[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; >6+K"J-@
} 3wl>a#f
int i1=l; X+8p2xSO|
int i2=mid+1; /)TEx}wk
for(int cur=l;cur<=r;cur++){ }}1Q<puM
if(i1==mid+1) V}-o):dI|
data[cur]=temp[i2++]; V p{5Kxq
else if(i2>r) Y_sVe
data[cur]=temp[i1++]; s3 $Q_8H
else if(temp[i1] data[cur]=temp[i1++]; R2W_/fsG
else Q$j48,e
data[cur]=temp[i2++]; ;$< ek(i7
} ^ni_%`Ag
} 4N j?UDa
hh&y2#Io
} 5zOSb$;
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改进后的归并排序: qH"a!
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package org.rut.util.algorithm.support; n`xh/vGm#
E2D8s=r
import org.rut.util.algorithm.SortUtil; 6QQ oHYtZ
<vDm(-i3
/** p]=;t"
* @author treeroot w}q"y+=Z:
* @since 2006-2-2 pSFWNWQ'B
* @version 1.0 caht4N{T
*/ GYxI$y0:
public class ImprovedMergeSort implements SortUtil.Sort { =)8fE*[s
l.l~K%P'h
private static final int THRESHOLD = 10; /|AuI qW
e~?]F0/
/* J7o?h9
* (non-Javadoc) wP?q5r5
* |0p'p$%
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) #jiqRhm
*/ yTiqG5r
public void sort(int[] data) { 89mre;v`
int[] temp=new int[data.length]; )n@3@NV
mergeSort(data,temp,0,data.length-1); @un }&URp
} 2"mj=}y6
vy2aNUmt
private void mergeSort(int[] data, int[] temp, int l, int r) { V}+;bbUc-
int i, j, k; Y'1V(5/&
int mid = (l + r) / 2; m28w4
if (l == r) mC(t;{
return; U:hC!t:
if ((mid - l) >= THRESHOLD) HH@xnd
mergeSort(data, temp, l, mid); K9'*q3z
else 8-YrmP2k
insertSort(data, l, mid - l + 1); WEAXqDjM
if ((r - mid) > THRESHOLD) +Ob#3PRy
mergeSort(data, temp, mid + 1, r); );H[lKy
else >nEnX
insertSort(data, mid + 1, r - mid); s;$TX304
;tiUOixJ
for (i = l; i <= mid; i++) { ZH_4'm!^g|
temp = data; :exuTn
} l}c2l'
for (j = 1; j <= r - mid; j++) { mXj Ljgc}
temp[r - j + 1] = data[j + mid]; 5N<v'6&=
} Z"Ni Y
int a = temp[l]; i]%"s_l
int b = temp[r]; olxP`iK
for (i = l, j = r, k = l; k <= r; k++) { S'p`ECfVMA
if (a < b) { KBA%
data[k] = temp[i++]; @A'1D@f#
a = temp; e/jM+%
} else { rd4'y~#S
data[k] = temp[j--]; yt:V+qdv
b = temp[j]; Uy|=A7Ad c
} 1R9?[RE
} -GVG1#5
} /,$\H
PGl-2Cr
/** }/3pC a
* @param data % ul{nL:
* @param l z}&C(m:al
* @param i BM~niW;k
*/ ^T6!z^g1h
private void insertSort(int[] data, int start, int len) { FD+PD:cQn
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); TFDCo_>o
} L b;vrh;A
} wNhR(M7
} rss.F3dK
} 1t=X: ]0j
dU^<7 K:S
堆排序： ATp 6-
4 xzJql
package org.rut.util.algorithm.support; bTp2)a^G
a;(zH*/XK
import org.rut.util.algorithm.SortUtil; JMlhBh
\[I .
/** $=xQX
* @author treeroot b7sE
* @since 2006-2-2 >1I2R/'
* @version 1.0 (ul-J4E\O
*/ %kFELtx
public class HeapSort implements SortUtil.Sort{ 1y-lZ}s_
aW-o=l@;
/* (non-Javadoc) EFt`<qwj
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) <`UG#6z8
*/ C_ZD<UPA\
public void sort(int[] data) { H-KwkH`L4
MaxHeap h=new MaxHeap(); _D,f4.R
h.init(data); ,T*_mDVY
for(int i=0;i h.remove(); VD3MJ8!w
System.arraycopy(h.queue,1,data,0,data.length); %7d@+ .
