[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; .`>y@p!
} a:QDBS2Llv
int i1=l; 34\(7JO
int i2=mid+1; V3 ~~
for(int cur=l;cur<=r;cur++){ |$5[(6T|
if(i1==mid+1) 5j~$Mj`
data[cur]=temp[i2++]; e[hcJz!D
else if(i2>r) Aq3}Ng
data[cur]=temp[i1++]; V5*OA??k<
else if(temp[i1] data[cur]=temp[i1++]; ,#pXpAz/
else ^Q+g({
data[cur]=temp[i2++]; yX~v-N!X
} pAT7)Ch
} GnvL'ESa@M
j~*L~7
} w*R$o
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改进后的归并排序: uu`G 2[t
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package org.rut.util.algorithm.support; Z?\>JM >;
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import org.rut.util.algorithm.SortUtil; P#AW\d^"B
t.;LnrY
/** 6i}iAP|0
* @author treeroot K.0:C`C
* @since 2006-2-2 Cg(Y&Gxf.
* @version 1.0 .0es3Rj
*/ b9!FC$^J
public class ImprovedMergeSort implements SortUtil.Sort { WYr/oRO
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private static final int THRESHOLD = 10; <~WsD)=$
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/* >D4#y
* (non-Javadoc) 8SGo9[U2
* ga`3 (
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) :\|SQKD
*/ 9E6_]8rl
public void sort(int[] data) { `E>1>'
int[] temp=new int[data.length]; Ig f&l`\
mergeSort(data,temp,0,data.length-1); "yS _s
} P}4QQw
u?}(P_9
private void mergeSort(int[] data, int[] temp, int l, int r) { I"ok&^t^}
int i, j, k; f.9SB
int mid = (l + r) / 2; R#I0|;q4|p
if (l == r) 5rU[Tir
return; Sn|BlXrey
if ((mid - l) >= THRESHOLD) V{!J-nO
mergeSort(data, temp, l, mid); y2^Y/)
else H*r)Z90
insertSort(data, l, mid - l + 1); N'GeHByIT
if ((r - mid) > THRESHOLD) T:=lz:}I
mergeSort(data, temp, mid + 1, r); MB~=f[cUnd
else IhVO@KJI
insertSort(data, mid + 1, r - mid); l`f/4vy
6V7B;tB
for (i = l; i <= mid; i++) { a m|F?|1
temp = data; ;5659!;
} 24z< gO
for (j = 1; j <= r - mid; j++) { A\HxDIU
temp[r - j + 1] = data[j + mid]; ;6>2"{NW
} f,018]|
int a = temp[l]; sTn<#l6
int b = temp[r]; 0.8 2kl
for (i = l, j = r, k = l; k <= r; k++) { WE:24b6
if (a < b) { m}7iTDJR9
data[k] = temp[i++]; AP'*Nh@Ik(
a = temp; XovRg,
} else { qVH1}9_
data[k] = temp[j--]; _./Sk|C
b = temp[j]; 2AT5
} 6ZP(E^.
} {xXsBh Y
} >n'o*gZM
1H6<[iHW
/** "@iK' c^
* @param data :bwjJ}F
* @param l y1dDO2mA
* @param i n*[XR`r}
*/ ;:\<gVi:
private void insertSort(int[] data, int start, int len) { <G|(|E1
for(int i=start+1;i for(int j=i;(j>start) %26amp;%26amp; data[j] SortUtil.swap(data,j,j-1); fF7bBE)L/|
} `d5%.N
} RI(DXWM|h
} 9]f!'d!5
} tX_R_]v3
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堆排序： ;f#v0W`5
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package org.rut.util.algorithm.support; _m5uDF?[
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import org.rut.util.algorithm.SortUtil; Oo5w?+t
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/** ILEz;D{]
* @author treeroot 4|riKo)
* @since 2006-2-2 gQ Fjr_IS#
* @version 1.0 %5M/s'O?i
*/ WrQDX3
public class HeapSort implements SortUtil.Sort{ X' H[7 ^W
<D<4BnZ(
/* (non-Javadoc) ,(d)Qg
* @see org.rut.util.algorithm.SortUtil.Sort#sort(int[]) G_bG
*/ 8m2Tk\;:
public void sort(int[] data) { \<JSkr[h!"
