[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; X{xBYZv4
} #%0Bx3uM
int i1=l; KLWn?`
int i2=mid+1; }_9,w;M$
for(int cur=l;cur<=r;cur++){ "R>FqX6FB
if(i1==mid+1) =q7Z qP
data[cur]=temp[i2++]; j=RRfFg)
else if(i2>r) o\b-_E5"?
data[cur]=temp[i1++]; {i0SS
else if(temp[i1] data[cur]=temp[i1++]; ]:M0Kj&h
else H,unpZ(
data[cur]=temp[i2++]; I#F!N6;
} nI.x
} :Qt
8,P- 7^
} ElhRF{R
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改进后的归并排序: {76c%<`WaP
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package org.rut.util.algorithm.support; #DU26nCL
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import org.rut.util.algorithm.SortUtil; soA|wk\A
)Z 9E=%
/** 8Me:Yp_Xt
* @author treeroot [epi#]m
* @since 2006-2-2 *a;@*
* @version 1.0 U1_@F$mq<
*/ P262Q&.}d
public class ImprovedMergeSort implements SortUtil.Sort { H,fZ!8(A_)
v{zMO:3
private static final int THRESHOLD = 10; }/tf>?c
X|f7K
/* ]V l]XT$Um
* (non-Javadoc) e}/Lk5q!
* &s Pq<lo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) Z>c3
*/ gxz-R?.
public void sort(int[] data) { m7a#qs;,
int[] temp=new int[data.length]; h,aAw#NE*
mergeSort(data,temp,0,data.length-1); ryF7
} O/AaYA&
3$.deYa$R
private void mergeSort(int[] data, int[] temp, int l, int r) { {vUN+We
int i, j, k; &,A64y
int mid = (l + r) / 2; &qpr*17T
if (l == r) 1tTgP+
return; (~CLn;'
if ((mid - l) >= THRESHOLD) Nkxmm/Z
mergeSort(data, temp, l, mid); 0"2=n.##
else @SZM82qU2z
insertSort(data, l, mid - l + 1); {^(ACS9mL
if ((r - mid) > THRESHOLD) ?0? R
mergeSort(data, temp, mid + 1, r); Q_* "SRz
else S5~VD?O,
insertSort(data, mid + 1, r - mid); -p3Re9
Bjk]ZU0T
for (i = l; i <= mid; i++) { A+6 n#
temp = data; \drqG&wl
} (py]LBZ
for (j = 1; j <= r - mid; j++) { w0w G-R ?
temp[r - j + 1] = data[j + mid]; Bm&kkx.9P
} \fA{1
int a = temp[l]; *Qugv^-
int b = temp[r]; ~U;rw&'H
for (i = l, j = r, k = l; k <= r; k++) { S*j6OwZ
if (a < b) { IDnC<MO>
data[k] = temp[i++]; 'smWLz}
a = temp; 8} =JKR^cK
} else { nF6q7
data[k] = temp[j--]; PH"n{lW.T
b = temp[j]; 5>BK%`
} >2bKSh
} PV|uPuz
} ^Ge+~o?x
j'9"cE5_
/** :'#TCDlOb
* @param data TXe$<4"
* @param l XsnF~)YW
* @param i LPMU8Er
*/ J[f;Xlh
private void insertSort(int[] data, int start, int len) { :0s]U_h
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); x|yEtO&
} .e=C{
} A.hd Kl
} 1V8-^
} {?'fyEeg
h/~n\0,J/
堆排序： N[kwO1
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package org.rut.util.algorithm.support; 3p0LN'q]A
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import org.rut.util.algorithm.SortUtil; J,Ks0MA
_YcA+3ZL
/** f=)2f=
* @author treeroot (SKVuR%Jj
* @since 2006-2-2 aN"DkUYZM
* @version 1.0 /yM:|`tT
*/ m1Y>Nj[f
public class HeapSort implements SortUtil.Sort{ ~gGZmTb
4:U?u
/* (non-Javadoc) BJ% eZ.
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) ! u:Weoz
*/ qUly\b 47
public void sort(int[] data) { e^.Fa59
MaxHeap h=new MaxHeap(); oWYmj=D~2z
h.init(data); a'z)
for(int i=0;i h.remove(); +nJUFc
System.arraycopy(h.queue,1,data,0,data.length); lo[.&GD
} foQ#a
)_U<7"~0l
private static class MaxHeap{ >nzdnF_&zW
,yd?gP-O
void init(int[] data){ E9~Ghx.
this.queue=new int[data.length+1]; 33!oS&L
for(int i=0;i queue[++size]=data; o7|eMe?<t
fixUp(size); ]xuG&O"SBV
} trAkcYd
} <:?r:fQX
OF\rgz
private int size=0; L'u\w
2Lx3=[ik
private int[] queue; =jN*P?
