[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; ]:Ocu--
} )xlNj$(x5n
int i1=l; '+Ts IJh
int i2=mid+1; C&K%Q3V
for(int cur=l;cur<=r;cur++){ rh/3N8[6
if(i1==mid+1) XNd:x{
data[cur]=temp[i2++]; ayHI(4!$j
else if(i2>r) |]Pigi7y-
data[cur]=temp[i1++]; #li;L
else if(temp[i1] data[cur]=temp[i1++]; "EQ}xj
else \D>'
data[cur]=temp[i2++]; V=QvwQlZ
} @N1ta-D#
} j+PW9>Uh
E}.cz\!.
} ;m@>v?zE
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改进后的归并排序: ]oXd|[G
Y-7x**I
package org.rut.util.algorithm.support; Dbz\8gmY
o!wz:|\S
import org.rut.util.algorithm.SortUtil; $1#|<|
nS]/=xP{
/** !V7VM_}@Y
* @author treeroot yEzp+Ky
* @since 2006-2-2 mJ !}!~:
* @version 1.0 A\.k['!
*/ .@/5Ln
public class ImprovedMergeSort implements SortUtil.Sort { kSoAnJ|
.ikFqZ$$
private static final int THRESHOLD = 10; pi3Z)YcT
w~&bpCB!
/* Kx ?}%@b
* (non-Javadoc) ]l}8
* L)HuQVc g
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) L'z;*N3D
*/ 6EP5n
public void sort(int[] data) { qA Jgz7=c
int[] temp=new int[data.length]; =DGaK0n
mergeSort(data,temp,0,data.length-1); ]'DtuT?Z
} 6aXsRhQ~
z2wR]G5!
private void mergeSort(int[] data, int[] temp, int l, int r) { Q^ bG1p//.
int i, j, k; h&;\
int mid = (l + r) / 2; fb&K.6"
if (l == r) ~|R"GloUw
return; o_X"+s
if ((mid - l) >= THRESHOLD) UIIunA9
mergeSort(data, temp, l, mid); V92e#AR
else m9.QGX\]
insertSort(data, l, mid - l + 1); (y=P-nm
if ((r - mid) > THRESHOLD) 6n45]?
mergeSort(data, temp, mid + 1, r); \Vr(P>
else L}lc=\
insertSort(data, mid + 1, r - mid); /N{xFt/?
eWW\m[k]}
for (i = l; i <= mid; i++) { oIQor%z
temp = data; ~Se/uL;*
} e J2wK3R
for (j = 1; j <= r - mid; j++) { ]ZHC*r2i
temp[r - j + 1] = data[j + mid]; x]Nq|XK
} Gk'J'9*
int a = temp[l]; ]C}z3hhk
int b = temp[r]; :X,1KR
for (i = l, j = r, k = l; k <= r; k++) { Xp4pN{he
if (a < b) { rqT@i(i
data[k] = temp[i++]; N}pE{~Y
a = temp; By:A9s
} else { 8&3+=<U
data[k] = temp[j--]; CIYTs,u#
b = temp[j]; ^mkplp a
} y=G
} |!flR? OU
} wNcf7/ky
11%^K=dq
/** $ [M8G
* @param data gMFTZQsP
* @param l mVP@c&1w?
* @param i \ Lrg:
*/ q#c\
private void insertSort(int[] data, int start, int len) { +f;z{)%B
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *-ZJF6
} !H~G_?Mf\O
} 0waQw7 E
} [1G4he%
} DLJu%5F
rP^2MH"
堆排序： Vdh5s292h
&NB[:S=
package org.rut.util.algorithm.support; Ag#p)
:&9#p%/
import org.rut.util.algorithm.SortUtil; N=)N
maXQG&.F
/** Q<wrO
* @author treeroot =uMoX -
* @since 2006-2-2 ;~tKNytD`B
* @version 1.0 dHg[0Br)r
*/ f*p=]]y
public class HeapSort implements SortUtil.Sort{ o%RyE]pw,
7K%Ac
/* (non-Javadoc) B ,e3r
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) AdKv!Ta5b
*/ QEm6#y
public void sort(int[] data) { gdNEMT
MaxHeap h=new MaxHeap(); > ~J&i3
h.init(data); /2~qm/%Q
for(int i=0;i h.remove(); vsRn\Y
System.arraycopy(h.queue,1,data,0,data.length); _~-VH&g0R
} P9SyQbcK
5ju\!Re3X
private static class MaxHeap{ =Pd3SC})6V
rcY[jF
void init(int[] data){ [8l8m6
this.queue=new int[data.length+1]; vRVQ:fw
for(int i=0;i queue[++size]=data; H+;>>|+:~
fixUp(size); A)/_:
} BJB'o
} ?R#-gvX%
R*'rg-d
private int size=0; Go=MG:`
!J3g,p*
private int[] queue; sJw#^l
CM!bD\5
public int get() { ~%bz2Pd%
return queue[1]; E}b" qOV
} 3.xsCcmP
qVx4 t"%L>
public void remove() { 9]xOuCb
SortUtil.swap(queue,1,size--); tF O27z@
fixDown(1); wHEt;rc(
} ![0\m2~iv
file://fixdown OLXG0@
private void fixDown(int k) { r@%-S!$
int j; nulVQOj|
while ((j = k << 1) <= size) { '[I?G6
if (j < size %26amp;%26amp; queue[j] j++; hDSt6O4za
if (queue[k]>queue[j]) file://不用交换 l> W?XH
break; g;UB+Y 247
SortUtil.swap(queue,j,k); %8DU}}Rj
k = j; `!K(P- yB?
