[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; Xao 0cb.R
} =BW>jD
int i1=l; l(|@ dp
int i2=mid+1; [H$37Hx!
for(int cur=l;cur<=r;cur++){ gHc0n0ZV
if(i1==mid+1) 5]n5nqz
data[cur]=temp[i2++]; c%Ht; sK`*
else if(i2>r) WMfu5x7e4
data[cur]=temp[i1++]; /=co/}i
else if(temp[i1] data[cur]=temp[i1++]; 8d.5D&
else VaQqi>;\
data[cur]=temp[i2++]; +Mth+qgw
} \P% E1c#
} Enr8"+.(
S;[g0j
} i_8q!CL@{
A9^t$Ii
改进后的归并排序: bQc-ryC+.
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package org.rut.util.algorithm.support; Nq %@(K
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import org.rut.util.algorithm.SortUtil; \5.36Se
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/** apQ` l^
* @author treeroot 7A@GNA
* @since 2006-2-2 ]&%_Fpx
* @version 1.0 C8i6ESmU
*/ _/0vmgQ&
public class ImprovedMergeSort implements SortUtil.Sort { !U38aHG
!}fq%8"-
private static final int THRESHOLD = 10; t>;u;XY!;
>-fOkOWXy
/* !_<zK:`-L
* (non-Javadoc) Ig*68M<
* 2:0'fNXop
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) V;$ME4B\{
*/ $,R QA^gxW
public void sort(int[] data) { 6rlafISvO
int[] temp=new int[data.length]; lrg3n[y-l
mergeSort(data,temp,0,data.length-1); ?.66B9Lld
} p%A s6.
|f+|OZY
private void mergeSort(int[] data, int[] temp, int l, int r) { F8{"Rk}
int i, j, k; :[f2iZ"
int mid = (l + r) / 2; z^s/7Va[
if (l == r) J WaI[n}
return; u2crL5^z2)
if ((mid - l) >= THRESHOLD) 7u/_3x1
mergeSort(data, temp, l, mid); QfjgBJo%
else -m*IpDi
insertSort(data, l, mid - l + 1); RB7?T5G
if ((r - mid) > THRESHOLD) mZLrU<)Y
mergeSort(data, temp, mid + 1, r); ?g*#ld()
else 3B|?{U~
insertSort(data, mid + 1, r - mid); .|x\6 jf
)i@j``P
for (i = l; i <= mid; i++) { It.G-(
temp = data; fW^\G2Fk
} NUH;\*]8s
for (j = 1; j <= r - mid; j++) { -7^?40A
temp[r - j + 1] = data[j + mid]; KDD_WXGt~
} wWV`k
int a = temp[l]; oGz-lO{lt
int b = temp[r]; ()L[l@m
for (i = l, j = r, k = l; k <= r; k++) { =?fxPT[1K
if (a < b) { Q; DN*
data[k] = temp[i++]; (dZu&
a = temp; RK%N:!fq=
} else { CSF-2lSG
data[k] = temp[j--]; FJ]BB4 K
b = temp[j]; 6^ UQ{P1;
} 6;rJIk@Fx=
} z3RD*3b
} U1zcJl^
-olD!zKS
/** oCD#Gmr
* @param data `uL^!-
* @param l 6 6S I
* @param i E#'JYz@
*/ zq ;YE
private void insertSort(int[] data, int start, int len) { ^~iu),gu
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); *xY}?vSs
} EXt?xiha?
} sp%EA=: E
} 0< i]ph
} |#hj O3
GF(<!PC
堆排序： @lvvI<U
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package org.rut.util.algorithm.support; )*j>g38?
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import org.rut.util.algorithm.SortUtil; x3cno#
f0UB? |
/** |l5ol@2*
* @author treeroot W$_}lE$
* @since 2006-2-2 <Z^P8nu
* @version 1.0 [,;h1m ~iX
*/ fB.xjp?
public class HeapSort implements SortUtil.Sort{ ~zdHJ8tYp
$$my,:nH
/* (non-Javadoc) <_X`D4g]XO
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) !V|%n(O"
*/ v X=zqV
public void sort(int[] data) { 5}J|YKyP
MaxHeap h=new MaxHeap(); 34k}7k~n
h.init(data); g5THkxp
for(int i=0;i h.remove(); cBxBIC
System.arraycopy(h.queue,1,data,0,data.length); /]pBcb|<
} .Pz( 0Y
x\/N09
private static class MaxHeap{ 3]Jl\<0
VXr'Z
void init(int[] data){ j,@N0~D5
this.queue=new int[data.length+1]; []opPQ 1
for(int i=0;i queue[++size]=data; Vaj4p""\F
fixUp(size); a~#MMl
} cL/6p0S
} fb8"hO]s
6]`XW0{C
private int size=0; `$V7AqX(
V4c$V]7
private int[] queue; cRt[{HE
)"Ef* /+
public int get() { kJ^)7_3
return queue[1]; mM*jdm(!