} 3b\8907
G_N-}J>EP
private static class MaxHeap{ 1za'u_
,xD*^>!
void init(int[] data){ x$J.SbW
this.queue=new int[data.length+1]; *@n3>$
for(int i=0;i queue[++size]=data; iZ6C8HK&&
fixUp(size); s_Oh >y?Aq
} T_tDpq_|
} f"<@6Axq
7h#faOP
private int size=0; 7e{X$'
SA+%c)j29
private int[] queue; J$9xC{L4
AKCfoJ
public int get() { K0RYI69_
return queue[1]; Dq%r !)
} Fxth>O`$
j[J@tM#
public void remove() { ]{2{:`s
SortUtil.swap(queue,1,size--); Q] yT
fixDown(1); 0ij~e<
} X$|TN+Ub
file://fixdown !eAdm
private void fixDown(int k) { )cqDvH
int j; avt>saR
while ((j = k << 1) <= size) { ~{,vg4L
if (j < size %26amp;%26amp; queue[j] j++; <_a70"i
if (queue[k]>queue[j]) file://不用交换 fqk Dk
break; h?3,B0G
SortUtil.swap(queue,j,k); PUjoi@]
k = j; Ie&b<k
} ]pRfY9w
} E?gu(\an@
private void fixUp(int k) { 'W?v.W &
while (k > 1) { VXc+Wm*W
int j = k >> 1; j*La,iF
if (queue[j]>queue[k]) k4F"UG-`
break; IgiF,{KE,
SortUtil.swap(queue,j,k); 1u"*09yZd
k = j; 2~&hstd%
} /q"d`!h)w
} AXh3LA
L740s[,`o#
} 60aKT:KLC_
Q f+p0E;
} }EedHS
lO2T/1iMTW
SortUtil： [71#@^ye
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package org.rut.util.algorithm; X=p3KzzX
1ntkM?
import org.rut.util.algorithm.support.BubbleSort; =2nn "YVP
import org.rut.util.algorithm.support.HeapSort; #mRFUA
import org.rut.util.algorithm.support.ImprovedMergeSort; ,bVS.A'o
import org.rut.util.algorithm.support.ImprovedQuickSort; xjK_zO*dLq
import org.rut.util.algorithm.support.InsertSort; ^#BGA|j
import org.rut.util.algorithm.support.MergeSort; c.8((h/
import org.rut.util.algorithm.support.QuickSort; lsB9;I^+x
import org.rut.util.algorithm.support.SelectionSort; 1] %W\RHxo
import org.rut.util.algorithm.support.ShellSort; /K,|k EE'n
s!hI:$J.
/** lLkmcHu
* @author treeroot ||=[kjG~
* @since 2006-2-2 Wm$`ae
* @version 1.0 2B9i R
*/ ovDJ{3L6O
public class SortUtil { t8DL9RW'
public final static int INSERT = 1; 2]V>J
public final static int BUBBLE = 2; LmXF`Y$
public final static int SELECTION = 3; xMNNXPz(
public final static int SHELL = 4; vcw>v={x
public final static int QUICK = 5; +dCDM1{_a
public final static int IMPROVED_QUICK = 6; xBL$]>
public final static int MERGE = 7; :>P4L,Da]
public final static int IMPROVED_MERGE = 8; 8Q^6ibE
public final static int HEAP = 9; *,W!FxJ
c/<Sa|'
public static void sort(int[] data) { 9|N"@0<B
sort(data, IMPROVED_QUICK); R81{<q'%X
} 5@+4
private static String[] name={ =&q-[JW
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" FJ{,=@
}; v@fe-T&0
O}K_l1
private static Sort[] impl=new Sort[]{ -t@y\vZF,
new InsertSort(), b W=.K>|
new BubbleSort(), 3!.H^v?
new SelectionSort(), ':4}O#
new ShellSort(), +}7Ea:K
new QuickSort(), >bfYy=/
new ImprovedQuickSort(), RIy5ww}3|
new MergeSort(), [lNqT1%]
new ImprovedMergeSort(), PTbA1.B
new HeapSort() Pt6hGSo.
}; EjR_-8@FK
_{LN{iqDv
public static String toString(int algorithm){ yn/?= ?0
return name[algorithm-1]; I*A0?{
} 3Q'[Ee2-3
}W:*aU
public static void sort(int[] data, int algorithm) { HzRX$IKB3(
impl[algorithm-1].sort(data); ?Oy'awf_
} E0"10Qbi
W.,% 0cZ
public static interface Sort { R^J.?>0
public void sort(int[] data); ,4^9cFVo
} Iv$:`7|crX
q&XCX$N
public static void swap(int[] data, int i, int j) { 4M @oj
int temp = data; ]d@^i)2LF
data = data[j]; 4F05(R8k
data[j] = temp; mje<d"bW
} jM5_8nS&d
} E rop9T1