[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; 1l8kuwH
} +c8cyx:^f
int i1=l; [(hB%x_"
int i2=mid+1; /SXms'C
for(int cur=l;cur<=r;cur++){ Sxj _gn
if(i1==mid+1) SGZ]_
data[cur]=temp[i2++]; gwf*M3(
else if(i2>r) ~miRnW*x
data[cur]=temp[i1++]; /~4wM#Yi8
else if(temp[i1] data[cur]=temp[i1++]; BIFuQ?j3
else v(ATbY75
data[cur]=temp[i2++]; ~JU :a@)
} sRM3G]nUr
} S$=e %c
.7BB*!CP
} =:|fN3nJ2
ylV.ZoY6
改进后的归并排序: ;}=4z^^5
FY^#%0~
package org.rut.util.algorithm.support; 75O-%9lFF
z3RlD"F1
import org.rut.util.algorithm.SortUtil; v,\2$q/
6X@]<R
/** BUuU#e5
* @author treeroot :4{;^|RgU
* @since 2006-2-2 +<^TyIJ0
* @version 1.0 ]h Dy]
*/ zF&>1y.$
public class ImprovedMergeSort implements SortUtil.Sort { ?q68{!{bi
!'-|]xx(
private static final int THRESHOLD = 10; nvJ2V$
]^='aQ
/* >%~E <
* (non-Javadoc) rCwjy&SuU^
* wU\3"!^h
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) 1I'ep\`"X
*/ K?y!zy
public void sort(int[] data) { Yj^| j
int[] temp=new int[data.length]; $] js0)>
mergeSort(data,temp,0,data.length-1); 9Q!X~L|\S
} ,oW8im
VW7 ?{EL7
private void mergeSort(int[] data, int[] temp, int l, int r) { I+) Acy;
int i, j, k; aZe[Nos
int mid = (l + r) / 2; w85PRruW
if (l == r) nly`\0C
return; H:~41f[
if ((mid - l) >= THRESHOLD) x?ajTzMv
mergeSort(data, temp, l, mid); 'xO^2m+N;
else =w~phn
insertSort(data, l, mid - l + 1); }v'jFIkhI
if ((r - mid) > THRESHOLD) S?Y,sl+A:
mergeSort(data, temp, mid + 1, r); p'2ZDd=v
else `_IgH
insertSort(data, mid + 1, r - mid); HiBw==vlV
9s5PJj"u
for (i = l; i <= mid; i++) { UTatcn
temp = data; :v_H;UU
} mUj=NRq
for (j = 1; j <= r - mid; j++) { 9d7$Fz#
temp[r - j + 1] = data[j + mid]; G/F0)M
} @K 8sNPK
int a = temp[l]; Pkr0|bs*
int b = temp[r]; Y.O/~af
for (i = l, j = r, k = l; k <= r; k++) { I2@pkVv3z
if (a < b) { 0]dL;~0y.
data[k] = temp[i++]; 4{d`-reHg
a = temp; W$x'+t5H
} else { FFTh}>>
data[k] = temp[j--]; bDLPA27
b = temp[j]; MZt~ Abt
} G22=8V
} $-dz1}
} Td&w
C<!%VHs
/** XYbc1+C
* @param data yqpb_h9
* @param l qTA@0fL
* @param i PvzB, 2":
*/ Kt,ENbF
private void insertSort(int[] data, int start, int len) { t]Ey~-Rx
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); EUvxil
} ^Zh YW
} `>@n6>f
} r5!I|E
} iJg3`1@j
8oI)q4V
堆排序： q]%c 6{w
kRBPl99
package org.rut.util.algorithm.support; ^(p}hSLAfQ
:tu_@3bg-
import org.rut.util.algorithm.SortUtil; sjLI^#a
ER:)Fk>_
/** ?)9mHo^
* @author treeroot rC>')`uk
* @since 2006-2-2 Ku{DdiTg>
* @version 1.0 x\vb@!BZ
*/ C LhD[/Fo
public class HeapSort implements SortUtil.Sort{ /? n 9c;w
Ak!l}d
/* (non-Javadoc) X!0s__IOc
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) vb{+yEa
*/ Dm':D
public void sort(int[] data) { ]k[y#oB
MaxHeap h=new MaxHeap(); [@@Ovv
h.init(data); 4 |$|]E
for(int i=0;i h.remove(); > m GO08X
System.arraycopy(h.queue,1,data,0,data.length); GI}h)T
} |q?I(b4Q@
XDvT#(Pu
private static class MaxHeap{ U!sv6=(y@
N{@kgc
void init(int[] data){ s}Q%]W
this.queue=new int[data.length+1]; G`NH~C
for(int i=0;i queue[++size]=data; hS4Ljyeg
fixUp(size); 8H_3.MK
} ^'DrU<o
} {5U;9: sO6