} cT8b$P5w
R4xoc;b
public void remove() { rLt`=bl&&U
SortUtil.swap(queue,1,size--); ED9uKp<Wbv
fixDown(1); rgth2y]
} O3U6"{yJ)
file://fixdown Jxyeh1zqB
private void fixDown(int k) { w QV4[
int j; 0}(ZW~&1
while ((j = k << 1) <= size) { @|yRo8|
if (j < size %26amp;%26amp; queue[j] j++; ']'H8Y-M
if (queue[k]>queue[j]) file://不用交换 }o>6 y>=
break; zGm#erE
SortUtil.swap(queue,j,k); kzZdYiC
k = j; N*d )<8_
} D%PrwfR
} r&^LSTU0!
private void fixUp(int k) { &c;@u?:@S
while (k > 1) { 3$cIm+
int j = k >> 1; CYIp 3D'k
if (queue[j]>queue[k]) uU_0t;oR3
break; Z0fl]3p
SortUtil.swap(queue,j,k); \>8r)xC
k = j; wI\ n%#
} YX||\
} nveHLHvC7
/CpU.^V
} DA>_9o/l
L;wfTZa
} SZGeF;N
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SortUtil： 0RaE!4)!;
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package org.rut.util.algorithm; Oa[G #
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import org.rut.util.algorithm.support.BubbleSort; wi{qN___
import org.rut.util.algorithm.support.HeapSort; yrp;G_
import org.rut.util.algorithm.support.ImprovedMergeSort; Tt,<@U[/}
import org.rut.util.algorithm.support.ImprovedQuickSort; x3X^\Ig
import org.rut.util.algorithm.support.InsertSort; RTHe#`t
import org.rut.util.algorithm.support.MergeSort; %Se@8d8
import org.rut.util.algorithm.support.QuickSort; egOZ.oV
import org.rut.util.algorithm.support.SelectionSort; :n1^Xw0q
import org.rut.util.algorithm.support.ShellSort; ?Hb5<,1u3
jzRfD3_s
/** fgmu*\x<
* @author treeroot Fpz)@0K;
* @since 2006-2-2 zli@XZ#
* @version 1.0 /h)_Q;35S;
*/ ]Q?`|a+i
public class SortUtil { H9d!-9I
public final static int INSERT = 1; Mq!vu!
public final static int BUBBLE = 2; :>@6\
public final static int SELECTION = 3; W u4` 3
public final static int SHELL = 4; cba
public final static int QUICK = 5; 2`D1cX
public final static int IMPROVED_QUICK = 6; Idy{(Q
public final static int MERGE = 7; R`)^eqB
public final static int IMPROVED_MERGE = 8; PEKU
public final static int HEAP = 9; 0?]Y^:
$L~?!u&N
public static void sort(int[] data) { J>H$4t#HX
sort(data, IMPROVED_QUICK); {'.[N79xP
} =F!_ivV
private static String[] name={ x,f=J4yco
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" pS1f y]
}; c ilo8x`
zv1#PfO@)
private static Sort[] impl=new Sort[]{ 4G:?U6
new InsertSort(), +<\)b(
new BubbleSort(), TFIP>$*_C
new SelectionSort(), (?9@nS
new ShellSort(), Ts+S>$
new QuickSort(), M Y2=lT
new ImprovedQuickSort(), a>3#z2#
new MergeSort(), O WJv<3
new ImprovedMergeSort(), U Bo[iZ|%
new HeapSort() F\!Va
}; G5C=p:o{/
.7h:/d Y:
public static String toString(int algorithm){ 7Ya4>*B
return name[algorithm-1]; Ya%-/u
} 3WOm`<
#FAy ]7/O
public static void sort(int[] data, int algorithm) { /S}4J"
impl[algorithm-1].sort(data); R2]2#3`
} [?dsS$Y3
Hr?_`:
public static interface Sort { /< OoZf+[
public void sort(int[] data); aP#nK
} /(iq^
XXx]~m
public static void swap(int[] data, int i, int j) { 8'niew 5d
int temp = data; Ia>07av
data = data[j]; b7thu5
data[j] = temp; |OgtAI9
} >I9w|zFA
} *,hg+?lZ