[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; HQrx9CXE
} 7]8apei|
int i1=l; (EOYJHZB!
int i2=mid+1; vi0nJ -Xg
for(int cur=l;cur<=r;cur++){ N`5 mPE
if(i1==mid+1) _(:bGI'.m
data[cur]=temp[i2++]; FJ O-p
else if(i2>r) Iz I hC
data[cur]=temp[i1++]; lkgB,cflpi
else if(temp[i1] data[cur]=temp[i1++]; A)D1 #,0
else Us8nOr>5
data[cur]=temp[i2++]; ?) VBkA5j
} (e[8`C
} o1u?H4z
4G=KyRKh
} :Pi="
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改进后的归并排序: );ZxKGjc4
i M!=/
package org.rut.util.algorithm.support; MH_3nN
Bfr$&?j#
import org.rut.util.algorithm.SortUtil; g}*F"k4j
Z<$y)bf
/** ~*ll,<L:
* @author treeroot 0%]F&|
* @since 2006-2-2 Z`kI6
* @version 1.0 }e&Z"H |
*/ .T^e8
public class ImprovedMergeSort implements SortUtil.Sort { T3^(I~03
CYN|
private static final int THRESHOLD = 10; ~ ^)4*@i6
0uf)6(f
/* 0-zIohSJdQ
* (non-Javadoc) xX{gm'3UYa
* 47 9yG/+\
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) N(L?F):fT
*/ c=~FXV!
public void sort(int[] data) { Vw b6QIs
int[] temp=new int[data.length]; /}RW~ax
mergeSort(data,temp,0,data.length-1); $rmfE
} Y+_t50S
.06[*S
private void mergeSort(int[] data, int[] temp, int l, int r) { w:o,mzuXK
int i, j, k; vrvOPLiQ
int mid = (l + r) / 2; f;%\4TH?
if (l == r) #N `Z)}Jm
return; @(LEuYq}
if ((mid - l) >= THRESHOLD) 8hm|9
mergeSort(data, temp, l, mid); 5j-?Uf
else bupDnTF
insertSort(data, l, mid - l + 1); :LBRyBV
if ((r - mid) > THRESHOLD) aak[U;rx
mergeSort(data, temp, mid + 1, r); tD\%SiTg=b
else %P-z3 0FHp
insertSort(data, mid + 1, r - mid); uOprA`3
j43-YdCJ
for (i = l; i <= mid; i++) { @j?)uJ0Q
temp = data; ,.&y-?
} jsnk*>j
for (j = 1; j <= r - mid; j++) { ayoqitXD?
temp[r - j + 1] = data[j + mid]; 84u%_4/
} ".T&nS[z
int a = temp[l]; YCEdt>5PA
int b = temp[r]; <GRrw
for (i = l, j = r, k = l; k <= r; k++) { MLn\b0
if (a < b) { :I^I=A%Pe(
data[k] = temp[i++]; @b"J FB|
a = temp; %oqC5O6
} else { 6$*ZH*
data[k] = temp[j--]; O#S27.
b = temp[j]; gN/6%,H}
} 'J"m`a8no
} 7>>6c7e
} dUL3UY3
DZ~qk+,I
/** V50FX}i
* @param data LHJjPf)F
* @param l V?"SrXN>
* @param i ZF6?N?t}h8
*/ HCTjFW>C
private void insertSort(int[] data, int start, int len) { o&b1-=MC2
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); cq \()uF'c
} Erd)P
} 1dahVc1W
} 2[R{IV8e
} i?1g{JW
}qOj^pkJ
堆排序： rkz_h
V[T`I a\
package org.rut.util.algorithm.support; Auz.wes
p?,:
import org.rut.util.algorithm.SortUtil; r^|AiYI)
?go+oS^
/** yDW$v/j.|
* @author treeroot ^+20e3 ~Y
* @since 2006-2-2 1JXa/f+
* @version 1.0 Q]d3a+dK
*/ J}UG{RttI
public class HeapSort implements SortUtil.Sort{ ,/>hWAx
;.4A,7w#
/* (non-Javadoc) (( D*kd"
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) T,eP&IN
*/ x O~t
public void sort(int[] data) { 4#^?-6
MaxHeap h=new MaxHeap(); \$] V#@F
h.init(data); ow{SsX
for(int i=0;i h.remove(); k{q4Zz[
System.arraycopy(h.queue,1,data,0,data.length); <i(<|/$
} ` kG}NJf
J` J^C
private static class MaxHeap{ kt*""&R
LCMCpEtY*K
void init(int[] data){ 3A(sT}
this.queue=new int[data.length+1]; }+1Y>W7q
for(int i=0;i queue[++size]=data; 8Vb.%f&I
fixUp(size); 1JI\e6]I
} vhQIkB8
} Rg!Fu
]c'12 g]h
private int size=0; E1uyMh-dy
w[S!U<9/
private int[] queue; 8~>5k
DL0i
public int get() { J<4egk4
return queue[1]; oSOO5dk:z
} xF4>D!T%8
,>rr|O
public void remove() { Rr|&~%#z
SortUtil.swap(queue,1,size--); {:;599l
fixDown(1); *$I5_A8,.
