[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; ,![C8il,
} E6BW&Xp
int i1=l; V GM/ed5-
int i2=mid+1; Ik~5j(^E-
for(int cur=l;cur<=r;cur++){ J2yq|n?2gq
if(i1==mid+1) Cvi-4
data[cur]=temp[i2++]; @-Gf+*GZys
else if(i2>r) a#KxjVM
data[cur]=temp[i1++]; nj)M$'
else if(temp[i1] data[cur]=temp[i1++]; k98--kc5
else +]UPY5:F
data[cur]=temp[i2++]; A.y"R)G
} 7!Fu.Ps >
} R-Uj\M>
v]vrD2L
} .\< \J|3
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改进后的归并排序: {T.$xiR
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package org.rut.util.algorithm.support; 4oCnF+(
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import org.rut.util.algorithm.SortUtil; |1rBK.8
'gQm%:qU3r
/** LP.-
* @author treeroot =]"[?a >
* @since 2006-2-2 *:)#'cenI
* @version 1.0 gl00$}C
*/ _U'edK]R
public class ImprovedMergeSort implements SortUtil.Sort { 8=t?rA
vR#A7y @!
private static final int THRESHOLD = 10; Y|KX:9Y@
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/* sp'q=^t
* (non-Javadoc) '(I"54W
* &zUo",}9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) {hVSVx8ZL
*/ 'g( R4deCX
public void sort(int[] data) { dqPJ 2j $\
int[] temp=new int[data.length]; @4hxGk=
mergeSort(data,temp,0,data.length-1); 7;c{lQOj}
} &\K,kS[.r
l{Xsh;%=
private void mergeSort(int[] data, int[] temp, int l, int r) { '[:].?M
int i, j, k; {.eC"
int mid = (l + r) / 2; )Z"7^i
if (l == r) k' pu%nWN
return; h&.9Q{D
if ((mid - l) >= THRESHOLD) vk.Y2 :
mergeSort(data, temp, l, mid); #P18vK5
else H`B%6S/
insertSort(data, l, mid - l + 1); :P;#Y7}Y$
if ((r - mid) > THRESHOLD) (w@|:0t^y[
mergeSort(data, temp, mid + 1, r); @v@'8E Q
else Yb414K
insertSort(data, mid + 1, r - mid); 'j>^L
90teXxg=|
for (i = l; i <= mid; i++) { QMHeU>
temp = data; m,qU})
} C6Dq7~{B
for (j = 1; j <= r - mid; j++) { Vs\)w>JF
temp[r - j + 1] = data[j + mid]; AaKILIIQZ
} )` '
int a = temp[l]; $;"@;Lj%,
int b = temp[r]; ,_P(!7Z8
for (i = l, j = r, k = l; k <= r; k++) { ml\7JW6Rx
if (a < b) { U#@:"v|
data[k] = temp[i++]; }+I 8l'
a = temp; Cg8{NNeD
} else { 6R dfF$f
data[k] = temp[j--]; ()3+!};
b = temp[j]; l AE$HP'o
} *slZ17xg
} bAt!9uFn
} i1C]bUXA
I-&/]<5y
/** Lp1wA*
* @param data RhX 2qsva-
* @param l p;X[_h
* @param i <N+l"Re#]
*/ ~"+[VE5
private void insertSort(int[] data, int start, int len) { RSzp-sKB
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); L.ndLd
} Br1JZHgA
} iTqv=
} B~yD4^
} s13Iu#
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堆排序： f5mk\^
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package org.rut.util.algorithm.support; r(J7&vR}h
I{B8'n{cN
import org.rut.util.algorithm.SortUtil; izmL8U ?t
DCP"
/** .E[k}{k,
* @author treeroot ^=.|\ YM
* @since 2006-2-2 nLdI>c9R
* @version 1.0 -}PD0Pzg;=
*/ gaTI:SKzc
public class HeapSort implements SortUtil.Sort{ 'Kp|\Tr
tv\P$|LV`8
/* (non-Javadoc) &..'7
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) C0KP,JS&
*/ _pjpPSV6J
public void sort(int[] data) { vJmE}
MaxHeap h=new MaxHeap(); l&;#`\s!V
h.init(data); B7N?"'$i
for(int i=0;i h.remove(); /!jn$4fd:
System.arraycopy(h.queue,1,data,0,data.length); +!.=M8[
} R"=G?d)
\HTXl]
private static class MaxHeap{ }w"laZ*
|]\qI
void init(int[] data){ n8R{LjJ2@
this.queue=new int[data.length+1]; xxiEL2"`>
for(int i=0;i queue[++size]=data; LT:KZ|U9
fixUp(size); .NwHr6/s*
} GJ{]}fl
} &d9";V"E
DQKhR sC
private int size=0; 6ZCt xs!
