[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; IO]tO[P#
} Qwve-[
int i1=l; j5A>aj
int i2=mid+1; (44L8)I.D
for(int cur=l;cur<=r;cur++){ )>U"WZ'<
if(i1==mid+1) #2$wI^O
data[cur]=temp[i2++]; -$_FKny
else if(i2>r) B-$zioZ
data[cur]=temp[i1++]; wXZ9@(^
else if(temp[i1] data[cur]=temp[i1++]; &9z&#`AY]>
else eu~ u-}.
data[cur]=temp[i2++]; ~%eE%5!k
} O(v>\MV
} B9$pG
[_(uz,'
} BUV4L5(
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改进后的归并排序: NU+PG`Vb
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package org.rut.util.algorithm.support; \I^"^'CP
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import org.rut.util.algorithm.SortUtil; D:?"Rf{)
2`ERrh^i"
/** $P#+Y,r~\
* @author treeroot 2chT^3e
* @since 2006-2-2 30(e6T;
* @version 1.0 +W8#]u|
*/ :D>flZi
public class ImprovedMergeSort implements SortUtil.Sort { [nX{sM%
-;RAW1]}Y$
private static final int THRESHOLD = 10; V:+vB "
0"+QWh
/* ;- Vs|X
* (non-Javadoc) hp}rCy|01
* {!{T,_ J
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) /X#OX8gb]
*/ I\rjw$V#
public void sort(int[] data) { 9ao?\]&t
int[] temp=new int[data.length]; f(K1,L:&7
mergeSort(data,temp,0,data.length-1); ;ByCtVm2
} O8rd*+
XRyeEwA;pp
private void mergeSort(int[] data, int[] temp, int l, int r) { zJ ;]z0O
int i, j, k; '-G,7!.,r%
int mid = (l + r) / 2; \,:7=
if (l == r) = 1d$x:
return; Et}%sdS
if ((mid - l) >= THRESHOLD) CUjRz5L
mergeSort(data, temp, l, mid); 4j i#Q
else {4p7r7n'
insertSort(data, l, mid - l + 1); N "eK9>
if ((r - mid) > THRESHOLD) vt5>>rl
mergeSort(data, temp, mid + 1, r); !y!s/i&P%
else r8FAV9A
insertSort(data, mid + 1, r - mid); 4K4u]"1
"/UPq6
for (i = l; i <= mid; i++) { =FFs8&PKys
temp = data; o$*DFvk
} CPP9=CoR37
for (j = 1; j <= r - mid; j++) { SL^%Zh/~
temp[r - j + 1] = data[j + mid]; ,p\*cHB9
} ,pkzNe`F
int a = temp[l]; `fVzY"Qv k
int b = temp[r]; cRf;7G
for (i = l, j = r, k = l; k <= r; k++) { U^-J_yq
if (a < b) { wjOqCF"
data[k] = temp[i++]; ;[Esop
a = temp; qzo)\,
} else { ?q5HAIZ`
data[k] = temp[j--]; JKCV>k
b = temp[j]; Vt9o8naz
} mcQ\"9;pY
} 6jl{^dI
} pMp@W`i^6
Tm~jYgJ
/** *t={9h
* @param data {z'Gg
* @param l YsO`1D
* @param i Rob:W|
*/ aIWpgUd`
private void insertSort(int[] data, int start, int len) { (ijO|%?
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); 6skd>v UU
} eMH\]A~v"
} *\Hut'7 d
} ~H]d9C
} /`O'eH
5=4-IO6W[]
堆排序： \D[~54
L;KLmxy#
package org.rut.util.algorithm.support; 9@*4^Ks p
-OfAl~ 4
import org.rut.util.algorithm.SortUtil; [Kbna>`
vha@YPC=
/** A{')
* @author treeroot I+Fr#1
* @since 2006-2-2 \}Pr!tk!
* @version 1.0 )9!ZkZbv_m
*/ a$6pA@7}
public class HeapSort implements SortUtil.Sort{ wo^1%:@/2
^$lsmF]^
/* (non-Javadoc) o`}8ZtD
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 7G_lGV_
*/ 2L1Azx
public void sort(int[] data) { 6(HJYa
MaxHeap h=new MaxHeap(); 8[8U49V9(
h.init(data); x/92],.Mz
for(int i=0;i h.remove(); :/NP8$~@j
System.arraycopy(h.queue,1,data,0,data.length); bHHR^*B
} x1:1Jj:
+OUM 4y
private static class MaxHeap{ ^}GR!990
H329P*P
void init(int[] data){ yhyh\.
