[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; K?) &8S
} u\50,N9Wp{
int i1=l; l2xM.vR
int i2=mid+1; tv5SQ+AI3
for(int cur=l;cur<=r;cur++){ z`lDD
if(i1==mid+1) }.x?$C+\"
data[cur]=temp[i2++]; SwLul4V
else if(i2>r) {@k5e) Q
data[cur]=temp[i1++]; O.}{s;
else if(temp[i1] data[cur]=temp[i1++]; H.*XoktC]
else 5MT$n4zKu
data[cur]=temp[i2++]; Po% V%~
} S_WYU&8
} VGkwrS;+I
JW (.,Ztm
} P/4]x@{ih
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改进后的归并排序: 9%pq+?u9
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package org.rut.util.algorithm.support; Jc/*w
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import org.rut.util.algorithm.SortUtil; LGV"WE
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/** lo Oh }y+
* @author treeroot uD_iyK0,
* @since 2006-2-2 [?^,,.Dd
* @version 1.0 hIE$ut +
*/ >T=($:n
public class ImprovedMergeSort implements SortUtil.Sort { @h$cHZ
JdF;*`_7*
private static final int THRESHOLD = 10; 8i;EpAwB
z1K@AaRx
/* h,"K+$
* (non-Javadoc) CNwIM6t
* ( $A0b
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) E0[ec6^qwY
*/ @lRTp
public void sort(int[] data) { /I(IT=kp
int[] temp=new int[data.length]; LB1LQ0M
mergeSort(data,temp,0,data.length-1); PRg^E4
} ]c4?-Vq%u
3 -Nwg9U
private void mergeSort(int[] data, int[] temp, int l, int r) { ihS;q6ln
int i, j, k; V.?N29CA|
int mid = (l + r) / 2; ?RNm8,M
if (l == r) rl"$6{Z}
return; t"4RGO)jh
if ((mid - l) >= THRESHOLD) d e)7_pCF|
mergeSort(data, temp, l, mid); 46OYOa
else Q8OA{EUtq
insertSort(data, l, mid - l + 1); PT4Wox9U
if ((r - mid) > THRESHOLD) E{'{fo!#)
mergeSort(data, temp, mid + 1, r); Y">m g=B
else 5n{J}0C
insertSort(data, mid + 1, r - mid); $R6iG\V5
Q$u&/g3NvL
for (i = l; i <= mid; i++) { 1$mxMXNsJ
temp = data; $=3&qg"!
} <?yf<G'$
for (j = 1; j <= r - mid; j++) { B /q/6Pp
temp[r - j + 1] = data[j + mid]; wiHGTaR
} =A[:]),v
int a = temp[l]; q=Xda0c
int b = temp[r]; ?'SHt9b3|
for (i = l, j = r, k = l; k <= r; k++) { b/;!yOF
if (a < b) { uzG{jc^
data[k] = temp[i++]; max 5s$@
a = temp; k%2woHSu&
} else { IDCuS
data[k] = temp[j--]; *WTmS2?'h
b = temp[j]; v|~&I%S7
} bT93R8yp
} p=13tQS<
} y-C=_v_X
gbf2ty
/** 3X|7 R
* @param data (S<Z@y+d
* @param l 10.u
* @param i itotn!Wb`
*/ {9mXJu$cc
private void insertSort(int[] data, int start, int len) { "&9L
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); ={'*C7K)oK
} Lvco9 Ak
} 0 $Ygt0d
} *aem5E`c
} v$n J$M&k
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堆排序： X1wlOE
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package org.rut.util.algorithm.support; J)kH$!csi
#k}x} rn<'
import org.rut.util.algorithm.SortUtil; $nf5bo/;
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/** UYw_k\
* @author treeroot l(Y U9dp
* @since 2006-2-2 nO;*Peob
* @version 1.0 C4,;l^?=%
*/ . W7ZpV
public class HeapSort implements SortUtil.Sort{ lhk=yVG3
*- S/{ .&
/* (non-Javadoc) \Ei(HmEU
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Sh@en\m=#S
*/ &7 0o4~Fr
public void sort(int[] data) { 3AQu\4+A
MaxHeap h=new MaxHeap(); j Z6]G{
h.init(data); $T#yxx
for(int i=0;i h.remove(); NP+*L|-;
System.arraycopy(h.queue,1,data,0,data.length); 7RpAsLH=
} s3Wjg
:6T8\W
private static class MaxHeap{ arQEi
(>)f#t[9J
void init(int[] data){ bdxmJ9a:R
this.queue=new int[data.length+1]; fR^aFT
for(int i=0;i queue[++size]=data; <T^:`p/]4
fixUp(size); P}2waJe
} 2a,l;o$2&
} $~G=Hcl9
_T^+BUw
private int size=0; }#bX{?f
+`(,1L1
private int[] queue; {K,KIj"
Vi:<W0:
public int get() { 6xC$R q
return queue[1]; zZh\e,*
} OS{j5o
USrBi[_ci\
public void remove() { }i\U,mH0_&
SortUtil.swap(queue,1,size--); 4UV6'X)V
fixDown(1); 7[/1uI9U8K
} m Bc2x8g)
file://fixdown 9FKowF_8
private void fixDown(int k) { +<TnE+>j
int j; Dpf"H
while ((j = k << 1) <= size) { nyRQ/.3
if (j < size %26amp;%26amp; queue[j] j++; Osj/={7g
if (queue[k]>queue[j]) file://不用交换 i|/EA7
break; h,Nq:"}
SortUtil.swap(queue,j,k); vi8)U]6
k = j; gQ8FjL6?