DFqXZfjm
private int[] queue; YX@[z 5*
*<s|WLMG
public int get() { 2l8jw:=H
return queue[1]; OC"W=[Myl
} #LBZ%%v
]7c715@
public void remove() { U*[/F)!
SortUtil.swap(queue,1,size--); =,,!a/U
fixDown(1); F9-xp7T
} RUSBJsMB
file://fixdown Jr 9\j3J{
private void fixDown(int k) { ze!7qeW
int j; CbI[K|
while ((j = k << 1) <= size) { 8(5}Jo+
if (j < size %26amp;%26amp; queue[j] j++; SP5/K3t-*
if (queue[k]>queue[j]) file://不用交换 oy#Qj3M8=
break; W}a&L
SortUtil.swap(queue,j,k); 9M<qk si
k = j; co@Q
} Fag%#jxI
} vezX/xD?
private void fixUp(int k) { |BF4F5wC?
while (k > 1) { to]1QjW-
int j = k >> 1; BWfsk/lej
if (queue[j]>queue[k]) }\P9$D+
break; `NyvJt^<
SortUtil.swap(queue,j,k); JEs?Rm1^.
k = j; |4ONGU*`E
} 7 45Uo'
} K7U`
IGOqV>;
} (lTM^3 }
I[@}+p0
} u ;f~
V!a\:%#^Y
SortUtil： v; &-]ka
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package org.rut.util.algorithm; FF)F%o+:w
[#M^:Q
import org.rut.util.algorithm.support.BubbleSort; _Cj u C`7
import org.rut.util.algorithm.support.HeapSort; +tES:3Pi
import org.rut.util.algorithm.support.ImprovedMergeSort; Y u8a8p|
import org.rut.util.algorithm.support.ImprovedQuickSort; m9a(f>C
import org.rut.util.algorithm.support.InsertSort; Qt+ K,LY
import org.rut.util.algorithm.support.MergeSort; pg [F{T<
import org.rut.util.algorithm.support.QuickSort; :,]V03
import org.rut.util.algorithm.support.SelectionSort; 7=aF-;X3jj
import org.rut.util.algorithm.support.ShellSort; VSL6tQp
4b,N"w{v
/** #t>w)`bA-
* @author treeroot jyb/aov
* @since 2006-2-2 Q]uxZ;}aF
* @version 1.0 p.SEW5
*/ b$l@Z&[]
public class SortUtil { /608P:U
public final static int INSERT = 1; -WWa`,:
public final static int BUBBLE = 2; PeEC|&x
public final static int SELECTION = 3; y9cW&rDH
public final static int SHELL = 4; BlF>TI%2
public final static int QUICK = 5; kXFgvIpg<
public final static int IMPROVED_QUICK = 6; [nZ3}o
public final static int MERGE = 7; se:]F/
public final static int IMPROVED_MERGE = 8; EC<g7_0F
public final static int HEAP = 9; n{s `XyH
.z^ePZ|mV
public static void sort(int[] data) { Uf}s6#
sort(data, IMPROVED_QUICK); )$p<BLU
} &^=6W3RD
private static String[] name={ 6",S$3q
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" sgW*0o
}; .]SE>3
0>} FNRC
private static Sort[] impl=new Sort[]{ xE`uFHuS}
new InsertSort(), +F=j1*'&
new BubbleSort(), KSe`G;{
new SelectionSort(), t}n:!v"|+O
new ShellSort(), Nj4=
new QuickSort(), ,Dd )=
new ImprovedQuickSort(), .aTu]i3l_
new MergeSort(), \Ld/'Z;w
new ImprovedMergeSort(), s ~c_9,JK
new HeapSort() }q7rR:g
}; ?"-%>y@w
sx7;G^93
public static String toString(int algorithm){ s~(!m. R
return name[algorithm-1]; `L n,qiA
} /E8{:>2
GxjmHo
public static void sort(int[] data, int algorithm) { 2IDN?Mw
impl[algorithm-1].sort(data); Ldqn<wNnI
} 'e @`HG
H5wzzSV!:B
public static interface Sort { 2UqLV^ZY
public void sort(int[] data); g+'=#NS}
} u~[=5r
od\-o:bS
public static void swap(int[] data, int i, int j) { }e[;~g\&
int temp = data; KA^r,Iw
data = data[j]; Am>^{qh9
data[j] = temp; [H"\<"1o
} k/'>,WE
} |KH981