[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; g^z5fFLg/8
} :n+y/6*
int i1=l; B15O,sL&W
int i2=mid+1; @7Rt4}g
for(int cur=l;cur<=r;cur++){ ?+ -/';
if(i1==mid+1) FI`nRFq)C
data[cur]=temp[i2++]; (pE\nuA\
else if(i2>r) T+K` ^xv_L
data[cur]=temp[i1++]; %;<k(5bhGJ
else if(temp[i1] data[cur]=temp[i1++]; J\xz^%p
else Th~3mf #
data[cur]=temp[i2++]; -Ap2NpZ"t
} 1=/doo{^
} #Z|%0r_~
!Bk[p/\
} V`g\ja*Y
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改进后的归并排序: FtFv<UV
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package org.rut.util.algorithm.support; iJ`%yg,
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import org.rut.util.algorithm.SortUtil; I 9{40_
*`+<x
/** ;!l*7}5X=
* @author treeroot #gX%X~w$F
* @since 2006-2-2 3R<ME c
* @version 1.0 A*\o c
*/ tA! M
public class ImprovedMergeSort implements SortUtil.Sort { 79{.O`v
MPKpS3VS
private static final int THRESHOLD = 10; j}rgOz.
XlPK3^'N)h
/* <pTQpU
* (non-Javadoc) `7QvwXsH]
* ~^lH ^J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) MtpU~c
*/ MiSja#"+A
public void sort(int[] data) { "ibK1}-
int[] temp=new int[data.length]; lL:KaQ0E
mergeSort(data,temp,0,data.length-1); A~6%,q@^jh
} 6[+\CS7Lt
>W`S(a Mn
private void mergeSort(int[] data, int[] temp, int l, int r) { ( oQ'4,F
int i, j, k; '[>\N4WD
int mid = (l + r) / 2; 0kU3my]
if (l == r) o,S!RG&
return; !dfS|BA]
if ((mid - l) >= THRESHOLD) /*u#Ba<<
mergeSort(data, temp, l, mid); J6)efX)j-p
else C6K|:IK{
insertSort(data, l, mid - l + 1); Smqr q
if ((r - mid) > THRESHOLD) Ci]'G>F@"
mergeSort(data, temp, mid + 1, r); tMxsR>sH
else Q3'fz 9v
insertSort(data, mid + 1, r - mid); 0hrCG3k.91
0V<Aub[${
for (i = l; i <= mid; i++) { x r-;,W
temp = data; Z"6 2#VM
} z$9@j2
for (j = 1; j <= r - mid; j++) { t[]['Iosd
temp[r - j + 1] = data[j + mid]; `Mg8]H~
} cJxW;WI!,
int a = temp[l]; d{QMST2&
int b = temp[r]; 6uu^A9x
for (i = l, j = r, k = l; k <= r; k++) { ^y&q5p jj
if (a < b) { ;\<""Yj@l
data[k] = temp[i++]; \p5|}<Sr)
a = temp; zb"rMzCH
} else { SQh+5
data[k] = temp[j--]; :d;[DYFLxb
b = temp[j]; 69t7=r
} F;IP3tD
} ,9=gVW{
} >%9^%p^
J?._/RL8-
/** qq OxTG]
* @param data fA"<MslKLK
* @param l \bU`
* @param i Qo'yS"g<9)
*/ ! G*&4V3Mg
private void insertSort(int[] data, int start, int len) { 1S+;ZMk
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); >F/XZC
} f"vk# 3
} v2Dt3$@H6
} uzHT.iBn
} YSqv86
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堆排序： [dl+:P:zc
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package org.rut.util.algorithm.support; i~9?:plS
}P#Vsqe V
import org.rut.util.algorithm.SortUtil; J4YT)-
qOW#Q:T
/** t:\l&R&
* @author treeroot ~V @;(_T
* @since 2006-2-2 X6Un;UL
* @version 1.0 p`d XqW
*/ 2Oyy`k
public class HeapSort implements SortUtil.Sort{ p={Jf}v
`-4'/~G
/* (non-Javadoc) K'x4l,rq
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `q%U{IR
*/ y|^EGnaE
public void sort(int[] data) { 8s<^]sFP
MaxHeap h=new MaxHeap(); 3FFaEl
h.init(data); ovo/!YJ2
for(int i=0;i h.remove(); Y!Drb-U?;
System.arraycopy(h.queue,1,data,0,data.length); o*X]b]
} $50\"mo~z
cC' ~
private static class MaxHeap{ /dLA`=rZx
$K})Q3FNi
void init(int[] data){ d]8_l1O
this.queue=new int[data.length+1]; Q8;#_HE