this.queue=new int[data.length+1]; )#Y:Bj7H@2
for(int i=0;i queue[++size]=data; Q@UY4gA'
fixUp(size); q{)Q ?E
} %E2C4UbY
} .>(qZEF
E95VR?nUg
private int size=0; ]m^ECA$
.MRLAG
private int[] queue; iWn7vv/t
"S&1J8D|
public int get() { }HZ'i;~r|9
return queue[1]; KhbbGdmfS$
} ;{cl*EN
'zTa]y]a
public void remove() { 5d82Ms
SortUtil.swap(queue,1,size--); f<3r;F7
fixDown(1); {|@N~c+
} Wy$Q!R=i
file://fixdown \G1(r=fU
private void fixDown(int k) { /M_kJe,%
int j; !E\J`K0_e
while ((j = k << 1) <= size) { c1_?Z
if (j < size %26amp;%26amp; queue[j] j++; {*4Z9.2c*
if (queue[k]>queue[j]) file://不用交换 %w6lNl
break; 9}Zi_xK&|e
SortUtil.swap(queue,j,k); 8m)E~6
k = j; OB~74}3;
} Ga^k1TQq
} ,Onu%
private void fixUp(int k) { F?TmOa0
while (k > 1) { 6~q"#94
int j = k >> 1; H\e<fi%Q
if (queue[j]>queue[k]) HLM"dmI
break; = G3A}
SortUtil.swap(queue,j,k); y|Zj M
k = j; BRMR> ~k(
} C/pu]%n@4
} ^kpu9H
&]/.=J
} <3Hu(Jx<O
iD9hqiX&
} MMUw+jM4
#Y<b'7yJ
SortUtil： b~FmX
jl4rEzVu
package org.rut.util.algorithm; bjq2XP?LL
u@zBE? g
import org.rut.util.algorithm.support.BubbleSort; #/`V.jXt>
import org.rut.util.algorithm.support.HeapSort; gG=E2+=uy
import org.rut.util.algorithm.support.ImprovedMergeSort; ]7{-HuQ8>}
import org.rut.util.algorithm.support.ImprovedQuickSort; x;*KRO
import org.rut.util.algorithm.support.InsertSort; :dzamHbX9
import org.rut.util.algorithm.support.MergeSort; ,\f!e#d
import org.rut.util.algorithm.support.QuickSort; n8[ sl]L
import org.rut.util.algorithm.support.SelectionSort; ".eD&oX{
import org.rut.util.algorithm.support.ShellSort; Z*QsDS
nJ4i[j8
/** Qsc%qt-l
* @author treeroot /4]M*ls
* @since 2006-2-2 QOkPliX
* @version 1.0 m-UI^M,@<
*/ nqt;Ge M
public class SortUtil { &V[m{.
public final static int INSERT = 1; q7C>A`w
public final static int BUBBLE = 2; 5~CHj
public final static int SELECTION = 3; 0I4RZ.2*Y
public final static int SHELL = 4; a="Z]JGk
public final static int QUICK = 5; !~cTe!T
public final static int IMPROVED_QUICK = 6; XFPWW,
public final static int MERGE = 7; %J?;@ G)r
public final static int IMPROVED_MERGE = 8; |?SK.1pW
public final static int HEAP = 9; -U(T
<Vr"
public static void sort(int[] data) { |Gb"%5YD
sort(data, IMPROVED_QUICK); x5k6yHn
} %^g BDlR^
private static String[] name={ 3ADTYt".
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" ` IiAtS
}; _YY:}'+
*?K3jy{
private static Sort[] impl=new Sort[]{ g6k@E,cI_
new InsertSort(), YsXP$y]g-
new BubbleSort(), z{cIG8z
new SelectionSort(), ]n0kO&
new ShellSort(), vW 0m%
new QuickSort(), 6yKr5tH4
new ImprovedQuickSort(), 6e$(-ai
new MergeSort(), JB a:))lw
new ImprovedMergeSort(), h&||Ql1
new HeapSort() impzqQlZ,
}; $6T*\(;T@A
`itaQGLD
public static String toString(int algorithm){ !q! =VC
return name[algorithm-1]; RZ9vQ\X U)
} 7E4=\vM
eZ y)>.6Z
public static void sort(int[] data, int algorithm) { ;OQ{
impl[algorithm-1].sort(data); q-3%.<LL
} LZV
xjiMM>|n
public static interface Sort { !dYkvoQNn
public void sort(int[] data); *?7Ie;)
} DF/p{s1Y3
l.?R7f
public static void swap(int[] data, int i, int j) { MVK='
int temp = data; NA>h$N
data = data[j]; R 28v5
data[j] = temp; /NaIMo5
} c$Js<[1
} ?&ThMWl