[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; LpJ\OI*v
} &F[/@
int i1=l; Y:]~~-f\~
int i2=mid+1; T{bM/?g
for(int cur=l;cur<=r;cur++){ >fI<g8N D
if(i1==mid+1) C<2vuZD
data[cur]=temp[i2++]; pzezN
else if(i2>r) 7am._K
data[cur]=temp[i1++]; 4s~YqP{K
else if(temp[i1] data[cur]=temp[i1++]; s2iR }<
else 1b E$x^P
data[cur]=temp[i2++]; kg7oH.0E
} 49~5U+x;
} ~N;.hU%l
I 6a{'c(P
} Ec[=~>;n{l
j/{F#auI
改进后的归并排序: T.GY
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package org.rut.util.algorithm.support; \i}n1Qd
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import org.rut.util.algorithm.SortUtil; Z,qo jtw
lz EF^6I
/** *Eu ca~%=
* @author treeroot g}@_ @
* @since 2006-2-2 Axhe9!Fm
* @version 1.0 ~K 8eRT
*/ o8BbSZVu
public class ImprovedMergeSort implements SortUtil.Sort { Lg[*P8wE
abuHu'73
private static final int THRESHOLD = 10; [Oe$E5qv)]
AtYe\_9$C
/* ,Ww)>O+
* (non-Javadoc) SJ^.#^)
* THWT\3~,
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) t=NPo+fm
*/ 9}iEEI
public void sort(int[] data) { uJA8PfbD
int[] temp=new int[data.length]; G/J5aj[
mergeSort(data,temp,0,data.length-1); BhLYLlXPY
} F(^vD_G
DbP!wU lqR
private void mergeSort(int[] data, int[] temp, int l, int r) { *oL?R2#7
int i, j, k; {3lsDU4
int mid = (l + r) / 2; 9e^[5D=L
if (l == r) IUAx*R
return; j1*'yvGM
if ((mid - l) >= THRESHOLD) ]C3{ _?=
mergeSort(data, temp, l, mid); >y"W(
else tm@&f
insertSort(data, l, mid - l + 1); q6f+tdg=
if ((r - mid) > THRESHOLD) M9HM:
mergeSort(data, temp, mid + 1, r); lPSyFb"
else B/:q
insertSort(data, mid + 1, r - mid); 9Iq[@v
EeG7 %S 5(
for (i = l; i <= mid; i++) { 6!bVPIyYO
temp = data; x5YW6R.<t
} E?z3 D*U
for (j = 1; j <= r - mid; j++) { 6x)7=_:0
temp[r - j + 1] = data[j + mid]; [5e}A&
} !'wh hi
int a = temp[l]; a$yAF4HR<
int b = temp[r]; Hdw;=]-
for (i = l, j = r, k = l; k <= r; k++) { ^.p({6H
if (a < b) { +w[vYKSZm
data[k] = temp[i++]; u n\!K
a = temp; :f G5?])
} else { ExeD3Zj
data[k] = temp[j--]; /W1!mih
b = temp[j]; _VGAh:v
} d00#;R
} =e](eA;
} u,AP$+Qk
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/** _v bCC7Bf8
* @param data C-E~z{
* @param l r&oR|-2hRk
* @param i 4l7TrCB
*/ -0r0M)
private void insertSort(int[] data, int start, int len) { Yz]c'M@
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); v_mk{
} 4&X D
} |a4cER.'2^
} /4/'&tY
} G%^jgr)
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堆排序： vz5x{W
s|F}Abx,^
package org.rut.util.algorithm.support; SW5V:|/
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import org.rut.util.algorithm.SortUtil; 01=nS?
Q2yD4>qy
/** H3-(.l[!b)
* @author treeroot ,1/O2aQ%\0
* @since 2006-2-2 scX'>\w&c
* @version 1.0 %O6r
*/ cq]JD6937
public class HeapSort implements SortUtil.Sort{ T5nBvSVv'
6_|iXs(&
/* (non-Javadoc) =mR~\R( I
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Hb}O/G$a*
*/ i(T[
public void sort(int[] data) { ;)~}/nR<a
MaxHeap h=new MaxHeap(); r$[`A_
h.init(data); }uZ/^_U.
for(int i=0;i h.remove(); |w5m2Z
System.arraycopy(h.queue,1,data,0,data.length); !/nXEjW?
