[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; 2n?\tOm(V
} &~pj)\_
int i1=l; IE$x2==)
int i2=mid+1; to[EA6J8l
for(int cur=l;cur<=r;cur++){ jPPaL]
if(i1==mid+1) MVjc.^
data[cur]=temp[i2++]; Vm'ReH
else if(i2>r) >r{3t{
data[cur]=temp[i1++]; M$FXDyr
else if(temp[i1] data[cur]=temp[i1++]; %83PbH
else }zRYT_:
data[cur]=temp[i2++]; H|0B*i@81
} Y((z9-`
} lk \|EG
UL;d H
} KZ ?<&x
6Kh:m-E9
改进后的归并排序: 0MMY{@n
?XsL4HIx
package org.rut.util.algorithm.support; Z{chAg\
si=/=h
import org.rut.util.algorithm.SortUtil; \4K8*`$
b6bmvHD
/** `>?\MWyu
* @author treeroot .}ohnnJB0
* @since 2006-2-2 3Aaj+=]W
* @version 1.0 NTXT0:
*/ WaWT 5|A
public class ImprovedMergeSort implements SortUtil.Sort { { YJ.BWr
zN].W\("\
private static final int THRESHOLD = 10; 6]T02;b>/,
EM vV
/* LAwX9q`
* (non-Javadoc) BRQ9kK20
* PHfGl
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) aC]~
*/ ?P<&8eY
public void sort(int[] data) { rMe`HM@
int[] temp=new int[data.length]; (S5'iksx
mergeSort(data,temp,0,data.length-1); }w8h^(+B
} q*DR~Ov
~W5fJd0
private void mergeSort(int[] data, int[] temp, int l, int r) { IAnY+=^
int i, j, k; U~Ni2|}\C9
int mid = (l + r) / 2; gD=s~DgN)
if (l == r) bT[Q:#GL
return; @)<uQ S
if ((mid - l) >= THRESHOLD) %E1~I\n:F
mergeSort(data, temp, l, mid); z9h`sY~
else 'QeqWn
insertSort(data, l, mid - l + 1); 5y=X?hF~)
if ((r - mid) > THRESHOLD) yu#Jw
mergeSort(data, temp, mid + 1, r); .Yha(5(
else feNr!/
insertSort(data, mid + 1, r - mid); 6 Y&OG>_\
'AeU
for (i = l; i <= mid; i++) { n9bX[+#d
temp = data; ji A$6dZU
} 3WPMS/
for (j = 1; j <= r - mid; j++) { VxjHB?)
temp[r - j + 1] = data[j + mid]; b ";#qVv C
} 8C,?Ai<ro
int a = temp[l]; "kP.Kx!
int b = temp[r]; L2{tof
for (i = l, j = r, k = l; k <= r; k++) { GgA =EdJn
if (a < b) { (4M#(I~cE
data[k] = temp[i++]; JB+pd_>5
a = temp; e{=7,DRH<
} else { T:;e73
data[k] = temp[j--]; J'@I!Jc
b = temp[j]; <+_OgF1G
} B'yN &3
} gQ?>%t]
} r+m8#uR
q n=6>wP
/** VrF]X#\)
* @param data `Yoafa
* @param l bnD>/z]E
* @param i bI]1!bi]i
*/ YLPiK
private void insertSort(int[] data, int start, int len) { H@G7oK
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); O;H/15j:sK
} T]CvfvO5
} @|-ydm0
} ^o,@9GTs
} QREIr |q'
pNQd\nY|0
堆排序： mXhr: e
E8%O+x}
package org.rut.util.algorithm.support; _$cQAH0 E
Z]9 )1&
import org.rut.util.algorithm.SortUtil; Ij=hmTl{P
Cc!n`%qc
/** +BzKO >
* @author treeroot IH>+P]+3"3
* @since 2006-2-2 !vImmhI!I
* @version 1.0 D#(A?oN
*/ mT!~;]RrF
public class HeapSort implements SortUtil.Sort{ F>^k<E?,C
w?Q@"^IL
/* (non-Javadoc) IDLA-Vxo
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) s)]|zu0"Ku
*/ vja^O
public void sort(int[] data) { CZ]+B8Pl(x
MaxHeap h=new MaxHeap(); /3Se*"u
h.init(data); xg3G
for(int i=0;i h.remove(); $#t&W&
System.arraycopy(h.queue,1,data,0,data.length); z2"2Xqy<U
} R?l>Vr
$Q47>/CUc^
private static class MaxHeap{ /8Vh G|Wb
!*CL>}-,
void init(int[] data){ 0CTI=<;
this.queue=new int[data.length+1]; DCwldkdJN
for(int i=0;i queue[++size]=data; VaX>tUW
fixUp(size); c?IIaj!