MaxHeap h=new MaxHeap(); 7K,-01-:
h.init(data); A9I{2qW9+Z
for(int i=0;i h.remove(); 3er nTD*`
System.arraycopy(h.queue,1,data,0,data.length); l=S35og
} ~.{/0T
b6nsg|&#
private static class MaxHeap{ :ubV};
4>F'oqFF
void init(int[] data){ 0m%|U'm|j
this.queue=new int[data.length+1]; 5D\f8L
for(int i=0;i queue[++size]=data; {> eXR?s/
fixUp(size); [I'0,y
} nw-xSS{
} gw#5jW\
s.bc>E0
private int size=0; 27 ]':A4_
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private int[] queue; ]zj9A]i:a
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public int get() { ^U `[(kz=
return queue[1]; Ixb=L(V
} 2|3)S`WZl
RQ vft
public void remove() { U 9_9l7&r
SortUtil.swap(queue,1,size--); (D#B_`;-
fixDown(1); Oft-w)cYz,
} -I*^-+>H
file://fixdown 7!@-*/|!S9
private void fixDown(int k) { cii_U=
int j; .{ocV#{s
while ((j = k << 1) <= size) { jN{Xfjmfv
if (j < size %26amp;%26amp; queue[j] j++; S^-DK~Xt4
if (queue[k]>queue[j]) file://不用交换 K&vF0*gN3
break; <;vbsksZeH
SortUtil.swap(queue,j,k); zMj#KA1
k = j; ]$ L|
} mw_~*Nc'9
} YLqGRE`W
private void fixUp(int k) { {IxA)v-`
while (k > 1) { Eo{"9j\
int j = k >> 1; ^8 zR
if (queue[j]>queue[k]) [$qyF|/K`n
break; /xsF90c\h
SortUtil.swap(queue,j,k); U &C!}
k = j; -e_hrCW&9
} -=%@L&y1
} JLnH&(O
XRcqhv
} {_7i8c<s=
?3nR
} CnpV:>V=
*!q1Kr6r
SortUtil： C`$n[kCJ
l n{e1':$"
package org.rut.util.algorithm; 3L<wQ(
7op`s5i
import org.rut.util.algorithm.support.BubbleSort; &+cEV6vb+
import org.rut.util.algorithm.support.HeapSort; iIMd!Q.)@
import org.rut.util.algorithm.support.ImprovedMergeSort; 3vuivU.3
import org.rut.util.algorithm.support.ImprovedQuickSort; G0/4JSH
import org.rut.util.algorithm.support.InsertSort; T ?$:'XJ
import org.rut.util.algorithm.support.MergeSort; 5]NqRI^0
import org.rut.util.algorithm.support.QuickSort; (zgW%{V@
import org.rut.util.algorithm.support.SelectionSort; 0xxg|;h.,g
import org.rut.util.algorithm.support.ShellSort; d6'{rje(
c9HrMgW
/** n!NS(.o
* @author treeroot tXoWwQD;Y
* @since 2006-2-2 q;R],7Re
* @version 1.0 5"CZh.J
*/ +1uF !G&l
public class SortUtil { RX>xB
public final static int INSERT = 1; GC?ON0g5s
public final static int BUBBLE = 2; syWG'(>
public final static int SELECTION = 3; Ir {OheJ
public final static int SHELL = 4; s"0Y3x3
public final static int QUICK = 5; oI=fx Sjd
public final static int IMPROVED_QUICK = 6; 0O9Ni='Tn
public final static int MERGE = 7; 4[.oPK=i
public final static int IMPROVED_MERGE = 8; F<L EQ7T
public final static int HEAP = 9; 3?c3<`TW
IAw{P08+
public static void sort(int[] data) { ! ='rc-E
sort(data, IMPROVED_QUICK); Hc>m;[M)l
} ]QpWih00V
private static String[] name={ j<Bkj/
"insert", "bubble", "selection", "shell", "quick", "improved_quick", "merge", "improved_merge", "heap" <L"GqNuRQ
}; U*i{5/$
b:Wm8pp?
private static Sort[] impl=new Sort[]{ spdvZU=}
new InsertSort(), 55tKTpV
new BubbleSort(), { vKLAxc
new SelectionSort(), o$#G0}yn
new ShellSort(), -&3hEv5
new QuickSort(), 4?ICy/,U-
new ImprovedQuickSort(), gLE:g5v6
new MergeSort(), I,0q4
new ImprovedMergeSort(), JBi*P.79^
new HeapSort() V#XppYU
}; )\eI;8
%+j8["VEC
public static String toString(int algorithm){ LW[9
return name[algorithm-1]; m;'6MHx;
} PK{acen
jF0jkj1&/[
public static void sort(int[] data, int algorithm) { )+[ gd/<C.
impl[algorithm-1].sort(data); P0W*C6&71|
} UJM1VAJ0
)Qe~8u@?
public static interface Sort { pimtiQqC
public void sort(int[] data); HkO7R `
} l|/ep:x8
#:[t^}
public static void swap(int[] data, int i, int j) { mVVD!
int temp = data; (#Wu#F1;
data = data[j]; 9fhsIe
data[j] = temp; VHCK2}ps
} KVn []@#
} YL]Z<%aKt