for(int i=0;i queue[++size]=data; (/&;jV2DD[
fixUp(size); Nu@5 kwH
} G%S6$@:
} /?Vdqci
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private int size=0; cg,Ua!c
y=w`w>%
private int[] queue; (z/jMMms
j?xk&
public int get() { D z@1rc<B
return queue[1]; \SOeTn+
} S`=n&'
$ADPV,*gG
public void remove() { "qawq0P8Z
SortUtil.swap(queue,1,size--); 7Re-5vz R
fixDown(1); BBxc*alG0
} #EJP(wXa
file://fixdown JT04vm4
private void fixDown(int k) { 3E,DipHg
int j; FqwIJ|ct
while ((j = k << 1) <= size) { \ZMP_UU(
if (j < size %26amp;%26amp; queue[j] j++; Z ] '>
if (queue[k]>queue[j]) file://不用交换 Cc!J1)
break; s O=4IBE
SortUtil.swap(queue,j,k); HMV)U{
k = j; :N2E}hxk
} P[FV2R~
} jJia.#.Ze
private void fixUp(int k) { qz`rL#W]
while (k > 1) { ZYa\"zp-
int j = k >> 1; G=|70pxU
if (queue[j]>queue[k]) :k~dj C
break; :=9<
SortUtil.swap(queue,j,k); tw<P)V\h
k = j; +< yhcSSTB
} Wwhgo.Wx
} G6V/SaD
V.8%|-d
} vM(Xip7
3rNc1\a;
} Yl~$V(
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SortUtil： ul@3 Bt
I^G^J M!
package org.rut.util.algorithm; h=6xZuA\
26.)Ur<F
import org.rut.util.algorithm.support.BubbleSort; &tj0M.-
import org.rut.util.algorithm.support.HeapSort; &RW`W)0;
import org.rut.util.algorithm.support.ImprovedMergeSort; j0x5@1`6G
import org.rut.util.algorithm.support.ImprovedQuickSort; ZVL gK}s
import org.rut.util.algorithm.support.InsertSort; >aG=T{
import org.rut.util.algorithm.support.MergeSort; +AoP{x$Ia
import org.rut.util.algorithm.support.QuickSort; U;U08/y
import org.rut.util.algorithm.support.SelectionSort; g*y/j]
import org.rut.util.algorithm.support.ShellSort; z]=8eV\
v L}T~_=3
/** 1`JB)9P
* @author treeroot 3+(z_!Qh
* @since 2006-2-2 ?YBaO,G9o
* @version 1.0 ]g,lRG
*/ J\=a gQ
public class SortUtil { Xwq]f:@V
public final static int INSERT = 1; L^FcS\r;
public final static int BUBBLE = 2; Ie@Jb{x
public final static int SELECTION = 3; !n<o)DsZR
public final static int SHELL = 4; E(4w5=8TI
public final static int QUICK = 5; g1{/ 5{XI
public final static int IMPROVED_QUICK = 6; ?#BV+#(
public final static int MERGE = 7; \|%E%Yc
public final static int IMPROVED_MERGE = 8; OCNPi4
public final static int HEAP = 9; BvK QlT
I9&lO/c0
public static void sort(int[] data) { dJi|D
sort(data, IMPROVED_QUICK); -Sz_mr
} n@ [
private static String[] name={ AnMV <
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" dZ]Rqr _!
}; %dW%o{
|4mVT&63(
private static Sort[] impl=new Sort[]{ c)~h<=)
new InsertSort(), %;|0
new BubbleSort(), h5GU9M
new SelectionSort(), zvO:"w}
new ShellSort(), P:k+ y$
new QuickSort(), <a|@t@R
new ImprovedQuickSort(), 8lP6-VA
new MergeSort(), L:@fP~Erh
new ImprovedMergeSort(), }y6q\#G
new HeapSort() #U ASH&
}; pRi<cO
C6jR=@42Q
public static String toString(int algorithm){ 66\jV6eH7L
return name[algorithm-1]; +Gh7^v|"
} % frfSGf.#
Sh&PNJ-*
public static void sort(int[] data, int algorithm) { g"K>5Cb
impl[algorithm-1].sort(data); 0.Vi97`
} a]B[`^`z
U|5-0u5
public static interface Sort { ,_ .v_
public void sort(int[] data); S3Y2O x
} P@0Y./Ds
|"]PCb)!
public static void swap(int[] data, int i, int j) { I=IjdwbH
int temp = data; wK!~tYxP
data = data[j]; h|)vv4-d|
data[j] = temp; lV6dm=k
} PsnGXcj
} ke%pZ7{u