[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; ]m]`J|%i
} bP,<^zA|X
int i1=l; r@r%qkh(.@
int i2=mid+1; 0r]n 0?x
for(int cur=l;cur<=r;cur++){ 0QQss
if(i1==mid+1) <?jdNM
data[cur]=temp[i2++]; 93-Y(Xx)bY
else if(i2>r) yev!Nw
data[cur]=temp[i1++]; Vla,avON
else if(temp[i1] data[cur]=temp[i1++]; IS C.~q2
else B.<SC
data[cur]=temp[i2++]; a(Y'C`x
} *2X6;~
} ]`o5eByo
lwnO
} }ze+ tf
XLpP*VH3
改进后的归并排序: [)H 6`w
t@RYJmW
package org.rut.util.algorithm.support; #GsOE#*>T
SpH|<L3
import org.rut.util.algorithm.SortUtil; e r" w{
c=\tf~}^Ms
/** (5a73%>@
* @author treeroot MsB>3
* @since 2006-2-2 7GA8sK
* @version 1.0 Wj{lb_Rj
*/ B|(g?
public class ImprovedMergeSort implements SortUtil.Sort { ! VwU=5
Xo^8o0xi
private static final int THRESHOLD = 10; AXfU$~
8(3(kZxS
/* iT@`dEZ.
* (non-Javadoc) D6SUzI1+H
* |1tKQ0jg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) FU|brSt
*/ npP C;KD
public void sort(int[] data) { !U`&a=k
int[] temp=new int[data.length]; N_t,n^i9>*
mergeSort(data,temp,0,data.length-1); (1/Sf&2i
} _ %s#Cb
{%jAp11y+O
private void mergeSort(int[] data, int[] temp, int l, int r) { 9rB3h`AVF
int i, j, k; I?KN7(9u?
int mid = (l + r) / 2; ~W'DEpq_
if (l == r) P\7DA4]
return; 5f0M{J,KC
if ((mid - l) >= THRESHOLD) ~z[`G#dU
mergeSort(data, temp, l, mid); /i+z#q5'
else Q @}$b(b
insertSort(data, l, mid - l + 1); 0'q4=!l
if ((r - mid) > THRESHOLD) $CcjuPsK
mergeSort(data, temp, mid + 1, r); %wD#[<BGn>
else yCX5 5:
insertSort(data, mid + 1, r - mid); j:9M${~
68%aDs
for (i = l; i <= mid; i++) { 6iFlz9XiI
temp = data; $m`Dyu
} MVatV[G
for (j = 1; j <= r - mid; j++) { &lc@]y8
temp[r - j + 1] = data[j + mid]; HC0juT OiO
} 0JR/V68$
int a = temp[l]; ~$!,-r
int b = temp[r]; B5\l&4X
for (i = l, j = r, k = l; k <= r; k++) { |T#cq!
if (a < b) { 1=VyD<dNG6
data[k] = temp[i++]; xBHf~:!
a = temp; D#jwI,n}x
} else { 9#E *o~1
data[k] = temp[j--]; b[%@3}E
b = temp[j]; ZlV
} $`pf!b2Z
} UBo0c?,4
} S)CsH1Q
HG]ARgOB
/** FlO?E3d
* @param data AXw qN:P}
* @param l 7:`XE&Z
* @param i ;_sJ>.=\
*/ Gz`Jzh j
private void insertSort(int[] data, int start, int len) { X)g X9DA
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cIug~ x>
} h'ik3mLH
} =D zrM%
} WC_.j^sW
} G/x6zdk
2"0VXtv6
堆排序： gI:g/ R
!G%!zNA S
package org.rut.util.algorithm.support; bGh&@&dHr
'r'=%u$1C
import org.rut.util.algorithm.SortUtil; &oL"AJU
xvGYd,dlK
/** z/Lb1ND8
* @author treeroot * :"*'
* @since 2006-2-2 hV3]1E21"
* @version 1.0 ]4rmQAS7"
*/ Q`CuZkP(
public class HeapSort implements SortUtil.Sort{ b[vE!lJEq
Rtf<UhUn
/* (non-Javadoc) @6UY4vq9
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) %Z;RY5
*/ T! }G51
public void sort(int[] data) { /N0mF< P
MaxHeap h=new MaxHeap(); Owp]>e
h.init(data); f,YORJ
for(int i=0;i h.remove(); v]JET9hY
System.arraycopy(h.queue,1,data,0,data.length); ~B<\#oO
} eDd&vf
#y\O+\4e
private static class MaxHeap{ T*p7[}#
_ep&`K
void init(int[] data){ [[T7s(3
this.queue=new int[data.length+1]; ueg%yvO
for(int i=0;i queue[++size]=data; ^C gg1e1
fixUp(size); ZllmaI
} o HK
} ]H`wE_2tu
`(W"wC
private int size=0; F"Dr(V
PpRS4*nR
private int[] queue; G>~/
1I;q@g0
public int get() { &zn|),
return queue[1]; h]zok}$
} ~XUUrg;
rEr=Mi2
public void remove() { Vy&X1lG:
SortUtil.swap(queue,1,size--); n'rq
fixDown(1); ?M90K)&g{
} VnuG^)S
file://fixdown %+r(*Q+0$f
private void fixDown(int k) { ^;II@n i
int j; "t2T*'j{
while ((j = k << 1) <= size) { Y] 1U108
if (j < size %26amp;%26amp; queue[j] j++; \Y,P
if (queue[k]>queue[j]) file://不用交换 (U\o0LI
break; i7RK*{
SortUtil.swap(queue,j,k); R0M>'V?e
k = j; $#^3>u
} Z%#e* O0
} s.(.OXD&
private void fixUp(int k) { mmQC9nZ
while (k > 1) { 4n#u?)
