[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; m0P5a%D
} \rJk[Kec
int i1=l; ZjcJYtD
int i2=mid+1; S("bN{7nE
for(int cur=l;cur<=r;cur++){ q=bXHtU
if(i1==mid+1) *8N~Zmz
data[cur]=temp[i2++]; Oe273Y^e
else if(i2>r) "FU|I1Xz
data[cur]=temp[i1++]; E.}Zmr#H
else if(temp[i1] data[cur]=temp[i1++]; $W09nz9?
else *+IUGR
data[cur]=temp[i2++]; WC4Il C
} I/tzo(r
} B}(YD;7vJ
FD*y[A ?
} =k_u5@.Z
K!9=e7|P
改进后的归并排序: m$^7sFD$
mVkn~LD:0
package org.rut.util.algorithm.support; =4I361oMf
b{oNV-<&{
import org.rut.util.algorithm.SortUtil; JB-j@
:$WRV-
/** N_>s2
* @author treeroot Q>rQ/V
* @since 2006-2-2 xv2;h4{<
* @version 1.0 ;V;4#
*/ ?YS`?Rr
public class ImprovedMergeSort implements SortUtil.Sort { J kA~Ol
+bSv-i-
private static final int THRESHOLD = 10; (3-G<E
'G^=>=w|Nv
/* H)p{T@
* (non-Javadoc) \yxr@z1_b
* lG{J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) )#Id2b~
*/ UJZa1p@L
public void sort(int[] data) { h{m]n!
int[] temp=new int[data.length]; pM=vW{"I/
mergeSort(data,temp,0,data.length-1); 2::T,Z
} f`cz@
BoXCc"q[
private void mergeSort(int[] data, int[] temp, int l, int r) { fSTEZH
int i, j, k; nuQ"\ G
int mid = (l + r) / 2; KDhHp^IXQ
if (l == r) M *}$$Fe|
return; =_XcG!"
if ((mid - l) >= THRESHOLD) l}wBthwCc
mergeSort(data, temp, l, mid); e7;]+pN]J
else sJD"u4#y
insertSort(data, l, mid - l + 1); giTlXz3D9
if ((r - mid) > THRESHOLD) ABSeX
mergeSort(data, temp, mid + 1, r); A=])pYE1
else 8RK\B%UW
insertSort(data, mid + 1, r - mid); QdRMp n}q
Y7p#K<y]9
for (i = l; i <= mid; i++) { 0I k@d'7
temp = data; D|S)/o6
} KyDBCCOv
for (j = 1; j <= r - mid; j++) { xs:{%ki
temp[r - j + 1] = data[j + mid]; R0|X;3
} FYj3! H
int a = temp[l]; *be+x RY
int b = temp[r]; ug{F?LW[
for (i = l, j = r, k = l; k <= r; k++) { )uaB^L1
if (a < b) { #Y:/^Q$_qS
data[k] = temp[i++]; ZibODs=f;
a = temp; UX0tI0.tg
} else { *iR`mZb
data[k] = temp[j--]; ]*Hz'
b = temp[j]; 6nDx;x&Q
} pif8/e
} VjnSi
} iN><m|
#K[ @$BY:
/** qq/Cn4fN8
* @param data ?ix,Cu@M
* @param l 8]c`n!u=`
* @param i !6KEW,
*/ }[Y):Yy
private void insertSort(int[] data, int start, int len) { X4TUi8ht!]
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 4e(@b3y
} itvwmI,m\
} rfZA21y{?
} F7hQNQu:
} 0uvL,hF
sPw(+m*C
堆排序： jlB3BwG{w
Ns $PS\
package org.rut.util.algorithm.support; LY>JE6zTt
/t/q$X
import org.rut.util.algorithm.SortUtil; E,X,RM~ +D
p-}:7CXP
/** 4S=lO?\"A
* @author treeroot #Z.JOwi
* @since 2006-2-2 RS1oPY
* @version 1.0 =f["M=)ZJ
*/ J0oR]eT}
public class HeapSort implements SortUtil.Sort{ ^"f
f]lDJ?+ M
/* (non-Javadoc) i6-K!
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) cnsGP*w
*/ w"e2}iE7
public void sort(int[] data) { Xnh1pwDhe<
MaxHeap h=new MaxHeap(); W)_B(;$]
h.init(data); Z`%;bP:
for(int i=0;i h.remove(); Y}6)jzBV
System.arraycopy(h.queue,1,data,0,data.length); UvI!e4_
} pI!55w|
)ad-s
private static class MaxHeap{ :b=0_<G
bcZonS
void init(int[] data){ IIPf5 Z}A
this.queue=new int[data.length+1]; pxF!<nN1,
for(int i=0;i queue[++size]=data; -K!-a'J
fixUp(size); vuAjAeKm
} e,BJD>N ?