} YB?5s`vr9d
} F-&=N {+
private void fixUp(int k) { P)k!#*
while (k > 1) { fEgwQ-]
int j = k >> 1; 4],*y`& g
if (queue[j]>queue[k]) um}%<Cy[
break; Yg<4}l."
SortUtil.swap(queue,j,k); &40# _>W7
k = j; 65g"$:0
} x<lY&KQ0
} 1{0 L~
9`8D Ga
} W_\~CntyZ
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} Q.zE}ZS
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SortUtil： f*HEw
W81dLeTZg
package org.rut.util.algorithm; s ~Xa=_+D
k&dLg5O
import org.rut.util.algorithm.support.BubbleSort; ;+6TZqklQ
import org.rut.util.algorithm.support.HeapSort; ROWrkJI>i
import org.rut.util.algorithm.support.ImprovedMergeSort; L';b908r2
import org.rut.util.algorithm.support.ImprovedQuickSort; O_bgrXg6x
import org.rut.util.algorithm.support.InsertSort; ab/^z0GT
import org.rut.util.algorithm.support.MergeSort; J4VyP["m
import org.rut.util.algorithm.support.QuickSort; )h>H}wDs
import org.rut.util.algorithm.support.SelectionSort; $(A LxC
import org.rut.util.algorithm.support.ShellSort; Lo-\;%y
wSGW_{;-
/** S9@2-Oc
* @author treeroot ?VCM@{9
* @since 2006-2-2 = 3("gScUj
* @version 1.0 \fjr`t]
*/ R&P}\cf8T
public class SortUtil { VQe@H8>3
public final static int INSERT = 1; 8F(Vd99I
public final static int BUBBLE = 2; DM[gjfMXu
public final static int SELECTION = 3; Q(0eq_X|6
public final static int SHELL = 4; l NhX)D^t
public final static int QUICK = 5; %<?U`o@*
public final static int IMPROVED_QUICK = 6; G~$[(Fhk
public final static int MERGE = 7; ,2*x4Gycb
public final static int IMPROVED_MERGE = 8; 1O@y >cV
public final static int HEAP = 9; miv)R
wB0Ke
public static void sort(int[] data) { *v6 j7<H
sort(data, IMPROVED_QUICK); y%NZ(Y,v
} 9@{=2 k
private static String[] name={ @9ndr$t
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" H7&bUt/
}; O\=c&n~`
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private static Sort[] impl=new Sort[]{ _a[)hu8q.
new InsertSort(), sY*iRq
new BubbleSort(), .Km6 (U
new SelectionSort(), \Ng|bWR>LQ
new ShellSort(), *B ]5K{N
new QuickSort(), XI8rU)q
new ImprovedQuickSort(), }p$@.+
new MergeSort(), 1 ^q~NYTK
new ImprovedMergeSort(), #\LsM ~,
new HeapSort() Sru}0M#M
}; ~SD8#;v2
|',$5!:0O
public static String toString(int algorithm){ +\@}IKWl-?
return name[algorithm-1]; 5L%\rH&N
} PY{])z3N
.*acw
public static void sort(int[] data, int algorithm) { )xPfz
impl[algorithm-1].sort(data); rM5{R}+;
} :3$$PdZ
fBZAO
public static interface Sort { NL7CeHs5
public void sort(int[] data); 8IrA{UU
} +PfXc?VU
hantGw|
public static void swap(int[] data, int i, int j) { //W7$DYEG
int temp = data; $CgR~D2G
data = data[j]; kEr;p{5
data[j] = temp; }}4u>1,~
} V\4zK$]
} vD@=V#T