int j = k >> 1; H Qj,0#J)
if (queue[j]>queue[k]) y^r'4zN'
break; $y;w@^
SortUtil.swap(queue,j,k); o.$48h(
k = j; .p{lzI9
} yCz"~c
} Rd(8j+Q?ps
[KUkv
} `&I6=,YLp
~ESw* 6s9
} P]"@3Z&w
?;=7{Ej
SortUtil： 7L+Wj }m
*wAX&+);
package org.rut.util.algorithm; E[hSL#0
7]@M
import org.rut.util.algorithm.support.BubbleSort; u%L6@M2
import org.rut.util.algorithm.support.HeapSort; Wz^;:6F
import org.rut.util.algorithm.support.ImprovedMergeSort; ]:ca=&>
import org.rut.util.algorithm.support.ImprovedQuickSort; ~N/%R>(v
import org.rut.util.algorithm.support.InsertSort; Sh;`<Ggi~
import org.rut.util.algorithm.support.MergeSort; %X\J%Fj
import org.rut.util.algorithm.support.QuickSort; QM!UMqdj
import org.rut.util.algorithm.support.SelectionSort; yS)k"XNb
import org.rut.util.algorithm.support.ShellSort; B^19![v3T
Zn1((J7
/** H#F"n"~$
* @author treeroot W}F~vx.
* @since 2006-2-2 wz+mFf
* @version 1.0 :WH{wm|
*/ HF*~bL
public class SortUtil { )fXxkOd
public final static int INSERT = 1; 5hqXMs
public final static int BUBBLE = 2; ko.%@Y(=
public final static int SELECTION = 3; z:UkMn[
public final static int SHELL = 4; 0gyvRM@ x[
public final static int QUICK = 5; D}%VZA}].
public final static int IMPROVED_QUICK = 6; FoIK, MdJ
public final static int MERGE = 7; =}ZY`O*/
public final static int IMPROVED_MERGE = 8; Z=hn}QY.(
public final static int HEAP = 9; ZSlK
?:q"qwt$F
public static void sort(int[] data) { 0r@LA|P
sort(data, IMPROVED_QUICK); 3{H!B&sb
} jHMP"(]
private static String[] name={ y;0Zk~R$
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" mj9|q8v{+
}; Uq=Rz8hLM
&WCVdZK:
private static Sort[] impl=new Sort[]{ b`wT*&
new InsertSort(), 2!f'l'}
new BubbleSort(), bil>;&h
new SelectionSort(), 7ey|~u2
new ShellSort(), (3,7
new QuickSort(), 2AqcabI9
new ImprovedQuickSort(), Jbima>
new MergeSort(), m:EYOe,w
new ImprovedMergeSort(), ")boY/ P/w
new HeapSort() q89yW)XG
}; a"+VP>4
b6g9!
public static String toString(int algorithm){ 9~,!+#
return name[algorithm-1]; i(u zb<
} a"+/fC`
CE183l\
public static void sort(int[] data, int algorithm) { yl<=_Q
impl[algorithm-1].sort(data); 9<Zm}PE32
} VQ~eg wJL
I%?M9y.u6
public static interface Sort { 1_~'?'&^
public void sort(int[] data); 7Aw <:
} J_ h\tM
8=\k<X{`
public static void swap(int[] data, int i, int j) { {YzpYc1
int temp = data; J(~xU0gd'
data = data[j]; ^[HX#JJ~
data[j] = temp; |bRi bB
} ZZL%5{w_
} Y\H4.$V