} 0JFS%Yjw[
P:D;w2'Q
private static class MaxHeap{ H9;0$Y(e-
b@QCdi,u
void init(int[] data){ srPczVG*
this.queue=new int[data.length+1]; }1fi#
for(int i=0;i queue[++size]=data; dG&^M".(
fixUp(size); 8[b_E5!V
} +*RaX (&
} Emy=q5ryl
Az7 ]qb
private int size=0; [)+wke9
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private int[] queue; IG+g7kDCY
K;z$~;F
public int get() { dx@|M{jz'
return queue[1]; L4DT*(;!E
} !"2S'oQKS
0=0,ix7?#
public void remove() { BLN|QaZ
SortUtil.swap(queue,1,size--); :KmnwYm
fixDown(1); X[<%T}s#
} 1=Z!ZY}}e
file://fixdown _aeIK
private void fixDown(int k) { 3CzF@t;5
int j; Xh}S_/9}5
while ((j = k << 1) <= size) { ;6eBfMhL
if (j < size %26amp;%26amp; queue[j] j++; HYg! <y
if (queue[k]>queue[j]) file://不用交换 _ amP:h
break; d^=9YRc
SortUtil.swap(queue,j,k); 8.,d`~
k = j; cJMi`PQ;
} V408uy-M
} 6hMKAk
private void fixUp(int k) { 3eg6 CdT
while (k > 1) { @R-11wP)M
int j = k >> 1; dz?On\66
if (queue[j]>queue[k]) X n8&&w"
break; ,<N{Y[n]e
SortUtil.swap(queue,j,k); <UF0Xc&X'
k = j; 'W,*mfB
} o$eo\X?J?
} M^*\$K%
X%)~i[_DV
} qu1+.z=|
,z<1:st]<
} eF]8Ar1
HKr}"`I.
SortUtil： [UXN= 76N
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package org.rut.util.algorithm; ,-hbwd~M
)Gavjj&uJ
import org.rut.util.algorithm.support.BubbleSort; D Qz+t
import org.rut.util.algorithm.support.HeapSort; _1Q6FI5iR
import org.rut.util.algorithm.support.ImprovedMergeSort; ~4pP( JP
import org.rut.util.algorithm.support.ImprovedQuickSort; ;>>n#8`
import org.rut.util.algorithm.support.InsertSort; Cdy,8*
import org.rut.util.algorithm.support.MergeSort; }toe'6
import org.rut.util.algorithm.support.QuickSort; 51JB,}dGH}
import org.rut.util.algorithm.support.SelectionSort; !ej]'>V,X
import org.rut.util.algorithm.support.ShellSort; S2DG=hi`GK
pU9.#O
/** e'>q( B
* @author treeroot %YK xdp
* @since 2006-2-2 s;YbZ*oaMe
* @version 1.0 ;@T0wd_i|
*/ &&m3E=K!^
public class SortUtil { %59uR}\
public final static int INSERT = 1; `vMhrn
public final static int BUBBLE = 2; F|{uA/P{
public final static int SELECTION = 3; `<yQ`Y_X
public final static int SHELL = 4; =/_uk{
public final static int QUICK = 5; 9Q^cE\j
public final static int IMPROVED_QUICK = 6; ,[IDC3.4^R
public final static int MERGE = 7; &oMWs]0
public final static int IMPROVED_MERGE = 8; Q&N#q53
public final static int HEAP = 9; t))MZw&@
}dop]{RG
public static void sort(int[] data) { xI1{Wo*2C}
sort(data, IMPROVED_QUICK); GLyPgZ`|
} MW6z&+Z
private static String[] name={ |mE;HvQF
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" &}[P{53sr
}; Vn4wk>b}$2
Go)g}#.&
private static Sort[] impl=new Sort[]{ >9rZVNMU
new InsertSort(), C=V2Y_j
new BubbleSort(), i? ~-%
new SelectionSort(), fCx(
new ShellSort(), jtlRom}
new QuickSort(), <BED&j!qvP
new ImprovedQuickSort(), Cp(2]Eb
new MergeSort(), g/JF(nkP
new ImprovedMergeSort(), jZzTnmm&?
new HeapSort() !CWe1Dm
}; .Zczya
z'"7zLQ
public static String toString(int algorithm){ #M16qOEw
return name[algorithm-1]; bO2?DszT5
} 3{$7tck,
u*G<?
public static void sort(int[] data, int algorithm) { lP3|h*
impl[algorithm-1].sort(data); B6Kl_~gT
} 9Q%lS
X}v*"`@Q
public static interface Sort { -3R:~z^L
public void sort(int[] data); ? +L,
} m+hI3@j
X`KSj N&(
public static void swap(int[] data, int i, int j) { P[WkW#
int temp = data; );h(D!D,
data = data[j]; >MHlrSH2
data[j] = temp; PlGif)
} ?b,>+v-w::
} &.,K@OFE}