[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; r#XDgZtI
} & zG=
int i1=l; 1Jahu!c?
int i2=mid+1; 8.,PgS
for(int cur=l;cur<=r;cur++){ @:[/uqL
if(i1==mid+1) U0rz 4fxc
data[cur]=temp[i2++]; &^<94l
else if(i2>r) sJr$[?
data[cur]=temp[i1++]; C>+UZ
else if(temp[i1] data[cur]=temp[i1++]; 3!,%;Vz=
else #_E8>;)k
data[cur]=temp[i2++]; x!< C0N>?z
} K)qmJ-Gub
} t~AesHZpk
/nrDU*
} WFkXz*7B
Pwq} ;+
改进后的归并排序: 68y.yX[
eE&F1|8
package org.rut.util.algorithm.support; {?C7BClB
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import org.rut.util.algorithm.SortUtil; `<K#bDU;a
sLTf).xh
/** DgdW.Kj|IL
* @author treeroot .Ybm27Dk
* @since 2006-2-2 )S%mKdOm $
* @version 1.0 t`LH\]6@
*/ u7/M>YJ`T
public class ImprovedMergeSort implements SortUtil.Sort { '.iUv#j4Sh
EgY]U1{
private static final int THRESHOLD = 10; PQfx0n,
v uJ~Lg{
/* :70oO}0m.
* (non-Javadoc) PH]q#/'
* H`y- "L8q
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) `mMD e
*/ [p<L*3<
public void sort(int[] data) { GL/\uq
int[] temp=new int[data.length]; +`[$w<I
mergeSort(data,temp,0,data.length-1); &pCKz[Yf+
} ^WeT3b q
q%JV"9,
private void mergeSort(int[] data, int[] temp, int l, int r) { ]\jhtC=2
int i, j, k; MVdE7P
int mid = (l + r) / 2; 7DI8r|~
if (l == r) E5o0^^
return; P`"dj@1'
if ((mid - l) >= THRESHOLD) 9@h>_1RJz
mergeSort(data, temp, l, mid); G q8/xxt
else ^|8cS0dK]Q
insertSort(data, l, mid - l + 1); A.y$.(
if ((r - mid) > THRESHOLD) _|*j8v3
mergeSort(data, temp, mid + 1, r); rOcfPLJi0
else p*^O8o
insertSort(data, mid + 1, r - mid); 9`b*Y*d
tp1{)|pwY6
for (i = l; i <= mid; i++) { P$!Ht
temp = data; Tv(s?T6f
} W6a2I
for (j = 1; j <= r - mid; j++) { }x%"Oq|2]x
temp[r - j + 1] = data[j + mid]; 5[GX
} ^wX_@?aKtt
int a = temp[l]; r}vrE ^Q
int b = temp[r]; Pd3t~1TaW
for (i = l, j = r, k = l; k <= r; k++) { N8KHNTb-M
if (a < b) { wo*/{KFvh
data[k] = temp[i++]; akNJL\b
a = temp; i3kI{8h
} else { ztTpMj
data[k] = temp[j--]; o&>0 pc
b = temp[j]; KR{kn[2|Q
} ] $%{nj<
} s#d>yx_b
} \O^= Z{3y
bT8BJY%+
/** HkQ2G}<
* @param data p}j{<y
* @param l I&^?,Fyy<
* @param i 5B(|!Xq;I
*/ ;B7>/q;g
private void insertSort(int[] data, int start, int len) { Y(&phv&
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); p>MX}^6
} !D
} 'dx4L }d
} nrZv>r
} ok7DI
V-jo2+Y5=
堆排序： pHWol!
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package org.rut.util.algorithm.support; *{C)o0D
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import org.rut.util.algorithm.SortUtil; <H$CCo
']qC,;2
/** 2)U3/TNe
* @author treeroot jL2f74?1
* @since 2006-2-2 A?_2@6Y^
* @version 1.0 ~>C!l k
*/ EmLPq!C
public class HeapSort implements SortUtil.Sort{ yqoi2J:
~ 9'64
/* (non-Javadoc) UH[ YH;3O
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <q_H 3|
*/ (=p}b:Z
public void sort(int[] data) { *yt/ Dj
MaxHeap h=new MaxHeap(); I{M2nQi
h.init(data); {8t;nsdm!
