[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; U* 4{"
} PbbXi
int i1=l; ,Le&I9*%
int i2=mid+1; -08&&H
for(int cur=l;cur<=r;cur++){ tZdwy>;
if(i1==mid+1) }Q47_]5
data[cur]=temp[i2++]; 3Gc ,I:\
else if(i2>r) [q|?f?Zl
data[cur]=temp[i1++]; -q'xC:m
else if(temp[i1] data[cur]=temp[i1++]; pESB Il
else ERUs0na]
data[cur]=temp[i2++]; muL>g_H
} ox!|)^`$_
} 7(yXsVq
<QYCo1_
} N$N;Sw
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改进后的归并排序: 73&]En
X_vI0YX9
package org.rut.util.algorithm.support; YRg=yVo2
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import org.rut.util.algorithm.SortUtil; y_}K?
:5TXA
/** &:;/]cwj
* @author treeroot u]]5p[|S
* @since 2006-2-2 #g-*n@ 1
* @version 1.0 "j.oR}s9?#
*/ B|w}z1.
public class ImprovedMergeSort implements SortUtil.Sort { tXGcwoOB
!}m8]&
private static final int THRESHOLD = 10; 5Z0x2jV
x6P^IkL:
/* >CA1Ub&ls
* (non-Javadoc) 1x8]&
* z`6KX93
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 2)H|/
*/ yZ6X$I:C
public void sort(int[] data) { I*t}gvUt9
int[] temp=new int[data.length]; VJPPHJ[-
mergeSort(data,temp,0,data.length-1); 3c"{Wu-}
} `Q[$R&\
EH%j$=@X
private void mergeSort(int[] data, int[] temp, int l, int r) { $x<-PN
int i, j, k; \8H"lcj:
int mid = (l + r) / 2; 3KZ h?~B
if (l == r) #-8/|_*
return; eLWzd_ln
if ((mid - l) >= THRESHOLD) z(` kWF1<
mergeSort(data, temp, l, mid); Z r*ytbt
else 6Vo}Uaq4
insertSort(data, l, mid - l + 1); IrK )N
if ((r - mid) > THRESHOLD) ng\S%nA&J
mergeSort(data, temp, mid + 1, r); D-/A>
else ^B>6!
insertSort(data, mid + 1, r - mid); &'j77tqOk
P#]jPW
for (i = l; i <= mid; i++) { m[rJFSpef
temp = data; GH!#"Sl8Z
} r>OE[C69
for (j = 1; j <= r - mid; j++) { ('Pd GV4V
temp[r - j + 1] = data[j + mid]; q1j[eru
} LNWp$"
int a = temp[l]; W@LR!EW)
int b = temp[r]; }r[BME
for (i = l, j = r, k = l; k <= r; k++) { 7KLq-u-8
if (a < b) { 0Oq1ay^
data[k] = temp[i++]; ^YV[1~O
a = temp; nfEk,(:
} else { ewR0e.g
data[k] = temp[j--]; HvU)GJ u b
b = temp[j]; mD:!"h/
} *&km5@*
} :8FH{sqR
} :/08}!_:
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/** ]H*=Z:riu
* @param data 3FfS+q*3S
* @param l K!j2AP3
* @param i F$v G=3
*/ "|H0 X#
private void insertSort(int[] data, int start, int len) { f3O'lc3
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); lH8?IkK,g
} ofV{SeD67
} #=2~MXa@z7
} )Lq FZ~B
} {Ffr l(*
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堆排序： &^"m6
8w4.|h5FP
package org.rut.util.algorithm.support; ,k4 (b
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import org.rut.util.algorithm.SortUtil; G9]GK+@&F
xK f+.6 wz
/** l%fl=i~oN
* @author treeroot sSxra!tv4
* @since 2006-2-2 L=>N#QR7
* @version 1.0 6N^FJCs
*/ W/+0gh7`,(
public class HeapSort implements SortUtil.Sort{ _F$?Z
>A6lX)
/* (non-Javadoc) on~rrSK
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) fa)G$Q
*/ 2gi`^%#k]
public void sort(int[] data) { S&yCclM
MaxHeap h=new MaxHeap(); 3s+D x$Ud
h.init(data); 2Ig.hnHj
for(int i=0;i h.remove(); Y0DBkg
System.arraycopy(h.queue,1,data,0,data.length); aV1(DZ83
} awUIYAgJ3
Z^b1i`v
private static class MaxHeap{ ^K8Ey#T
fz%urbJR
void init(int[] data){ AO/R2a(:
this.queue=new int[data.length+1]; 0YKG`W
for(int i=0;i queue[++size]=data; N:0mjHG
fixUp(size); Pp?J5HW
} Vki3D'.7N
} <X:7$v6T|
^z_~e@U
private int size=0; ]P-;]*&=
%@LVoP!@!