} ;Xw'WMb*=
file://fixdown "+6:vhP5
private void fixDown(int k) { W+C@(}pt
int j; ]'2;6%.4
while ((j = k << 1) <= size) { SCZ6:P"$qX
if (j < size %26amp;%26amp; queue[j] j++; ~K-c-Zs#z
if (queue[k]>queue[j]) file://不用交换 }yfSF|\
break; !F_BLHig
SortUtil.swap(queue,j,k); {T0f]]}Q
k = j; K9YD)351t
} cJnAwIs_e`
} } :@s
private void fixUp(int k) { Q8kdX6NMd&
while (k > 1) { nCz_gYcIx
int j = k >> 1; &Q85Bq
if (queue[j]>queue[k]) eKq`t.*Ft
break; _ xAL0 (
SortUtil.swap(queue,j,k); $]Vvu{
k = j; 5zqlK-$
} ^\z.E?v%
} ]}~[2k.
El}."}l&
} =D2jJk?AX
.9< i
} &F*L=Ng
%6vf~oG
SortUtil： wm$1LZ8o-`
8$H_:*A?
package org.rut.util.algorithm; I}#_Jt3R
5gPcsn"D
import org.rut.util.algorithm.support.BubbleSort; fJb<<6C
import org.rut.util.algorithm.support.HeapSort; Nl3@i`;
import org.rut.util.algorithm.support.ImprovedMergeSort; ~ "^]\3#
import org.rut.util.algorithm.support.ImprovedQuickSort; 5f:Mb|.?
import org.rut.util.algorithm.support.InsertSort; }CiB+
import org.rut.util.algorithm.support.MergeSort; me+F0:L
import org.rut.util.algorithm.support.QuickSort; y3]7^+k
import org.rut.util.algorithm.support.SelectionSort; )L*6xTa~
import org.rut.util.algorithm.support.ShellSort; @o[C Xrz
/a?*Ap5"
/** l 4zl|6%
* @author treeroot c3X'Sv
* @since 2006-2-2 yj6o533o
* @version 1.0 0<8pG:BQ
*/ +$hqwNh@Z@
public class SortUtil { y7;i4::A\
public final static int INSERT = 1; bF#*cH
public final static int BUBBLE = 2; $rAHtr
public final static int SELECTION = 3; XQW+6LEQ
public final static int SHELL = 4; XF`,mV4
public final static int QUICK = 5; 7g}lg8M
public final static int IMPROVED_QUICK = 6; '8Q:}{
public final static int MERGE = 7; 1kG{z;9
public final static int IMPROVED_MERGE = 8; |hp_<F9.
public final static int HEAP = 9; \BV$p2m5-
\B0,?_i
public static void sort(int[] data) { WW'8&:x
sort(data, IMPROVED_QUICK); h@5mVTb}i
} 5ayM}u%\~
private static String[] name={ ^r u1QDT
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" fgs){Ng`
}; .#M'
#bqc}h9
private static Sort[] impl=new Sort[]{ l Ikh4T6i
new InsertSort(), {xw"t9(fE
new BubbleSort(), Rn(vG-xQ
new SelectionSort(), `h>a2
new ShellSort(), Q -!,yCu
new QuickSort(), @A_bZQ@
new ImprovedQuickSort(), y5d=r]_S:
new MergeSort(), E|(T(4;
new ImprovedMergeSort(), s&<6{AU(id
new HeapSort() 3HU_~%l
}; vPm&0,R*y:
+bG^SH2ke
public static String toString(int algorithm){ s~@4
return name[algorithm-1]; ~w&P]L\dB
} 7IrbwAGZ3
y#4f^J!V
public static void sort(int[] data, int algorithm) { 'l%b5:
impl[algorithm-1].sort(data); vo9DmW
} %_rdO(
3fS+,>s\O
public static interface Sort { gEVN;G'B<=
public void sort(int[] data); b h%@Lo
} 7~2b4"&
(vq0Gl
public static void swap(int[] data, int i, int j) { tgy= .o]
int temp = data; @a08*"lbp
data = data[j]; 2yu\fu
data[j] = temp; _vQtV]
} %SG**7
} 5B&#Sh`r