} Xt_8=Q
} 9NBFG~)|l[
private void fixUp(int k) { tux/@}I
while (k > 1) { 6:fe.0H9
int j = k >> 1; bd5\Rt
if (queue[j]>queue[k]) >DP9S@W
break; J4;w9[a$
SortUtil.swap(queue,j,k); SRRqIQz
k = j; .-awl1 W
} 9i;%(b{
} N>/!e787OU
%-/[.DYt
} =e$<["
1~zzQ:jAZ
} K7 -AVMY
Fw)#[
SortUtil： 6c$ so
O&RW[ml*3
package org.rut.util.algorithm; *:{s|18Pj
+vIpt{733
import org.rut.util.algorithm.support.BubbleSort; anxgD?<+B
import org.rut.util.algorithm.support.HeapSort; I}q2)@
import org.rut.util.algorithm.support.ImprovedMergeSort; @@-n/9>vs
import org.rut.util.algorithm.support.ImprovedQuickSort; iP]KV.e'/C
import org.rut.util.algorithm.support.InsertSort; - 0R5g3^*/
import org.rut.util.algorithm.support.MergeSort; lA<n}N)j
import org.rut.util.algorithm.support.QuickSort; ;:4&nJ*qG
import org.rut.util.algorithm.support.SelectionSort; NTbmI$(
import org.rut.util.algorithm.support.ShellSort; ]bLI!2Kr
u!hY bCB
/** gFizw:l
* @author treeroot ?#YheML?
* @since 2006-2-2 :PE{2*
* @version 1.0 Qz=F nR
*/ U*!q@g_
public class SortUtil { opU=49b
public final static int INSERT = 1; |r>+\" X
public final static int BUBBLE = 2; 7 XE&[o
public final static int SELECTION = 3; Z-z^0QO
public final static int SHELL = 4; (~q.YJ'
public final static int QUICK = 5; r'/&{?Je/
public final static int IMPROVED_QUICK = 6; /99S<U2ej
public final static int MERGE = 7; YcOPqvQ
public final static int IMPROVED_MERGE = 8; O]3$$uI=QE
public final static int HEAP = 9; EmNJ_xY
=.a}
public static void sort(int[] data) { RtO3!dGT.
sort(data, IMPROVED_QUICK); [ R
} b 5<&hN4g
private static String[] name={ 8eq*q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" l25_J.e
}; U*(/eEtd-
>HNBTc=~t
private static Sort[] impl=new Sort[]{ Ne#FBRu5
new InsertSort(), kl%%b"h'
new BubbleSort(), `@TWZ%f6
new SelectionSort(), d9e_slx
new ShellSort(), Kh&W\\K
new QuickSort(), 'K&^y%~py,
new ImprovedQuickSort(), 7^)8DwAl
new MergeSort(), -<H\VT%98
new ImprovedMergeSort(), bi/ AQ^
new HeapSort() FnxPM`Zx
}; cq+G0F+H
diHK
public static String toString(int algorithm){ |y1O M
return name[algorithm-1]; !ij R
} A0X'|4I
mh#NmW>n
public static void sort(int[] data, int algorithm) { 6Cw+
impl[algorithm-1].sort(data); /5:2g#S4
} PL} Wu=
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public static interface Sort { 6<1 2j7
public void sort(int[] data); 7>.d*?eao\
} 3E9 )~$
`(tVwX4
public static void swap(int[] data, int i, int j) { IR JN
int temp = data; la4 #2>#WZ
data = data[j]; PWciD '!
data[j] = temp; Znr6,[U+q
} I;1W6uD=
} |BGB60}]f