} G pd:k
;CW$/^QNr5
private int size=0; )Ga6O2:
M]'AA Uo8
private int[] queue; o i?ak
M~6I-HexT|
public int get() { WIghP5%W
return queue[1]; NWvxbv
} 2V]2jxOQ
W1s|7
public void remove() { s,RS}ek~|
SortUtil.swap(queue,1,size--); 3:gk:j#
fixDown(1); 4D13K.h`O
} Px8E~X<@
file://fixdown BCbW;w8aI
private void fixDown(int k) { /[s$A?
int j; u"%fz8v
while ((j = k << 1) <= size) { )\(pDn$W
if (j < size %26amp;%26amp; queue[j] j++; G$j8I~E@
if (queue[k]>queue[j]) file://不用交换 kr?|>6?
break; A3n"zxU
SortUtil.swap(queue,j,k); -'(:Sq,4o
k = j; (}:xs,Ax
} GZ={G2@=I
} ZKvh]
private void fixUp(int k) { #cs!`Ngb+
while (k > 1) { N_<n$3P\?f
int j = k >> 1; >O _
if (queue[j]>queue[k]) X]!@xlwF\
break; 8vo} .JIl
SortUtil.swap(queue,j,k); erqB/C
k = j; m";gD[m
} !S:@x.n@iR
} IFY!3^;zO
K"1J1>CHQ
} kD>vQ?
UQFuEI<1-
} @oEDtN
mAzW'Q4D
SortUtil： d(!N$B\[5T
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package org.rut.util.algorithm; eG v"&kr
zN1;v6;
import org.rut.util.algorithm.support.BubbleSort; ,b4&$W].
import org.rut.util.algorithm.support.HeapSort; 3Z0\I\E
import org.rut.util.algorithm.support.ImprovedMergeSort; xpM~*Gpm
import org.rut.util.algorithm.support.ImprovedQuickSort; )N<!3yOz
import org.rut.util.algorithm.support.InsertSort; >U)O@W)
import org.rut.util.algorithm.support.MergeSort; J[l K
import org.rut.util.algorithm.support.QuickSort; N;HvB:c
import org.rut.util.algorithm.support.SelectionSort; Ce:ds%
import org.rut.util.algorithm.support.ShellSort; <Va>5R_d<
gUp0RPs
/** `Nn?G
* @author treeroot gm DC,"Y<
* @since 2006-2-2 J^:~#`8
* @version 1.0 d%hA~E1rR
*/ m5Kx}H~
public class SortUtil { Mx"tUoU6z
public final static int INSERT = 1; MF`'r#@:wa
public final static int BUBBLE = 2; yKJ^hv"#
public final static int SELECTION = 3; YLGLr@:q
public final static int SHELL = 4; Q)>'fZ)
public final static int QUICK = 5; EMG*8HRI>r
public final static int IMPROVED_QUICK = 6; ;j=1 oW
public final static int MERGE = 7; -+>am?
public final static int IMPROVED_MERGE = 8; ui1m+
public final static int HEAP = 9; RHbwq]
w.f[)
public static void sort(int[] data) { 9YABr> ?
sort(data, IMPROVED_QUICK); \4k*Zk
} wNZ7(W.U
private static String[] name={ i"xDQ$0G6
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" %a `dOEO
}; k:Q<Uanc[
3:Wr)>l}#
private static Sort[] impl=new Sort[]{ ;^]A@WN6_
new InsertSort(), j`B{w
new BubbleSort(), PvwIO_W
new SelectionSort(), Kdm5O@tq
new ShellSort(), &u-Bu;G.e
new QuickSort(), k 9rnT)YU
new ImprovedQuickSort(), $nn5;11@gY
new MergeSort(), D,a%Je-r,
new ImprovedMergeSort(), IJ;*N
new HeapSort() =Qrz|$_rv
}; OB22P%
?sYjFiE
public static String toString(int algorithm){ ub5hX{uT
return name[algorithm-1]; Hea<!zPH
} hT"K}d;X
E6M: ^p*<
public static void sort(int[] data, int algorithm) { _ GSw\r
impl[algorithm-1].sort(data); N/BU%c ph+
} gN~y6c:N
H%]ch6C
public static interface Sort { N&=2 /
public void sort(int[] data); |U $-d^ZJ
} tpONSRY
<>s\tJ
public static void swap(int[] data, int i, int j) { /MH@>C _
int temp = data; '.,.F0{x
data = data[j]; xQap44KPZ
data[j] = temp; u2-7vudh
} 0h4}RmS
} ^<0NIu}