private int[] queue; <~]s+"oVc
E0w>c'kH
public int get() { s iC/k*
return queue[1]; X\_ku?]v
} cu|{cy-
1^vN?#Kt
public void remove() { 8{'L:yzMY
SortUtil.swap(queue,1,size--); 'y1=Z
fixDown(1); [H!V
} ) "'J]6
file://fixdown rZ<@MV|d
private void fixDown(int k) { (2X`imJ
int j; X ZfT;!wF&
while ((j = k << 1) <= size) { $Z #
if (j < size %26amp;%26amp; queue[j] j++; 26j ; RV
if (queue[k]>queue[j]) file://不用交换 EP*"=_
break; PKk_9Xd
SortUtil.swap(queue,j,k); XfharJ_b
k = j; YajUdpJi
} X180_Kt2
} .,I^)8c
private void fixUp(int k) { |-bAzt
while (k > 1) { Y}QtgZEt
int j = k >> 1; THC34u]
if (queue[j]>queue[k]) !gu# #MrJ9
break; /g@!#Dt
SortUtil.swap(queue,j,k); rz5AIe>Hm
k = j; v="i0lL_
} Z)?B5FF
} !;>j(xc
@uApm~}
} "6o}g.
A@4sb W_
} f!AcBfaLr
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SortUtil： {wVj-w=<W
jt=%oa
package org.rut.util.algorithm; F$X"?fj
J4EQhuQ
import org.rut.util.algorithm.support.BubbleSort; 7M9Ey29f
import org.rut.util.algorithm.support.HeapSort; K?`Fpg(
import org.rut.util.algorithm.support.ImprovedMergeSort; %|Sh|\6A!
import org.rut.util.algorithm.support.ImprovedQuickSort; DvhJkdLB>
import org.rut.util.algorithm.support.InsertSort; R<}UT
import org.rut.util.algorithm.support.MergeSort; >UlAae44
import org.rut.util.algorithm.support.QuickSort; ;W 16Hr Z
import org.rut.util.algorithm.support.SelectionSort; k/srT<
import org.rut.util.algorithm.support.ShellSort; [M?'Nw/[S
AUBZ7*VO
/** ROb2g|YXG
* @author treeroot :%!`R72
* @since 2006-2-2 \\}tD@V"
* @version 1.0 vuN!7*d+
*/ Q6%dM'fR
public class SortUtil { cc37(=oKL
public final static int INSERT = 1; ,X^I]]
public final static int BUBBLE = 2; D[#6jJAb
public final static int SELECTION = 3; , !0-;H.Y
public final static int SHELL = 4; H+lBb$
public final static int QUICK = 5; 6)5Akyz4V
public final static int IMPROVED_QUICK = 6; `0)'&HbLY
public final static int MERGE = 7; S3fyt]pp
public final static int IMPROVED_MERGE = 8; 9\f%+?p
public final static int HEAP = 9; M4rI]^lJ
~IQ3B$4H&
public static void sort(int[] data) { xWR<>Og.
sort(data, IMPROVED_QUICK); *UxN~?N|
} {&3{_Ml
private static String[] name={ *M^(A}+O
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" !N"Y
}; s\/$`fuhx
]&+,`1_q
private static Sort[] impl=new Sort[]{ #"&<^
new InsertSort(), 7:Cq[u fl
new BubbleSort(), pA?kv]l(
new SelectionSort(), nNj<!}HvV
new ShellSort(), ^t0Yh%V7
new QuickSort(), V;@kWE>3
new ImprovedQuickSort(), <?h,;]U
new MergeSort(), /u&{=nU
new ImprovedMergeSort(), y*oH"]D
new HeapSort() a|Yry
}; S:F8`Gh
(:h#H[F
public static String toString(int algorithm){ M?[~_0_J
return name[algorithm-1]; rP%B#%;S"
} OK8|w]-A
_-6IB>
public static void sort(int[] data, int algorithm) { H5,rp4H9
impl[algorithm-1].sort(data); X<p'&
} .=`r?#0
<<vT"2Q]
public static interface Sort { -h%!#g
public void sort(int[] data); V(#z{!
} e09('SON(
q\uzmOh
public static void swap(int[] data, int i, int j) { EEI!pi
int temp = data; x )w6
data = data[j]; D}i_#-^MH
data[j] = temp; 4+1aW BJ2
} (^lw<$N
} 5`tMHgQO