[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; c1|o^eZ
} ed{z^!w4
int i1=l; .a=M@;p
int i2=mid+1; !!2~lG<]
for(int cur=l;cur<=r;cur++){ ]P(Eo|)m
if(i1==mid+1) LE1&atq
data[cur]=temp[i2++]; >GT0x
else if(i2>r) D-ug$ZRg
data[cur]=temp[i1++]; px4Z
else if(temp[i1] data[cur]=temp[i1++]; (~}l?k
else 5U1@wfKE3>
data[cur]=temp[i2++]; ;-*4 (3lu
} xBB:b\
} @D0Ut9)
}{iR+MX
} =b`>ggw#
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改进后的归并排序: EVb'x Zr
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package org.rut.util.algorithm.support; ,{'~J @
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import org.rut.util.algorithm.SortUtil; v]VIUVd
O "{o (
/** !29 Rl`9
* @author treeroot &]#D`u
* @since 2006-2-2 ~0/=5 dC
* @version 1.0 v`wPdb
*/ LgBs<2
public class ImprovedMergeSort implements SortUtil.Sort { ?:U6MjlQ"{
OY[N%wr!
private static final int THRESHOLD = 10; :FxZdE
4jG@ #
/* kx'6FkZPIr
* (non-Javadoc) WU=Os8gR
* <#`<Ys3b*!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 0CTI=<;
*/ @Chj0wWZ>
public void sort(int[] data) { c?IIaj!
int[] temp=new int[data.length]; _ZR2?y-M
mergeSort(data,temp,0,data.length-1); X_%78$N-a`
} #wC4$y<>
Ma{|+\Q.Z
private void mergeSort(int[] data, int[] temp, int l, int r) { 4<lZ;M"
int i, j, k; q=96Ci_a
int mid = (l + r) / 2; OsC1('4@
if (l == r) `^_.E:f
return; @<alWBS
if ((mid - l) >= THRESHOLD) 8(g:i#~
mergeSort(data, temp, l, mid); ->93.sge
else *B3` #t
insertSort(data, l, mid - l + 1); Dj<Vn%d*
if ((r - mid) > THRESHOLD) p=Vm{i7
mergeSort(data, temp, mid + 1, r); :k(aH Ua
else p&ZD1qa
insertSort(data, mid + 1, r - mid); cT.1oaAM0
.^Ek1fi.
for (i = l; i <= mid; i++) { rJ<v1Yb
temp = data; h?$4\^/
} -ud!j
for (j = 1; j <= r - mid; j++) { W6wgX0H
temp[r - j + 1] = data[j + mid]; ;itz`9T
} d]a*)m&
int a = temp[l]; S{ *RF)
int b = temp[r]; FQ O6w'
for (i = l, j = r, k = l; k <= r; k++) { zeR!Y yt!
if (a < b) { Jh }3AoD
data[k] = temp[i++]; ((t8
a = temp; [>6:xGSe9X
} else { z?E:s.4F
data[k] = temp[j--]; tK]r>?Y\
b = temp[j]; NCl={O9<j
} Iy`Zh@"~
} b`%/*
} 4}?Yp e-
~0worI?
/** <L5[#V_
* @param data <4(rY9
* @param l B23R9.FK
* @param i j7uiZU;3Rx
*/ zXMIDrq
private void insertSort(int[] data, int start, int len) { >Wy@J]Y#
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); qY0GeE>N
} 6'?Y]K
} P_i2yhpK
} ,hX03P-X
} >F@7}Y(
L6U[H#3(
堆排序： j7O7P+DmS
2:2rwH }e
package org.rut.util.algorithm.support; [Ma&=2h
yjN|PqtSV
import org.rut.util.algorithm.SortUtil; ,D~C40f
QbS w<V
/** {$Fg+~
* @author treeroot "1`c^
* @since 2006-2-2 HiVF<tN
* @version 1.0 9I9J}&4
*/ ggX'`bK
public class HeapSort implements SortUtil.Sort{ v#D9yttO{
.F}ZP0THnZ
/* (non-Javadoc) f@>27&'WV
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /[_>U{~P#
*/ nvpdu)q<
public void sort(int[] data) { v,1.n{!;
MaxHeap h=new MaxHeap(); Lsuc*Ps
h.init(data); nG{jx_{`
for(int i=0;i h.remove(); O/l|\n
System.arraycopy(h.queue,1,data,0,data.length); !L-.bve!