7kM_Ijd$
private int size=0; O$B]#]L+
372ewh3'
private int[] queue; JcxhI]E
pmAir:
public int get() { /U[Y w)
return queue[1]; C !81Km5
} B[^mWVp6L
r=dFk?8XbC
public void remove() { DoA4#+RU
SortUtil.swap(queue,1,size--); kStWsc$;+T
fixDown(1); ?6@Y"5 z3g
} vB, X)
file://fixdown LV{a^!f`y
private void fixDown(int k) { V|vU17Cgy
int j; t#mW`rGE_
while ((j = k << 1) <= size) { Gnmj-'x
if (j < size %26amp;%26amp; queue[j] j++; Y3jb'S4(
if (queue[k]>queue[j]) file://不用交换 c$ Kn.<a
break; mPGF Y
SortUtil.swap(queue,j,k); +`Bm
k = j; v`B7[B4K3
} ^I9x@t
} W&y%fd\&3
private void fixUp(int k) { Zk2-U"0\o
while (k > 1) { XiI@Px?FL
int j = k >> 1; ymybj
if (queue[j]>queue[k]) ,WbO8#z+
break; BuI&kU,WY
SortUtil.swap(queue,j,k); 5B| iBS l
k = j; R%XbO~{u
} z7F~;IB*u
} ^lB'7#7
!<}<HR^)
} sj003jeko
ptGM'
} |_HH[s*U
3+"z
SortUtil： ?f[#O&#
eu~WFI
package org.rut.util.algorithm; +Ck<tx3h&
?G+v#?A
import org.rut.util.algorithm.support.BubbleSort; NMmk,
import org.rut.util.algorithm.support.HeapSort; R`Hyg4?
import org.rut.util.algorithm.support.ImprovedMergeSort; Z<z(;)?c
import org.rut.util.algorithm.support.ImprovedQuickSort; IX;u+B
import org.rut.util.algorithm.support.InsertSort; |eWlB\ x8
import org.rut.util.algorithm.support.MergeSort; <oTIzj7f
import org.rut.util.algorithm.support.QuickSort; N54U [sy
import org.rut.util.algorithm.support.SelectionSort; I :%(nKBK
import org.rut.util.algorithm.support.ShellSort; P-[6xu+]
"zR+}
/** Z1u{.^~^z
* @author treeroot 5YMjvhr?W
* @since 2006-2-2 4dv+RRpGOv
* @version 1.0 B|gyr4]
*/ Zz=+?L
public class SortUtil { bTE%p0
public final static int INSERT = 1; *^ncb,1+i
public final static int BUBBLE = 2; n !]_o
public final static int SELECTION = 3; yb56nd
public final static int SHELL = 4; >y"V%
public final static int QUICK = 5; 5Y)*-JY1g
public final static int IMPROVED_QUICK = 6; &,2XrXiFu
public final static int MERGE = 7; I0sd%'Ht?
public final static int IMPROVED_MERGE = 8; U)=?3}s(
public final static int HEAP = 9; ^k]OQc7q'
>7B6iR6N
public static void sort(int[] data) { Eic/#j{4
sort(data, IMPROVED_QUICK); DG}t!
} y[oc^Zuo
private static String[] name={ |"?0H#
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" )t{?7wy
}; ir-srVoXy
xrxORtJ<
private static Sort[] impl=new Sort[]{ 6%~ Z^>`N
new InsertSort(), i]a 5cn
new BubbleSort(), ,]\L\V
new SelectionSort(), Zsc710_
new ShellSort(), *=mtt^yZ
new QuickSort(), xCz(qR
new ImprovedQuickSort(), @v\Osp t=
new MergeSort(), Z0s}65BR
new ImprovedMergeSort(), wP8Wx~Q=
new HeapSort() |jH- bm
}; C|bnUN
*,q ?mO
public static String toString(int algorithm){ IWERn v!
return name[algorithm-1]; '`&gSL.1a@
} SB0Cq
/ CEnyE/
public static void sort(int[] data, int algorithm) { \/J>I1J
impl[algorithm-1].sort(data); ZpvURp,I
} AE? 0UVI
F9p'|-
public static interface Sort { `w';}sQA7
public void sort(int[] data); u:JD
} ~x^E kE
`dekaRo
public static void swap(int[] data, int i, int j) { 8Yc'4v#}
int temp = data; ~o_0RB
data = data[j]; k=!lPIx
data[j] = temp; lHQ:LI
} KK$t3e)
} w#mnab@