for(int i=0;i h.remove(); Ue8_Q8q5
System.arraycopy(h.queue,1,data,0,data.length); ; I=z
} E fqa*,k
c>]_,Br~
private static class MaxHeap{ ZkqC1u3
ka]n+"~==\
void init(int[] data){ y{kXd1,
this.queue=new int[data.length+1]; (2%C%#]8
for(int i=0;i queue[++size]=data; zO!`sPP
fixUp(size); A]R"C:o
} BL]^+KnP
} S?D2`b
^%\p; yhL
private int size=0; (s}9N
*A_
private int[] queue; A@`C<O ^
@GGyiK@
public int get() { ~r!jVK>^
return queue[1]; 8o~\L= l
} _msDf2e9
!4 6^}3
public void remove() { :CH'Bt4<
SortUtil.swap(queue,1,size--); {Q4=GrS
fixDown(1); 'o5[:=K
} uD. 0?*_
file://fixdown IMVoNKW-
private void fixDown(int k) { ^\x PF5
int j; gAR];(*
while ((j = k << 1) <= size) { mTcLocx
if (j < size %26amp;%26amp; queue[j] j++; y*zZ }>
if (queue[k]>queue[j]) file://不用交换 <KJ18/
break; iPHMyxT+S
SortUtil.swap(queue,j,k); J_`.w
k = j; OxqP:kM
} b"x:IDW qG
} M`"2;
private void fixUp(int k) { 15SIZ:Q
while (k > 1) { 9N9|hy
int j = k >> 1; /oWB7l&
if (queue[j]>queue[k]) _&yQW&vH#
break; A~h8 >zz*
SortUtil.swap(queue,j,k); C?b Mj[$
k = j; \)r#?qn4z;
} k 9s3@S
} .}j@(D
fDqlN`P@
} \*_qP*vq@
S$V'_
} i++ F&r[
W/J3sAYv
SortUtil： xXLKL6F(\
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package org.rut.util.algorithm; vn|X,1o
;m;wSp
import org.rut.util.algorithm.support.BubbleSort; t-/%|@?D
import org.rut.util.algorithm.support.HeapSort; "zm.jNn
import org.rut.util.algorithm.support.ImprovedMergeSort; <$ '#@jW
import org.rut.util.algorithm.support.ImprovedQuickSort; S,J'Z:spf
import org.rut.util.algorithm.support.InsertSort; .H9!UQ&It
import org.rut.util.algorithm.support.MergeSort; n) `4*d$`
import org.rut.util.algorithm.support.QuickSort; JlGyGr^MD
import org.rut.util.algorithm.support.SelectionSort; hj9bMj
import org.rut.util.algorithm.support.ShellSort; eeuAo&L&
|[xi"E\
/** r?H {Y3,
* @author treeroot ~|?2<g$gYR
* @since 2006-2-2 Vd|/]Zj
* @version 1.0 =(v/pLLK?
*/ -Xx,"[sN\w
public class SortUtil { sd>#Hn
public final static int INSERT = 1; {*tewF)|
public final static int BUBBLE = 2; RU[{!E
public final static int SELECTION = 3; I7]45pF
public final static int SHELL = 4; mVk:[ }l6
public final static int QUICK = 5; JCE364$$"
public final static int IMPROVED_QUICK = 6; ,{YC|uB
public final static int MERGE = 7; P`RM"'Om
public final static int IMPROVED_MERGE = 8; GAPZt4Z2
public final static int HEAP = 9; mo<g'|0
hZ$* sf
public static void sort(int[] data) { l*pCG`@J#
sort(data, IMPROVED_QUICK); US4X CJxB
} oSE'-8(
private static String[] name={ `/Z8mFs Y
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" {T.$xiR
}; A:k`Ykr[
#]n[
private static Sort[] impl=new Sort[]{ TS@EE&Wq
new InsertSort(), NcqE)"yObo
new BubbleSort(), ca$D|3
new SelectionSort(), R?^FO:nM%!
new ShellSort(), uy7)9w
new QuickSort(), V@T G"YF
new ImprovedQuickSort(), 2{ }5WH
new MergeSort(), :Im_=S[0
new ImprovedMergeSort(), c1b@3
new HeapSort() qCIZW
}; OB5(4TY
Cf8(Jk`v|
public static String toString(int algorithm){ )]rGGNF*
return name[algorithm-1]; R%}OZJ_
} Jd/5Kx
MI<hShc\
public static void sort(int[] data, int algorithm) { {hVSVx8ZL
impl[algorithm-1].sort(data); H| IsjCc
} bm(0raugs
@$Z5Ag!
public static interface Sort { 0vDP-qJV-
public void sort(int[] data); ?T?%x(]I
} Xdw%Hw
YjLPW@
public static void swap(int[] data, int i, int j) { ^> ZQ:xs@(
int temp = data; qo4AQ}0 <
data = data[j]; : 8(~{<R
data[j] = temp; o"TEmZUP
} U{{RRK|
} 9OP d'f