} '{U56^b]
q4(&.Al\@
private static class MaxHeap{ )SUT+x(DU
g24)GjDi
void init(int[] data){ 6}{2W<
this.queue=new int[data.length+1]; Z]oa+W+
for(int i=0;i queue[++size]=data; RH>b,
fixUp(size); <@5#
} s`GSc)AI
} y&9v0&o
H6rWb6i
private int size=0; 3(6i6 vV
>y%$]0F1
private int[] queue; 1 dI
z`5+BL,|ND
public int get() { }"Y]GH4Y
return queue[1]; >RE&>T^8
} g#5g0UP)V
Z4bN|\I
public void remove() { =F8uuYX%m
SortUtil.swap(queue,1,size--); '-gk))u>)
fixDown(1); =@V4V} ?
} uoaF(F-
file://fixdown k/!Vv#8
private void fixDown(int k) { qV8;;&8r
int j; 9v<BO$ ,a
while ((j = k << 1) <= size) { D-A#{e _
if (j < size %26amp;%26amp; queue[j] j++; 0xIr:aFF
if (queue[k]>queue[j]) file://不用交换 ?i)-K?4Sb
break; aztP`S$h
SortUtil.swap(queue,j,k); SM![ yC
k = j; E9%xSMS8@
} 26.iFt/:
} u=#LY$
private void fixUp(int k) { HSp*lHU
while (k > 1) { _N9yC\
int j = k >> 1; (al7/EhY
if (queue[j]>queue[k]) G-bG}9vc]
break; 9%kY8#%SV
SortUtil.swap(queue,j,k); pRUN[[L
k = j; aSXoYG0\
} -(Taj[;[
} +J_A*B
B2WPjhzD
} v#YO3nD
)0fQ(3oOg
} 0MrtJNF]_O
9!gmS?f
SortUtil： 2~Gcoda
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package org.rut.util.algorithm; /o+, =7hY
\qV5mD]"M
import org.rut.util.algorithm.support.BubbleSort; {B?%r[nW
import org.rut.util.algorithm.support.HeapSort; zrRt0}?xl
import org.rut.util.algorithm.support.ImprovedMergeSort; IP&En8W+
import org.rut.util.algorithm.support.ImprovedQuickSort; 7<|1 xOT
import org.rut.util.algorithm.support.InsertSort; #x)G2T'?
import org.rut.util.algorithm.support.MergeSort; ;=*b:y Y
import org.rut.util.algorithm.support.QuickSort; 6:ZqS~-
import org.rut.util.algorithm.support.SelectionSort; 5}e-\:J>B
import org.rut.util.algorithm.support.ShellSort; :v1'(A1t
2"yzrwZ:
/** OtY.s\m y
* @author treeroot dZ`nv[]k~
* @since 2006-2-2 {BY`Wu:w
* @version 1.0 .Z'CqBr[:
*/ \ $X3n\
public class SortUtil { 3(E"$Se,f
public final static int INSERT = 1; P]]9Sqo7
public final static int BUBBLE = 2; |K aXek
public final static int SELECTION = 3; b;9v.MZ4>g
public final static int SHELL = 4; y !47!Dn
public final static int QUICK = 5; `^wF]R
public final static int IMPROVED_QUICK = 6; zRsT6u
public final static int MERGE = 7; Z9~~vf#
public final static int IMPROVED_MERGE = 8; }Jh!B|
public final static int HEAP = 9; XMa(XOnX
f*2V
public static void sort(int[] data) { qaG%PH}a
sort(data, IMPROVED_QUICK); l \xIGs
} e>uV8!u
private static String[] name={ vyN=X]p
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wf6ZzG:
}; V6BCW;
#++MoW}'g
private static Sort[] impl=new Sort[]{ q fadsVp
new InsertSort(), ',*I=JW;
new BubbleSort(), kx]f`b
new SelectionSort(), HEht^/pJ
new ShellSort(), ,UH`l./3DX
new QuickSort(), ) ;-AT^
new ImprovedQuickSort(), 5t:4%
new MergeSort(), 67/hhO
new ImprovedMergeSort(), 3/}=x<ui
new HeapSort() MfCu\[qOz
}; - FA#hUK$
,5t.0XqS
public static String toString(int algorithm){ 0-l @U{
return name[algorithm-1]; JAmv7GL'6
} A~h.,<+"
Pt";f
public static void sort(int[] data, int algorithm) { SZ1+h TY7d
impl[algorithm-1].sort(data); Zo-s_6uC
} N$:[`,
~WR6rc
public static interface Sort { jW?.>(
public void sort(int[] data); r\` R$
} G80d!*7
G?'L1g[lc
public static void swap(int[] data, int i, int j) { Ct$e`H!;
int temp = data; JS!rZi
data = data[j]; D-E30b]e
data[j] = temp; s-o0N{b?#'
} jP@H$$-=wH
} /G G QO$'