) { 8~z~_TD6m@
int j; kH7(@Pa
while ((j = k << 1) <= size) { nWYN Np?h
if (j < size %26amp;%26amp; queue[j] j++; Vi]W|bP
if (queue[k]>queue[j]) file://不用交换 =Bhe'.]QSx
break; -^h' >.
SortUtil.swap(queue,j,k); o{q{!7DH@
k = j; #S*/bao#
} v8[I8{41
} 4\u1TYR
private void fixUp(int k) { z Q`jP$2
while (k > 1) { ^^as'Dk
int j = k >> 1; [b>Fn%y
if (queue[j]>queue[k]) $ig0j`
break; D"rK(
SortUtil.swap(queue,j,k); J1sv[$9
k = j; hp7|m0.JW
} ?6un4EVL{
} UK O[r;
^!ZC?h!rG
} YS@ypzc/
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} ERE)A-8
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SortUtil： TNY&asQo
GyIT{M}KV
package org.rut.util.algorithm; ,<tX%n`v=
n;+LH9
import org.rut.util.algorithm.support.BubbleSort; Hmd] FC,_
import org.rut.util.algorithm.support.HeapSort; b#toM';T
import org.rut.util.algorithm.support.ImprovedMergeSort; X#TQ_T"
import org.rut.util.algorithm.support.ImprovedQuickSort; I]<_rN8~o
import org.rut.util.algorithm.support.InsertSort; B!_mC<*4`X
import org.rut.util.algorithm.support.MergeSort; (#Gw1
import org.rut.util.algorithm.support.QuickSort; ^O<&fD
import org.rut.util.algorithm.support.SelectionSort; J|kR5'?x
import org.rut.util.algorithm.support.ShellSort; ()Y4v
TKY*`?ct
/** ,t9^j3Ixg
* @author treeroot y4I6
* @since 2006-2-2 :'3XAntZA
* @version 1.0 Raxrb=7
*/ iAa.}CI,zB
public class SortUtil { gVv>9W('
public final static int INSERT = 1; SmdjyK1~8
public final static int BUBBLE = 2; =`:K{loxq
public final static int SELECTION = 3; 1V4s<m>#
public final static int SHELL = 4; qx8fRIK%
public final static int QUICK = 5; o+QE8H43
public final static int IMPROVED_QUICK = 6; f]|ysf
public final static int MERGE = 7; YoZFwRQU
public final static int IMPROVED_MERGE = 8; r(aLEJ"u?
public final static int HEAP = 9; A3no~)wZn
l(u.I2^o
public static void sort(int[] data) { *`\Pr
sort(data, IMPROVED_QUICK); Xti[[sJ
} O[s{ Gk'>
private static String[] name={ s'a/j)^
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" t2"O
}; {fF3/tL
k*E\B@W>
private static Sort[] impl=new Sort[]{ )- viGxJ@
new InsertSort(), 36%nB*
new BubbleSort(), xtE_=5$~
new SelectionSort(), !?p%xj?
new ShellSort(), !*m5F8Qm?A
new QuickSort(), LuSLkLN
new ImprovedQuickSort(), %Bn?n{/
new MergeSort(), V|/NB
new ImprovedMergeSort(), ') gi%
new HeapSort() 8a="/J
}; XKttZOiGT
i;jw\ed
public static String toString(int algorithm){ xA1hfe.9
return name[algorithm-1]; X*39c b(b
} r>"
65p?Igb
public static void sort(int[] data, int algorithm) { 04'~ta(t
impl[algorithm-1].sort(data); H]p!\H
} "@d[h,TM
wsN?[=l{s
public static interface Sort { /VzI'^
public void sort(int[] data); J(%0z:exs
} j!4et;
a1.Ptf eW|
public static void swap(int[] data, int i, int j) { _$f9]bab
int temp = data; :Jy'#c
data = data[j]; C] 9p5Hs
data[j] = temp; *R3f{/DK
} PBxCx3a{
} X4t s)>"d