}Hn/I,/
public int get() { k{'0[,mx#
return queue[1]; Yb E-6|cz
} EW3(cQbK
0:+WO%z
public void remove() { y-1 pR
SortUtil.swap(queue,1,size--); j$+nKc$
fixDown(1); TA{\PKA)
} g1jTy7g?
file://fixdown 5H ue7'LS
private void fixDown(int k) { 8 XU1/i7N
int j; 1Z9qjV%^
while ((j = k << 1) <= size) { >yULC|'F&~
if (j < size %26amp;%26amp; queue[j] j++; 3`k;a1Z#O'
if (queue[k]>queue[j]) file://不用交换 {~F4WjHJp
break; B[KJR?>
SortUtil.swap(queue,j,k); aoXb22]{
k = j; B'fb^n<
} l,kUhZ@W
} #FNcF>3>
private void fixUp(int k) { 3g >B"t
while (k > 1) { a[ex[TRKe
int j = k >> 1; ,G2TVjz
if (queue[j]>queue[k]) 2sJ(awN>
break; 92 [;Y
SortUtil.swap(queue,j,k); 3\B>lKhQ
k = j; 2RX!V@z.G
} Z4lO?S5%J
} OVV]x{
ll C#1
} :53)Nv
_]Zs,Hy
} q#s,-uu
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SortUtil： R=|{n'n$0|
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package org.rut.util.algorithm; !1ED~3/X
Z /9>
import org.rut.util.algorithm.support.BubbleSort; CO`_^7o9(
import org.rut.util.algorithm.support.HeapSort; hC\6- 0u
import org.rut.util.algorithm.support.ImprovedMergeSort; 49vcoHlf
import org.rut.util.algorithm.support.ImprovedQuickSort; Qc pm!
import org.rut.util.algorithm.support.InsertSort; R;j!}D!4
import org.rut.util.algorithm.support.MergeSort; :AE&Ny4
import org.rut.util.algorithm.support.QuickSort; <>8WQn,K
import org.rut.util.algorithm.support.SelectionSort; c`o7d)_Ke
import org.rut.util.algorithm.support.ShellSort; }b-g*dn]5
QnJZr:4b
/** 2K3{hxB
* @author treeroot s{$(*_
* @since 2006-2-2 D ^x-^6^
* @version 1.0 w/kt3Lw
*/ I= &stsH
public class SortUtil { 6*3.SGUY
public final static int INSERT = 1; RS^lKJ1 U
public final static int BUBBLE = 2; L>3x9
public final static int SELECTION = 3; hy`?E6=9+
public final static int SHELL = 4; gy_>`16K
public final static int QUICK = 5; /\hzb/
public final static int IMPROVED_QUICK = 6; HbxL:~:}J
public final static int MERGE = 7; |g//g\dd
public final static int IMPROVED_MERGE = 8; |y2w9n0D
public final static int HEAP = 9; k@'#@ t
sPR1?:0:
public static void sort(int[] data) { MP>dW nl
sort(data, IMPROVED_QUICK); `-p:vq`
} OEkN(wF
private static String[] name={ LS917ci-
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" wf:OK[r9
}; -&-Ma,M?
+>r/0b
private static Sort[] impl=new Sort[]{ c\Q7"!e
new InsertSort(), nuw70*ell
new BubbleSort(), W#hj 1
new SelectionSort(), =,UWX3`f
new ShellSort(), Ac<Phy-J
new QuickSort(), LL3#5AA"k|
new ImprovedQuickSort(), "*Tb" 'O
new MergeSort(), vuoQz\
new ImprovedMergeSort(), {\:{[{qF
new HeapSort() 6,0_)O}\b
}; 5Er2}KZJv,
*^:N.&]
public static String toString(int algorithm){ E6pMT^{K
return name[algorithm-1]; 9T*v9d
} (G[ *|6m
%|^fi8!:|
public static void sort(int[] data, int algorithm) { %'X[^W
impl[algorithm-1].sort(data); D"a~#^
} |v({-*7
/!3@]xz*
public static interface Sort { PEW=@xj2y
public void sort(int[] data); 'LE=6{#
} }n4V|f-
LILQ\I<<'
public static void swap(int[] data, int i, int j) { 3GUZ;jdn
int temp = data; 3U7*>H
data = data[j]; T>NDSami
data[j] = temp; j4^97
} .8by"?**
} *tK\R&4,4s