} c!kbHZ<Z
} i~K~Czmok+
X_%78$N-a`
private int size=0; ;K:.*sAa
Ui?t@.
private int[] queue; 'BUdySng
oxGOn('
public int get() { -Ep-v4}
return queue[1]; ?5/Sa
} 4<lZ;M"
1%1-j
public void remove() { 3FNj~=N
SortUtil.swap(queue,1,size--); OsC1('4@
fixDown(1); 4[Oy3.-c
} `0.5aa
file://fixdown [bGdg
private void fixDown(int k) { Q^mJ_~
int j; hTg%T#m
while ((j = k << 1) <= size) { >@rp]xx
if (j < size %26amp;%26amp; queue[j] j++; 56TUh_
if (queue[k]>queue[j]) file://不用交换 J+z0,N[
break; qPzgGbmD9
SortUtil.swap(queue,j,k); mg#+%v
k = j; 2RM0ca_F
} :SYg)|s
} gVZ~OcB!W
private void fixUp(int k) { NEJ Nu_Z
while (k > 1) { ^-=,q.[7
int j = k >> 1; RQe#X6'h
if (queue[j]>queue[k]) vLkZC
break; a<vCAFQ
SortUtil.swap(queue,j,k); -.z~u/uL
k = j; V$:v~*Y9
} DoImWNLo
} L#NPt4Sz+
YpNTq_S1,
} IClnh1=
ri\r%x
} {},GxrQm
E-!`6
SortUtil： 6oJ~Jdn'
ZEApE+m
package org.rut.util.algorithm; ?[VS0IBS
eb:uh!
import org.rut.util.algorithm.support.BubbleSort; -y$|EOi?
import org.rut.util.algorithm.support.HeapSort; tWc!!Hf2j
import org.rut.util.algorithm.support.ImprovedMergeSort; nq_sbli
import org.rut.util.algorithm.support.ImprovedQuickSort; L{\B9b2
import org.rut.util.algorithm.support.InsertSort; $=H\#e)]Ug
import org.rut.util.algorithm.support.MergeSort; (<3'LhFII
import org.rut.util.algorithm.support.QuickSort; iL5+Uf)E3
import org.rut.util.algorithm.support.SelectionSort; m3,]j\
import org.rut.util.algorithm.support.ShellSort; r[~Km5
vT[%*)`
/** D+"5R5J",
* @author treeroot c()F%e:n
* @since 2006-2-2 gv<9XYByt
* @version 1.0 4}?Yp e-
*/ A u(Ngq
public class SortUtil { !xa,[$w(^
public final static int INSERT = 1; <L5[#V_
public final static int BUBBLE = 2; w3yI;P
public final static int SELECTION = 3; [g<6i.<I
public final static int SHELL = 4; 0~^opNR
public final static int QUICK = 5; [nflQW6
public final static int IMPROVED_QUICK = 6; =zI eZ7
public final static int MERGE = 7; nDaQ1
public final static int IMPROVED_MERGE = 8; "3}Bv X
public final static int HEAP = 9; bCE[oi6hb
!&19%C4
public static void sort(int[] data) { ?b2%\p`"
sort(data, IMPROVED_QUICK); K4l,YR;r
} t;E-9`N
private static String[] name={ Af*^u|#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" u^V`Ucd"R
}; vp-)$f&
Pk*EnA)
private static Sort[] impl=new Sort[]{ 7G2TTa
new InsertSort(), l} h<2
new BubbleSort(), YMJjO0
new SelectionSort(), i mJ{wF
new ShellSort(), mDj:w#q
new QuickSort(), dr:)+R
new ImprovedQuickSort(), V&NOp
new MergeSort(), ^$yr-p%-
new ImprovedMergeSort(), [l'~>
new HeapSort() PsLuyGR.<
}; =;c? 6{<1
SRj|XCd
public static String toString(int algorithm){ | F:?
return name[algorithm-1]; ]36R_Dp
} TQbhK^]
rXfQ_
public static void sort(int[] data, int algorithm) { ywCE2N<-V?
impl[algorithm-1].sort(data); %:((S]vAi
} qb "H&)aHw
SOeL@!_
public static interface Sort { "K~+T\^|k
public void sort(int[] data); iVnrv`k,
} ZYkeW
f@>27&'WV
public static void swap(int[] data, int i, int j) { 8[}MXMRdb
int temp = data; GD.mB[f*
data = data[j]; nvpdu)q<
data[j] = temp; 0nA17^W
} hC5ivJ
} GQ)hZt0